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Thermodynamics Behavior of Titanium for BOF Smelting Bearing Steel 被引量:9
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作者 LIU Yue WU Wei +2 位作者 LIU Liu LIU Ming LI Yang-zhou 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第6期74-78,共5页
When titanium element appears in bearing steel, it is very easy to create titanium nitride inclusion, which reduces the fatigue life of bearing steel. Based on the production data of bearing steel produced by BOF, it ... When titanium element appears in bearing steel, it is very easy to create titanium nitride inclusion, which reduces the fatigue life of bearing steel. Based on the production data of bearing steel produced by BOF, it is found that the titanium takes its source in bearing steel; the factors-affecting titanium content, and the thermodynamics behavior of titanium under smelting condition were studied. The results show that the prime reasons of titanium content increment are the soluble aluminum content and the titanium oxide of slag. The comparison between the experimental data and theoretical ones shows that there is a big declination when the soluble aluminum content of steel is higher, which is caused by the nonequilibrium reaction of slag and steel. The apparent equilibrium distribution coefficient of titanium between slag and steel is Obtained by use of experimental data. 展开更多
关键词 BOF bearing steel titanium thermodynamics apparent equilibrium distribution coefficient
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Microstructures of brazing zone between titanium alloy and stainless steel using various filler metals 被引量:12
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作者 Taeshin CHUNG Jungsoo KIM +2 位作者 Jeongseok BANG Byoungho RHEE Daegeun NAM 《中国有色金属学会会刊:英文版》 CSCD 2012年第S3期639-644,共6页
Titanium alloy (Ti-Al-V alloy) substrate was brazed with stainless steel (STS304) using filler metal.At an optimized brazing condition,various filler metals were used.Microstructures were observed at each condition.Fi... Titanium alloy (Ti-Al-V alloy) substrate was brazed with stainless steel (STS304) using filler metal.At an optimized brazing condition,various filler metals were used.Microstructures were observed at each condition.Filler metals were titanium based 40Ti-20Zr-20Cu-20Ni,silver based Ag 5Pd,and nickel based Ni-7Cr-3.1B-4.5Si-3Fe-0.06C (BNi2) and Ni-14Cr-10P-0.06C (BNi7).To select a good filler metal for brazing process,wetting test was performed at 880-1050 °C.It was not brazed using silver based filler metals,but at the conditions using titanium and nickel based filler metals had brazed zone between titanium alloy and stainless steel.However,titanium alloy was eroded during brazing using titanium based filler metals.Nickel based filler metal has a good brazed zone between titanium alloy and stainless steel among the filler metals. 展开更多
关键词 BRAZING FILLER metal titanium alloy STAINLESS steel
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Study on the interface of direct hot rolling titanium-clad steel plates 被引量:9
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作者 SUN Jifeng LIANG Xiaojun JIAO Sihai 《Baosteel Technical Research》 CAS 2017年第1期32-39,共8页
In this study,the interface characteristics of a direct hot rolling titanium-clad steel plate were analyzed, and the mechanism of interface cracking was explored. The detrimental effect from the formation of TiFe ,TiC... In this study,the interface characteristics of a direct hot rolling titanium-clad steel plate were analyzed, and the mechanism of interface cracking was explored. The detrimental effect from the formation of TiFe ,TiC,and a Si-enriched layer on the bonding strength was clarified, and an industrial-scaled titanium-clad steel plate with shear strength over 200 MPa was produced with a carefully set schedule accordingly. It was found that hot rolling titanium-clad steel plates had a flat interface without obvious cracks. In the rolling process,both Ti and Fe atoms interdiflhsed,but Fe difthsed much faster than Ti. The Fe-diffused area consisted of three regions. After a high temperature heat treatment, the diffusion depth of Fe and Ti elements increased significantly and evident Si segregation and TiFe layers were identified. Thermal cracking initiated in the Si segregation layer and then propagated along the TiFe layer and Fe-diffused layer on the titanium side. 展开更多
关键词 titanium-clad steel plate INTERFACE DIFFUSION heat treatment
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Low cycle fatigue behavior of zirconium−titanium−steel composite plate 被引量:1
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作者 Bin-bin ZHOU Peng YU +3 位作者 Le CHANG Chang-yu ZHOU Cheng YE Bo-jun ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第5期1530-1547,共18页
The low cycle fatigue behavior of zirconium−titanium−steel composite plate under symmetrical and asymmetric stress control was studied.The effects of mean stress and stress amplitude on cyclic deformation,ratcheting e... The low cycle fatigue behavior of zirconium−titanium−steel composite plate under symmetrical and asymmetric stress control was studied.The effects of mean stress and stress amplitude on cyclic deformation,ratcheting effect and damage mechanism were discussed in detail.The results show that under symmetric stress control,the forward ratcheting deformation is observed.Under asymmetric stress control,the ratcheting strain increases rapidly with mean stress and stress amplitude increasing.Under high stress amplitude,the influence of mean stress is more significant.In addition,by studying the variation of strain energy density,it is found that the stress amplitude mainly promotes the fatigue damage,while the mean stress leads to the ratcheting damage.In addition,fractographic observation shows that the crack initiates in the brittle metal compound at the interface,and the steel has higher resistance to crack propagation.Finally,the accuracy of life prediction model considering ratcheting effect is discussed in detail,and a high-precision life prediction model directly based on mean stress and stress amplitude is proposed. 展开更多
关键词 zirconium−titaniumsteel composite plate low cycle fatigue behavior fatigue damage mean stress ratcheting effect life prediction model
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Interfacial microstructure and property of resistance spot welding joints of titanium to stainless steel 被引量:2
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作者 张晓娇 邱然锋 +2 位作者 张柯柯 代乐宜 石红信 《China Welding》 EI CAS 2013年第2期43-48,共6页
Commercially pure titanium and stainless steel sheets were welded using the technique of resistance spot welding with an aluminum alloy insert. The interfacial microstructure of the joint was observed and analyzed usi... Commercially pure titanium and stainless steel sheets were welded using the technique of resistance spot welding with an aluminum alloy insert. The interfacial microstructure of the joint was observed and analyzed using electron microscopy; the tensile shear strength was investigated. An approximate 160 nm thick layer of Al solid solution supersaturated with Ti was observed at the interface between titanium and aluminum alloy. The solid solution layer contained the precipitates TiAla. And an approximate 1. 5 μm thick serrate reaction layer was observed at the interface between stainless steel and aluminum alloy. The maximum tensile shear load of 5.38 kN was obtained from the joint welded at the welding current of 10 kA. The results reveal that the property of the joint between titanium and stainless steel can be improved by using an aluminum alloy insert. 展开更多
关键词 resistance spot welding titanium stainless steel INTERFACE microstructure
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Effect of interface morphology on the mechanical properties of titanium clad steel plates 被引量:5
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作者 Ji-xiong Liu Ai-min Zhao +3 位作者 Hai-tao Jiang Di Tang Xiao-ge Duan Heng-yong Shui 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第5期404-408,共5页
Interface morphology has important influence on the bond quality of titanium clad steel plates. The mechanical properties of titanium clad steel plates with wavy and straight interfaces were investigated by tensile-sh... Interface morphology has important influence on the bond quality of titanium clad steel plates. The mechanical properties of titanium clad steel plates with wavy and straight interfaces were investigated by tensile-shear tests and bending tests. The interface morphology of the plates was examined by optical microscopy (OM) and scanning electron microscopy (SEM). The experimental results show that the shear strength of a wavy interface is higher than that of a straight interface. A wavy interface is the guarantee for obtaining high shear strength to provide a greater shear resistance. During the maerobending process, cracks appear in the swirl of the wave tip and ferrotitanium intermetallies. For in-situ observing the bending process by SEM, the wave tip of a wavy interface and the massive ferrotitartium intermetallies of a straight interface are places where cracks initiate and propagate. The results are the same as those observed in the macrobending process. Became of high hardness, the wave tip and the massive ferrotitanium intermetallies are hard in terms of compatible deformation. 展开更多
关键词 clad metals CLADDING titanium low carbon steel interfaces MORPHOLOGY mechanical properties
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Zr-Ti-Ni-Cu Amorphous Brazing Fillers Applied to Brazing Titanium TA2 and Q235 Steel 被引量:1
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作者 Jie Cui Qiuya Zhai +2 位作者 Jinfeng Xu Yahui Wang Jianlin Ye 《Materials Sciences and Applications》 2014年第11期823-829,共7页
Ti-Zr-Cu-Ni amorphous filler with good performance is suitable for joining TC and TB titanium alloy, but its melting temperature is higher than 882.5°C, the α→β phase transition temperature of TA2, which makes... Ti-Zr-Cu-Ni amorphous filler with good performance is suitable for joining TC and TB titanium alloy, but its melting temperature is higher than 882.5°C, the α→β phase transition temperature of TA2, which makes the ductility of TA2 fall and the microstructure of the joint coarse. In this paper, Ti-Zr-Cu-Ni amorphous filler was redesigned and optimized by using orthogonal experiment to obtain three easy-to-use Zr-Ti-Ni-Cu amorphous fillers with low melting points and good plasticity. The fast cooling equipment was used to fabricate the brazing filler foils to implement the braze welding of TA2 and Q235 with high frequency inductance. The results indicate that all the brazing foils are amorphous structure with lower melting temperature, for example, Zr52Ti22Ni18Cu8 filler’s is 538°C. The technical parameters in brazing welding are: welding temperature T = 800°C;heating electric current I =25 A;heating time t = 15 s and holding time t = 15 s, in the case of these conditions, the jointing head shear strength of TA2/Zr52Ti24Ni13Cu11/Q235 is 139 MPa. Fracture is mainly located in the brazing seam. The white brittle intermetallic TiFe, TiFe2 and enhancement TiC spread in the center zone of brazing seam. 展开更多
关键词 titanium/steel BRAZING AMORPHOUS BRAZING Filler Joint Microstructure Shear Strength
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Microstructure,properties and first principles calculation of titanium alloy/steel by Nd: YAG laser self-fluxing welding 被引量:11
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作者 Zhang Yifu Zhang Hua +1 位作者 Zhu Zhengqiang Pan Jiluan 《China Welding》 EI CAS 2018年第3期1-10,共10页
The experiment of Nd: YAG pulsed laser self-fluxing welding for 304 stainless steel/Ti6Al4V titanium alloy dissimilar metal was carried out. The microstructure properties of welded joint were analyzed by SEM, EDS and... The experiment of Nd: YAG pulsed laser self-fluxing welding for 304 stainless steel/Ti6Al4V titanium alloy dissimilar metal was carried out. The microstructure properties of welded joint were analyzed by SEM, EDS and XRD. The equilibrium lattice constants, enthalpies of formation, cohesive energies, mechanical properties, Debye temperatures and valence electron structures of Ti-Fe intermetallic compounds (IMCs) were calculated by the first principle pseudopotential plane wave method based on density functional theory (DFT). According to the thermodynamic data of Ti-Fe-Cr compounds, the Gibbs free energy per mole of compound at different temperatures was calculated and their thermal stability was compared. The results show that there are no macroscopic cracks in the welded joints, and the IMCs distributed evenly along the welding interface exhibits 3 distinct layers of microstructure with different colors. The welds interface generates IMCs of TiFe, TiFe 2 and a small amount of Ti 5Cr 7Fe 17 IMCs. Ti-Fe IMCs with high thermodynamic stability and easy alloying formation. The results of Gibbs free energies show that the sequence of precipitates in the interface is Ti 5Cr 7Fe 17 , TiFe 2 and TiFe in high temperature during the metallurgical reaction. The G/B values of Ti-Fe IMCs are greater than the critical value of 0.5, indicating that it is an intrinsic brittleness. 展开更多
关键词 Nd:YAG pulsed laser self-fluxing welding titanium alloy stainless steel first-principle calculation
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Delayed Fracture Behavior of CrMo-Type High Strength Steel Containing Titanium 被引量:7
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作者 HUIWei-jun DONGHan +3 位作者 WENGYu-qing WANGMao-qiu CHENSi-lian SHIJie 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2005年第1期43-49,共7页
The delayed fracture behaviors of CrMo-type high strength steels containing different amount of titanium(0to 0.10%)were studied.The steels were quenched at 880℃ and tempered from 400℃ to 650℃,and a wide range of te... The delayed fracture behaviors of CrMo-type high strength steels containing different amount of titanium(0to 0.10%)were studied.The steels were quenched at 880℃ and tempered from 400℃ to 650℃,and a wide range of tensile strength was obtained.The sustained load tensile test was carried out by using notched tensile specimens in Walpole solution.The experimental results showed that with higher strength,the Ti-microalloyed steels show higher resistance to delayed fracture compared with non-microalloyed steel due to titanium beneficial role and microstructure changes.The undissolved TiC is uniformly distributed as strong hydrogen traps,retarding or preventing the diffusion and accumulation of hydrogen to lower-interaction energy sites,such as prior austenite and martensite lath boundaries in stress concentration area.Meanwhile,the grain refining effect of titanium is also an important factor to improve the delayed fracture resistance of Ti-microalloyed steels.The characteristics of delayed fracture remain nearly the same with titanium addition. 展开更多
关键词 titanium delayed fracture high strength steel CrMo steel
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HIP diffusion bonding of P/M titanium alloy Ti-6Al-4V and stainless steel 1Cr18Ni9Ti 被引量:1
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作者 郎泽保 王亮 张绪虎 《中国有色金属学会会刊:英文版》 CSCD 2007年第A01期79-83,共5页
The HIP diffusion bonding of P/M titanium alloy Ti-6Al-4V and stainless steel 1Cr18Ni9Ti using pure Ni as intermediate layer was studied. Bonding joint with complex bonding interface was obtained by HIPing pre-alloyed... The HIP diffusion bonding of P/M titanium alloy Ti-6Al-4V and stainless steel 1Cr18Ni9Ti using pure Ni as intermediate layer was studied. Bonding joint with complex bonding interface was obtained by HIPing pre-alloyed Ti-6Al-4V powders and stainless steel 1Cr18Ni9Ti in a vacuum canning. The joint strengths were examined and the characteristics of bonding joint were observed. The result shows that the maximized strength of HIP diffusion bonding between P/M titanium alloy Ti-6Al-4V and stainless steel 1Cr18Ni9Ti can be up to 388 MPa and the microstructure of bonding joint is acceptable. 展开更多
关键词 合金 连接强度 不锈钢
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INTERFACIAL REACTIONS OF THE EXPLOSIVELY WELDED TITANIUM-STEEL COMPOSITE DURING HEAT TREATMENT
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作者 Xia, Changqing Jin, Zhanpeng 《中国有色金属学会会刊:英文版》 EI CSCD 1997年第2期83-86,共4页
INTERFACIALREACTIONSOFTHEEXPLOSIVELYWELDEDTITANIUM-STEELCOMPOSITEDURINGHEATTREATMENT①XiaChangqing,JinZhanpen... INTERFACIALREACTIONSOFTHEEXPLOSIVELYWELDEDTITANIUM-STEELCOMPOSITEDURINGHEATTREATMENT①XiaChangqing,JinZhanpengDepartmentofMate... 展开更多
关键词 titanium steel BOND interface microstructure diffusion PATH
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Research on the Solid Solution Behavior of Titanium Inclusion for the High Strength Tire Cord Steel
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作者 Jialiu Lei Dongnan Zhao Yuedong Jiang 《Journal of Surface Engineered Materials and Advanced Technology》 2018年第3期49-57,共9页
In order to improve the quality of the cord steel wire rod and achieve the effective control of titanium inclusion, the solid solution behavior of titanium inclusion in tire cord steel during the heating process was d... In order to improve the quality of the cord steel wire rod and achieve the effective control of titanium inclusion, the solid solution behavior of titanium inclusion in tire cord steel during the heating process was discussed in this paper, through the thermodynamic theory analysis, combined with the CLSM experiment. The conclusions are as follows: 1) According to the law of Ostwald repening, the coarsening rate of titanium carbonitride inclusion is very small, the coarsening behavior of titanium carbonitride inclusion cannot be considered in the heating and holding stage. 2) The solid solution behavior of titanium inclusion in the heating process is obviously existed. 3) Through the proper control of rolling temperature, holding time and the subsequent cooling rate, the size and quantity of large particle titanium inclusion in the high strength tire cord steel can be effectively controlled. 展开更多
关键词 TIRE CORD steel titanium INCLUSION Ostwald SOLID Solution CLSM
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Some Features of the Influence of Titanium and Nitrogen Addition to NiCrMoV Steel
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作者 Saeed Ghali Mamdouh Eissa Michael Mishreky 《Journal of Minerals and Materials Characterization and Engineering》 2018年第2期203-217,共15页
This paper reports a study of the addition effects of either titanium or titanium and nitrogen of steel grade DIN 56NiCrMoV7 on mechanical properties. Three steel grades were produced in 30 kg-induction furnace, one c... This paper reports a study of the addition effects of either titanium or titanium and nitrogen of steel grade DIN 56NiCrMoV7 on mechanical properties. Three steel grades were produced in 30 kg-induction furnace, one conforms the chemical composition of conventional 56NiCrMoV7 while the other two produced steels were microalloyed by either titanium or titanium and nitrogen. The produced cast steel grades were reheated to 1150°C and hold for 2 hours, followed by forging process. The forging process was carried out in temperature range 950°C - 1100°C. Solution treatment of hot forged steels was conducted at 880°C, 850°C followed by air and oil quenching, respectively. Quenched steel samples of different steel grades were tempered at different temperatures in the range of 300°C to 650°C for 45 min. The hardness variations after tempering of the two modified steels comparing with the conventional 56NiCrMoV7 steel were studied. Microadditions of titanium or titanium and nitrogen were found to produce secondary hardening at 550°C to 575°C (45 min) with a hardness peak higher than that attained in the conventional 56NiCrMoV7 steel. The effect of titanium and nitrogen additions on phases formation was investigated by Thermo-Calc. SEM was used to confirm Thermo-Calc analysis. Interpretation between hardness and formed phases has been illustrated. 展开更多
关键词 THERMO-CALC Tool steel VANADIUM titanium Nitrogen SECONDARY HARDENING
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Effects of aluminum and titanium on the microstructure of ODS steels fabricated by hot pressing 被引量:2
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作者 Qian Zhao Li-ming Yu +3 位作者 Yong-chang Liu Yuan Huang Zong-qing Ma Hui-jun Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第10期1156-1165,共10页
Three oxide-dispersion-strengthened(ODS)steels with compositions of Fe-14Cr-2W-0.2V-0.07Ta-0.3Y_2O_3(wt%,so as the follows)(14Y),Fe-14Cr-2W-0.2V-0.07Ta-1Al-0.3Y_2O_3(14YAl),and Fe-14Cr-2W-0.2V-0.07Ta-0.3Ti-0.3 Y_2O_3(... Three oxide-dispersion-strengthened(ODS)steels with compositions of Fe-14Cr-2W-0.2V-0.07Ta-0.3Y_2O_3(wt%,so as the follows)(14Y),Fe-14Cr-2W-0.2V-0.07Ta-1Al-0.3Y_2O_3(14YAl),and Fe-14Cr-2W-0.2V-0.07Ta-0.3Ti-0.3 Y_2O_3(14YTi)were fabricated by hot pressing.Transmission electron microscopy(TEM)was used to characterize the microstructures and nanoparticles of these ODS steels.According to the TEM results,14Y,14YAl,and 14YTi ODS steels present similar bimodal structures containing both large and small grains.The addition of Al or Ti has no obvious effect on the microstructure of the steels.The spatial and size distribution of the nanoparticles was also analyzed.The results indicate that the average size of nanoparticles in the 14YTi ODS steel is smaller than that in the 14YAl ODS steel.Nanoparticles such as Y_2O_3,Y_3Al_5O_(12) and YAlO_3,and Y_2Ti_2O_7 were identified in the 14Y,14YAl,and 14YTiODS steels,respectively. 展开更多
关键词 hot PRESSING ODS steel mechanical ALLOYING BIMODAL structure nanoparticle ALUMINUM titanium
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Titanium effect on the microstructure and properties of laminated high boron steel plates
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作者 Lin-lin Yuan Jing-tao Han +2 位作者 Jing Liu Dong-bin Wei Mehari Zelalem Abathun 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第5期492-499,共8页
High-boron steel is an important material used for thermal neutron shielding. The appropriate amount of added boron must be de- termined because excessive boron may deteriorate the steel's workability. A uniform micr... High-boron steel is an important material used for thermal neutron shielding. The appropriate amount of added boron must be de- termined because excessive boron may deteriorate the steel's workability. A uniform microstructure can be formed by adding titanium to boron steel. In this study, casting and hot rolling were used to fabricate laminated high-boron steel plates whose cores contained 2.25wt% boron and 0wt%-7.9wt% titanium. The effects of titanium content and hot-rolling and heat-treatment processes on the microstructure and properties of the laminated plates were studied. The results indicated that the optimum titanium content was 5.7wt% when the boron content was 2.25wt%, and that the best overall properties were obtained after heat treatment at 1100℃ for 4 h. The tensile strength, yield strength, and elongation at the specified temperature and holding time were as high as 526.88 MPa, 219.36 MPa, and 29%, respectively. 展开更多
关键词 boron steel laminated materials titanium BORIDE hot rolling heat treatment
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Analysis of thermodynamics and kinetics of titanium between top slag and liquid steel
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作者 ZHANG Feng 《Baosteel Technical Research》 CAS 2013年第1期28-33,共6页
: Titanium is an impurity element in some special steel grades. The existence of titanium decreases the grain size and lowers the yield strength ,resulting in low quality of these steels with regard to various proper... : Titanium is an impurity element in some special steel grades. The existence of titanium decreases the grain size and lowers the yield strength ,resulting in low quality of these steels with regard to various properties. Thus, the titanium content should be reduced to the minimum. Based on the industrial production of ultra-low carbon A1-Si killed steel, this paper investigated the physical-chemical behaviors of titanium with and without desulfurization during RH refining. The influences of Ti content in hot metal, ladle slag composition, and ladle slag quantity, etc., on the Ti content in refined liquid steel were discussed. The results show that the partition ratio of titanium between ladle slag and liquid steel is inversely proportional to the AI content to the power of 4/3 ,and the empirical formula regressed from practical experience can be expressed as w(TiO2)/WTi=48/w[AI]4/3 Maximum partition ratio of titanium between top slag and liquid steel can be ensured W[Til WIAIIby an optimum slag composition including components of FeOx and A12 03 and an appropriate slag basicity. The contents of FetO and A1203 should be controlled above 6% and below 20% respectively and the slag basicity should be kept within 1.5 to 3.0. Moreover, desulfurization refining in the RH vacuum will decrease the partition ratio of titanium between ladle slag and liquid steel significantly. To keep the Ti content stably below 15 ×10 ^-4% in a 300 ton ladle ,the Ti content in hot metal must be lower than 500 × 10^-4% and the thickness of ladle slag carried over from BOF slag must be less than 50 ram. 展开更多
关键词 titanium DESULFURIZATION RH refining ultra-low carbon steel Al-Si killed steel
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Stress Corrosion Cracking of Pressure Vessel Steel and Countermeasures by Titanium-Based & Cerium-Based Inhibitors in Subcritical Aqueous Environment
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作者 沈长斌 韩冬云 +1 位作者 杨怀玉 王福会 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第S1期1-4,共4页
An overview of a severe kind of environmentally-assisted cracking-stress corrosion cracking (SCC) of pressure vessel steel (PVS),such as stainless steel 304, alloy 600,690 and other nickel-based alloys in subcritical ... An overview of a severe kind of environmentally-assisted cracking-stress corrosion cracking (SCC) of pressure vessel steel (PVS),such as stainless steel 304, alloy 600,690 and other nickel-based alloys in subcritical (~300 ℃) aqueous environment was given. The mechanisms of SCC of metals under this inclement surrounding were briefly generalized. Herein,some pragmatic solutions to mitigate the SCC susceptibility and retard its propagation were presented. The titanium and cerium-based inhibitors addition countermeasure was highlighted. 展开更多
关键词 pressure vessel steel subcritical aqueous environment stress corrosion titanium & cerium-based inhibitors-addition rare earths
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添加中间层的TC2钛合金/321不锈钢真空扩散焊研究
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作者 曾欣 廖东波 +1 位作者 彭必友 刘晋 《精密成形工程》 北大核心 2024年第8期182-189,共8页
目的以Cu箔、Ni箔为中间层,使用真空扩散焊工艺实现TC2钛合金与321不锈钢的焊接。方法采用扫描电子显微镜、EDS能谱仪、X射线衍射仪、冲击韧性实验机、显微硬度计等仪器研究了焊接温度、典型中间层材料等工艺参数对TC2钛合金/321不锈钢... 目的以Cu箔、Ni箔为中间层,使用真空扩散焊工艺实现TC2钛合金与321不锈钢的焊接。方法采用扫描电子显微镜、EDS能谱仪、X射线衍射仪、冲击韧性实验机、显微硬度计等仪器研究了焊接温度、典型中间层材料等工艺参数对TC2钛合金/321不锈钢焊接界面微观结构、界面元素扩散、接头力学性能的影响规律。结果在添加中间层的扩散焊接头中,是否会形成界面区和扩散区以及界面区和扩散区的宽度,受焊接温度的影响,也受中间层和母材成分及性能的影响。在以Ni为中间层的TC2钛合金与321不锈钢真空扩散焊接头中,扩散区会产生AlNi_(3)、NiTi等新物相,当以Cu为中间层时,扩散区中会产生Cu_(0.81)Ni_(0.19)等新物相。在实验条件下,使用铜箔作为中间层的TC2钛合金与321不锈钢真空扩散焊接头的力学性能优于使用镍箔作为中间层的真空扩散焊接头的力学性能。结论在实验条件下,添加中间层的TC2钛合金/321不锈钢真空扩散焊的最佳工艺参数如下:真空度为10^(-4)Pa,焊接温度为820℃,焊接压力为15MPa,焊接时间(即保温时间)为90min,保压时间为240min,以Cu作为中间层。 展开更多
关键词 真空扩散焊 TC2钛合金 321不锈钢 中间层 微观组织 力学性能
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两种钛合金半穿甲战斗部侵彻单层钢靶性能试验研究
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作者 畅博 张帆 +2 位作者 彭军 全嘉林 张萌昭 《兵器装备工程学报》 CAS CSCD 北大核心 2024年第6期81-86,共6页
选取亚稳态β型TB17和高损伤容限α+β型TC4-DT两种高韧钛合金材料,对2种钛合金材料在高应变率条件下动态力学响应特性进行测试分析,并应用125 mm火炮发射装置开展2种钛合金半穿甲战斗部侵彻单层钢靶性能试验研究。结果表明,作为半穿甲... 选取亚稳态β型TB17和高损伤容限α+β型TC4-DT两种高韧钛合金材料,对2种钛合金材料在高应变率条件下动态力学响应特性进行测试分析,并应用125 mm火炮发射装置开展2种钛合金半穿甲战斗部侵彻单层钢靶性能试验研究。结果表明,作为半穿甲战斗部的壳体材料,应选择屈服强度与冲击韧性匹配性好的钛合金,其中更应关注钛合金材料的塑性变形能力和抗冲击韧性;随着侵彻着角的增加,侵彻单层钢靶过程弹体头部侵蚀量及径向墩粗程度更严重,不利于弹体保持侵彻强度及装药安定性。 展开更多
关键词 钛合金 半穿甲战斗部 单层钢靶 侵彻着角
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Ti_(43.76)Zr_(12.50)Cu_(37.49-x)Ni_(6.25)Co_(x)非晶钎料真空钎焊TC4钛合金/316L不锈钢 被引量:2
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作者 韩文倩 董红刚 +3 位作者 马月婷 李鹏 吴宝生 张亮亮 《焊接学报》 EI CAS CSCD 北大核心 2024年第1期47-57,I0006,共12页
根据双团簇模型设计并制备了Ti-Zr-Cu-Ni-Co系非晶钎料,用于真空钎焊TC4钛合金和316L不锈钢,分析了钎料中Co元素含量对钎焊接头界面微观组织形貌、力学性能及断裂行为的影响规律.结果表明,钎焊接头可划分为TC4/扩散区(Ⅰ区)/钎缝中心区... 根据双团簇模型设计并制备了Ti-Zr-Cu-Ni-Co系非晶钎料,用于真空钎焊TC4钛合金和316L不锈钢,分析了钎料中Co元素含量对钎焊接头界面微观组织形貌、力学性能及断裂行为的影响规律.结果表明,钎焊接头可划分为TC4/扩散区(Ⅰ区)/钎缝中心区(Ⅱ区)/界面区(Ⅲ区)/316L,界面典型微观组织结构为TC4/β-Ti+Ti_(2)Cu/(Ti,Zr)_(2)(Cu,Ni)+Ti_(2)Cu+Ti_(2)(Cu,Ni)+TiFe/(Fe,Cr)_(2)Ti+α-(Fe,Cr)+τ+γ-(Fe,Ni)+σ/316L,随着Co元素含量的增加,接头剪切强度先升高后降低再升高,当Co元素含量为1.56%时达到最大310 MPa,不添加Co元素时,接头断裂于钎缝中心区(Ⅱ区);当Co元素含量为1.56%~6.24%时,接头断裂于靠近316L母材的界面区(Ⅲ区)附近,断裂模式为典型的解理断裂. 展开更多
关键词 真空钎焊 非晶钎料 钛合金/不锈钢异种金属 微观组织 剪切强度
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