摘要
为了研究P在超级铁素体不锈钢中的作用,基于S44660钢成分,调整了P的质量分数,控制P含量分别为0.004%、0.009%、0.033%以及0.055%4种试验钢,研究P含量的变化对铸造S44660超级铁素体不锈钢组织与力学性能的影响。结果表明:在P含量(质量分数)为0.004%、0.009%和0.033%时,P含量增加可以扩大S44660超级铁素体不锈钢的结晶温度范围(ΔT),减小晶粒尺寸并提升等轴晶率,但当P含量为0.055%时,晶粒尺寸反而增大,等轴晶率下降;适量的P可以提高材料的室温拉伸性能以及硬度;P对材料冲击韧性具有双重作用,一方面P对晶粒有细化作用,进而提升材料的冲击吸收功;另一方面,过量的P会促使其在晶界处偏聚,进而影响材料的韧性。
In order to study the role of P in super ferritic stainless steel,based on the composition of S44660 steel,the mass fraction of P was adjusted,and the P content was controlled as 0.004wt%,0.009wt%,0.033wt%and 0.055wt%.The effect of P content change on the microstructure and mechanical properties of cast S44660 super ferritic stainless steel was studied.The results show that P can expand the crystallization temperature range(ΔT),reduce the grain size and increase the equiaxed crystal rate when the P content is 0.009wt%and 0.033wt%.But when the P content is 0.055wt%,the grain size increases and the equiaxed crystal rate decreases.The appropriate amount of P can improve the room temperature tensile properties and hardness of the material.P has a dual effect on the impact toughness of the material.On the one hand,P has a refinement effect on the grain,thereby improving the impact absorption work of the material;on the other hand,excess P will promote its deflection at grain boundaries,which in turn affects the toughness of the material.
作者
刘子枫
解志文
宁礼奎
肖传民
刘恩泽
谭政
佟健
李海英
王增睿
徐忻垚
郑志
Liu Zifeng;Xie Zhiwen;Ning Likui;Xiao Chuanmin;Liu Enze;Tan Zheng;Tong Jian;Li Haiying;Wang Zengrui;Xu Xinyao;Zheng Zhi(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan 114051,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Third Military Representative Room in Shenyang Area Air Force Equipment,Shenyang 110016,China;Shenyang Foundry Research Institute Co.,Ltd,Shenyang 110016,China;Queen Mary College of Engineering,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第9期2588-2595,共8页
Rare Metal Materials and Engineering
基金
辽宁省科技攻关计划(2019JH2/10100009)。
关键词
S44660超级铁素体不锈钢
铸造
凝固
力学性能
S44660 super ferritic stainless steel
foundry
solidification
mechanical properties
