摘要
对Ti-3Al-4.5V-5Mo(TC16)钛合金丝材试样进行金相组织观察,开展试验考察固溶时效热处理对TC16钛合金丝材微观组织与力学性能(拉伸性能、冲击性能)的影响。研究发现:1)丝材经固溶热处理后,组织中存在大量初生α相、亚稳态β相、α″相,随着固溶温度升高,初生α相含量降低,直至完全消失,并形成更多α″相;经时效热处理后,丝材中出现β相转变组织,初生α相形貌与尺寸变化较小。2)在固溶条件下,丝材抗拉强度随着温度升高而降低,而塑性随着温度升高变化较小;经时效热处理后,丝材强度增大,塑性值减小,其中抗拉强度最大值为1280 MPa,屈服强度最大值为1182 MPa,断后延伸率最大值为25%,断面收缩率最大值为58%。3)在固溶条件下,丝材冲击韧性与冲击吸收功均随着温度升高而增大;经时效热处理后,冲击韧性与冲击吸收功均减小,其中最大冲击韧性为89 J/cm^(2),最大冲击吸收功为36 J。
The wire materials of metallographic microstructure of Ti-3Al-4.5V-5Mo(TC16)titanium alloy were observed,and the effects of solution aging heat treatment on the microstructure and mechanical properties(tensile properties and impact properties)of TC16 titanium alloy were investigated.Findings:1)After solution heat treatment,there are a large number of primaryα-phases,metastableβ-phases andα″-phases in the microstructure of the wire materials.With the increase of solution temperature,the content of primaryα-phases decreases until it disappears completely,and moreα″-phases are formed.After aging heat treatment,transformation structure ofβ-phases appears in the wire materials,and the morphology and size of primaryα-phases changed little.2)Under the condition of solid solution,the tensile strength of wire materials decreases with the increase of temperature,but the plasticity changes little with the increase of temperature.After aging heat treatment,the strength of the wire materials increases and the plasticity decreases,among which the maximum tensile strength is 1280 MPa,the maximum yield strength is 1182 MPa,the maximum elongation after fracture is 25%,and the maximum area shrinkage is 58%.3)Under the condition of solid solution,the impact toughness and impact absorption energy of the wire materials increase with the increase of temperature.After aging heat treatment,the impact toughness and impact absorption energy both decrease,with the maximum impact toughness of 89 J/cm^(2) and the maximum impact absorption energy of 36 J.
作者
同晓乐
张明玉
岳旭
杨斌
王玉佳
阿热达克·阿力玛斯
TONG Xiaole;ZHANG Mingyu;YUE Xu;YANG Bin;WANG Yujia;ARDAK Almas(Xinjiang Xiangrun New Materials Technology Co.,Ltd.,Hami 839000,China;Engineering Research Center of Continuous Extrusion,Dalian Jiaotong University,Dalian 116028,China;Xinjiang Key Laboratory of Titanium-based New Materials,Hami 839000,China)
出处
《工业技术创新》
2022年第3期1-6,共6页
Industrial Technology Innovation
基金
自治区创新环境(人才、基地)建设专项—天山创新团队计划项目(2020D14041)
2021年度自治区创新环境(人才、基地)建设专项(XJQY2009)。
关键词
TC16钛合金
金相组织
拉伸性能
冲击性能
固溶时效热处理
TC16 Titanium Alloy
Metallographic Structure
Tensile Properties
Impact Properties
Solution Aging Heat Treatment
