摘要
采用XRD、SEM、残余应力测试仪、维氏硬度计、测长机等手段对合金物相、微观组织、残余应力、硬度、线膨胀率进行表征,研究自然时效对GT35合金组织与性能的影响。结果表明,GT35合金在自然时效过程中,增强相Ti C的形貌与粒径没有明显变化。当自然时效时间小于15天时,GT35合金的硬度、残余应力与线膨胀率逐渐增加,随后逐渐减小并趋于稳定。当自然时效超过90天后,GT35合金的组织与性能趋于稳定,其硬度、残余应力和线膨胀率分别为945. 7 HV5、-184 MPa和-2. 22×10-5。
The influence of the natural aging process on the microstructure and performance of GT35 alloy was studied by characterizing the alloy phases,microstructure,residual stress,Vickers hardness and linear expansion rate via XRD,SEM,i XRD,Vickers hardness tester and lengthmeasuring machine. The results show that the Ti C particle morphology and size have no obvious changes during the natural aging process.The Vickers hardness,residual stress and linear expansion rate of the GT35 alloy increase gradually when the natural aging time is less than 15 days,while they decrease when exceeding 15 days. The microstructure and performance are stable after natural aging for more than 90 days,and the Vickers hardness,residual stress and linear expansion rate is 945. 7 HV5,-184 MPa,and -2. 22 × 10-5,respectively.
作者
肖来荣
韦道明
赵小军
蔡圳阳
朴晟铭
Xiao Lairong;Wei Daoming;Zhao Xiaojun;Cai Zhenyang;Piao Shengming(School of Materials Science and Engineering,Central South University,Changsha Hunan 410083,China;Key Laboratory of Non-ferrous Materials Science and Engineering,Ministry of Education,Changsha Hunan 410083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第1期65-69,共5页
Heat Treatment of Metals
基金
国家自然科学基金(U1637210)
中南大学创新驱动项目(51271203)
关键词
GT35合金
自然时效
组织
性能
稳定性
GT35 alloy
natural aging
microstructure
properties
stability
