摘要
在Gleeble-3500热模拟实验机上对lCrl8Ni9Ti和0Crl8Ni9奥氏体不锈钢分别在500-850匸以0.01、0.1 Js-'的应变速率进行高温拉伸实验。通过分析应力-应变曲线、断口附近组织,研究了温度和应变速率对实验钢力学性能的影响。结果表明:在500,550°C时两种实验钢在应变速率为0.1 s'1时的强度和伸长率均高于1 s'1时的;当温度由600°C升至750°C时,两种实验钢强度和伸长率随应变速率的减小而减小;0Crl8Ni9钢所需再结晶驱动力小于lCrl8Ni9Ti钢的;随着变形温度的升高和变形速率的降低,两种实验钢的晶粒都明显增大。
The high temperature tensile test of lCrl8Ni9Ti and 0Crl8Ni9 austenitic stainless steels at strain rate of 0.01,0.1, 1 s'1 and temperature range of 500-850 °C were done by Gleeble-3500 thermal simulation testing machine. The influencesof temperature and strain rate on the mechanical properties of experimental steel were studied by analyzing stress-strain curveand the microstructure near the fracture surface. The results show that when the strain rate is 0.1 s 'the strength and elongationof the two tested steels at 500 °C and 550 °C are higher than those at Is'1. The strength and elongation of the two tested steelsdecrease with the decrease of strain rate when the temperature increases from 600 °C to 750 °C. The recrystallization drivingforce of 0Crl8Ni9 steel is less than that of lCrl8Ni9Ti steel. With the increase of deformation temperature and the decrease ofstrain rate, the grain in the two tested steels grows up obviously.
作者
王鑫田
武会宾
刘贺
牛刚
顾洋
王超
WANG Xintian;WU Huibin;LIU He;NIU Gang;GU Yang;WANG Chao(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;Third Workshop,Capital Aerospace Machinery Limited,Beijing 100076,China)
出处
《热加工工艺》
北大核心
2019年第22期31-34,共4页
Hot Working Technology
基金
国家重点研发计划重点专项(2017YFB0304900)
关键词
热变形
奥氏体不锈钢
再结晶
thermal deformation
austenitic stainless steel
recrystallization
