第41卷第2期 Vol. 41No.2
++++++++ +理论与实验研究
压救术饭
FORGING & STAMPING TECHNOLOGY
316L不锈钢压缩热变形行为及临界损伤值研究
刘光辉，刘华，王伟钦，张义帅
（郑州机械研究所，河南郑州450001）
2016年2月 Feb.2016
摘要：Deform-3D材料库中材料的力学性能与实际生产差别较大，直接利用其性能参数进行模拟，误差较大。利用实验数据进行模拟，可以使模拟结果更加准确和接近生产。采用Gleeble-1500D热模拟实验机对316L不锈钢进行高温压缩实验，分析了温度和应变速率对316L不锈钢高湿力学性能的影响。并分别利用材料库中316L不锈钢力学性能数据和实验数据进行了压缩热变形模拟，分析了两种情况下的行程-载荷曲线和应力分布云图，并根据实验数据的模拟结果分析了316L不锈钢的临界损伤值。结果表明：应变速率一定时，热变形抗力随变形湿度升高而降低；变形温度一定时，热变形抗力随应变速率增加而增大。应变速率为0.25s-"时，316L不锈钢的临界损伤值在0.1604-0.2369之间。
关键词：316L不锈钢；Deform-3D；压缩热变形；临界损伤值 DOI; 10. 13330/j. issn. 1000-3940. 2016. 02. 023
中图分类号：TG314.3
文献标识码：A
文章编号：1000-3940（2016）02-0118-06
Studyoncompressedthermaldeformationbehaviorandcritical
damage value of stainless steel316L Liu Guanghui, Liu Hua, Wang Weiqin, Zhang Yishuai
( Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450001 , China)
Abstract : The mecheanical properties of materials in Deform 3D material library are quite different from that in actual production. A big error will occur when the mechanical properties were applied directly to the simulation. Aceording to the experimental data, simulation was realized, the results would be more accurate and closer to production. For stainless steel 316L, the compress test at high temperature was carried out by Gleeble 1500D simulation testing machine. The influences of temperature and strain rate on the mechanical properties of stainless steel 316L at high temperature were analyzed. The thermal compression process of stainless steel 316L was simulated by the me-chanical properties data in material library and the experimental data respectively. Under the two cases, the stroke load curves and stress distributions were analyzed, and the critical damage values of stainless steel 316L were analyzed according to the experimental data. The results show that the thermal deformation resistance decreases with the increase of deformation temperature at a constant of strain rate, and the deformation resistance increases with the increase of strain rate at a constant of deformation temperature. Furthermore, the critical
damage value of stainless steel 316L with strain rate of 0. 25 s-1 is within the range of 0. 1604 0. 2369. Key words : stainless steel 316L; Defom 3D; compressed themal defomation; critical damage value
随着科学技术的发展，不锈钢在机械制造领域收稿日期：20150720；修订日期：20151020
基金项目：科技部科研院所技术开发研究专项资助项目“汽车转
向螺母多向联动精确成形及设备"（2013EC119106）作者简介：刘光辉（1989-），男，额土研究生 E-mail: liu0406gh@ 163. com
通讯作者：刘华（1962-），男，博士，博士生导师，研究员 E-mail: 13903832971@ 163. cor
Yu R P, Si C L. Design on multi-position progressive die of shell base [J]- Forging & Stamping Technology, 2014, 39 (12 ) : 97 100
蒙以媒。副仪表板本体后安装支架多工位级进模设计【]
［10】
得到越来越广泛的应用[]。316L不锈钢属于Cr-Ni 系奥氏体不锈钢，以其优良的耐腐蚀性、冲击韧性及高温力学性能，被广泛用于石油天然气管道阀门、航空航天用高温螺栓等[2)。316L不锈钢加热过程中无相变，无法通过热处理进行强化，锻造成为该材料强化的重要途径[3]。
但是该材料锻造温度范围
窄、变形抗力大[4]，研究其在高温下的变形行为对
锻压技术，2014，39(2)：118122
Meng Y C. Design of multi-position progressive die of installing bracket behind accessory instrument panel ontology [J]. Forging & Stamping Technologr, 2014, 39 (2) : 118 122.