热处理工艺对钒微合金化冷轧TRIP钢组织性能影响研究

发布时间：2017-12-26 19:20

本文关键词：热处理工艺对钒微合金化冷轧TRIP钢组织性能影响研究　出处：《钢铁钒钛》2016年06期 　论文类型：期刊论文

【摘要】：采用盐浴热处理方法配合性能检测及显微组织分析方法研究了热处理工艺对含钒冷轧TRIP钢组织性能的影响,结果表明试验钢在所采用的热处理工艺下其抗拉强度均达到700 MPa,且在780℃×60 s+400℃×180 s工艺下获得最佳综合性能,屈服强度、抗拉强度、断后伸长率、强塑积分别为514 MPa、738 MPa、29%、21 402 MPa·%;随着两相区退火温度的升高,两相区奥氏体所占的体积分数也越高,使最终组织中贝氏体及马氏体等强化相含量增多,造成试验钢强度上升、塑性下降;钒在试验钢中对残余奥氏体的积极作用并未体现,可能与退火时间较短和贝氏体区等温时钒碳(氮)化物重新析出消耗残余奥氏体中碳原子造成其含量及稳定性下降有关。
[Abstract]:Using salt bath heat treatment method with the effects of heat treatment processes on Microstructure and properties of cold rolled TRIP steel containing vanadium performance testing and microstructure analysis, the result shows that the test steel in heat treatment process with the tensile strength reached 700 MPa, and the best performance at 780 DEG s+400 DEG C * 60 * 180 s process, yield strength, tensile strength, elongation and strength ductility were 514 MPa, 738 MPa, 29%, 21402 MPa -%; with increasing the annealing temperature of the two-phase region, the volume fraction of austenite phase region was also higher, so that the final organization bainite and martensite strengthening phase etc. the test content increased, the strength of steel increases, the ductility decreases; the positive role of vanadium in steel test on Residual Austenite Isothermal Annealing may not reflect, and for a short time and bainite region of vanadium carbon (nitrogen) of re precipitation residual consumption The carbon atoms in austenite are related to the decrease of the content and the stability of the austenite.
【作者单位】：攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室;
【分类号】：TG142.1;TG161
【正文快照】： 0引言相变诱发塑性钢(Transformation Induced Plas-ticity Steel,简称TRIP钢)由于存在6%~10%的亚稳奥氏体[1],能协调软相与硬相变形及亚稳奥氏体向马氏体转变提高成形性而成为当前汽车轻量化应用中重点研究的钢种之一。从低合金成本角度考虑TRIP钢,通常采用C-Si-Mn成分体系[2

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