Q&P钢微观组织及力学性能试验研究  

Experimental study on microstructure and mechanical properties of Q&P steels

作　　者：韩飞[1] 杨亚辉[1] 

机构地区：[1]北方工业大学机械与材料工程学院,北京100144

出　　处：《塑性工程学报》2016年第2期103-108,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50905001);国家自然科学基金和上海宝钢集团公司联合资助项目(51074204);北京市自然科学基金资助项目(3112010)

摘　　要：以先进高强钢Q&P钢为对象,研究其微观组织结构及力学性能。对试样进行了单向拉伸试验,对不同材料的拉伸断口进行了SEM分析,并对不同变形程度的试样进行了XRD分析。结果表明,Q&P钢的硬化指数n值较高,硬化行为明显,相比DP钢、MS钢具有较好的塑性成形能力;Q&P钢属于韧性断裂,韧窝较大较深,塑性性能优于DP钢和MS钢;Q&P钢中的残余奥氏体体积转化率与应变大小和应变率相关。The microstructure and mechanical properties of quenching and partitioning （Q＆P） steels, one of the advanced high strength steels, are studied in this paper. The static uniaxial tensile test, SEM analysis and XRD analysis are conducted for dif- ferent materials under different degrees of deformation. The tensile test shows that, compared to DP steel an MS steel, Q＆P steels has higher n value and significantly hardening behavior, and the formability is higher. SEM analysis shows that the fracture behavior for Q＆P steels is ductile, the dimple is much bigger and deeper and the plastic properties is better compared with DP steels and MS steels. X-Ray Diffraction test shows that the transformation rate of residual austenite is not only related with the degree of strain but also the strain rate.

关 键 词：Q&P钢 力学性能 成形性能 相变强化 硬化行为 

分 类 号：TG386.41[金属学及工艺—金属压力加工]