淬火&碳分配工艺对27SiMn钢的力学性能和显微组织影响  

Study on quenching & partitioning heat treatment for mechanical properties and microstructure of steel 27SiMn

作　　者：钟瑶瑶 陈思思[1] 韩先洪[1] 

机构地区：[1]上海交通大学模具CAD国家工程研究中心,上海200030

出　　处：《塑性工程学报》2015年第6期124-129,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51105247)

摘　　要：热冲压工艺能够使材料获得高达1 500MPa的抗拉强度,但是得到的制件塑性较差。将传统热冲压技术与淬火&碳分配工艺(Q&P热冲压工艺)相结合,可有效提高热冲压零件的强塑积。将Q&P热冲压工艺应用于无硼富硅钢27SiMn,进行全马氏体转变和Q&P热模拟试验,通过拉伸试验、显微组织观察等方法,研究了淬火温度和碳分配时间对27SiMn钢力学性能和显微组织的影响。研究表明,Q&P热冲压工艺对于27SiMn钢,在保证制件具有超高强度的同时,可显著提高其延伸率,从而获得优异的综合力学性能。The strength of steel after hot stamping process reaches 1500 MPa,but the elongation of the final part is limited.In order to improve the product of strength and elongation of hot stamping part,the hot stamping technology was integrated with quenching ＆ partitioning（Q＆P）process.In this paper,the presented Q＆P hot stamping process was initially applied to the steel 27 SiMn with high content of element Si and without element B.The influences of different partitioning time and quenching temperature on the mechanical properties and microstructure of 27 SiMn during one-step treatment were discussed through a series of thermal simulation experiments and the following tensile tests and microstructure observations.The experimental results show that the integrating Q＆P process with hot stamping technology of steel 27 SiMn can improve elongation effectively as maintaining high-strength,and lead to better overall mechanical properties.

关 键 词：热冲压 淬火-碳分配 27SIMN钢 强塑积 

分 类 号：TG142.7[一般工业技术—材料科学与工程]