热冲压成形新型B钢开发与工艺研究  

New boron steel development and process research of hot stamping

作　　者：宋磊峰[1] 马鸣图[1] 张宜生[2] 易红亮[3] 郭怡晖[1] 

机构地区：[1]中国汽车工程研究院股份有限公司,重庆400039 [2]华中科技大学材料成形及模具技术国家重点实验室,武汉430074 [3]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819

出　　处：《中国工程科学》2014年第1期71-75,共5页Strategic Study of CAE

基　　金：国家科技支撑计划(2011BAG03B02)

摘　　要：在传统22MnB5成分基础上添加Cr、Mo等化学元素,开发出热冲压专用新钢种22MnMoB材料,并通过金相显微镜、显微硬度计、电子拉伸试验机等设备对22MnMoB材料进行材料性能、材料连续冷却转变曲线(CCT)、热处理工艺性能测试,通过中试线、热冲压模具等设备测试材料的工艺参数、试制热冲压零件并测试零件性能。试制结果显示,新开发的22MnMoB材料具有良好的抗短时高温氧化性能、成形淬火后材料组织细小、强度级别与原有22MnB5相当,但总延伸率大大提高。Based on the 22MnB5’s composition,new boron steel applied on hot stamping was developed by adding some special chemical elements,such as adding Cr,Mo. Materials properties , materials continuous cooling transformation curves（CCT） and heat-treatment properties of new boron steel were tested by metallographic microscope、micro-hardness and electronic tensile testing machines. Process parameters testing ,parts production and part properties analysis were also finished by the middle production line and some other testing equipments. Tests result show that the new boron steel owned great oxidation resistance properties and fine microstructure,the new boron steel and 22MnB5 materials have the same strength levels,but new boron steel have better elongation than 22MnB5.

关 键 词：热冲压 硼钢 成分 抗氧化 

分 类 号：TG306[金属学及工艺—金属压力加工]