摘要
采用光学轮廓仪、光学显微镜以及扫描电镜研究了晶粒度对镜面塑料模具钢力学性能、抛光性能和腐蚀性能的影响。结果显示,晶粒度为6级时的XPM钢具有良好的强韧性配合,抗拉强度为1250 MPa,断面收缩率为24.5%,伸长率为20.2%,冲击吸收能量为24.8 J;XPM钢各晶粒度级别的R_a值均在4～8 nm之间;随着晶粒度级别的增大,腐蚀速率逐渐减小。
Effect of grain size on mechanical properties,polishing performance and corrosion resistance of the mirror plastic mould steel was studied by optical profiler,optical microscope and scanning electron microscopy,respectively. The results show that the chemical composition optimized XPM steel has good combination of strength and toughness i. e. tensile strength 1250 MPa,section shrinkage rate 24. 5%,the elongation 20. 2%,and impact absorbing energy 24. 8 J,when the grain size is grade 6. The R_a values of XPM mirror plastic mould steel is between the 5-6 nm. With the increase of the number of grain size grade the corrosion rate gradually decreases.
作者
管爱琴
Guan Aiqin(Nantong Industry and Trade Technician College, Nantong Jiangsu 226010, China)
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第10期117-122,共6页
Heat Treatment of Metals
关键词
抛光
晶粒度
腐蚀性能
力学性能
polishing
grain size
corrosion resistance
mechanical properties
