BSW T15钢的真空热处理

Vacuum heat treatment process of BSW T15 steel

利用真空淬火回火设备、洛氏硬度计及扫描电镜,研究了淬火温度和回火温度对BSW T15钢真空高温淬火后性能的影响,并分析了BSW T15钢高温淬火时开裂的原因。结果表明,淬火温度从1200℃降低10℃后,表面硬度保持在62.5~64.5 HRC范围内,畸变量减小且有效防止了淬火开裂;采用合适的回火温度、合理的工装方式及优化的工艺,畸变量降低至0.15 mm,BSW T15钢的热处理工艺指标均满足工艺要求。

Effects of quenching temperature and tempering temperature on the properties of BSW T15 steel after vacuum high temperature quenching were studied by means of vacuum quenching and tempering equipment,Rockwell hardness tester and scanning electron microscope,and the cracking reason of the BSW T15 steel during high temperature quenching was analyzed.The results show that the surface hardness is kept in the range of 62.5-64.5 HRC by reducing the quenching temperature by 10℃from 1200℃,and the distortion variable is reduced and the quenching cracking is effectively prevented;the distortion variable is reduced to 0.15 mm by adopting appropriate tempering temperature,reasonable tooling and optimized process,and the heat treatment process indexes of the BSW T15 steel meet the process requirements.