Research on On-line Pre-hardening Process of 718H Die Steel
New on-line pre-hardening (OPH) equipment for quenching die steel has been developed by University of Science and Technology Beijing and Dongbei Special Steel Group in Dalian Special Steel Co.,LTD.OPH consists of strong cooling water jet,medium cooling water jet,weak cooling water jet,air-water spray and side water jet and has flexible cooling and control ability.Based on the equipment,online quenching process of 718H die steel was performed by numerical simulation and production experiment.The result of temperature field by numerical simulation agrees well with experiment result,which can prove that numerical simulation can be a very good guidance for production experiment.Experimental tempering metallographie structure of the whole 718H plate is tempered troostite and sorbite and the tempering hardness difference of 718H die steel can be controlled within 2 HRC in the whole plate under on-line pre-hardening process by numerical simulation.The prediction technology of numerical simulation can meet the different cooling rate control and make quenching process comply with preset quenching route to guarantee material microstructure and performance.
Die steel Quenching On-line pre-hardening Temperature field Numerical simulation
Guoyong Liu Dongmei Zhu Shaojun Zhang Mou-wei Li Shi-chuang Gong
School of Mechanical Engineering,University of Science and Technology Beijing,Beijing,100083,China Dalian Special Steel Co.,LTD,Dalian 116105,China
国际会议
武汉
英文
583-588
2013-06-15（万方平台首次上网日期，不代表论文的发表时间）