摘要
针对首批试制的18CrNiMo7-6高铁齿轮钢坯晶粒度及端淬试验硬度值无法满足技术要求的情况,通过优化材料C、Mn化学成分内控设计,增加Al、N含量,并制定合理的冶炼、模铸、锻造、热处理工艺,成功开发出高铁齿轮18CrNiMo7-6锻坯。结果表明:成分和生产工艺优化后的18CrNiMo7-6高铁齿轮钢坯奥氏体晶粒度评级为7.0级,且无混晶出现;端淬性能从距离淬火端40 mm内硬度值逐渐减小,尤其J20后变化明显,解决了首批试制的高铁齿轮钢端淬性能超标的问题;淬火+低温回火后力学性能指标也满足技术要求,且富余量明显。
Aiming at the situation that the grain size and end quenching hardness of the first batch of 18CrNiMo7-6 high-speed gear billet failed to meet the technical requirements,by optimizing the internal control design of the chemical composition of materials C and Mn,adding the content of Al and N,and developing reasonable smelting,die casting,forging and heat treatment processes,the high-speed gear 18CrNiMo7-6 forging billet was successfully developed.The results show that the austenite grain size of 18CrNiMo7-6 high-speed iron gear billet with optimized composition and production process is 7.0,and there is no mixed crystal.The end quench performance gradually decreases within 40mm from the quenched end,especially after J20,which solves the problem that the end quench performance of the first batch of high speed gear steels exceeds the standard.After quenching and low temperature tempering,the mechanical properties also meet the technical requirements and the surplus is obvious.
作者
王之香
南海
张锦文
Wang Zhixiang;Nan Hai;Zhang Jinwen(Technology Center,Shangxi Taigang Stainless Steel Co.,Ltd.,Taiyuan Shanxi 030003)
出处
《山西冶金》
CAS
2023年第2期1-3,共3页
Shanxi Metallurgy
基金
山西省重点研发计划项目(201903D111008)——高铁齿轮钢产品关键生产工艺技术开发及应用。
