摘要
含有较高含量的细化晶粒元素(V、Ti、Nb)的低合金高强度结构钢大截面锻件,在进行正回火、调质处理后均出现了低温(-20℃)冲击功远低于要求值的现象。通过分析,对现有不合格锻件进行了亚温等温退火的热处理工艺挽救,全部合格。同时在后序的投料时,通过化学成分优化,使该类材质完全满足技术要求。
The impact energy value at low temperature （ - 20℃ ） of the large cross section of low alloy high strength structural steel forgings with high contents of grain refinement elements V,Ti,Nb is much less than the required value after normalizing ＆ tempering and quenching ＆ tempering. Through analysis, after the existing unqualified forg- ings have been ealTied out intereritieal isothermal annealing process, all the forgings meet the requirements. In the sub- sequent feeding, through the optimization of ehenfieal composition, the material has completely met the technical re- quirements.
作者
冯敬
姜国建
郭建
张丹
Feng Jing;Jiang Guojian;Guo Jian;Zhang Dan
出处
《大型铸锻件》
2018年第4期14-16,共3页
Heavy Casting and Forging
关键词
低合金结构钢锻件
冲击功
亚温等温退火
low alloy structural steel forgings
impact energy
intercritieal isothermal annealing
