摘要
利用CCT曲线、金相观察和V(C,N)的固溶度积计算,研究了8.8级耐候螺栓在不同工艺条件下的淬透性。结果显示,在钢中加入适量钒元素,并提高淬火温度,可有效提高奥氏体固溶钒的含量,形成奥氏体晶界偏聚,降低奥氏体晶界能,提高淬透性。并且根据不同温度时耐候螺栓用钢棒材中心硬度值,确定了获取良好淬透性的最优淬火温度,为开发低碳含量的8.8级耐候螺栓用钢提供了思路。
The hardenability of grade 8.8 weather resistant bolt under different process conditions was studied by using CCT curve,metallographic observation and calculation of solid solubility product of V(C,N).The results show that through adding appropriate vanadium into the steel and increasing the quenching temperature,the content of austenite solid solution vanadium can be effectively increased and the austenite grain boundary segregation can be formed,which reduced the austenite grain boundary energy and improved the hardenability.The optimum quenching temperature for obtaining good hardenability is determined by using the central hardness value of bar for weather bolt at different temperatures,which provides an idea for developing grade 8.8 weather bolt steel with low carbon content.
作者
赵海涛
孙剑
陈红卫
田志强
刘毅
白丽娟
Zhao Haitao;Sun Jian;Chen Hongwei;Tian Zhiqiang;Liu Yi;Bai Lijuan(HBIS Group Research Institute, Shijiazhuang 050023, Hebei)
出处
《河北冶金》
2021年第10期29-32,45,共5页
Hebei Metallurgy
基金
河北省自然科学基金钢铁联合基金(E2019318013)。
关键词
耐候螺栓
淬透性
钒
奥氏体
晶界
淬火温度
weather resistant bolt
hardenability
vanadium
austenite
grain boundary
quenching temperature
