奥氏体化温度对二次硬化渗碳钢组织与力学性能的影响
发布时间：2018-11-26 19:36
【摘要】：借助OM、SEM及X-ray萃取相分析技术,研究了奥氏体化温度对一种新型二次硬化渗碳钢C61的组织与力学性能的影响。结果表明:当奥氏体化温度较低时,钢中存在M_6C、M_(23)C_6、Nb(C,N)未溶相,随着奥氏体化温度的升高,碳化物逐渐溶解,在950℃时,钢中仅有少量Nb(C,N)残留;当奥氏体化温度大于1000℃时,C61钢奥氏体晶粒明显粗化,抗拉强度、屈服强度、冲击韧性大幅降低,晶粒粗化温度为1000℃;C61钢最佳奥氏体化温度为950℃,此时钢的抗拉强度为1625 MPa,屈服强度为1556 MPa,冲击吸收能量为82 J。
[Abstract]:The effect of austenitizing temperature on the microstructure and mechanical properties of a new secondary hardening Carburizing steel C61 was studied by means of OM,SEM and X-ray extraction phase analysis techniques. The results show that when the austenitizing temperature is low, there is an insoluble phase M _ S _ 6C _ (23) C _ (23) C _ 6N _ b (Con _ N) in the steel. With the increase of austenitizing temperature, the carbides dissolve gradually and dissolve at 950 鈩，
本文编号：2359434
[Abstract]:The effect of austenitizing temperature on the microstructure and mechanical properties of a new secondary hardening Carburizing steel C61 was studied by means of OM,SEM and X-ray extraction phase analysis techniques. The results show that when the austenitizing temperature is low, there is an insoluble phase M _ S _ 6C _ (23) C _ (23) C _ 6N _ b (Con _ N) in the steel. With the increase of austenitizing temperature, the carbides dissolve gradually and dissolve at 950 鈩，
本文编号：2359434
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