摘要
研究了“零保温”淬火状态下,25MnV钢的显微组织和力学性能,分析了马氏体的形态及转变特点。结果表明,在830～910℃,该钢的强硬性随淬火温度的增加而提高,910℃淬火达到最高值。淬火温度高于880℃后,“零保温”淬火的性能优于传统的保温淬火。25MnV钢“零保温”淬火得到极细的板条状马氏体组织,其原因与奥氏体晶粒的细化和奥氏体中碳浓度分布不均匀有关。
The microstructure and mechanical properties of 25MnV steel by quenching with zero-time holding were studied, the martensite shape and transformation characteristics of the steel were analyzed.The experiment results show that, in the range of 830-910℃, the strength and hardness of 25MnV steel raise along with quenching temperature going up, the best strength and hardness can be obtained by quenching at 910℃ . When quenching temperature is higher than 880℃,the properties of the steel by quenching for zero-time holding are better than those by tradition quenching. The microstructure of the steel is the fmer lath martensite after zero time holding quenching, the reasons relate to the fined austenite crystalline grain and the non-uniform density of carbon in austenite.
出处
《热加工工艺》
CSCD
北大核心
2007年第6期36-38,共3页
Hot Working Technology
基金
河南省自然科学基金资助项目(0511052600)
