零保温热处理温度对27SiMn钢组织性能的影响

Effect of heating temperature on microstructure and property of 27SiMn steel in zero time holding heat-treatment

采用正交组合回归设计实验方法,研究了零保温条件下淬火和回火温度对27SiMn钢强度和硬度的影响规律,并进行了显微组织分析.实验表明,27SiMn钢零保温淬火后得到极细的板条状马氏体组织.900℃零保温淬火,强度、硬度超过880℃常规淬火,其原因与奥氏体晶粒细化和奥氏体中碳浓度分布不均匀有关.

The effect regularity of quenching and tempering temperature on 27SiMn steel has property in zero time holding heat treatment was researched by the orthogonal regressive principle Microstructure is analyzed Experiment results show that 27SiMn steel has extreme fine lath martensite while zero time holding quenching The 27SiMn steel's strength and hardness are higher in 900 ℃ zero time holding quenching than that in 880 ℃ tradition quenching, the reasons are the fined austenite crystalline grain and the non uniform density of carbon in austenite