摘要
研究了不同冷却速度下的35SiMnMo中空钢的显微组织和硬度的变化,并将计算机模拟结果与试验结果进行了对比分析。结果表明,随着冷却速度的增加,35SiMnMo中空钢中的特殊上贝氏体组织的体积分数有不断减少的趋势,而块状复合结构的体积分数有不断增加的趋势;计算机模拟得到的不同冷却速度下的特殊上贝氏体相和块状复合相的体积分数与热模拟试验得到的结果具有较好的一致性;线性拟合得到的35SiMnMo中空钢的硬度与冷却速度关系式H=24.76+14.2 V,关系式的方差为0.97,表明计算机模拟得到的硬度与热模拟试验得到的硬度值基本一致。
Continuous cooling process of 35SiMnMo hollow steel was simulated and experimental verificated, the hardness and microstructure change of 35SiMnMo hollow steel under different cooling rates were studied. The results show that, with the increase of cooling rate, the volume fraction of special upper bainite has a decreasing trend, and the volume fraction of the bulk composite structure has a trend of increasing; the volume fraction of special bainite phase and bulk composite phase simulated by computer under different cooling rates has good consistency with thermal simulation test results; the formula obtained from a linear fit of 35SiMnMo hollow steel hardness and cooling velocity is H=24.76＋14.2 V, the formula＇s variance is 0.97. It is indicated that the hardness obtained by computer simulation is basically the same as that obtained by thermal simulation.
出处
《铸造技术》
CAS
北大核心
2016年第12期2548-2552,共5页
Foundry Technology
