朱小星,王宝雨,付晓斌

• 1:北京科技大学机械工程学院

摘要(Abstract)：

通过金相实验法研究了齿轮钢SAE8620H在950~1150℃、保温时间0~80 min之间奥氏体晶粒的长大规律,并利用Beck、Hillert、Sellars数学模型建立了其奥氏体晶粒长大模型。结果表明:SAE8620H钢奥氏体晶粒尺寸随温度升高逐渐增大,随保温时间延长而增大,在1050℃以上晶粒粗化。通过对3种晶粒长大模型的对比分析,Sellars模型对SAE8620H齿轮钢奥氏体晶粒长大预测精度最高,其晶粒长大激活能为Q=376869.353 J/mol,与根据成分计算出的Q值误差很小,建立了其奥氏体晶粒长大Sellars模型。

关键词(KeyWords)： 齿轮钢SAE8620H;奥氏体;晶粒长大;模型;激活能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51375042)

作者(Author): 朱小星,王宝雨,付晓斌

DOI: 10.13289/j.issn.1009-6264.2015.s2.044

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