马斌,李平,梁强,刘新

• 1:重庆工商大学机械工程学院
• 2:重庆大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-3500热模拟试验机在873～1023 K的变形温度、0.01～10 s~(-1)的应变速率下对HNi55-7-4-2镍黄铜合金进行等温热压缩实验,获得了该合金的真实应力-应变曲线,分析热压缩过程中摩擦和温升效应对其流变应力的影响,修正了流变应力曲线。基于修正的应力-应变数据,分别采用考虑应变补偿的修正Arrhenius(M-Arrhenius)模型和修正Zerilli-Armstrong(M-ZA)模型构建了合金的本构模型,对比分析了两种模型的拟合精度。结果表明:M-ZA模型的相关系数和平均绝对误差分别为0.997和4.21%,其预测精度优于M-Arrhenius本构模型(0.991, 6.68%)。将该模型应用于某齿环热精锻成形进行数值模拟,模拟结果与实际生产结果吻合,为HNi55-7-4-2镍黄铜合金高温塑性成形数值模拟提供了准确的材料模型。

关键词(KeyWords)： HNi55-7-4-2合金;流变应力;修正Arrhenius模型;修正Zerilli-Armstrong模型;齿环

Abstract:

Keywords:

基金项目(Foundation): 重庆市基础科学与前沿技术研究基金(cstc2017jcyjAX0175);; 重庆市教育委员会科学技术研究项目(KJQN201900836)

作者(Author): 马斌,李平,梁强,刘新

DOI: 10.13289/j.issn.1009-6264.2020-0187

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