40Cr汽车冲压模具热处理工艺研究
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摘要
目前汽车冲压模具在材料处理时大多采用传统热处理工艺,经常造成汽车冲压模具的冷冲效率低和使用寿命短,严重影响了汽车生产制造的品质和效率。对此,文章提出了40Cr的汽车冲压模具热处理工艺,分析了冲压模具热处理工艺及参数,采用了40Cr钢的4个试件做对比,即第一件为传统热处理试件;第二件为文章热处理试件;第三件为传统改进热处理试件;最后一件为初始试件。观测它们的金相组织结构,测试各自试件的硬度。实验结果表明:文章热处理工艺试件硬度最高,变形量最小,热处理后的金相组织马氏体较多,更具耐磨性能。
At present, the traditional heat treatment process of automobile stamping die is mostly used in the process of material processing. It often causes low cooling efficiency and short service life of automobile stamping die, which seriously affects the quality and efficiency of automobile manufacturing. This paper puts forward the heat treatment process of 40 Cr ' s automobile stamping die, analyzes the heat treatment process and parameters of the stamping die, uses 4 parts of 40 Cr steel to make a contrast, i. e. the first one is the traditional heat treatment test piece, the second is the heat treatment test piece, the third is the traditional improved heat treatment test piece, and the last one is the initial test for observing their metallographic structure and testing their hardness. The experimental results show that the hardness of the specimen is the highest and the deformation is the smallest, and there are more martensite in metallographic structure with more wear-resistance after heat treatment.
At present, the traditional heat treatment process of automobile stamping die is mostly used in the process of material processing. It often causes low cooling efficiency and short service life of automobile stamping die, which seriously affects the quality and efficiency of automobile manufacturing. This paper puts forward the heat treatment process of 40 Cr ' s automobile stamping die, analyzes the heat treatment process and parameters of the stamping die, uses 4 parts of 40 Cr steel to make a contrast, i. e. the first one is the traditional heat treatment test piece, the second is the heat treatment test piece, the third is the traditional improved heat treatment test piece, and the last one is the initial test for observing their metallographic structure and testing their hardness. The experimental results show that the hardness of the specimen is the highest and the deformation is the smallest, and there are more martensite in metallographic structure with more wear-resistance after heat treatment.
引文
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[2]徐自立.汽车覆盖件冲压模具的结构优化与分析[D].西安:西安科技大学,2010.
[3]逯璐.热冲压模具钢热性能及淬火工艺的数值模拟[D].大连:大连理工大学,2014.
[4]王明涛.汽车车身覆盖件冲压回弹仿真分析及控制方法研究[D].宜昌:三峡大学,2014.
[5]田绍洁,孙香兰,王伟.几种模具热处理工艺改进及表面改性[J].机械传动,2012,36(1):80-84.
[6]宋启明,张凤,叶立渊.激光热处理技术在汽车模具拉毛缺陷上的应用[J].模具制造,2010(4):9-10.
[7]张海涛,张忠选,王远振.激光热处理在汽车模具制造中的应用[J].金属加工,2014(3):42-44.
[8]胡彦固.汽车覆盖件模具中常见材料及其热处理[J].模具制造,2011(10):89-92.
[9]严爱芳,张月异.热处理工艺对汽车用模具钢3Cr2Mo性能的影响[J].热加工工艺,2014,43(20):146-148.
[10]彭利.激光焊接钢铝金属间化合物力学性质及组织性能研究[D].长沙:湖南大学,2012.