GH3625合金管材冷变形行为及热处理工艺研究

发布时间：2018-05-30 15:23

  本文选题：GH合金管材 + 冷变形行为　； 参考：《材料导报》2017年10期

【摘要】：通过室温压缩试验、数学模型拟合、光学显微镜和洛氏硬度计等手段,并建立GH3625合金管材冷变形本构方程,研究了冷变形及热处理对GH3625合金管材组织和性能的影响。研究表明,GH3625合金管材加工硬化规律基本符合Hollomon方程,其中冷变形量是影响加工硬化的主要因素;随着冷变形量的增大,晶粒的变形程度增大,晶粒的变形均匀性逐渐改善,平均晶粒尺寸减小;合金的平均晶粒尺寸随热处理温度的升高呈现出先减小后增大的趋势,在1 100~1 250℃范围内晶粒长大激活能为180.46kJ/mol;硬度随热处理温度的升高而降低,且在晶粒长大过程中合金的硬度值与平均晶粒尺寸满足Hall-Patch关系式。
[Abstract]:By means of room temperature compression test, mathematical model fitting, optical microscope and Rockwell hardness tester, the constitutive equation of cold deformation of GH3625 alloy pipe was established. The effects of cold deformation and heat treatment on the microstructure and properties of GH3625 alloy pipe were studied. The results show that the working hardening law of HGH3625 alloy pipe basically accords with the Hollomon equation, in which the cold deformation is the main factor affecting the work hardening, and with the increase of the cold deformation amount, the deformation degree of the grain increases, and the deformation uniformity of the grain is gradually improved. The average grain size decreases, the average grain size decreases first and then increases with the increase of heat treatment temperature, the activation energy of grain growth is 180.46kJ / mol at 1 250 鈩，

本文编号：1955778