本文選題：GH合金管材 + 冷變形行為��； 參考：《材料導(dǎo)報(bào)》2017年10期

【摘要】：通過室溫壓縮試驗(yàn)、數(shù)學(xué)模型擬合、光學(xué)顯微鏡和洛氏硬度計(jì)等手段,并建立GH3625合金管材冷變形本構(gòu)方程,研究了冷變形及熱處理對GH3625合金管材組織和性能的影響。研究表明,GH3625合金管材加工硬化規(guī)律基本符合Hollomon方程,其中冷變形量是影響加工硬化的主要因素;隨著冷變形量的增大,晶粒的變形程度增大,晶粒的變形均勻性逐漸改善,平均晶粒尺寸減小;合金的平均晶粒尺寸隨熱處理溫度的升高呈現(xiàn)出先減小后增大的趨勢,在1 100~1 250℃范圍內(nèi)晶粒長大激活能為180.46kJ/mol;硬度隨熱處理溫度的升高而降低,且在晶粒長大過程中合金的硬度值與平均晶粒尺寸滿足Hall-Patch關(guān)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，

本文編號(hào)：1955778