摘要
采用热等静压(HIP)技术成形复杂结构的2A12铝合金粉末零件,基于MSC.MARC软件的Shima模型,使用2A12铝合金材料参数实现成形过程的数值模拟。模拟结果表明,特征结构狭缝处粉末体的相对密度呈现梯度分布,侧面的粉末体相对密度分布均匀;石墨模具基本没有变形。实验结果表明,石墨和铝粉末发生了界面反应,型腔内壁存在凹坑和凸起缺陷;粉末试样的规定塑性延伸强度和抗拉强度分别为179 MPa和316 MPa;断口形貌显示试样断裂起源于粉末界面连接处,由金相显微照片分析材料已经完全致密。
The 2A12 aluminum alloy powder parts with complex structure were manufactured by hot isostatic pressing （HIP）. Based on the Shima model in MSC.MARC software, the forming process was simulated with the use of 2A12 aluminum alloy material parameters. Simulation results show that, the relative density of the powder in slit has gradient distribution, and the powder on side face has uniform distribution; the graphite mould has little deformation. Experimental results show that, the interface reaction happens between graphite and A1 powder; the defects of pits and bumps appear on the inner wall; the Rpo2 and Rm of the sample are respectively 179 MPa and 316 MPa; the fracture of the sample is along the powder interface, and the materials are fully dense with the analysis of metallographic.
出处
《粉末冶金工业》
CAS
北大核心
2016年第2期17-22,共6页
Powder Metallurgy Industry
关键词
热等静压
2A12铝合金
数值模拟
hot isostatic pressing
2A12 aluminum alloy
numerical simulation
