作　　者： ; ; ; (谢幸儿）; (胡曼弘）;

机构地区： 湖南工业大学冶金工程学院

出　　处： 《湖南工业大学学报》 2011年第4期9-12,共4页

摘　　要： 用低倍宏观观察、高倍扫描电镜微观组织观察和断口形貌观察等方法,对5B01铝合金方管型材内外表面、外角、焊缝以及力学拉伸断口进行观察,研究了挤压温度对型材挤压质量的影响。结果表明:该合金在430℃时挤压加工,方管型材的内外表面质量好,外角无裂纹,焊合效果良好,型材整体塑性较好,呈韧性断裂,而且具有较好的基本力学性能,抗拉强度、屈服强度和延伸率分别为335 MPa,138 MPa和26%。 The internal and external surface, exterior angle, welding seam and tensile fracture surface of 5B01 aluminum alloy square tube are investigated by means of macrostructure, scanning electron microscopy and fracture morphology observation, and the extrusion temperature effect on the quality of profile extrusion is studied. The results reveal that the internal and external surface are in good quality and the exterior angle achieves good welding results without any fracture at 430 ℃ extrusion treatment, meanwhile it has good plasticity, shows ductile fracture, and its tension strength, yield strength and elongation rate are 335 MPa, 138 MPa and 26% respectively.

关 键 词： 铝合金 挤压温度 开裂 焊缝

领　　域： [金属学及工艺]