CAJ | 학술논문

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5801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争性能，抗拉强度、屈服强度和延伸率分别为335MPa，138MPa和26％。
용저배굉관관찰、고배소묘전경미관조직관찰화단구형모관찰등방법，대5801려합금방관형재내외표면、외각、한봉이급역학랍신단구진행관찰，연구료제압온도대형재제압질량적영향。결과표명：해합금재430℃시제압가공，방관형재적내외표면질량호，외각무렬문，한합효과량호，형재정체소성교호，정인성단렬，이차구유교호적기본력쟁성능，항랍강도、굴복강도화연신솔분별위335MPa，138MPa화26％。
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.