往复挤压道次对车用LC9合金表面组织和性能的影响  

Effect of Reciprocating Extrusion Pass Number on Microstructure and Mechanical Properties of LC9 Alumminum Alloy

作　　者：黎仕增[1] 冯义夫[2] 吴琼[3] 

机构地区：[1]广西机电职业技术学院汽车工程系,广西南宁530007 [2]海南职业技术学院工业与信息学院,海南海口570100 [3]苏州科技学院材料工程学院,江苏苏州213000

出　　处：《铸造技术》2018年第2期412-414,共3页Foundry Technology

摘　　要：采用光学显微镜、维氏硬度、极限拉伸强度和压缩屈服强度等试验手段,评价了不同往复挤压道次对LC9铝合金表面微观形貌和力学性能的影响。结果表明,往复挤压道次能显著影响LC9铝合金的组织和力学性能。合金的力学性能随着往复挤压道次的增加呈现出先增加后降低的趋势,500℃条件下当往复变形道次为4次时合金的力学性能最佳。The effect of reciprocating extrustion （RE） pass number on microstructure and mechanical properties of LC9 alumminum alloy were studied by optical microscope, vickers hardness, ultimate tensile strength and yield strength. The results show that the RE pass number could effect on solidification microstructure and the mechanical properties of LC9 alumminum alloy. With the increase of RE pass number, the mechanical properties of LC9 alloy increase first and then decrease. The best deformation temperature should be 500 ℃ and RE passes should be 4-passes.

关 键 词：LC9铝合金 往复挤压道次 表面形貌 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]