免热处理高伸长率压铸HL-111铝合金的研究及应用  

Application of a Treatment-free Die Casting HL-111 Aluminum Alloy with High Elongation

作　　者：贺艳阳 许钢 邹艳 王春涛 关祥丰 He Yanyang;Xu Gang;Zou Yan;Wang Chuntao;Guan Xiangfeng(Ningbo Heli Technology Co.,Ltd.)

机构地区：[1]宁波合力科技股份有限公司,浙江宁波315700

出　　处：《特种铸造及有色合金》2022年第12期1569-1572,共4页Special Casting & Nonferrous Alloys

摘　　要：采用真空压铸制备了4组壁厚分别为2.2、2.5、2.7和3.0 mm的薄板试样,通过光谱分析、拉伸试验、金相组织分析、SEM断口形貌分析等方法,得出Mn、Mg元素含量及Mn、Mg质量比对不同壁厚试样微观组织及力学性能的影响。结果表明,当Mn含量为0.4%~0.65%、Mg含量为0.17%~0.5%,且Mn、Mg比达到1.69~1.90时,可以使壁厚为2~3 mm的HL-111合金抗拉强度、屈服强度和伸长率分别达到280 MPa、120 MPa和10%以上,力学性能显著提升。Four groups of thin plate specimens with wall thicknesses of 2.2,2.5,2.7 and 3.0 mm were fabricated by vacuum die-casting.Effects of Mn,Mg elements and Mn/Mg ratio on the microstructure and mechanical properties of the specimens with different wall thicknesses were investigated by spectral analysis,tensile test,metallographic microscope analysis,SEM fracture analysis.The results indicate that with Mn content of 0.4%~0.65%,Mg content of 0.17%~0.5%,and the ratio of Mn to Mg of 1.69~1.90,the tensile strength,yield strength and elongation of die casting.HL-111 alloy with wall thickness of 2~3 mm can reach 280 MPa,120 MPa and above 10%,respectively,and the mechanical properties are greatly improved.

关 键 词：Mn、Mg质量比 微观组织 力学性能 HL-111铝合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]