汽车用铝合金压铸件的慢压射工艺参数研究  

Slow Shot Parameters of Aluminum Alloy Die Castings for Automobiles

作　　者：魏显坤[1] Wei Xiankun(Intelligent Manufacturing and Automotive Institute,Chongqing Technology and Business Institute)

机构地区：[1]重庆工商职业学院智能制造与汽车学院,重庆合川401520

出　　处：《特种铸造及有色合金》2020年第1期53-55,共3页Special Casting & Nonferrous Alloys

基　　金：重庆市教育委员会科学技术研究资助项目(KJQN201804008)。

摘　　要：采用光学显微镜、X射线探伤、模流分析等手段,结合正交试验和力学性能检测,研究慢压射工艺对YZAlSi9Cu3发动机气缸体压铸件组织和力学性能的影响。结果表明,发动机气缸体加工面气孔主要由慢压射工艺设计不合理导致,慢压射速度大于0.4m/s时,铸件卷气量较大,Al液包裹冲头油燃烧产生胶状物较多,铸件综合性能下降;慢压射速度设为0.2m/s时,铸件组织致密,含渣量较少,气孔率低,力学性能较好。The effects of low-speed process on the porosity,microstructure and mechanical properties of YZAlSi9 Cu3 die-casting parts were investigated by means of optical microscopy,X-ray inspection and mold flow analysis,etc,combined with orthogonal test and mechanical testing.The experimental results show that the air hole in the machining surface of an engine cylinder block is mainly caused by the unreasonable design of the low speed process.When the slow injection speed is more than 0.4 m/s,the entrapped-gas volume of the castings is increased,and the liquid of the piston is more than the piston oil,so comprehensive performance is decreased.When the slow injection low speed is 0.2 m/s,the casting structure presents sound with a little slag content and low porosing,so the mechanical properties are desirable.

关 键 词：气缸体 慢压射 正交试验 卷气 力学性能 

分 类 号：TG249.2[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]