压铸工艺对AlSi9Cu3铸件力学性能的影响  

Influence of Die Casting Process on Mechanical Properties of AlSi9Cu3 Die Castings

作　　者：杨兴国 杨诚[2] 王茂辉[1] YANG Xing-guo;YANG Cheng;WANG Mao-hui(Chongqing Technology and Business Institute Intelligent Manufacturing and Automotive Institute,Chongqing,401520,China;College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆工商职业学院,重庆401520 [2]重庆大学机械与运载学院,重庆400030

出　　处：《铸造》2022年第6期705-708,共4页Foundry

基　　金：重庆市教育委员会科学技术研究项目(KJQN202004005);重庆工商职业学院重点科研项目(NDZD2020-02)。

摘　　要：某款汽车发动机在耐寒实验时出现冷机启动异响故障,分析其原因,是由于气缸体力学性能不足以及气缸体漏气量超标所导致。通过在轴承孔处增加局部挤压技术,并选择合适的挤压工艺;采用优化压铸工艺参数,改进模具浇注系统,调整喷涂位置等方案,使铸件力学性能达标,机油标识孔漏气率由32%降低到0.4%,使发动机漏气量低于限定值,有效地解决了发动机冷机启动异响故障。During the cold resistance test of a certain automobile engine,there was a problem of large cold engine starting noise.It was analyzed that the reason was caused by insufficient mechanical properties of the cylinder block die casting and air leakage near the oil identification hole.By adding local extrusion technology at the bearing hole,and selecting a suitable extrusion process;using optimized die-casting process parameters,improving the mold pouring program,adjusting the spraying position,etc.,the mechanical properties of the castings reached the standard,and the air leakage rate of the oil marked hole was reduced from 32%to 0.4%.The air leakage rate of oil identification holeof the engine air leakage was less than the limit value,which effectively solved the problem of the engine cold start noise.

关 键 词：气缸体 漏气 力学性能 局部挤压 工艺 

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]