反挤压铸造工艺对镁合金轮毂铸件裂纹的影响  

Influence of Indirect Squeezing Casting on crack in Magnesium Alloys Wheels

作　　者：张占领[1] 牛瑞利[2] 曲全鹏[2] 阎峰云[3] 

机构地区：[1]郑州交通职业学院车辆工程系 [2]郑州华信学院 [3]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室

出　　处：《特种铸造及有色合金》2013年第1期33-35,共3页Special Casting & Nonferrous Alloys

基　　金：甘肃省自然科学基金资助项目(ZS031-A25-029-C)

摘　　要：分析了镁合金轮毂铸件裂纹形成的机制,讨论了反挤压铸造工艺对轮毂铸件裂纹的影响。结果表明,减少裂纹获得优良镁合金轮毂铸件的反挤压铸造成形工艺参数如下:保压时间为20～25s,浇注温度为680℃,模具温度为240℃,充型速度为60mm/s,压射比压为85MPa。在合金成分和铸件形状不变的情况下,通过调整反挤压铸造工艺参数,可以显著减少裂纹的产生。The formation mechanism of hot crack in magnesium alloy wheel was analyzed, and effects of indirect squeezing casting on hot crack were investigated. The results show that squeezing casting magnesium alloy wheel exhibits desirable properties with crack free when it is poured at 680 ℃ for 20～25 s and filled at 60 mm/s with pressure of 85MPa and preheating temperature of 240 ℃ o The hot crack can be reduced significantly through adjusting indirect squeezing processing parameters at a fixed chemical composition and shape structure.

关 键 词：镁合金 轮毂 反挤压铸造 裂纹 

分 类 号：TG249.2[金属学及工艺—铸造]