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压铸工艺对AlSi9Cu3铸件力学性能的影响

Foundry(2022)

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Abstract
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.
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