cold shot valve 是什么阀? 以下一些描述有助于你理解：应该是较低铸造温度下制造的阀 铸件内部的其它一些缺点是，凝固过程中，在不均匀收缩造成的应力集中和接近熔点温度下金属的低强度的综合作用下，出现的清晰裂缝和热撕裂。较低的铸造温度会形成冷疤，熔化金属出现的沙粒或炉渣的累积会导致污点。低级的铸造作业也可能造成其它缺陷。 some other defects in castings are well-defined cracks and hot tears that develop during solidification, under combination of stress concentration from uneven contraction and the metal's low strength at near-melting temperatures. cold shots develop from low casting temperature, and dirt spots result from pickup of sand or slag by molten metal. poor foundry practices can cause other deficiencies, too.查看更多
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