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**粗加工后600-650度去应力退火2-4小时消除加工应力。热处理前高碳钢单边留0.**3-0.5%合金钢留0.15-0.25%余量。真空热处理加热均匀氧化少。三次回火最大限度消除应力每次回火后冷至室温再进行。SKD61压铸模具热处理变形0.15mm经600度回火后降至0.08mm。
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