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<p>45钢工件调质处理，尺寸200×150×30，热处理后发现弯曲了0.15mm。之前试过预变形处理但效果不稳定。请问有没有控制热处理变形的实用方法？粗加工留余量再去应力回火这种方案可行吗？</p>