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分析了粉末冶金坯体脱模过程中裂纹形成原因，详细论述了脱模工艺、零件形状、模具结构等对裂纹形成的影响，并将脱模过程中出现的裂纹进行了系统分类。
The reason of crack formation during the process of powder metallurgy blank demoulding is analyzed. The influence of demoulding process, part shape and mold structure on the crack formation is analyzed in detail. Cracks in demoulding process are classified systematically.