针对某厂合金塑料模具钢P20、718钢板在锯切过程中出现开裂现象，通过从裂纹形貌、裂纹处解剖检查试验等方面，对开裂试样进行研究分析，结果表明，主要是由于钢板中心均存在大量的氮化钛夹杂，在轧制过程中产生微裂纹导致的锯切开裂，并得出了具体解决措施。%Fracture occurred in the sawing process of the P20 and 718 injection mould steel plate is analyzed in this paper .According to the dissection and morphology analysis on the fracture position ,the reasons for cracking are investigated .Titanium nitride inclusions in the central area of the steel plate can cause the generation of the micro‐cracks ,which is the main reason of the fracture during the sawing process .To solve the fracture problem ,some effective measures are also proposed .
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