对齿轮钢钢材锯切下料时遇到的锯切障碍现象进行了系统的分析，认为引起这种现象的原因是钢材的局部区域存在着比较多的大颗粒硬质夹杂物，导致了该区域的硬度升高。
：In this text, systemic analysis was done about the phenomena that obstruction when gear-steel was cutting, reasons which leaded up to the phenomena were found, that were bigger size and rigid inclusions which existed in slim area of the steel material and brought on rigidity dots in it. keywords：20CrMnTiH steel，cut with a saw，metalloid inclusion
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