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搓丝板是滚压外螺纹的工具,工作条件恶劣,齿刃受强烈的挤压和冲击,要求有高的硬度、耐磨性和韧性。它的主要失效形式是磨损和疲劳断裂。提高Cr12MoV钢搓丝板质量的主要途径是改变碳化物形貌和强韧化处理。Cr12MoV是高碳高铬高合金工具钢(莱氏体钢)。它具有粗大的一次、二次碳化物。在加热时,碳化物很难溶入奥氏体,无法使用热处理工艺消除,轧制里带状分布,因此对原钢必须进行改锻击碎粗大碳化物,使其细化,并通过金属的合理热塑性变形使其分布均匀。碳化
Thread rolling plate is a tool for rolling external thread, poor working conditions, the tooth edge by a strong squeeze and impact, requires high hardness, wear resistance and toughness. Its main failure form is wear and fatigue fracture. The main way to improve the quality of Cr12MoV steel rolling plate is to change the carbide morphology and toughening treatment. Cr12MoV is high carbon high chromium high alloy tool steel (austenitic steel). It has coarse primary and secondary carbides. When heated, the carbide is difficult to dissolve into the austenite, heat treatment can not be used to eliminate the strip distribution in the rolling, so the original steel must be changed to crush coarse carbide, to refine it, and through the metal Reasonable thermoplastic deformation so that it is evenly distributed. Carbonization