带把冲了是我厂经常使用的修理工具,主要用于冲孔和扩孔。原采用轮箍钢制作,化学成分如下:0.65％C、0.22％Si、0.67％Mn、0.033‰S、0.027％P,其形状及热处理后的硬度要求如图a所示。在使用过程中,带把冲子的柄部经常出现早期“崩块”现象,在一次事故中导致一位工人的眼睛致残。针对这种现象,我们进行了全面的分析和研究, Banding is my factory often used repair tools, mainly for punching and reaming. The original use of steel made of steel, the following chemical composition: 0.65% C, 0.22% Si, 0.67% Mn, 0.033 ‰ S, 0.027% P, the shape and heat treatment after the hardness requirements shown in Figure a. During use, the handle with the punch often showed early “collapse” phenomenon, resulting in the disability of one worker’s eyes in an accident. In response to this phenomenon, we conducted a comprehensive analysis and research,