一、情况简介缸套(图1)是我厂生产的钻机泥浆泵上重要易损件之一,由于活塞在其内孔往复排送高压泥浆,因此要求其内表面的耐磨性要好,硬度要高,一般要求渗碳层深度为1.8～2.3毫米,淬火后硬度HRC>58。过去,缸套经固体渗碳后我们一直采准用普通淬火的方法 First, the situation Brief introduction Cylinder liner (Figure 1) is one of the important wearing parts of the mud pump produced by our factory. Due to the piston reciprocates in its bore to discharge the high-pressure mud, the wear resistance of the inner surface is required to be good. The hardness To high, the general requirements of carburized layer depth of 1.8 to 2.3 mm, after quenching hardness HRC> 58. In the past, after cylinder solidification carburizing we have adopted the method of ordinary quenching