前言我厂首家试制的C38井下铲运机变速箱等，有多种渗碳淬火零件，不但其内在质量要求高，而且形状极复杂。渗碳淬火变形是一大难关。我们对薄壁多孔简件和简壁厚薄差异过大等极易变形的零件用适宜预留量、可控气氛炉渗碳、盐炉加热、硝盐浴分级淬火工艺．一次试验取得了良好的 Preface Our first prototype C38 downhole scraper gearbox, etc., there are a variety of carburizing and quenching parts, not only its inherent high quality requirements, and the shape is extremely complex. Carburizing quenching deformation is a major difficulty. We thin wall porous and thin wall thickness difference is too large and other easily deformed parts with the appropriate reserves, controlled atmosphere furnace carburizing, salt furnace heating, salt bath classification quenching process. A test made good