一、前言钢铁零件表面经渗铬后能获得高硬度(HV1400～1800)渗铬层,具有良好的耐磨、耐腐蚀和抗高温氧化性能,因此,渗铬作为一项重要的化学热处理工艺,已越来越引起人们的重视。目前,常用的固体渗铬剂多采用金属铬粉,或低、中碳铬铁合金作为供铬源。但是,金属铬粉价格昂贵,而低、中碳铬铁粉碎困难。长沙机床工业公司曾用高碳铁(较容易粉碎)作为供铬源进行固体粉末渗铬,但因其含硅量 I. INTRODUCTION The surface of steel parts can get high hardness (HV1400 ~ 1800) chromizing layer after being chromized, which has good wear resistance, corrosion resistance and high temperature oxidation resistance. Therefore, chromizing as an important chemical heat treatment process, Has attracted more and more attention. At present, the commonly used solid chromizing agent mostly uses metallic chromium powder, or low and medium carbon ferrochrome as the source of chromium. However, metallic chromium powder is expensive, while low and medium-carbon ferrochrome is difficult to crumble. Changsha Machine Tool Industry Company has used high-carbon iron (more easily crushed) as a chromium source for solid powder chromizing, but because of its silicon content