1.概述在钢件表面上形成钛扩散层能获得高的耐磨性和高的硬度。由于气体渗钛过程可以控制,这对形成均匀的碳化钛(TiC)覆层是一种最有利的条件。作为处理用的气体,一般采用四氯化钛(TiCl_4)并掺以甲烷,氢气或氩气。然而,由于四氯化钛具有毒性,必须使用耐火材料和高温炉,以及控制处理过程也有困难等原因,使气体渗 1. Overview The formation of a titanium diffusion layer on the surface of steel gives high wear resistance and high hardness. Due to the control of the gas-permeable titanium process, this is one of the most favorable conditions for the formation of a uniform titanium carbide (TiC) coating. As a treatment gas, titanium tetrachloride (TiCl 4) is generally used and is doped with methane, hydrogen or argon. However, due to the toxicity of titanium tetrachloride, refractories and high temperature furnaces have to be used, as well as difficulties in controlling the process and so on, making gas permeation