金属材料或零件在加热过程中,由于氧化脱碳,不但大量损耗金属,更严重的是使零件的热处理质量降低,从而影响零件的性能和使用寿命。因此,防止氧化和脱碳有着重要的意义。另方面,渗碳工艺中的防渗问题也是很重要的,目前普遍应用局部镀铜的方法,其工艺过程很麻烦,而且“三废”问题不好处理。近年来,国内外采用涂料保护进行金属或零件的加热和防渗。许多例子证明这是一个多快好省的办法。此类涂料通常用玻璃料、耐火物、树脂和有机溶剂制造。它类似磁漆,涂刷后,溶剂挥发,树脂将玻璃料和耐火物与被保护表面 Metal materials or parts in the heating process, due to the oxidation decarburization, not only a lot of loss of metal, more serious is the quality of the parts to reduce heat treatment, thus affecting the performance and service life of parts. Therefore, preventing oxidation and decarburization is of great significance. On the other hand, the anti-seepage problem in the carburizing process is also very important. At present, the method of partial copper plating is commonly used. The process is very troublesome, and the problem of “three wastes” is not handled well. In recent years, the use of paint protection at home and abroad for metal or parts heating and seepage control. Many examples prove that this is a much faster and more economical solution. Such coatings are usually made of frits, refractory resins and organic solvents. It is similar to enamel, after brushing, solvent evaporation, the resin will be glass frit and refractory surface to be protected