我厂是生产工程机械驱动桥及高压齿轮油泵的专业厂,产品中有许多零件需要局部防渗碳或碳氮共渗。我们总想用一种较理想的防渗涂料。但是,国内过去生产的涂料大都是用水作溶剂,防渗性能不可靠,而且热处理后残余涂层很难清除。据考察,国外防渗涂料用二甲苯作溶剂。防渗效果可靠,渗碳直接淬火后脱落性良好。我国河北枣强县金属热处理材料厂生产的BG型四防涂料,也是以二甲苯作溶剂。我厂使用表明,防渗效果和脱落性能都很令 I plant is the production of construction machinery drive axle and high-pressure gear pump professional factory, there are many parts in the product need to prevent partial carburizing or carbonitriding. We always want to use a more ideal impermeable coating. However, most of the coatings produced in the past are water-based solvents, the seepage resistance is not reliable, and the residual coating after heat treatment is difficult to remove. According to investigation, foreign anti-seepage coatings with xylene as a solvent. Anti-seepage effect is reliable, carburizing direct quenching good off. Hebei Zaoqiang County, China Metal Heat Treatment Material Factory production of BG-type four anti-paint, but also as a solvent for xylene. I use the factory that anti-seepage effect and off performance are very