上海机械厂试验成功了用603号渗炭剂代替进口的氰化盐,为国家节约了大量外汇,成本降低一半。无毒渗炭,渗炭质量和氧化盐的没有区别。具体工艺为:先用80％炭屑加入10％Nac1.7％BaCl_2、3％ ZnCl_2,在800～850℃密封烧结4～6小时,然后自然冷却,再加入盐炉渗炭。目前,经该厂改进、巩固,渗炭质量逐步提高,渗炭速度也大大加快(910～930℃时0.4毫米/小时)目前正 Shanghai Machinery Factory successfully tested with No. 603 carburizing agent instead of imported cyanide salt, saving a lot of foreign exchange for the country, reducing costs by half. Non-toxic charcoal, charring quality and oxidized salt no difference. The specific process is as follows: firstly, 10% Nac1.7% BaCl_2, 3% ZnCl_2 is added with 80% charcoal powder, sealed and sintered at 800~850 ° C. for 4~6 hours, then naturally cooled, and then infiltrated by salt furnace. At present, the improvement, consolidation and gradual improvement of the quality of the infiltrated charcoal by the plant are accelerating the rate of infiltration (0.4 mm / h at 910-930 ° C)