苏联有一个工厂最近研究成功一种渗碳用的强活性涂料。应用这种涂料可以大大縮短渗碳时間,并能获得优良的渗碳質量。这种强活性涂料的成分(按重量計)是:烟煤或捣碎的泥煤30％,重油40％,酒精20％,碳酸鈉(苏打)10％。把这些料混合均匀,加入适量的煤油,使之成稀糊状,然后放在一个容器內。把需要渗碳的零件放在容器內浸涂后(每平方公尺渗碳面积消耗3.5～4.5公斤涂料),再装在馬弗罐里,盖上盖 A factory in the Soviet Union recently succeeded in researching a strong reactive coating for carburizing. Application of this coating can greatly shorten the carburizing time, and get excellent carburizing quality. The ingredients (by weight) of this highly active coating are: Bituminous coal or mashed peat 30%, heavy oil 40%, alcohol 20%, sodium carbonate (soda) 10%. Mix these ingredients evenly, add appropriate amount of kerosene, make it into a thin paste, and then placed in a container. Put the parts that need to be carburized in the container after dip coating (carburizing area per square meter consumption of 3.5 to 4.5 kg of paint), and then placed in the muffle jar, cover