在联合采煤机的截齿上用T—590焊条堆焊,不但不会降低質量,而且可以节約大量貴重金属。这种方法苏联早就广泛运用,我国有些厂矿亦已开始采用。 T—590焊条的芯綫为低碳鋼絲。药皮成分为:鉻铁粉90％,碳化硼(或鉻化硼)5％,石墨粉5％;用水玻璃作粘結剂。沾制药皮的方法如下:將上述干粉料用水玻璃溶液(比重1.166,水玻璃模数2.4)調成糊 Surfacing with T-590 electrodes on the shearer’s picks will not only degrade the quality but also save a lot of precious metals. This method has long been widely used in the Soviet Union, some factories and mines in China have begun to adopt. T-590 electrode for the low-carbon steel wire. Coating composition: 90% ferric chrome, boron carbide (or boron carbide) 5%, graphite 5%; water glass as a binder. The method of sticking the medicinal skin is as follows: The above dry powder is adjusted with a water glass solution (specific gravity 1.166, water glass modulus 2.4)