【摘要】 针对钨合金白口铸铁脆性大 ,使用范围窄 ,研究了碱金属元素K ,Na对其组织和性能的影响。研究结果表明 ,钨合金白口铸铁经K ,Na变质处理后 ,共晶碳化物由网状分布变成团球状分布 ,碳化物明显细化和分布均匀化。分析了碳化物团球化机理 ,碳化物形态改善导致钨合金铸铁的冲击韧性和抗冲击磨损性能明显提高。变质钨合金白口铸铁用于制造球磨机衬板 ,使用寿命比高锰钢衬板提高 3倍以上。更多还原

【Abstract】 To counter the situation that tungsten alloy white cast iron has great brittleness and narrow appilcation scope, we research the effects of K and Na on the structures and properties of tungsten alloy white cast iron. The results obtained show that by means of K and Na modification, eutectics carbide turns into nodular from network form, carbide is fined and is even distributed. We analyze the mechanism of carbide spheroidizing. Because of the improvement of carbide shape the impact toughness and impact wearresistance of tungsten alloy white cast iron is obviously improved. The service life of modified tungsten alloy white cast iron liner is three times higher than that of high manganese steel liner更多还原