在毛主席关于“工业学大庆”的伟大号召指引下,我厂实行两个“三结合”,根据一立方米挖掘机斗齿在矿山使用情况的分析,决定用ZG30Cr2Mo代替高锰钢做斗齿。通过工地试验后获得显著效果。斗齿的化学成份为:C 0.31％,Si 0.26％,Mn 0.69％,P 0.015％,S 0.015％,Cr1.86％,Mo 0.53％。用六吨电弧炉进行冶炼,用70砂造型浇注。为了摸索合理的热处理工艺,斗齿分两组 Under Chairman Mao’s great call for “Daqing of Industry”, our factory implemented two “three combinations”. According to the analysis of the use of one cubic meter of excavator teeth in the mine, it was decided to use ZG30Cr2Mo instead of high manganese steel as the teeth. . Significant results were obtained after the site test. The chemical composition of the teeth is: C 0.31%, Si 0.26%, Mn 0.69%, P 0.015%, S 0.015%, Cr 1.86%, Mo 0.53%. It is smelted with a six-ton ​​electric arc furnace and cast with 70 sand moulds. In order to explore a reasonable heat treatment process, the teeth are divided into two groups