滚珠轴承钢的退火工作,对滚珠轴承制造加工及其使用寿命关系甚大,为了改进质量及加工性能我厂对此项工作会进行试验研究,选用修正詹姆士退火法及正常化退火法,前途退火钢料在淬火回火后断面组织较后法为差,后法退人后脱炭较前法稍重,详情已志本刊一九五一年第五期。 经过半年的 Ball bearing steel annealing work on the ball bearing manufacturing process and its service life is very big, in order to improve the quality and processing performance of this plant will be the experimental study of this work, the choice of modified James annealing and normalization annealing method, the future Annealed steel quenched and tempered in the cross-section of the organization after the law is poor, after the law withdrew after the charcoal slightly heavier than the previous Act, the details have been recorded in the fifth issue of 1951 issue. After six months