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对曲轴颈进行中频淬火是提高曲轴耐磨性、延长曲轴使用寿命的重要技术措施。而中频淬火的淬火质量又是达到这种技术措施的保证。目前许多国家采用旋转的半圈淬火方法对曲轴进行中频淬火,此种方法对提高曲轴淬火质量有显著的成效。我国已开始采用曲轴半圈淬火工艺。已有几个厂矿正在大量试验,准备推广应用。我厂于一九七五年五月开始对稀土-镁含铜铸态球墨铸铁曲轴的中频半圈淬火进行试验,同年九月底用于生产。经过一年多的生产
The crank journal IF quenching is to improve the wear resistance of crankshaft, crankshaft to extend the service life of important technical measures. The quenching quality of quenching IF is to ensure that this technical measures. At present, many countries adopt a rotating half circle quenching method to carry out medium frequency quenching on the crankshaft, and this method has remarkable effect on improving the quenching quality of the crankshaft. China has begun to use the crankshaft semi-circle quenching process. There are several factories and mines are a large number of tests, ready to promote the application. I plant in May 1975 on the rare earth - magnesium cast bronze cast ductile iron crankshaft mid-frequency half-quenching test, the same year for the production end of September. After more than a year of production