我厂于一九七二年开始承制40/8空压机。曲轴是空压机的关键零件。按照设计要求是用优质碳素钢,曲轴毛坯靠外委锻造制作,困难很大。在毛主席“打破洋框框,走自工业发展道路”光辉思想指引下,我厂于一九七二年二月开始试制稀土镁球铁曲轴,用以代替锻钢曲轴。经过一年多反复生产实践,已试制成 Our factory started to make 40/8 air compressor in 1972. Crankshaft is the key part of air compressor. In accordance with the design requirements is the use of high-quality carbon steel, crankshaft rough by external forging production, difficult. Under Chairman Mao’s guideline of “Breaking the Western Frame, Walking from the Road of Industrial Development”, our factory started trial production of rare earth magnesium iron-cored iron crankshaft in February 1972 to replace the forged steel crankshaft. After more than a year of repeated production practices have been made