一、概况汽车、拖拉机齿轮是量大面广的易损基础零部件。1972年我国共生产了汽车齿轮370万件,拖拉机齿轮700万件共计1070万件,其中圆柱齿轮约占90%,大螺旋伞齿轮约2.5%,这些齿轮每年消耗钢材(主要是低碳合金钢)约为7万吨左右。1975年我国汽车拖拉机齿轮规划产量2400万件(包括配件), First, the overview Auto, tractor gear is a large amount of vulnerable basic parts. In 1972, China produced a total of 3.7 million automotive gears and a total of 10.7 million tractor gears, of which about 90% were cylindrical gears and about 2.5% were large helical bevel gears, which consumed annual consumption of steel (mainly low carbon alloy steel ) Is about 70,000 tons. In 1975 China’s automobile tractor gear production planning 24 million (including accessories),