由于轿车行驶的高速和高安全性,对高速同步器齿环用材料及制造工艺的要求高于普通汽车,我国的轿车以引进车型为主,轿车同步器齿环材料基本上为引进车型的指定材料,占国内市场50％的大众轿车用同步器齿环材料,一直依靠进口,其它的车型则以离心铸管为主,产品质量、产量规模都落后于国外。国外已形成专业化、规 Due to the high speed and high safety of the car driving, the material and manufacturing process of the high-speed synchronizer gear ring are higher than that of the ordinary car. The car of our country is mainly imported and the gear material of the car synchronizer is basically the designation of the imported model Materials, accounting for 50% of the domestic market, Volkswagen sedans with synchronizer ring material, has been relying on imports, the other models are mainly centrifugal cast pipe, product quality, production scale are lagging behind. Foreign has formed a specialization, regulations