柴油机废气涡轮增压器喷嘴环叶片的型线比较复杂,采取单片加工镶装的方式生产,工艺复杂、设备多、材料浪费、效率也低,不能适应生产发展的需要。为了摆脱这种落后的生产状况,我们在整体精密铸造涡轮的基础上,进行了喷嘴环整体精密铸造的试验工作。为了全面考核这种工艺的实用价值,已将这种喷嘴环在广州机务段配属的东风4型0018、0022、0015号机车和天津机务段配属的北京型3038号机车的柴油机上实际运用。截止至1978年末, Diesel exhaust turbocharger nozzle ring blade profile is more complex, to take a single piece processing inlaid production methods, complex technology, equipment, materials, waste, efficiency is low, can not meet the needs of production and development. In order to get rid of this backward production situation, we carried out the overall precision casting of the nozzle ring on the basis of the overall precision casting turbine. In order to fully assess the practical value of this process has this nozzle ring in the Guangzhou locomotive depot associated Dongfeng 4 0018,0022,0015 locomotive and Tianjin locomotive depot associated Beijing type 3038 locomotive diesel engine actually used. As of the end of 1978,