机车修理工厂每月生产作为修理机车用的成百吨铸件中,大部分是用OцC4－4-17、OцC5－5－5 及OцC3－11－5青铜铸造的。这些铸件用硬模铸造,由于减少了机械加工裕量和浇冒口上的金属消耗,因而节约了大量的青铜。用硬模铸造青铜铸件,劳动生产率提高了1-2倍,机械加工工时大大减少。由于用硬模铸造,因此青铜铸件的生产成本比用砂型铸造的大为降低。 Locomotive repair shop Monthly production of hundreds of tons of castings used for locomotive repair, most of them are cast with OцC4-4-17, OцC5-5-5 and OцC3-11-5 bronze. The castings are die-cast, which saves a lot of bronze by reducing machining allowances and metal consumption at the sprue gate. Casting bronze castings with hard molds has raised labor productivity by 1-2 times and greatly reduced man-hours for machining. As a result of die casting, bronze casting production costs than sand casting greatly reduced.