在大力发展少无切削工艺的群众运动中,熔模铸造工艺正被愈来愈广泛地推广应用。图1所示零件,原为分开制造的两个零件:蜗轮毛坯采用45号钢锻造;链轮毛坯采用KT30—10可锻铸铁铸造。然后,再分别进行机械加工。现在改用45号钢熔模铸造,一次铸成整体件,既保证了质量,又降低了成本。 In vigorously develop the mass movement without cutting technology, investment casting process is being more and more widely applied. The parts shown in Figure 1 were originally two parts manufactured separately: the worm wheel blank was forged with 45 steel and the sprocket blank was cast with KT30-10 malleable cast iron. Then, machining separately. Now switch to 45 steel investment casting, once cast as a whole, both to ensure the quality, but also reduce costs.