有些小零件,如支架、螺钉、螺母等,精度高,形状复杂,有的还带有多个深而细的盲孔。采用光亮等温淬火(即盐炉中加热,碱槽中等温淬火),虽然可以达到硬度要求,表面也光亮,但螺纹及螺纹孔却进入了盐液和碱液,清洗困难,盐碱残存在孔内,造成零件的严重腐蚀。我们采用真空加热淬火,解决了这个问题,已用于生产多 Some small parts, such as brackets, screws, nuts, etc., high precision, complex shape, and some also with multiple deep and thin blind holes. The use of bright isothermal quenching (ie, salt furnace heating, alkaline tank isothermal quenching), although the hardness requirements can be reached, the surface is bright, but the thread and threaded holes have entered the salt and lye, cleaning difficulties, salt and alkali remain in the hole Within, causing serious corrosion of parts. We use vacuum heating quenching to solve this problem, has been used to produce more