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目前,精密机床零件广泛采用渗炭法,但因高温淬火变形大,零件必须进行磨削等后道加工工序。日本不二越公司为了解决这一难点,研究成功了对钢材进行低温淬火的表面热处理法。其一号炉已投入生产。并已申请专利。在传统的渗炭淬火中,钢被加热到相变点(炭素钢为720℃)以上的温度(约900℃),形成均匀的奥氏体组织,通过骤冷,使其相变为高硬度的马氏体组织。传统的软氮化法,是把钢加热到570℃,将氮渗到钢的表面,形成表面硬化层。此法的热处理变形小,但
At present, precision machine tool parts widely used carburizing method, but due to high temperature quenching distortion, parts must be grinding and other processes after the road. Japan’s Fujitsu company in order to solve this difficult problem, the successful study of the steel surface quenching heat treatment method. One of the furnace has been put into production. And has applied for a patent. In conventional carburizing and quenching, the steel is heated to a temperature above the transformation point (carbon steel 720 ° C) (about 900 ° C) to form a uniform austenitic structure, which is rapidly quenched into a high hardness Of martensite. The traditional nitrocarburizing method is to heat the steel to 570 ° C, infiltrate the surface of the steel with nitrogen to form a hardened surface layer. This method of heat treatment deformation is small, however