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链条销轴零件一般采用低碳合金钢进行表面化学热处理,以保证其表面耐磨而心部又有足够的强度和韧性。表面处理方法长期来沿用高温液体氰化,由于氰盐有剧毒,故存在严重的公害问题。目前虽逐步改用可倾式转炉气体碳氮共渗,但对长销轴有严重的弯曲变形,影响产品质量,且需较长的生产周期。为此,我们对销轴的用材选择及制造工艺进行综合研究,认为以轴承钢GCr15淬火、回火取代现行的用材及工艺方案有明显的优越性。它不仅能解决公害、变形等问题,缩短了生产周期,而且使零件使用寿命提高50％以上。
Chain pin parts are generally low-carbon alloy steel surface chemical heat treatment, to ensure that the surface of the heart and have wear-resistant enough strength and toughness. Surface treatment of cyanide long-term use of high-temperature liquid, cyanide is highly toxic, so there is a serious problem of pollution. At present, although gradually switch to tilting converter gas carbonitriding, but the long pin shaft has serious bending deformation, affecting product quality, and the need for longer production cycle. To this end, we pin material selection and manufacturing process for a comprehensive study that the bearing steel GCr15 quenching, tempering replaced the existing timber and process programs have obvious advantages. It can not only solve the problems of pollution and deformation, shorten the production cycle, but also improve the service life of parts by more than 50%.