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    T12A钢制锉刀(钢锉)热处理新工艺

    2018-10-25 08:47:58 无锡盛发地坪科技有限公司 阅读

    锉刀刃都要求高的硬度和耐磨性,在齿尖以下淬硬深度要求>1mm。齿部应无脱碳层,柄部硬度< 35HRC,热处理后的畸变要求100mm长度上<0.1mm。为防止锉刀淬火加热时的氧化脱碳,过去一般在含有黄血盐的盐浴中加热,盐浴成分(质量分数)为:35%黄血盐+15%碳酸钠+50%氯化钠。这种工艺为锉刀的发展做出了很大贡献,但由于盐浴对环境有污染,目前日趋淘汰。现在已应用高频感应加热和流态床通保护气氛加热工艺方法。锉刀的淬火工艺为760~800℃加热,水淬。由于锉刀柄部硬度要求较低,因此在淬火时只将有齿部分放入水中淬火,待柄部颜色变成暗红色时再淬柄。锉刀在水中冷却到200℃左右时,取出在水槽边手工校直。操作者只要准确掌握锉刀的出水时机,校直不成问题。
    The blade of the file requires high hardness and wear resistance, and the hardening depth below the tooth tip is >1mm. The tooth should have no decarburization layer, the hardness of the handle is < 35HRC, and the distortion after heat treatment requires 100mm length <0.1mm. In order to prevent the oxidative decarbonization of the file during quenching and heating, it used to be heated in a salt bath containing yellow blood salt. The salt bath composition (mass fraction) was: 35% yellow blood Salt + 15% sodium carbonate + 50% sodium chloride. This technology has made a great contribution to the development of the file, but because of the salt bath pollution to the environment, it is gradually eliminated. High frequency induction heating and fluidized bed protection atmosphere heating technology has been applied. The quenching process of the file is heated at 760~800 C and water quenched. Because of the lower hardness requirement of the handle of the file, only the teeth are quenched in water when quenching, and then the handle is quenched when the color of the handle becomes dark red. When the file is cooled to about 200 degrees in water, it is removed by hand and straightened at the edge of the sink. As long as the operator accurately grasps the timing of the effluent, straightening is not a problem.
    锉刀通常在160~180℃的硝盐中回火1h,回火后齿部硬度≥64HRC。
    The file is usually tempered at 1h of 160~180 degree nitrate, and the hardness of the gear is more than 64HRC after tempering. 


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