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鋼銼
 新聞資訊 =>  

T12A鋼制銼刀(鋼銼)熱處理新工藝

發布日期:[2018-10-25]    共閱[2509]次
    銼刀刃都要求高的硬度和耐磨性,在齒尖以下淬硬深度要求
>1mm。齒部應無脫碳層,柄部硬度< 35HRC,熱處理后的畸變要求
100mm長度上<0.1mm。為防止銼刀淬火加熱時的氧化脫碳,過去一
般在含有黃血鹽的鹽浴中加熱,鹽浴成分(質量分數)為:35%黃
血鹽+15%碳酸鈉+50%氯化鈉。這種工藝為銼刀的發展做出了很大
貢獻,但由于鹽浴對環境有污染,目前日趨淘汰。現在已應用高
頻感應加熱和流態床通保護氣氛加熱工藝方法。銼刀的淬火工藝
為760~800℃加熱,水淬。由于銼刀柄部硬度要求較低,因此在淬
火時只將有齒部分放入水中淬火,待柄部顏色變成暗紅色時再淬
柄。銼刀在水中冷卻到200℃左右時,取出在水槽邊手工校直。操
作者只要準確掌握銼刀的出水時機,校直不成問題。
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.
銼刀通常在160~180℃的硝鹽中回火1h,回火后齒部硬度
≥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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