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鋼銼
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如何對銼刀進行最佳的熱處理?應注意哪些問題?

發布日期:[2018-10-25]    共閱[2599]次
    銼刀的熱處理工藝流程如下:加熱→冷卻→熱校直→冷卻到室溫→清洗→回火→清洗→檢查。在熱處理工藝的編制和操作過程中,防止齒部淬火脫碳和具有熟練的校直技術是銼刀熱處理的關鍵,因此一般進行高頻感應加熱,或在可控氣氛爐內處理,如沒有條件則可在含有黃血鹽的鹽浴爐中進行。一般黃血鹽的成分為:氯化鈉50%+黃血鹽35%+碳酸鈉15%。資料介紹,在實際加熱過程中黃血鹽的成分可在10%~40%范圍內波動。
The heat treatment process of the file is as follows: heating cooling thermal straightening cooling to room temperature cleaning tempering cleaning inspection. In the preparation and operation of heat treatment process, preventing tooth quenching decarbonization and skilled straightening technology are the key to file heat treatment. Therefore, high-frequency induction heating, or in a controlled atmosphere furnace treatment, if no conditions can be carried out in a salt bath furnace containing yellow blood salt. The ingredients of general yellow blood salt are sodium chloride, 50%+, sodium salt, 35%+, and sodium carbonate 15%. It is reported that the composition of yellow blood salt can fluctuate in the range of 10% to 40% in the actual heating process.
熱處理工藝如下:
The heat treatment process is as follows:
①加熱溫度為750~790℃,保溫時間根據熱處理設備的不同來正確選擇。
(1) the heating temperature is 750~790 degrees, and the holding time is chosen according to the difference of heat treatment equipment.
②冷卻介質為10%的鹽水或流動的清水,溫度應低于30℃,以確保有足夠的冷卻性能,銼刀獲得高的硬度。
(2) Cooling medium is 10% brine or flowing water, the temperature should be lower than 30 degrees Celsius to ensure adequate cooling performance, file to obtain high hardness.
③銼刀的低溫回火,通常是在硝鹽爐中進行,溫度為160~180℃,時間為60~90min。
(3) The low temperature tempering of the file is usually carried out in a nitrate furnace. The temperature is 160-180 C and the time is 60-90 minutes.
熱處理工藝注意事項:
Matters needing attention in heat treatment process:
①銼刀在冷卻介質中冷卻到180~200℃范圍內,應取出立即進行手工校直。銼刀在短時間內校直后再放入介質中冷透,完全淬硬。
First, the file is cooled to 180~200 C in the cooling medium, and it should be removed for manual straightening immediately. The file is straightened in a short time and then put into the medium to cool thoroughly and completely harden.
②降低柄部硬度的方法有四種:其一在鹽浴爐中短時間加熱柄部后油冷;其二是將柄部在500℃左右回火后在油中冷卻;其三為對柄部進行高頻感應加熱;最后為淬火冷卻時,銼刀的齒部先入水,待柄部為暗紅色時再整體冷卻。
(2) There are four ways to reduce the hardness of the handle: firstly, the handle is heated for a short time in a salt bath furnace and then cooled in oil; secondly, the handle is tempered at about 500 degrees Celsius and then cooled in oil; thirdly, the handle is heated by high-frequency induction heating; finally, when quenching and cooling, the tooth of the file is first filled with water, and then cooled as a whole when the handle is dark red.
③銼刀的冷卻技巧。對半圓銼在冷卻時其弧形部分易向內側彎曲,對其預變形;或者弧面向下與介質成45°入水。對于平銼、圓銼、三角銼和方銼等放入時與液面垂直。
Third, the cooling technique of file. The curved part of the semi-circular file is easy to bend inward when it is cooled, so it can be pre-deformed, or the curved part enters the water at 45 degrees with the medium downward. For flat file, round file, triangular file and square file, they are perpendicular to the liquid level when placed.
④銼刀的校直溫度要正確掌握,出水早則硬度低;出水晚了會造成校直困難,甚至產生裂紋和折斷現象。
(4) The straightening temperature of the file should be controlled correctly, and the hardness of the file will be low if the file is discharged early; the straightening will be difficult if the file is discharged late, even cracks and fracture will occur.
確保零件在熱處理過程中順利產出,故它是熱處理工藝文件中的一個重要組成部分。
It is an important part of the heat treatment process document to ensure the smooth production of parts in the heat treatment process.
 

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