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保定宏晟隆精密鑄造有限公司
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當前位置:精密鑄件的熱處理
[來源:www.voipblast.net] [作者:精密鑄造] [日期:18-04-17]
由于精密鑄件目的不同,熱處理的非常多,基本主要可分成兩大類,第一類是組織構造不會經由熱處理而發生變化或者也不應該發生改變的,第二是基本的組織結構發生變化。第一熱處理程序,主要用于消除內應力,而此內應力系在不銹鋼鑄造過程中由于冷卻狀況及條件不同而引起。組織、強度及其他機械性質等,不因熱處理而發生明顯變化。 Because of the different purpose of precision casting, the heat treatment is very much, basically can be divided into two major categories, the first kind is that the structure does not change by heat treatment or should not change, the second is the basic structure changes. The first heat treatment program is mainly used to eliminate the internal stress, and the internal stress is caused by the cooling condition and the different conditions in the process of stainless steel casting. Tissue, strength and other mechanical properties are not changed obviously due to heat treatment. 對于第二類熱處理而主,基地組織發生了明顯的改變,可大致分為五類: For the second types of heat treatment, there are obvious changes in main and base organizations, which can be roughly divided into five categories. 1、軟化退火:其目的主要在于分解碳化物,將其硬度降低,而提高加工性能,對于球墨鑄鐵而言,其目的在于獲得更多的鐵素體組織。 1, softening annealing: its aim is to decompose carbide, reduce its hardness and improve processing performance. For spheroidal graphite cast iron, its purpose is to obtain more ferrite. 2、正火處理:主要目的是獲得珠光體和索氏體組織提高不銹鋼鑄造的機械性能。 2, normalizing: the main purpose is to obtain pearlite and Soxhlet structure to improve the mechanical properties of stainless steel casting. 3、淬火處理:主要為了獲得更高的硬度或磨耗強度,同時的到甚高的表面耐磨特性。 3, quenching treatment: mainly for obtaining higher hardness or abrasion strength, and at the same time, to a very high surface wear resistance. 4、表面硬化處理:主要為獲得表面硬化層,同時得到甚高的表面耐磨特性。 4, surface hardening: the main purpose is to obtain the surface hardened layer, and get very high surface wear resistance. 5、析出硬化處理:主要是為獲得高強度而伸長率并不因而發生激烈的改變。 5, precipitation hardening: mainly for high strength, elongation does not change drastically.
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