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鍛件變形溫度對流動應力的影響

返回列表 來源:濟南泉西重型鍛造機械有限公司 網址:www.qxzxdz.cn 發布日期 2017-07-10 瀏覽: 0

  鍛件變形溫度是影響流動應力最為強烈的因素。一般情況下,隨著鍛件的變形溫度升高,流動應力降低。鍛件加工小編為您介紹因為:

  The deformation temperature of forging is the most important factor affecting the flow stress. Generally, as the deformation temperature increases, the flow stress decreases. A brief introduction to the machining of forgings:

  1、隨著變形溫度的升高,金屬原子熱振動的振幅增大,為使最有效的塑性變形機構同時作用創造條件,滑移阻力減小,新的滑移不斷產生,同時增加了非晶擴散機構及晶間粘性流動,使流動應力降低。

  1, with the increase of temperature, the vibration amplitude of metal atoms heat increases, the plastic deformation mechanism and the most effective action to create conditions, slip resistance decreases, the new slip produced constantly, while increasing the amorphous intergranular diffusion mechanism and viscous flow, the flow stress decreases.

  2、在高溫下發生動態恢復和動態在結晶,使變形金屬得到一定軟化,甚至完全消除加工硬化效應,使流動應力降低。

  2. The dynamic recovery and dynamic crystallization at high temperature can make the deformed metal get a certain softening, and even eliminate the work hardening effect, and reduce the flow stress.

  3、金屬的組織結構發生變化,可能由多相組織轉變為單相組織,而導致流動應力降低。

  3, the microstructure of the metal changes, which may change from multiphase structure to single phase structure, resulting in lower flow stress.

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