锻件变形温度是影响流动应力最为强烈的因素。一般情况下,随着锻件的变形温度升高,流动应力降低。锻件加工小编为您介绍因为:
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、随着变形温度的升高,金属原子热振动的振幅增大,为使最有效的塑性变形机构同时作用创造条件,滑移阻力减小,新的滑移不断产生,同时增加了非晶扩散机构及晶间粘性流动,使流动应力降低。
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、在高温下发生动态恢复和动态在结晶,使变形金属得到一定软化,甚至完全消除加工硬化效应,使流动应力降低。
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、金属的组织结构发生变化,可能由多相组织转变为单相组织,而导致流动应力降低。
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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