What happens to the structural stress of the head during heat treatment?
What happens to the structural stress of the head during heat treatment?Stainless steel head in the process of heat treatment, due to the change of organization of austenite to martensite transformation, due to the increase of the volume will be accompanied by the expansion of the size of workpiece, workpiece parts successively phase change, caused by inconsistent volume grew up stress stainless steel head and organization stress changes of the end result is that the surface tensile stress, heart of compressive stress, just opposite to the thermal stress of organizational stress size and the cooling speed of workpiece in the martensite phase transformation area, shape, material chemical composition and other factorsOnly the thermal stress in the organization transformation had produced stainless steel head, and organizational stress is produced in the process of organizational change, in the cooling process, a result of the combined action of thermal stress and organization stress, is real stress in workpiece a result of the combined action of these two kinds of stress is very complex, influenced by many factors, such as shape component heat treatment process in terms of its development process there are only two types, namely, thermal stress and organization stress, role in the opposite direction when the offset, direction phase superposition on each other at the same timeNo matter they cancel each other or superposition each other, the two stresses should have one dominant factor. When the thermal stress is dominant, the effect results in the workpiece's core being pulled, while when the surface compression tissue stress is dominant, the effect results in the workpiece's core being compressed and the surface being pulledPrev News：>
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Two technical problems about head normalizing| Updated:2020.01.06 Source: Clicks:
