Stressrelieving, softening
Stressrelieving, softening
After the hot and ductile formation as well as after casting inner stresses always remain inside the material, which aim to change the shape of the object. These stresses increase if the cooling down is erratic. The same stresses occur at cold formation resp. in case of some heat-treating methods.
Ha ilyen alkatrészt forgácsolunk, további megmunkálásoknak vetünk alá, de akár külső beavatkozás nélkül is, akkor a tárgy elvetemedhet, sőt el is repedhet. Ezeket a belső feszültségeket megfelelő hőkezelési eljárással csökkenteni lehet, ezt feszültségcsökkentő hőkezelésnek nevezzük.
It is worth to perform stress reduction after every process with a greater deformation. In case of a more delicate part it has to be done even more times after processes with greater stress-changes. E.g. with the part visible on the picture.
Softening:
The aim of softening is to reduce the hardness of steel thus relieving the manipulation. Softening is needed after hot forming resp. to make the structure more even in case of medium or strong alloyed steel.
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