Precautions for spring steel wire operation
(1) Check the surface for decarburization, cracks and other defects before heat treatment. These surface defects will seriously reduce the fatigue limit of the spring.
(2) quenching and heating should pay special attention to prevent overheating and decarburization, do a good job in the salt bath deoxygenation, control of furnace gas atmosphere, strict control of heating temperature and time
(3) in order to reduce the deformation of the spring in the heating of the furnace, fixture form and cooling quenching into the cooling method.
(4) quenching and tempering as soon as possible, heating to try to even spoon. Tempering fast cooling can prevent tempering brittleness and cause surface compressive stress, improve fatigue strength.
Key words:
spring steel wire
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