'The secret' spring manufacturer -
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How to prolong the service life of spring for spring manufacturers, how to make their product excellence, it is a cliche topic, first of all, to extend the service life of the spring is divided into the following several method 1, spring for isothermal quenching
isothermal quenching method is suitable for small diameter or hardenability enough good spring, it can not only reduce a change of heart, but also can improve the toughness of spring, after isothermal quenching spring again on a best tempering, it can improve the limit of the spring, only pay attention to the tempering temperature should be consistent with the temperature of the isothermal quenching.
2, thermomechanical treatment was carried out on the spring
the meaning of thermomechanical treatment is to make the two aspects of the deformation strengthening and heat treatment strengthening of steel, the combination of toughness and strength of steel, in hot deformation is divided into high, medium and low temperature, such as high temperature thermomechanical treatment is produced under the stable state of austenite deformation quenching, immediately after, of course, also can be combined with forging and rolling, the immediate quenching after forming, after this process, the spring of its strength and fatigue life are greatly improved.
3, to relax the spring
spring in long-term under the action of external force, can produce trace amounts of deformation because of the stress relaxation, especially under high temperature condition this kind of situation will be more serious, for a long time in the past, the precision of the spring will naturally reduce, this also cannot allow the situation to the
precision springs, so this kind of spring should be relaxed after quenching and tempering treatment.
4, shot peening treatment was carried out on the spring
is currently the most widely used process to improve the surface quality of the spring must be shot blast, because spring have higher quality, surface defects such as scratches, folding, oxidation decarburization, so it is also often spring usually work stress points as well as the source of fatigue fracture, if with a small steel shot high speed spray the surface of the spring, namely the shot blast, it can improve the surface strength springs, the surface is always in the stress state, since this spring of fatigue strength and service life will be greatly improved.
5, for low temperature carbonitriding spring coil spring for the combination of tempering and low-temperature carbonitriding process can obviously improve the fatigue life and corrosion resistance.
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