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How to solve small problems in the production of springs

2022-12-21

How to solve small problems in the production of springs
In the processing and production of hardware Spring, there will always be a variety of small problems, so how to deal with it?
If the air furnace heating quenching protective gas is not enough or salt bath deoxidation is not enough, it may cause decarbonization, the air furnace heating quenching solution should protect gas or drop organic solution, salt bath heating should deoxidize, BAO impurity mass fraction is less than 0.2;Strengthen surface quality inspection of raw materials.
2. If the hardness after quenching is insufficient, it will reduce the service life of the hardware spring and produce residual deformation.The solution is to choose steels with good hardenability and improve the cooling capacity of quenching medium.The temperature of the metal spring entering the quenching medium should be above AR3, and the quenching heating temperature should be increased appropriately to strengthen the microstructure test after quenching.
3. Overheating will lead to coarse grains and increased brittleness.The solution is to do heating quenching according to the correct process test temperature;To ensure the accuracy of temperature measurement, reduce the temperature of hot forming or strengthen instrument calibration.
4. Cracking is mainly caused by high temperature of quenching medium or strong cooling capacity, surface decarburization, tempering is not timely and other reasons.The solution is to use isothermal quenching or martensite quenching step by step;Take out the quenching medium and air cool to 250~300℃;Temper immediately after quenching

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