Function of heat treatment process for flange pipe fittings
After heating, heat preservation and cooling, the performance of the metal will change differently, and the performance of the same flange pipe fittings will also be different after heating, such as the superior performance of stainless steel flange pipe fittings obtained by heating and cooling flange pipe fittings. At the same time, the heating process of stainless steel flange pipe fittings is one of the important parameters in the heat treatment process.
During the heat treatment of flange pipe fittings, the cooling rate of general annealing is very slow, the cooling rate of positive quenching is faster, and the cooling rate of quenching is faster. However, due to different types of steel, there are different requirements. When the flange is heated, when the flange is exposed to the air, the flange fittings are often oxidized. Decarburization has a very negative effect on the surface properties of steel parts after heat treatment. Flange fittings are usually in controllable atmosphere or protective atmosphere. Molten salt neutralization and vacuum heating can also be protected by coating or packaging.
In addition, the heating temperature of flange pipe fittings is one of the important technical parameters in the process of heat treatment, and the selection and control of heating temperature is the main problem to ensure the quality of heat treatment. The heating temperature varies with the temperature of the generic material and heat treatment, but the temperature structure can only be obtained when the temperature is above the phase transformation temperature. Heating is an important heat treatment technique.
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