The heat treatment process of parts is to improve the performance and service life of GH3536 alloy. For different types of parts, different processes are used for heat treatment. These processes include solution treatment, stress relief treatment and size stabilization treatment, etc., what are they used for?
The solution treatment can eliminate the residual stress and microstructure inhomogeneity in the alloy, make the alloy have better plasticity and toughness at high temperatures, and improve the machining performance of the alloy. Stress relief treatment can reduce the residual stress caused by machining and avoid cracks and deformation in the use of parts. The stable dimension treatment can further improve the microstructure of the alloy, increase the strength and hardness of the alloy, and prolong the service life
The structure of GH3536 is mainly composed of austenite matrix, carbide and a small amount of Ti(CN) and TiN. The reasonable microstructure can ensure the alloy has good performance at high temperatures and improve the oxidation resistance and creep resistance of the alloy. Carbide can increase the hardness and strength of the alloy, but too much carbide will lead to the increase of brittleness of the alloy, and affect the toughness and plasticity of the alloy. Therefore, it is necessary to control the microstructure and carbide content of the alloy during heat treatment.