How do you heat treat powder metallurgy parts
time：2020-05-19Views：455 Author：Best Seiko
In order to make metal workpieces have the required mechanical properties, physical properties and chemical properties, in addition to the reasonable selection of materials and various forming processes, heat treatment processes are often indispensable. The metal heat treatment process is one of the important processes in mechanical manufacturing, and its function is to improve the intrinsic quality of the workpiece. Heat treatment imparts or improves the performance of the workpiece by changing the microstructure inside the workpiece, or changing the chemical composition on the surface of the workpiece, and generally does not change the shape and overall chemical composition of the workpiece. Treatment process: generally includes three stages of heating, heat preservation, and cooling, and the processes are connected to each other without interruption. The heating temperature is one of the important processes of the heat treatment process. Selecting and controlling the heating temperature is the key to ensuring the quality of heat treatment. The heating temperature is selected according to the metal material to be processed and the purpose of the heat treatment, and it is generally above the phase transition temperature to obtain the desired structure. It takes a certain period of time for the transformation of the structure. Therefore, when the surface of the metal workpiece reaches the required heating temperature, it must be maintained at this temperature for a certain period of time to make the internal and external temperatures consistent to ensure the complete transformation of the organization. This period of time is called the holding time. When high-energy density heating and surface heat treatment are used, the holding time is generally not required or the holding time is very short, and the holding time of chemical heat treatment is often longer. Cooling is an indispensable step in the heat treatment process. The cooling method differs depending on the process, mainly to control the cooling rate. The cooling rate of annealing is very slow, the cooling rate of normalizing is faster, and the cooling rate of quenching is faster. There are also different requirements for the cooling rate due to different steel types. For example, air-hardened steel can be hardened with the normalizing cooling rate. For more information about MIM, please call us. Shenzhen Best Precision Technology Co., Ltd. is a diversified technology company integrating metal injection molding, metal and ceramic 3D printing, and metal jewelry development and production. Best Precision has reached a strategic cooperation with well-known domestic and foreign feeding companies (Kadem Feeding) and BSF for MIM product development and production, mainly for metal powder injection molding, metal powder injection molding, powder injection molding, powder injection molding, Metal 3D printing wire, metal powder injection molding factory, metal powder injection molding factory, powder injection molding factory, powder injection molding factory, MIM process, MIM processing, MIM factory to provide customers in various industries around the world with large quantities, high quality and reasonable MIM products at a price. The company has assembled a team of senior experts in technology, management and market development in the industry, adhering to many years of MIM technology experience and industrial production operation experience, with internationally mature MIM technology, efficient supply chain management and rapid and effective large Large-scale manufacturing capabilities provide customers with a one-stop solution from the preliminary design, sample development and mass production of MIM products.