Powder Metallurgy Die Working Parts Material and Technology Requirements
Powder metallurgical die working parts are widely used in mechanical industry and are popular among users. The application of powder metallurgical dies is mainly based on the use of various metal powder raw materials, advanced powder metallurgy technology, and reasonable die manufacturing and processing techniques. To ensure the quality of powder metallurgical die working parts, it is necessary to reasonable select materials and reasonable process technology.
1.Material selection of powder metallurgy die working parts
Powder metallurgy die working parts should be selected according to the characteristics of the powder metallurgy process. 1) The powder should have good fluidity, suitable particle size and particle size distribution. The shape, purity and oxide content of the powder should also meet the requirements. 2) Powder should be easy to mold, not easily broken and not prone to segregation. 3) The powder should have good sintering performance, that is, easy to sinter and even performance, no cracks, no pores after sintering. In addition to being selected in terms of the characteristics of the powder metallurgy process, the appropriate material should be selected according to the required working performance of the powder metallurgy die working parts.
2. Technological requirements for die manufacturing and processing of powder metallurgical die parts
1) The powder metallurgy die parts mold should be subjected to accurate machining and precision grinding, so as to ensure that the molded blank has a smooth surface, low roughness and high dimensional accuracy. 2) The powder metallurgy die parts die should be designed with reasonable parameters and good tightness. The demoulding should be smooth and free of burrs. 3) The powder metallurgy die parts should be heat treated properly to ensure the combination of the mechanical properties required for use. 4) In the machining process of powder metallurgical die working parts, care should be taken to prevent machining and damage, so as to avoid burrs and scrap edges, and to ensure the surfacelessness, dimensional accuracy and good machining performance of the workpiece.
3. Quality control of powder metallurgical die working parts
1) To ensure the quality of powder metallurgical die working parts, it is necessary to ensure that the powder used in the process is free of impurities, the profile of mold is reasonable and the size is accurate. 2) For powder metallurgical die parts, it is necessary to control the heat treatment technology, to ensure the uniformity and stability of the workpiece internal performance, and to avoid the generation of internal stress, which affects the service life of the workpiece. 3) Powder metallurgy die working parts must be tested for metallographic structure, tensile strength, hardness, etc., and the qualification rate of all indicators must meet the requirements of the standard.
In summary, in the production of powder metallurgical die, attention should be paid to the reasonable selection of powder metallurgical materials, the reasonable parameters and tightness of die design and manufacturing, the perfect heat treatment process and the reliable quality control. Only by ensuring the quality of powder metallurgical die working parts can the actual production requirements of users be met.
