Introduction: MIM technology as a near-net shape technology for the manufacture of high quality precision parts offers the unmatched advantages of conventional powder metallurgy, machining and precision casting methods. Features: 1. The raw material powder used is usually in the range of 1 to 20 microns, and the shrinkage rate from the injection embryo to the sintered embryo can reach about 16% -20% depending on the material; 2. The same as the production of plastic products, the production of complex shapes of small metal parts (usually size 0.1-200g); 3. Parts of the organization uniform organization, density, density can reach 95% -99% of the theoretical density, can be carburizing, quenching, tempering and other heat treatment, part of the high dimensional accuracy can also be used after machining deal with; 4. Product size accuracy of up to +/- 0.1 to 0.5%, smooth surface, up to one-time reach Ra1.6; 5. Product quality and production efficiency, high-volume, large-scale production of goods, the cost can be significantly reduced. 6.MIM product design basic principles: Select the shape and location of feed inlet, wall thickness, corner avoid sharp corners, arc transition, can be designed hole, groove, concave and sag can be designed to design the thread, consider the stiffener and Connect the wall, design knurling, printing, engraving trademarks, consider the sintering support, pay attention to pits and weld marks, surface coating or coating, heat treatment, secondary processing; 7.MIM parts usually do not need to be re-machined unless there are special requirements. For materials such as tungsten alloys, hard alloys and other mechanical processing difficulties, MIM process has inherent advantages. On stainless steel, soft magnetic alloys, nickel-iron materials, tungsten alloys, hard gold and tool steel, special alloys can be applied. MIM parts can also be hardened, such as nickel, hard chrome plated surface treatment processes can be used.
Introduction: MIM technology as a near-net shape technology for the manufacture of high quality precision parts offers the unmatched advantages of conventional powder metallurgy, machining and precision casting methods.
