MIM is a new metal parts near-net forming processing technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy, which is a high technology that has been developing very rapidly in the field of powder metallurgy and industry in recent years.Then, after granulation, it is injected into the mold cavity by injection molding machine in the heated plasticized state to obtain a molding blank, then degreased by chemical or solvent extraction, and finally sintered and densified to obtain the final product.
-
Features of MIM products:
1, the high degree of freedom of the geometry of the parts, like the production of plastic products, a complex shape of metal parts can be formed and produced.
2, MIM products uniform density, good finish, surface roughness can reach Ra 0.80 ~ 1.6μm, weight range of 0.1 ~ 200g. high dimensional accuracy (± 0.1% ~ ± 0.3%), generally without subsequent processing.
3, wide range of applicable materials, wide application areas, high utilization rate of raw materials, high degree of production automation, simple procedures, continuous mass production can be achieved.
4, stable product quality, reliable performance, the relative density of the product can reach 95% to 99%, can be carburized, quenched, tempered and other heat treatment. The products have high mechanical properties such as strength, hardness and elongation, good wear resistance, fatigue resistance and uniform organization.
Internationally, it is widely believed that the development of MIM technology will lead to a revolution in the technology of forming and processing of parts, and is known as “the hottest technology of forming parts in the 21st century”.
Common MIM material applications:
| Material system | Alloy grade and composition | Field of application |
| Low alloy steel | Fe-2Ni, Fe-8Ni | Various structural parts in automobile, machinery and other industries |
| Stainless steel | 316L ,17-4PH | Medical equipment, watch parts |
| Cemented carbide | WC-Co | All kinds of cutting tools, clocks and watches |
| Tungsten alloy | W-Ni-Fe, W-Ni-Cu, W-Cu | Military industry, communications, daily necessities |
| Titanium alloy | Ti,Ti-6Al-4V | Medical and military structural parts |
| Magnetic material | Fe,Fe14 Nd2 B,SmCo5 | Various magnetic performance components |
Properties of several typical MIM materials:
| Material | Density | Hardness | Tensile strength | Elongation | |
| g/cm3 | Rockwell | MPa | % | ||
| Iron based alloy | MIM-2200 (Sintered) | 7.65 | 45HRB | 290 | 40 |
| MIM-2700 (Sintered) | 7.65 | 69HRB | 440 | 26 | |
| MIM-4605 (Sintered) | 7.62 | 62HRB | 415 | 15 | |
| MIM-4605 (quenched and tempered) | 7.62 | 48HRC | 1655 | 2 | |
| Stainless steel | MIM-316L (Sintered) | 7.92 | 67HB | 520 | 50 |
| MIM-17-4PH (sintered) | 7.5 | 27HRC | 900 | 6 | |
| MIM-17-4PH (heat treatment state) | 7.5 | 40HRC | 1185 | 6 | |
| MIM-430L (Sintered) | 7.5 | 65HRB | 415 | 25 | |
| Tungsten alloy | 95%W-Ni-Fe | 18.1 | 30 | 960 | 25 |
| 97%W-Ni-Fe | 18.5 | 33 | 940 | 15 | |
| Cemented carbide | YG8X | 14.9 | HRA90 | Bending strength 2300 | |
| Fine ceramics | Al2O3 | 3.98 | HRA92 | Bending strength 530 | |
Harber metal has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. Harber metal develops the best alloy material solutions for current and future challenges.
Harber Metal Ltd. is a powder metallurgy manufacturing company created since 2014, with good production facilities and advanced technology, and is now into the production of iron-based powder metallurgy and stainless steel powder metallurgy.
