MIM stainless steel products polishing
The commonly used materials of MIM mainly include the following categories:
| Material system | Synthetic component |
| Low alloy steel | Fe-2Ni 、F8i |
| Stainless steel | 316L 、430L、 17-4PH |
| Tool steel | 42Cr2Mo4、 M2 |
| Cemented carbide | WC-CO(6%) |
| Heavy alloy | W-Ni-Fe、 W-Ni-Cu 、W-Cu |
This article is mainly for 316L stainless steel to do a detailed introduction.
| Materials | Density(103kg/ m³) | hardness | Tensile strength Mpa | Rate of elongation |
| Stainless steel | 316L | 7.94 | 52HRB | 580/45 |
Why is polishing necessary?
Because the production process of metal injection molding products is generated after the injection process and then the sintering process
The surface finish of such products is relatively low, roughly Ra1.6-Ra2.0, and occasionally there will be slight burrs on the surface. If the final product is used in consumer electronics, decorations, etc., there are high requirements for the surface of the product, it is necessary to achieve a better finish through the polishing process.
Therefore, for MIM products, surface treatment processes such as grinding and polishing will be increased.
Polishing procedure
Mechanical polishing
-
Polishing equipment
Automatic polishing disc machine
-
Manual polishing.
Optical consumables are matched, as shown in the table below
| Polishing procedure | Rough polishing | Medium polishing | Finishing polishing |
| Polishing wheel | Hemp wheel | Starched plume cloth | Bleach wheel |
| Polishing wax | Coarse white wax | Medium-cast white wax | Fine white wax |
Stainless steel product’s polishing effect display
Using the above polishing scheme, the Stainless steel polished product can achieve a mirror effect.
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