MIM feedstock powder size used in the 2-15μm, while the original powder metallurgy powder size mostly in the tradition 50-100μm. Finished high density MIM process, because the use of a fine powder. MIM process has the advantages of traditional powder metallurgy process, and high degree of freedom in shape is the traditional powder metallurgy can not be achieved.
Traditional powder metallurgy limited strength and packing density of the mold, mostly two-dimensional cylindrical shape traditional casting off the dry process production of complex shape of the product as a very effective technique, in recent years the use of ventricular assist pottery can be done slit deep hole The finished product, but because of the strength of the pottery of the heart, as well as casting liquid liquidity constraints, the process still has some technical difficulties.
In general, this process of manufacturing large and medium-sized parts more appropriate, small and complex shaped parts MIM process is more suitable places. Comparison Project MIM manufacturing process of traditional powder metallurgy process powder particle size (μm) 2-1550-100 relative density (%) 95-9880-85 Product weight (g) of less than or equal to 400 g 10- Hundreds of three-dimensional shape of the product of complex shape Simple mechanical properties of two-dimensional shapes and compare the merits of MIM process die-casting process using conventional powder metallurgy aluminum and zinc alloy low melting point, good fluidity casting liquid material. The product of this process due to material limitations, its strength, wear resistance, corrosion resistance are limits.
没有评论:
发表评论