For PM & MIM

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For PM & MIM

The particle size distribution of the metal powder has a very large effect on the process performance and sintering properties of the powder. In the traditional PM/MIM process, if the density or hardness requirements are not reached, there would require the addition of infiltrated copper to increase the density and the heat treatment in the post-process process, or the addition of C, Ni, Cr, Mo which are combined into a composite material, but there are variables in the stability of the quality of the process.

In traditional PM process, and in order to meet the requirements, quenching and tempering heat treatment are usually applied to achieve excellent mechanical properties, however, due to fast cooling rate of quenching, parts are prone to deformation, quenching crack and other issues.

Combined with traditional PM/MIM milling process and addition of appropriate proportion, SAGWELL’s superfine powder can be filled in the gap of coarse particles (spherical obviously) in the parts-making process, and meanwhile greatly reduce the subsequent quenching and tempering temperature, and enhance the hardness and strength of parts overall.

Superfine Iron Powder

Grade Fe(%) O(%) C(%) N(%) Max. Hardness(HRB) Max. Bending Strength(MPa)
UHA ≥98.8 ≤0.60 ≤0.03 ≤0.01 89 932
UHB ≥98.5 ≤0.85 ≤0.03 ≤0.01 91.5 885.6
UHD ≥98.85 ≤0.70 ≤0.03 ≤0.01 85 745.1
UHF ≥98.2 ≤1.15 ≤0.03 ≤0.01 99.5 1006.2

Superfine Pre-alloyed Powder

Grade Fe(%) Ni(%) Max. Hardness(HRB) Max. Bending Strength(MPa)
Kind2-1318 Main Component 17.74 101 1432

About Powder Metallurgy

Powder metallurgy is producing metal powder or use the metal powder (or the mixture of metal powder and nonmetal powder) as raw material, making all kinds of metal materials, composite materials and products.

In view of the low mechanical strength and the complex structure of the mechanical parts, especially for the more complex mechanical parts with higher mechanical strength, the particle size / morphology / composition of the material powder is higher.

SAGWELL’s superfine powder can improve the green strength and further improve the mechanical strength of sintered parts with complex shape.

About Metal Injection Molding (MIM)

Metal Injection Molding (MIM) is a new type of near-net forming technology, which is combined with the traditional powder metallurgy process and modern plastic injection molding technology. It is also regarded as the most promising part production method in the 21st century. It has unique advantages not only in the production of high-performance, homogeneous, complex shapes or thin-walled small parts, but also of low cost, high production efficiency and high material utilization (almost 100%).

MIM process is mainly composed of five basic processes including powder and binder preparation, mixing, injection, degreasing and sintering, each process will affect the final performance of MIM products. Among them, the powder preparation is particularly important, improper use of powder not only affects the performance of the final product, but also affects the smooth progress of the entire process. In this paper, the characteristics of powder and application of MIM are summarized.

Based on the requirements of MIM process, SAGWELL has developed superfine iron-based powder and pre-alloyed metal powder for the application of MIM industry.