High-performance powder metallurgy material and manufacturing method thereof

Abstract

The invention relates to a high-performance powder metallurgy material, wherein components of the powder metallurgy material are iron powder, aluminum powder, chromium iron, zinc stearate and graphite powder; a manufacturing method of the high-performance powder metallurgy material comprises the steps of ball-grinding the chromium iron till the particle diameter is 0.3-1 microns; uniformly mixing with other powders according to the proportion; performing ball-grinding in a high-performance ball grinder for 5-15 min, wherein the ball-grinding medium is anhydrous organic liquid; in the invention, Al is added in the main component, so that the performance of the powder metallurgy material is improved; the indoor bending strength is 2500 MPa and the relative density is more than 99.9%; high pressing density can be obtained after cold-pressing (pre-pressing) is maintained for a certain time; the prepared sintered steel has a uniform texture, high strength and plasticity, excellent performances and low cost.

Description

technical field [0001] The invention relates to the field of powder metallurgy manufacturing, in particular to a high-performance powder metallurgy material and a manufacturing method thereof. Background technique [0002] In recent years, the powder metallurgy industry has developed rapidly. The demand for iron powder, especially alloy iron powder, continues to increase with the development of the automobile industry, and people have higher and higher performance requirements for iron-based sintered structural parts. Therefore, the development of high-density, high-strength, high-plasticity powder metallurgy structural steel and broadening the application field of powder metallurgy steel are the current research and development directions of powder metallurgy. [0003] Iron-based sintered structural steel is a type of product with the largest output and the widest application in the powder metallurgy industry. The performance is equivalent to ordinary cast iron, the tensi...

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Problems solved by technology

[0005] In order to overcome the above defects, the technical problem to be solved in the present invention is: to overcome the disadvantages of sintered steel of conventional materials such as low strength, poor shape, and high price, and propose a powder metallurgy material with high strength, low cost, and strong high-temperature mechanical properties and its Production Method