Copper iron tin powder composition and preparation method thereof

Abstract

The invention provides a copper iron tin powder composition and a preparation method thereof. The preparation method of the copper iron tine powder composition includes: firstly, mixing copper powder and iron powder, and dispersing mixture to obtain copper and iron pre-alloy powder; and secondly, adding spindle oil after smashing and screening the pre-alloy powder, and then adding tin powder and graphite powder to obtain the copper iron tin powder composition. As content of copper and tin is increased and the spindle oil is added, wear resistance of the powder composition is improved. Meanwhile, iron powder in the copper iron tin powder composition is exposed by smashing during preparation, and accordingly, strength of the powder composition is improved. Therefore, the copper iron tin powder composition is high in strength and wear resistance.

Description

technical field [0001] The invention relates to the technical field of composite powders, in particular to a copper-iron-tin powder composition and a preparation method thereof. Background technique [0002] At present, in the powder metallurgy industry, it is difficult for a single metal powder to meet the requirements of the product, and each particle of the composite powder is a powder composed of two or more different materials, and the composite powder combines each The nature of the material, so the composite powder is welcomed by the majority of manufacturers. The amount of copper-based composite powder in the composite powder is second only to iron powder, and more copper-based composite powders have been developed. In the production of oil-impregnated bearings, copper-tin powder, especially copper-iron-tin powder, has great advantages. [0003] The Chinese invention patent with the publication number CN101088669A discloses a bronze-clad iron composite powder and i...

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Problems solved by technology

[0003] The Chinese invention patent with the publication number CN101088669A discloses a bronze-clad iron composite powder and its manufacturing method, which is to uniformly mix copper-tin alloy or tin powder in the copper-clad iron composite powder, and perform reduction adhesion or reduction diffusion in the reduction furnace , the temperature in the furnace is 400°C~800°C, and the time is not less than 30 minutes, so that the copper-clad iron composite powder surface forms a copper-tin alloy coating layer. However, this method has the following disadvantages: since the raw material for preparing bronze-clad iron is copper-clad iron , while the preparation of copper-clad iron requires a more complicated procedure, the performance of copper-clad iron has a great influence on the subsequent production of bronze-clad iron, which is prone to unstable performance

[0004] The Chinese invention patent with the publication number 101780541A discloses a bronze-coated iron composite powder and its manufacturing method, which is made of the following raw materials with the following mass composition: a soluble copper ion compound with a copper content of 10%~30%: 10~ 30 parts by weight, soluble fine particle compound with a tin content of 2% to 10%: 2 to 10 parts by weight, iron powder with a particle size of 100 to 500 mesh: 60 to 80 parts by weight, and the composite powder made by the manufacturing method, the The follow-up operation process of the method also includes reduction and crushing. However, the disadvantage of this method is that the powder produced by this method has insufficient strength and wear resistance, and is not suitable for the production of some high-speed miniature oil-impregnated bearings.