Brass coated composite iron powder and its production process
A manufacturing method and technology of composite powder, applied in the direction of coating, etc., can solve the problems of high cost, easy to be oxidized, poor oxidation resistance of powder, etc., and achieve the effect of low production cost and simple process
Inactive Publication Date: 2010-10-13
重庆扬子粉末冶金有限责任公司
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Problems solved by technology
[0003] 1. Copper powder and iron powder are elemental metal powders, which are easily oxidized during use
[0004] 2. The mixed metal powder composed of copper powder, zinc powder, brass powder and iron powder has different bulk density, and segregation is easy to occur when mixing, and the result of segregation will seriously affect the quality of the product
[0005] 3. The cost of raw materials for copper powder and brass powder is very high, and the price is generally around 75,000 yuan per ton
[0006] Due to the above reasons, the price of products produced by using these metal powders is very high, and it is very easy to be oxidized. The quality of the oxidized products is very poor, easy to be damaged, and the service life is short
[0007] In order to solve the above problems, relevant technical personnel have developed copper-clad iron composite powder, which has the advantage of low cost, but has poor oxidation resistance of the powder itself. In the process of producing the product, the anti-oxidation performance of the powder is destroyed, so that the product is still easy to be oxidized
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The present invention will be further described below in conjunction with embodiment:
[0020] The present invention is a composite metal powder in which a copper-zinc alloy cladding layer is formed on a copper-clad iron composite powder, wherein copper accounts for 5%-40% of the total weight of the composite metal powder, and zinc accounts for 5% of the total weight of the composite metal powder. 0.05%-20%, the balance is iron.
[0021] Brass is an alloy of copper and zinc. The brass-iron-clad composite powder of the invention is a composite metal powder with a three-layer structure with iron as the core, copper as the middle layer and copper-zinc alloy as the outer layer. According to the existing technology, it is not feasible to directly coat the copper-zinc alloy on the iron powder particles. The reason is that copper, zinc, copper-zinc alloy and iron are incompatible with each other. The alloy is physically difficult to adhere to the iron powder particles, and i...
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Abstract
The brass clad iron composite powder is formed through forming cladding brass layer on Cu clad Fe composite powder, and contains Cu 5-40 wt%, Zn 0.05-40 wt% and Fe for the rest. The brass clad iron composite powder is produced through mixing Cu clad Fe composite powder and Cu-Zn alloy powder or Zn powder, reducing adhesion or reducing diffusion in a reducing furnace at temperature of 450-800 deg.c for over 30 min to form cladding Cu-Zn alloy layer on Cu clad Fe composite powder, crushing, sieving, mixing and other steps. The present invention has the advantages of low cost, simple technological process, no environmental pollution, high antioxidant performance, etc.
Description
(1) Technical field [0001] The invention relates to a metal powder and a manufacturing method thereof, in particular to a composite metal powder and a manufacturing method thereof. (two), background technology [0002] At present, copper powder, brass powder or iron powder are mainly used as metal powders for oil-impregnated bearings, diamond cutter heads, friction materials, etc., and mixed metals in which two or all of the first three powders are mixed together are also used. Powder, these metal powders have following deficiencies: [0003] 1. Copper powder and iron powder are elemental metal powders, which are easily oxidized during use. [0004] 2. The mixed metal powder composed of copper powder, zinc powder, brass powder and iron powder has different bulk density, and segregation is easy to occur when mixing. The result of segregation will seriously affect the quality of the product. [0005] 3. The cost of raw materials for copper powder and brass powder is very hig...
Claims
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IPC IPC(8): B22F1/02
Inventor 杨发荣杨树
Owner 重庆扬子粉末冶金有限责任公司