Cobalt-chromium-molybdenum alloy powder material for injection molding and manufacturing method of cobalt-chromium-molybdenum alloy powder material

Abstract

The invention relates to the technical field of powder metallurgy, in particular to a cobalt-chromium-molybdenum alloy powder material for injection molding and a manufacturing method of the cobalt-chromium-molybdenum alloy powder material. The cobalt-chromium-molybdenum alloy powder material comprises the following components including, by weight, 27%-30% of chromium, 5.0%-6.0% of molybdenum, 1.0% of nickel, 1.0% of manganese, 0.35% of carbon and the balance cobalt. A production method of the cobalt-chromium-molybdenum alloy powder material comprises the steps that the raw material componentsare analyzed; materials are prepared; melting and alloying are carried out; an alloy of a uniform structure is obtained through a smelting and sintering process; water atomization powder preparationis carried out, and high-sphericity-degree cobalt-chromium-molybdenum alloy powder is produced through a water-gas combined atomization powder preparation device; the powder is dehydrated; low-temperature vacuum drying is carried out; airflow is graded; and the powder with high tap density and high fluidity is obtained by combining airflow grading and vibration screening and matching powder particle size distribution. The cobalt-chromium-molybdenum alloy powder which is stable in quality, high in sphericity degree, high in fluidity, uniform in alloy structure and low in oxygen content is prepared through a water-gas combined atomization method, and therefore the yield of sintered products is increased, and the manufacturing cost is saved.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a cobalt-chromium-molybdenum alloy powder material for injection molding and a manufacturing method thereof. Background technique [0002] In the production of cobalt-chromium-molybdenum alloys, the atomization method is commonly used to produce cobalt-chromium-molybdenum alloys. Among them: the cobalt-chromium-molybdenum powder used for injection molding has poor fluidity and low sintering density, which leads to poor corrosion resistance and polishing performance of the product; when the powder is used Poor shape retention and inaccurate dimensional control lead to the need for machining to meet the use standard after sintering. [0003] Metal Injection Molding (Metal Injection Molding referred to as MIM) is a new powder metallurgy near-static forming technology formed by introducing powder metallurgy from the plastic injection molding industry. It is the product of ...

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Problems solved by technology

[0002] In the production of cobalt-chromium-molybdenum alloys, the atomization method is commonly used to produce cobalt-chromium-molybdenum alloys. Among them: the cobalt-chromium-molybdenum powder used for injection molding has poor fluidity and low sintering density, which leads to poor corrosion resistance and polishing performance of the product; when the powder is used Poor shape retention and inaccurate dimensional control, resulting in products after sintering that need to be machined to meet the use standard

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