High temperature resistant boat for reducing tungsten powder impurities
A high-temperature, boat-resistant technology that can be used in furnaces, lighting and heating equipment, furnace types, etc., and can solve problems such as high impurity content and low output rate
Inactive Publication Date: 2011-04-20
南昌硬质合金有限责任公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a high-temperature-resistant boat with reduced tungsten powder impurities, which solves the problems of high impurity content of Fe, Ni, Cr and low output rate that are unavoidable in the production of coarse-grained tungsten powder by traditional techniques
Method used
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Embodiment 1
[0008] A high-temperature-resistant boat material with reduced tungsten powder impurities is composed of the following raw materials in mass percentages: C content 0.1%, Fe content 46.9%, Ni content 32%, Cr content 20%, Al content 1%, total 100%.
Embodiment 2
[0010] A high-temperature-resistant boat material that reduces tungsten powder impurities is composed of the following raw materials in mass percentages:
[0011] C content is 0.1%, Fe content is 45.9%, Ni content is 32.5%, Cr content is 20%, Al content is 1.5%, totaling 100%.
Embodiment 3
[0013] A high-temperature-resistant boat material with reduced tungsten powder impurities is composed of the following raw materials in mass percentages: 0.05% C content, 46.95% Fe content, 32% Ni content, 20% Cr content, and 1% Al content, totaling 100%.
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The invention relates to a high temperature resistant boat for reducing tungsten powder impurities. The high temperature resistant boat comprises the following raw materials in percentage by weight: less than or equal to 0.1 percent of C, 1-2 percent of Al, 13-20 percent of Cr, 32-50 percent of Ni and 28-54 percent of Fe. The invention has the technical advantages that a traditional and standard stainless steel material design is broken, a method of adding the element Al is boldly used, and a requirement is proposed on the carbon content, i.e. the carbon content is low as far as possible; the casting production process of the boat is not changed, and the proportion of the added ingredients is changed; proved by actual production, a higher impurity content cannot be caused, and the contents of Fe, Ni and Cr of continuously produced coarse tungsten powder particles are reduced to be below 50ppm, wherein the contents of the Ni and the Cr even can be reduced to be below 20ppm.
Description
technical field [0001] The invention relates to a high-temperature-resistant boat, in particular to a high-temperature-resistant boat with reduced tungsten powder impurities. Background technique [0002] The tungsten powder produced by the cemented carbide industry, especially the coarse-grained tungsten powder, is usually made of high-temperature-resistant stainless steel containing Fe, Ni, and Cr elements. Due to the high production temperature, it is generally above 900°C. The elements diffused into the tungsten powder products, resulting in the production of tungsten powder Fe, Ni, Cr impurity elements are high, generally more than 150ppm or even more than 200ppm, even if the production cost is sacrificed, the bottom of the boat is poured The tungsten powder with very high content of Fe, Ni and Cr is separated, and the content of Fe, Ni and Cr in the tungsten powder is generally between 50-100ppm, and the output rate of tungsten powder is greatly reduced, and more than...
Claims
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Login to View More IPC IPC(8): C22C38/40C22C30/00F27B21/04
Inventor 郝立伟刘义平陈世瑞
Owner 南昌硬质合金有限责任公司