Ultrapure smelting process for nickel-base high-temperature alloy

A technology of nickel-based superalloy and smelting method, which is applied in the field of vacuum smelting, can solve problems such as inability to balance low-carbon and low gas content, unsatisfactory decarburization, degassing effect, and difficult control of volatile elements, so as to achieve easy alloy composition The effect of control and refining time is short and low cost
CN1552928AInactive Publication Date: 2004-12-08INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2004-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

Process for melting Ni based high temperature alloy with super purity is carried out by degassing at first, purifying alloy elements and heating-up to 1600 - 1650 deg.C for 15 - 20 minutes, cooling to condense, next, heating-up to 1490 - 1540 deg.C for 20 - 30 minutes again, casting into ingots at 1500 - 1550 deg.C, then, melting degassed elements as raw materials to produce Ni based alloy with low carbon and gas contents. Because the raw material is degassed, no carbon is added, and melting time is not long, The Ni based alloy with low carbon and gas contents is obtained.
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Description

technical field

[0001] The invention relates to a vacuum smelting technology, in particular to an ultra-pure smelting method of a nickel-based superalloy with low gas and carbon content by using common raw materials. Background technique

[0002] The gas in the alloy will cause pores and porosity in the alloy, and the pores and porosity usually become the source of alloy fracture cracks. Therefore, reducing the alloy gas content is an important means to improve the strength of superalloys. For some nickel-based superalloys, carbide is a harmful phase, and too much carbide will harm the properties of the alloy. Therefore, it is necessary to invent an ultra-pure smelting method that reduces both gas content and carbon content.

[0003] In the traditional superalloy vacuum smelting process, the method of adding carbon is usually used to deoxidize. To smelt low-carbon superalloys, it is necessary to decarburize while deoxidizing, which requires prolonging the refining time and...

Claims

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