Method for promoting desulfuration of electron beam refined high-temperature alloy

Abstract

The invention provides a method for promoting desulfuration of an electron beam refined high-temperature alloy. The method comprises the following steps: S1, pre-treatment of a high-temperature alloy raw material; and S2, electron beam refining and purification of the nickel-based high-temperature alloy to obtain a high purity FGH4096 high-temperature alloy cast ingot. The high-temperature alloy is desulfurated by means of electron beam refining, and a degassing reaction of S impurity element is intensified by means of characteristics of high electron beam refining vacuum degree and high temperature in a beam spot area. According to a characteristic that a water cooling copper crucible is free of pollution in the refining process, problems of erosion of a refractory matter of a conventional process crucible such as VIM and the like are solved. The problem of ultra-purification of a high-temperature alloy base metal is solved by means of density difference of occluded foreign substances and melt and a special inducible solidification mechanism of the electron beams in promoting migration and enrichment of the occluded foreign substances.

Description

technical field [0001] The invention relates to a method for accelerating desulfurization of high-temperature alloys refined by electron beams. Background technique [0002] Superalloy materials are widely used in aerospace and other fields, and are important materials for manufacturing hot-end components in aerospace and other fields, such as modern aero-engines, industrial gas turbines and other key hot-end components (such as turbine blades, turbine disks, combustion chambers, etc.). Due to long-term extreme working environments such as high temperature, high speed, and high stress, there are extremely high requirements for high-temperature strength, creep, and fatigue properties of materials. The level of research and application is an important indicator of a country's comprehensive strength in material science. However, S impurity elements in superalloys tend to form low-melting eutectics, which reduce the plasticity of the material, and are also prone to segregation, ...

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Problems solved by technology

The invention mainly utilizes the means of electron beam refining to desulfurize the high-temperature alloy, utilizes the characteristics of high vacuum and high temperature in the beam spot area of ​​electron beam refining, and strengthens the degassing reaction of S impurity elements; utilizes water-cooled copper crucible in the refining process without pollution Solve the problem of corrosion of crucible refractories in traditional crafts such as VIM; use the density difference between inclusions and melt and the special induced solidification mechanism of electron beams to promote the migration and enrichment of inclusions, and solve the ultra-purification of superalloy base metals question

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