Grain refinement method of rhenium alloy cast structure

A technology of rhenium alloys and alloys, applied in the field of grain refinement of rhenium alloy casting structures, can solve problems such as the lack of systematic and comprehensive research on ultrasonic fields, achieve simple production equipment, improve mechanical properties, change and refine metallographic structures Effect

Inactive Publication Date: 2011-06-01
王欣
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  • Abstract
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AI Technical Summary

Problems solved by technology

These research experiments did not systematically and comprehensively study the specific main parameters of the ultrasonic field, such as the regular influence of changes in sound intensity and acoustic impedance on the refinement of the rhenium alloy solidification structure

Method used

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Examples

Experimental program
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Embodiment Construction

[0010] The content of the present invention is described in detail through the examples, but not limited by the examples.

[0011] In the present invention, the rhenium alloy ingredients are firstly melted, slag removed, degassed, and refined by a conventional process method, and the alloy liquid is taken out, and the ultrasonic generator is turned on before the rhenium alloy liquid is cast, and the frequency and sound intensity of the ultrasonic wave are adjusted and set. acoustic impedance. The rhenium alloy liquid is poured into the casting mold, and allowed to cool naturally to room temperature, and a rhenium alloy billet with fine grain and uniform structure can be obtained.

[0012] The chemical composition of the rhenium alloy used in the method of the present invention is a Re-Al-Sn-Fe alloy.

[0013] The rhenium alloy that the inventive method adopts is close to the 40ReAlSnFe grade, and its chemical composition is:

[0014]

Re

Al

sn

...

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Abstract

The invention discloses a grain refinement method of a rhenium alloy cast structure, which comprises the following steps of carrying out conventional melting, deslagging, degassing and refining on rhenium alloy ingredients, and finally cooling naturally to room temperature to obtain a rhenium alloy billet with refined grains and uniform structures. The grain refinement method of the rhenium alloy cast structure is characterized in that an ultrasonic field is additionally applied to alloy liquid via a casting mold during alloy casting. The ultrasonic frequency of the rhenium alloy casting mold is 29,500-46,800Hz, the sound intensity in the ultrasonic field is 48-580W, and the average acoustic impedance is 1.50*10<7>-4.55*10<7>kg / m<2>.s. With simple processes and simple production devices adopted, the rhenium alloy metallographic structures can be changed and refined, the mechanical properties of the rhenium alloy can be improved, which are good for the subsequent processing of the ingot.

Description

technical field [0001] The invention relates to a method for refining grains of a rhenium alloy casting structure, which belongs to the field of metal alloy casting technology and metamorphic treatment technology. Background technique [0002] The performance of metal materials is determined by its organization and structure, and the grain size of the metal after crystallization is one of the important characteristic parameters of the organization, so it is necessary to conduct necessary research on the grain size of the metal after crystallization and how to control the grain size. Research. There are two main types of existing metal structure refinement methods: one is chemical refinement, which is to add modifiers, including nucleating agents and grain size inhibitors, to molten metal; the other is physical refinement. Methods, such as mechanical vibration, electromagnetic vibration, mechanical stirring and bubble stirring, etc. The above-mentioned methods all have defi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/02
Inventor 王欣
Owner 王欣
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