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Consumable electrode and preparation method thereof and application thereof in melting and molding of titanium alloy ingot casting

A technology of consumable electrodes and electrode blocks, applied in the field of alloy casting, can solve the problems of insurmountable element segregation, unstable and difficult quality of alloy ingots, etc.

Active Publication Date: 2018-03-02
湖南湘投金天钛业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, vacuum consumable arc (VAR for short) is usually used for titanium alloys to melt and solidify sponge titanium and various intermediate alloys or elemental element materials to produce ingots. Since the VAR melting process itself has great influence on the airtightness of the crucible and the melting The stability of the pool has extremely high requirements. It is difficult to control the uniformity of the alloy composition by stirring in the actual smelting process. Therefore, sponge titanium and various alloy elements must be prepared into components through mixing, pressing, welding and other processes. A more uniform consumable electrode, and then VAR melting, but this method still cannot overcome the element segregation problem generated during the condensation process of the molten pool, and the quality of the alloy ingot produced is still unstable

Method used

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  • Consumable electrode and preparation method thereof and application thereof in melting and molding of titanium alloy ingot casting
  • Consumable electrode and preparation method thereof and application thereof in melting and molding of titanium alloy ingot casting
  • Consumable electrode and preparation method thereof and application thereof in melting and molding of titanium alloy ingot casting

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preparation example Construction

[0047] The method for preparing the above-mentioned consumable electrode according to one embodiment includes the following steps S1-S3.

[0048] Step S1: According to the type and content of each element required by the alloy ingot to be prepared corresponding to the consumable electrode, configure the raw material of the consumable electrode body, and make the raw material of the consumable electrode body into the above-mentioned consumable electrode body .

[0049] It can be understood that the raw materials for configuring the main body of the consumable electrode according to the types and contents of the elements required by the alloy ingot to be prepared corresponding to the consumable electrode can be obtained by conventional methods in the field.

[0050] Further, in step S1, the step of making the raw material of the consumable electrode main body into a consumable electrode main body provided with through holes in the axial direction includes the following steps: ma...

Embodiment 1

[0068] The preparation method of Ti1023 alloy ingot containing positive segregation of Fe element is as follows. The main component of Ti1023 alloy is Ti-10V-2Fe-3Al. Among the main elements, Fe is an element that is prone to positive segregation.

[0069] Preparation of the main body of the consumable electrode: According to the GB3620.1-2007 standard, the addition value of each element of the alloy is set to provide raw materials, wherein the target value of Fe in the ingot is 1.85wt%, and the Fe in the main body of the consumable electrode is 1.88wt%. dispensed. According to the ratio of height to diameter of the ingot and the ratio of the crucible in the melting process, the raw materials are pressed into such figure 2 The semi-circumferential sub-electrode block shown has an outer diameter of Φ340 mm, and the weight of the sub-electrode block is not more than 40 kg. The two sub-electrode blocks are spliced ​​around the central rod along the circumferential direction t...

Embodiment 2

[0077] The preparation method of Ti1023 alloy ingot containing positive segregation of Fe element is as follows. The main component of Ti1023 alloy is Ti-10V-2Fe-3Al. Among the main elements, Fe is an element that is prone to positive segregation.

[0078] Preparation of the main body of the consumable electrode: According to the GB3620.1-2007 standard, the addition value of each element of the alloy is set to provide raw materials, wherein the target value of Fe in the ingot is 1.85wt%, and the Fe in the main body of the consumable electrode is 1.92wt%. dispensed. According to the ratio of height to diameter of the ingot and the ratio of the crucible in the melting process, the raw materials are pressed into such figure 2 The semicircular sub-electrode block shown has an outer diameter of Φ420mm, and the weight of the sub-electrode block is not more than 50 kg. The two sub-electrode blocks are spliced ​​around the central rod along the circumferential direction to form an...

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Abstract

The invention provides a consumable electrode, a preparation method thereof and an application thereof in the melting and molding of a titanium alloy ingot casting. The consumable electrode comprisesa consumable electrode main body and an inverse segregation core rod, wherein a through hole is formed in the consumable electrode main body along an axial direction; the inverse segregation core rodis inserted in the through hole; the types of elements in the inverse segregation core rod are the same as the types of elements in the consumable electrode main body; and when the consumable electrode main body contains positive segregation elements and / or negative segregation elements, the content by weight of the same type of positive segregation elements in the inverse segregation core rod islower than the content by weight of the same type of positive segregation elements in the consumable electrode main body, and the content by weight of the same type of negative segregation elements inthe inverse segregation core rod is higher than the content by weight of the same type of negative segregation elements in the consumable electrode main body. The consumable electrode corresponds with the segregation rule of the segregation elements in a solidification process, and creatively solves the element segregation problem of the consumable electrode generated in a molten pool condensation process, thereby improving the quality stability of the alloy ingot casting.

Description

technical field [0001] The invention relates to the technical field of alloy casting, in particular to a consumable electrode, a preparation method thereof and an application in smelting and forming of titanium alloy ingots. Background technique [0002] As titanium alloys and other alloy materials are more and more widely used in aviation, aerospace, marine, chemical and medical fields, the problem of uneven quality of alloy materials caused by serious element segregation in alloy casting has attracted more and more attention. For example, vacuum consumable arc (VAR for short) is usually used for titanium alloys to melt and solidify sponge titanium and various intermediate alloys or elemental element materials to produce ingots. Since the VAR melting process itself has great influence on the airtightness of the crucible and the melting The stability of the pool has extremely high requirements. It is difficult to control the uniformity of the alloy composition by stirring in...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C14/00C22B9/21
CPCC22B9/20C22C1/03C22C14/00
Inventor 焦毅柱张宏岭崔瑞胡珊珊陆威
Owner 湖南湘投金天钛业科技股份有限公司
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