Preparation method of large titanium alloy cast ingot containing trace elements

A trace element, titanium alloy technology, applied in the field of titanium alloy melting, can solve the problems of small electrode block splicing, multiple remelting, etc., to achieve the effect of being beneficial to uniformity and improving work efficiency

Inactive Publication Date: 2017-10-27
西安赛特思迈钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing large-scale ingots of titanium alloys containing trace elements, so as to avoid the problem of splicing small electrode blocks and multiple remelting when preparing large-scale ingots

Method used

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  • Preparation method of large titanium alloy cast ingot containing trace elements

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preparation example Construction

[0024] The preparation method specifically comprises the following steps:

[0025] Step 1. Using sponge titanium and master alloy as raw materials, carry out weighing and batching according to the nominal composition of the titanium alloy to be prepared and the number of blocks, to obtain N parts of mixed raw materials, and prepare N parts of trace element powder.

[0026] Step 2. Pour half of each mixed raw material into its corresponding block, pour each portion of trace element powder into its corresponding block, and then pour the remaining half of each mixed raw material into its corresponding In the block; so that the trace element powder is placed in the middle part of the mixed raw material.

[0027] Such as figure 1 As shown, the horizontal and vertical grid-shaped auxiliary brackets divide the mold cavity into sixteen parts, and sixteen parts need to be weighed and mixed to obtain sixteen parts of ingredients, and each part of mixed raw materials is poured into its ...

Embodiment 1

[0032] Embodiment 1 Φ620-2880Kg ingot smelting method of TA9 (Ti-0.2Pd) alloy: the raw materials are 0-grade sponge titanium and industrial pure Pd powder, and the alloy proportion is according to the nominal composition Ti-0.2Pd (wt%). In the mold cavity of Φ460, a grid-shaped auxiliary support is placed in advance to divide the cavity into sixteen points. Batch and weigh 16 times according to the weight of 10Kg respectively, and pour into 16 grid files. Especially in each grid, the titanium sponge is poured in twice, and the Pd powder is placed in the middle. After loosening and taking out the bracket, press it into a Φ460-160Kg TA9 titanium alloy electrode block at one time. The thickness of the pressed large single-weight electrode block is about 300mm. A total of 18 electrode blocks were prepared and welded into 2 consumable electrodes. Subsequent vacuum self-consumption smelting twice to obtain Φ620-2880Kg ingots. The detection results of the Pd element content in th...

Embodiment 2

[0033] Embodiment 2 TC23 (Ti-6Al-4V-0.1Ru) titanium alloy Φ620-3000Kg ingot smelting method: the raw materials are selected 0 grade sponge titanium, AlV55 master alloy, industrial pure aluminum beans, industrial pure Ru powder, and the alloy ratio is according to Ti- 6.2%Al-4.2%V-0.1Ru (wt%). In the mold cavity of Φ380, a grid-shaped auxiliary support is placed in advance to divide the cavity into sixteen points. Respectively by the weight of 6.25Kg batching, weighing sixteen times, pour into sixteen grid files. Especially in each grid, the mixed sponge titanium and alloy materials are poured in twice, and the Pd powder is placed in the middle. After loosening and taking out the bracket, press it into a Φ380-100Kg TC23 titanium alloy electrode block at one time. The thickness of the pressed large single-weight electrode block is about 300mm. A total of 30 electrode blocks were prepared and welded into 4 consumable electrodes. Subsequent vacuum self-consumption smelting thr...

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Abstract

The invention discloses a preparation method of a large titanium alloy cast ingot containing trace elements. In the method, a detachable auxiliary support is placed in a mold cavity and divides the mold cavity into N cells; material weighing and preparation are performed according to nominal components of titanium alloy to be prepared, N parts of mixed raw materials are obtained, and N parts of trace element powder are prepared; one half of each part of mixed raw material is poured into the corresponding cells, each part of trace element powder is poured into the corresponding cells, and then the other half of each part of mixed raw materials is poured into the corresponding cells; the auxiliary support is taken out of the mold cavity; the mixed raw material in the mold cavity is pressed through short-stroke vertical pressing at a time to manufacture a large unit-weight electrode block; the steps are repeated to obtain multiple large unit-weight electrode blocks, the blocks are installed and welded to form a consumable electrode, and 2-3 times vacuum consumable smelting are performed to obtain the large titanium alloy cast ingot containing the trace elements. The problem that small electrode block splicing and multiple re-smelting are needed during large cast ingot preparation can be avoided by adopting the preparation method.

Description

【Technical field】 [0001] The invention belongs to the technical field of titanium alloy smelting methods, and in particular relates to a method for preparing a large ingot of titanium alloy containing trace elements. 【Background technique】 [0002] In order to meet the specific microstructure and performance requirements, different alloying elements are added to titanium to form various grades of titanium alloys. The alloying of titanium is the main method for the performance of titanium materials and the expansion of application fields. Some of the trace elements with less content can help titanium alloys in terms of corrosion resistance, creep resistance, and reduction of brittle phase formation. [0003] In general, there are no harsh methods and requirements for the addition of titanium alloying elements. But for trace elements, the content is about 1%, and the uniformity requirement is very high, and it is the case of large ingots. Special attention should be paid to...

Claims

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Application Information

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IPC IPC(8): B22D23/10B22F3/02C22C1/02C22C14/00
CPCB22D23/10B22F3/02C22C1/02C22C14/00
Inventor 毛江虹罗斌莉杨晓康魏芬绒刘煦
Owner 西安赛特思迈钛业有限公司
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