A kind of preparation method of titanium alloy large homogeneous ingot

A titanium alloy, large-scale technology, applied in the field of preparation of large-scale homogeneous ingots of titanium alloys, can solve problems such as ingot composition segregation, and achieve the effect of improving the internal quality

Active Publication Date: 2018-09-25
西安赛特思迈钛业有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a titanium alloy large-scale homogeneous ingot to solve the problem of composition segregation in the ingot

Method used

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  • A kind of preparation method of titanium alloy large homogeneous ingot

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preparation example Construction

[0027] The preparation method specifically includes the following steps:

[0028] Step 1. Preliminarily sieving the titanium sponge according to the particle size, and sieving into large-particle sponge titanium and small-particle sponge titanium; sponge titanium is selected as grade 0 sponge titanium, large-particle sponge titanium is larger than 12.7mm, and small-particle sponge The particle size of titanium is 12.7 mm or less.

[0029] Step 2. Weigh the large-particle sponge titanium and small-particle sponge titanium with the intermediate materials, and pour the obtained N parts of mixed raw materials into N blocks respectively, and meet the requirements of the two adjacent blocks. The mixed raw materials respectively include large-particle sponge titanium and small-particle sponge titanium;

[0030] According to the proportion of the titanium alloy and the number of divisions of the auxiliary bracket, weigh the materials and mix the materials respectively, and pour them into th...

Embodiment 1

[0035] Example 1 TA2 pure titanium Φ620-2880Kg ingot smelting method: the raw materials are grade 0 sponge titanium, industrial pure Fe nail, and titanium dioxide. The alloy ratio is based on the composition Ti-0.25Fe-0.20O (wt%). The titanium sponge is sieved in advance, and is simply divided into two kinds of particles with a 12.7mm boundary.

[0036] A grid-shaped auxiliary bracket is pre-placed in the Φ460 mold cavity, and the cavity is divided into sixteen parts. Respectively mix and weigh 16 times according to the weight of 10Kg, and pour them into 16 grids. Particularly place the mixture of large and small particles between phases. After loosening and taking out the bracket, it is pressed into a TA2 pure titanium electrode block of Φ460-160Kg at one time. The thickness of the pressed large single electrode block is about 300mm.

[0037] A total of 18 electrode blocks were prepared, and two consumable electrodes were assembled by welding. Followed by vacuum consumable me...

Embodiment 2

[0038] Example 2 TC4 (Ti-6Al-4V) titanium alloy Φ620-3000Kg ingot smelting method: raw materials are selected from grade 0 sponge titanium, AlV55 master alloy, industrial pure aluminum beans, and the alloy ratio is Ti-6.2%Al-4.2%V( wt%). The titanium sponge is sieved in advance, and is simply divided into two kinds of particles with a 12.7mm boundary.

[0039] A grid-shaped auxiliary bracket is pre-placed in the Φ380 mold cavity to divide the cavity into sixteen points. According to the weight of 6.25Kg, the ingredients are weighed 16 times and poured into 16 grids. Particularly place the mixture of large and small particles between phases. After loosening and taking out the bracket, it is pressed into a TC4 titanium alloy electrode block of Φ380-100Kg at one time. The thickness of the pressed large single electrode block is about 300mm.

[0040] A total of 30 electrode blocks were prepared, and 4 consumable electrodes were assembled by welding. After 3 times of vacuum consuma...

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Abstract

The invention discloses a method for preparing a titanium alloy large-scale homogeneous ingot. In the method, a mold cavity is used, and a detachable auxiliary bracket is placed in the mold cavity, and the auxiliary bracket divides the mold cavity into N blocks; Sponge titanium is divided into large-grain sponge titanium and small-grain sponge titanium according to the particle size; the large-grain sponge titanium and small-grain sponge titanium are respectively weighed with the intermediate material, and N parts of mixed raw materials are obtained and poured into N compartments respectively block, and meet the requirement that the mixed raw materials in two adjacent blocks contain large-grain sponge titanium and small-grain sponge titanium respectively; the auxiliary bracket is taken out from the mold cavity; the mixed raw material in the mold cavity Press into a large single-weight electrode block at one time; repeat the above steps to obtain multiple large single-weight electrode blocks, assemble and weld them into consumable electrodes, and conduct 2-3 times of vacuum consumable melting on the consumable electrodes to obtain good uniformity A large homogeneous ingot of titanium alloy; the invention solves the problem of component segregation in casting.

Description

【Technical Field】 [0001] The invention belongs to the technical field of titanium alloy smelting methods, and specifically relates to a method for preparing a large-scale homogeneous ingot of titanium alloy. 【Background technique】 [0002] In the practice of large-scale production, the preparation of titanium and titanium alloy ingots often adopts the vacuum consumable remelting method. Vacuum consumable smelting is easy to operate and can effectively control the content of impurity elements. After multiple remelting, large ingots with uniform composition can be obtained. [0003] Vacuum consumable smelting must prepare consumable electrodes in advance, and the corresponding alloy electrode blocks of large ingots have a large unit weight. Mixers are often used to mechanically mix titanium and its alloy elements. For example, the preparation of conventional titanium alloy Ti-6Al-4V electrode block: Pour sponge titanium, master alloy, titanium dioxide, etc. into the mixer, rotate fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C14/00B22F1/00
CPCC22C1/03C22C14/00B22F1/052
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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