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Method for melting titanium alloy containing high-melting point alloy element

An alloying element, high melting point technology, applied in the field of titanium alloy preparation, can solve the problems of non-frit inclusion, titanium alloy non-frit, composition deviation, etc., and achieve the effect of reducing current and voltage values, ensuring uniformity, and reducing costs

Inactive Publication Date: 2012-03-07
CENT SOUTH UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can use the vacuum consumable arc melting technology to prepare basically qualified titanium alloy ingots of this type, in actual operation, it is necessary to adopt an unconventional melting process system for melting operations, mainly by improving the melting process. It is realized by current and voltage, which are generally 20% higher than the normal melting current and voltage. The increase of current and voltage leads to an increase in the melting speed of the consumable electrode, but because the heat energy required for the melting of each part of the consumable electrode is very different, The melting rate of alloying components such as sponge titanium is faster than that of high melting point alloying elements, resulting in poor chemical composition uniformity of the ingot
Some researchers also use the form of pure high-melting point metal powder. Due to the fine particle size of the powder, relatively speaking, under normal smelting conditions, high-melting point elements can be melted, but because the melting point of high-melting point alloy elements is significantly higher than that of titanium alloy melting pool Temperature, pure high-melting point metal powder often occurs block phenomenon, and the high-melting point alloy powder falling into the molten pool cannot be fully dissolved, which leads to the same problem of non-melting block inclusions. Loss during the process, resulting in composition deviation, and the cost of ultra-fine powder is generally higher than that of pure metal plate
Therefore, it is not difficult to find that in some traditional preparation methods, it is easy to form defects such as non-melting lumps and segregation in titanium alloys.

Method used

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  • Method for melting titanium alloy containing high-melting point alloy element
  • Method for melting titanium alloy containing high-melting point alloy element
  • Method for melting titanium alloy containing high-melting point alloy element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1. Preparation of a Ti13Nb13Zr alloy ingot with a diameter of 360 mm

[0027] 1. Ingredients and electrode block pressing

[0028] Sponge titanium, sponge zirconium and pure niobium plate are used as raw materials. According to the nominal composition of the alloy, the addition of elements in the alloy is designed. The sponge titanium and sponge zirconium are weighed and mixed, and the mixture is mixed by an automatic mixing system. The pure Nb plate element The added amount is calculated as 13.2% by weight.

[0029] 2. Electrode preparation

[0030] See attached figure 1 , 2 , the mixture of sponge titanium and sponge zirconium is divided into four equal parts, respectively pressed into four electrode blocks with the same cross-sectional area and equal length, the cross-section of the electrode block is square; then the four electrode blocks are assembled and welded into A consumable electrode, the consumable electrode is composed of a pure Nb plate sand...

Embodiment 2

[0041] Embodiment two, prepare the Ti35Nb4Sn alloy ingot of diameter 280mm specification

[0042] 1. Ingredients and electrode block pressing

[0043] Sponge titanium, titanium tin and pure niobium plate are used as raw materials, the sponge titanium and titanium tin are calculated according to the nominal composition of the alloy, the raw materials are weighed and mixed, and the material is mixed through an automatic mixing system. The addition of pure Nb plate elements is based on weight percentage 35.3% calculated.

[0044] 2. Electrode preparation

[0045] See attached figure 1 , 2 , the mixture of sponge titanium and titanium tin is divided into four equal parts, respectively pressed into four electrode blocks with the same cross-sectional area and equal length, and the cross-section of the electrode block is square; then the four electrode blocks are assembled and welded into A consumable electrode, the consumable electrode is composed of a pure Nb plate sandwiched bet...

example 3

[0056] Example three, preparation of Ti12Mo6Zr2Fe alloy ingot with a diameter of 280 mm

[0057] 1. Ingredients and electrode block pressing

[0058] Using sponge titanium, sponge zirconium, iron nails, and pure Mo plates as raw materials, the sponge titanium, sponge zirconium, and iron nails are calculated according to the nominal composition of the alloy, weighed and mixed, mixed by an automatic mixing system, and pressed into an electrode block. The pure Mo board is calculated at 12.1% by weight.

[0059] 2. Electrode preparation

[0060] See attached figure 1 , 2 , divide the mixture of sponge titanium, sponge zirconium and iron nails into four equal parts, respectively press into four electrode blocks with the same cross-sectional area and equal length, and the cross-section of the electrode blocks is square; then the four electrode blocks Assembled and welded into a consumable electrode, the consumable electrode is composed of a pure Mo plate sandwiched between any t...

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Abstract

The invention relates to an industrial preparation method for a high-melting point alloy element titanium alloy ingot. The invention is characterized in that an alloy raw material is selected, an electrode block which is specially assembled and spliced is employed, a routine vacuum self-consumption arc melting technology is used, three times melted current and voltage can be adjusted, so that thetitanium alloy ingot containing high-melting point alloy element with uniform chemical components and no impurities can be prepared. The high melting point metal has the advantages of uniform distribution in the self-consumption electrode, convenient self-consumption electrode preparation and low cost, the current and the voltage parameter are reasonable during the melting process, based on the traditional technical route, according to the specific self-consumption assembling mode, a pure metal plate with low cost is used for substituting a mode of adding an intermediate alloy with expensive cost and adding other pure metals in titanium alloy, a multi-time vacuum self-consumption arc melting furnace is used for carrying out melting to obtain the titanium alloy ingot containing high-melting point alloy element and possessing uniform ingredients. The method for melting titanium alloy containing high-melting point alloy element is adapted to industrial application.

Description

technical field [0001] The invention discloses a method for smelting titanium alloys, in particular to a method for smelting titanium alloys containing alloy elements with high melting points, and belongs to the technical field of titanium alloy preparation. Background technique [0002] Biomedical materials are an important branch of materials science and a new field of materials science and technology. The world's population is nearly 6 billion. According to incomplete statistics, there are nearly 400 million disabled people, 60 million physically disabled people, and dental diseases. There are 2 billion patients, and currently there are only 35 million biomaterial device implants, and about 1.5 million joint replacements are performed every year, which is far from the actual number of people who need replacements. Therefore, the market demand for biomedical materials has huge potential. As the first choice for biomedical metal materials, the demand for titanium and its a...

Claims

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Application Information

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IPC IPC(8): C22B9/20C22C14/00C22C1/02
Inventor 杨胜
Owner CENT SOUTH UNIV
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