CN111560539A - Preparation method of consumable electrode for smelting TB14 titanium alloy - Google Patents
Preparation method of consumable electrode for smelting TB14 titanium alloy Download PDFInfo
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- CN111560539A CN111560539A CN202010500934.7A CN202010500934A CN111560539A CN 111560539 A CN111560539 A CN 111560539A CN 202010500934 A CN202010500934 A CN 202010500934A CN 111560539 A CN111560539 A CN 111560539A
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- C22C14/00—Alloys based on titanium
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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Abstract
The invention relates to the technical field of titanium material processing, and discloses a preparation method of a consumable electrode for smelting TB14 titanium alloy. The method comprises the following steps: (1) taking titanium sponge and niobium strips as raw materials, and batching and weighing the titanium sponge according to the nominal composition of TB14 titanium alloy according to the weight of the niobium strips; (2) 1/2 titanium sponge is put into the lower end of the press; (3) putting the niobium strip into the center of a press; (4) putting the rest part of the titanium sponge into the upper end of a press, and pressing to obtain an electrode block; (5) and (4) repeating the steps (1) to (4) to obtain a plurality of electrode blocks, and welding the electrode blocks into a vacuum consumable electrode for smelting the TB14 titanium alloy. The method comprises the steps of weighing a plurality of customized niobium strips, and batching and weighing the titanium sponge, so that impurities mixed in the cut niobium strips are reduced; the niobium strip is divided into a plurality of parts and placed in the center of the electrode for pressing, the niobium strip is not easy to fall into a molten pool, and the uniformity of the titanium alloy ingot casting is improved.
Description
Technical Field
The invention relates to the technical field of titanium material processing, in particular to a preparation method of a consumable electrode for smelting TB14 titanium alloy.
Background
The TB14(Ti-45Nb) alloy is used as a special material for rivets, and has wide application in the aspects of aerospace due to excellent cold working performance, specific strength and high plasticity.
The melting method of the TB14 alloy generally adopts a vacuum consumable furnace to carry out three times of melting, and the preparation of an electrode is the key for determining the quality of an ingot. The consumable electrode raw material of the TB14 alloy comprises sponge titanium and niobium strips, and three methods are generally adopted for adding the niobium element: the niobium strip, the niobium powder or the titanium-niobium alloy powder is directly used. The content of niobium element in the TB14 alloy is 42% -47%, if niobium powder or titanium niobium alloy powder is adopted, the added powder is more, the powder and titanium sponge can be not compacted in the electrode pressing process, and the niobium powder firstly falls into a molten pool in the smelting process to cause component segregation. Therefore, the high-purity niobium strip is selected as the niobium element raw material in the TB14 alloy.
In real life, niobium strips are often supplied in two specifications: the niobium strips with the two specifications are selected from 13x13x300mm or 17x17x450mm, the niobium strips need to be cut for balancing weight, impurities are easy to mix in the cutting process, and the impurities are avoided in the smelting process. According to the invention, 7 niobium strips with specific sizes are used for proportioning and weighing, and then the titanium sponge is proportioned according to the nominal composition of the TB14 titanium alloy, so that the cutting process in the process of balancing the niobium strips and the titanium sponge can be reduced, and the mixing of impurities in the process of pressing electrodes can be strictly controlled.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, niobium powder or titanium-niobium alloy powder is adopted, the powder and titanium sponge are not compacted possibly in the electrode pressing process, the niobium powder drops into a molten pool firstly in the smelting process to cause component segregation, a niobium strip needs to be weighed through cutting, and impurities are easily mixed in the cutting process, and provides a preparation method of a consumable electrode for smelting a TB14 titanium alloy.
In order to achieve the aim, the invention provides a preparation method of a consumable electrode for smelting a TB14 titanium alloy, which comprises the following steps:
(1) taking titanium sponge and a plurality of niobium strips as raw materials, weighing the niobium strips, and then batching and weighing the titanium sponge according to the weight of the niobium strips and the nominal composition of the TB14 titanium alloy;
(2) 1/2 titanium sponge prepared by TB14 titanium alloy is put into the lower end of a press;
(3) putting the weighed niobium strip into the center of a press;
(4) putting the titanium sponge of which the rest is prepared according to the TB14 titanium alloy into the upper end of a press, and pressing to obtain an electrode block;
(5) and (5) repeating the steps (1) to (4) to obtain a plurality of electrode blocks, and welding the plurality of electrode blocks into a vacuum consumable electrode for smelting the TB14 titanium alloy.
Preferably, in step (1), the titanium sponge is 0A grade titanium sponge.
Preferably, in the step (1), the particle size of the titanium sponge is 0.83 to 12.7 mm.
Preferably, in step (1), the niobium strip is an Nb1 niobium strip.
Preferably, in step (1), the purity of each niobium strip is greater than 99.95%.
Preferably, in step (1), the size of each niobium strip is 16.2-18.6mmx16.2-18.6mmx300 mm.
Preferably, in step (1), each niobium strip has a straightness of not more than 1 mm/m.
Preferably, in the step (1), titanium sponge and 6-8 niobium strips are taken as raw materials, the niobium strips are weighed, and then the titanium sponge is proportioned and weighed according to the nominal composition of the TB14 titanium alloy according to the weight of the 6-8 niobium strips.
Preferably, in the step (1), the content of the niobium element in the TB14 titanium alloy is 42-47 mass%.
Preferably, in step (4), pressing is performed using a 1200T titanium sponge hydraulic press.
Preferably, in the step (5), the steps (1) to (4) are repeated to obtain 4-10 electrode blocks, and the 4-10 electrode blocks are welded into a vacuum consumable electrode for smelting the TB14 titanium alloy.
The invention discloses a preparation method of a consumable electrode for smelting a TB14 titanium alloy, which comprises the steps of weighing a plurality of customized high-purity niobium strips, and blending and weighing sponge titanium according to the nominal components of the TB14 titanium alloy, so that impurities mixed into the electrode in the process of cutting the niobium strips can be reduced; the niobium bar is placed in the right center of the electrode for pressing, so that the operation is simple, and the production cost can be reduced; compared with powdery niobium materials with other specifications, the niobium strip is not easy to fall into a molten pool, and the uniformity of the titanium alloy ingot casting is improved.
Drawings
Figure 1 is a schematic cross-sectional view of a pressed consumable electrode block of the present invention.
Description of the reference numerals
A is the placing position of the titanium sponge in the step (2); b is the placing position of the niobium strip in the step (3); and C is the titanium sponge placing position in the step (4).
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention relates to a preparation method of a consumable electrode for smelting TB14 titanium alloy, which comprises the following steps:
(1) taking titanium sponge and a plurality of niobium strips as raw materials, weighing the niobium strips, and then batching and weighing the titanium sponge according to the weight of the niobium strips and the nominal composition of the TB14 titanium alloy;
(2) 1/2 titanium sponge dosed with TB14 titanium alloy was placed into the lower end of the press (shown as A in FIG. 1);
(3) placing the weighed niobium strip into the center of the press (shown as B in fig. 1);
(4) putting the rest of the titanium sponge prepared from the TB14 titanium alloy into the upper end of a press (shown as C in figure 1), and pressing to obtain an electrode block;
(5) and (5) repeating the steps (1) to (4) to obtain a plurality of electrode blocks, and welding the plurality of electrode blocks into a vacuum consumable electrode for smelting the TB14 titanium alloy.
In the process of the present invention, the titanium sponge may be a conventional choice in the art. Preferably, in step (1), the titanium sponge is 0A-grade titanium sponge.
In the method of the present invention, in the step (1), the particle size of the titanium sponge is 0.83 to 12.7mm, specifically, for example, 0.83mm, 0.88mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm or 12.7mm, and preferably, in the step (1), the particle size of the titanium sponge is 0.83 to 5 mm.
In the method of the present invention, the niobium strip (Nb strip) may be a conventional choice in the art. In a preferred embodiment, in step (1), the niobium strip is an Nb1 niobium strip.
In the method of the present invention, the niobium strip used is a high-purity niobium strip in order to avoid introducing impurities into the electrodes. In step (1), the purity of each niobium strip is more than 99.95%, preferably, in step (1), the purity of each niobium strip is more than 99.99%.
In the method, high-purity niobium strips with customized sizes are adopted, and titanium sponge is proportioned and weighed according to the nominal composition of the TB14 titanium alloy, so that impurities mixed into electrodes in the process of cutting the niobium strips can be reduced. In the step (1), the size of each niobium strip is 16.2-18.6mmx16.2-18.6mmx300 mm. In a preferred embodiment, each niobium strip has a size of 17.3mmx17.3mmx300 mm.
In the method of the present invention, in the step (1), the straightness of each niobium strip is not more than 1mm/m, preferably, the straightness of each niobium strip is not more than 0.9mm/m, and more preferably, the straightness of each niobium strip is not more than 0.8 mm/m.
In the method, in the step (1), titanium sponge and 6-8 niobium strips are used as raw materials, the niobium strips are weighed, and then the titanium sponge is proportioned and weighed according to the nominal composition of TB14 titanium alloy according to the weight of the 6-8 niobium strips. Specifically, the number of niobium strands may be 6, 7 or 8, and preferably, the number of niobium strands is 7.
In the method, the ratio of the sponge titanium to the niobium strip meets the requirement of the ratio of TB14 titanium alloy. In the step (1), the content of niobium in the TB14 titanium alloy is 42-47 mass%; specifically, for example, the amount may be 42 mass%, 43 mass%, 44 mass%, 45 mass%, 46 mass%, or 47 mass%; preferably, in the step (1), the content of the niobium element in the TB14 titanium alloy is 45 mass%.
In the method of the present invention, in step (4), the equipment used for pressing may be selected conventionally in the art, and preferably, a 1200T titanium sponge hydraulic press is used for pressing.
In the method, in the step (5), the steps (1) to (4) are repeated to obtain a plurality of electrode blocks, and the electrode blocks are welded into a vacuum consumable electrode for smelting the TB14 titanium alloy. According to the actual situation, a plurality of consumable electrode blocks can be welded for subsequent vacuum consumable melting. In a preferred embodiment, in the step (5), the steps (1) to (4) are repeated to obtain 4 to 10 electrode blocks, and the 4 to 10 electrode blocks are welded into a vacuum consumable electrode for smelting the TB14 titanium alloy.
In a preferred embodiment, the preparation method of the consumable electrode for smelting the TB14 titanium alloy comprises the following steps:
(1) taking titanium sponge and 7 niobium strips as raw materials, weighing the niobium strips, and then batching and weighing the titanium sponge according to the weight of the 7 niobium strips and the nominal component of the TB14 titanium alloy;
(2) 1/2 titanium sponge dosed with TB14 titanium alloy was placed into the lower end of the press (shown as A in FIG. 1);
(3) placing the weighed niobium strip into the center of the press (shown as B in fig. 1);
(4) putting the rest of the titanium sponge prepared from the TB14 titanium alloy into the upper end of a press (shown as C in figure 1), and pressing to obtain an electrode block;
(5) and (5) repeating the steps (1) to (4) to obtain 6 electrode blocks, and welding the 6 electrode blocks into a vacuum consumable electrode for smelting the TB14 titanium alloy.
According to the method, a plurality of high-purity niobium strips with the customized sizes are weighed, and the sponge titanium is proportioned and weighed according to the nominal components of the TB14 titanium alloy, so that impurities mixed into electrodes in the process of cutting the niobium strips can be reduced; the niobium bar is placed in the right center of the electrode for pressing, so that the operation is simple, and the production cost can be reduced; compared with powdery niobium materials with other specifications, the niobium strip is not easy to fall into a molten pool, and the uniformity of the titanium alloy ingot casting is improved.
The present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.
Example 1
This example illustrates a TB14(Ti-45Nb) alloy
A method for preparing a consumable electrode for smelting.
0A-grade sponge titanium and 7 niobium strips with the mark of Nb1 are used as raw materials, the specification of a single niobium strip is 17.3mmx17.3mmx300mm, and the materials are mixed according to the nominal proportion of Ti-45% of Nb. First, 3.3Kg of 0A-grade titanium sponge is put into the lower end of the press (shown as A in figure 1), then 7 Nb strips are evenly placed at the positive center of the electrode (shown as B in figure 1), and 3.3Kg of 0A-grade titanium sponge is put into the upper end of the press (shown as C in figure 1)Shown) was pressed to obtain an electrode block. 6 electrode blocks are welded into a single consumable electrode block
And pressing 12 electrode blocks in total, and welding into 2 consumable electrode blocks. Then smelting in a vacuum consumable electrode furnace for three times to obtain
And (5) ingot casting. The components of the cast ingot are uniform through measurement, and no component segregation is found.
Example 2
This example illustrates a TB14(Ti-45Nb) alloy
A method for preparing a consumable electrode for smelting.
0A-grade sponge titanium and 8 niobium strips with the mark of Nb1 are used as raw materials, the specification of a single niobium strip is 16.2mmx16.2mmx300mm, and the materials are mixed according to the nominal proportion of Ti-45% of Nb. Firstly, 3.3Kg of 0A-grade titanium sponge is put into the lower end of a press (shown as A in figure 1), then 8 Nb strips are evenly placed at the positive center of an electrode (shown as B in figure 1), and 3.3Kg of 0A-grade titanium sponge is put into the upper end of the press (shown as C in figure 1) for pressing, thus obtaining an electrode block. 6 electrode blocks are welded into a single consumable electrode block
And pressing 12 electrode blocks in total, and welding into 2 consumable electrode blocks. Then smelting in a vacuum consumable electrode furnace for three times to obtain
And (5) ingot casting. The components of the cast ingot are uniform through measurement, and no component segregation is found.
Example 3
This example illustrates a TB14(Ti-45Nb) alloy
A method for preparing a consumable electrode for smelting.
The method is characterized in that 0A-grade sponge titanium and 6 niobium strips with the mark of Nb1 are used as raw materials, the specification of a single niobium strip is 18.6mmx18.6mmx300mm, and the materials are mixed according to the nominal proportion of Ti-45% of Nb. Firstly, 3.3Kg of 0A-grade titanium sponge is put into the lower end of a press (shown as A in figure 1), then 6 Nb strips are evenly placed at the positive center of an electrode (shown as B in figure 1), and 3.3Kg of 0A-grade titanium sponge is put into the upper end of the press (shown as C in figure 1) for pressing, thus obtaining an electrode block. 6 electrode blocks are welded into a single consumable electrode block
And pressing 12 electrode blocks in total, and welding into 2 consumable electrode blocks. Then smelting in a vacuum consumable electrode furnace for three times to obtain
And (5) ingot casting. The components of the cast ingot are uniform through measurement, and no component segregation is found.
Comparative example 1
The procedure of example 1 was followed except that 2Kg of 0A grade titanium sponge was placed in the lower end of the press, 7 Nb bars were placed uniformly thereon, and 4.6Kg of 0A grade titanium sponge was placed in the upper end of the press and pressed. Compositional segregation was found in the ingot.
Comparative example 2
The procedure of example 1 was followed except that Nb strips of 17mm x17 mm x450mm gauge were selected, and after cutting, 5Nb strips of 17mm x17 mm x300mm, 4 Nb strips of 17mm x17 mm x150mm and 1 Nb strip of 17mm x17 mm x 75mm were selected, placed uniformly in the center of the electrode, and pressed. No significant compositional segregation was found in the ingot, but a small amount of impurities was found to be entrained during the cutting of the Nb strands.
Comparative example 3
The procedure of example 1 was followed except that 4 Nb strips of 22.9mm x 22.9mm x300mm gauge were picked, placed evenly in the center of the electrode and pressed. Because the weight of a single niobium strip is too heavy, the niobium strip directly falls into a molten pool during the first melting process, resulting in the suspension of melting.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A preparation method of a consumable electrode for smelting a TB14 titanium alloy is characterized by comprising the following steps:
(1) taking titanium sponge and a plurality of niobium strips as raw materials, weighing the niobium strips, and then batching and weighing the titanium sponge according to the weight of the niobium strips and the nominal composition of the TB14 titanium alloy;
(2) 1/2 titanium sponge prepared by TB14 titanium alloy is put into the lower end of a press;
(3) uniformly placing the weighed niobium strips into the center of a press;
(4) putting the titanium sponge of which the rest is prepared according to the TB14 titanium alloy into the upper end of a press, and pressing to obtain an electrode block;
(5) and (5) repeating the steps (1) to (4) to obtain a plurality of electrode blocks, and welding the plurality of electrode blocks into a vacuum consumable electrode for smelting the TB14 titanium alloy.
2. The method according to claim 1, wherein in step (1), the titanium sponge is 0A grade titanium sponge;
preferably, in the step (1), the particle size of the titanium sponge is 0.83 to 12.7 mm.
3. The method of claim 1, wherein in step (1), said niobium strip is an Nb1 niobium strip.
4. The method of claim 1, wherein in step (1), each niobium strip has a purity of greater than 99.95%.
5. The method as claimed in claim 1 or 4, wherein in step (1), the size of each niobium strip is 16.2 to 18.6mmx300 mm.
6. The method of claim 1 or 4, wherein in step (1), each niobium strip has a straightness of no more than 1 mm/m.
7. The method as claimed in claim 1, wherein in step (1), the titanium sponge and 6-8 niobium strips are used as raw materials, the niobium strips are weighed, and then the titanium sponge is proportioned and weighed according to the nominal composition of the TB14 titanium alloy according to the weight of the 6-8 niobium strips.
8. The method according to claim 1, wherein in step (1), the content of niobium element in the TB14 titanium alloy is 42-47 mass%.
9. The method of claim 1, wherein in step (4), the pressing is performed using a 1200T titanium sponge hydraulic press.
10. The method of claim 1, wherein in step (5), the steps (1) to (4) are repeated to obtain 4 to 10 electrode blocks, and the 4 to 10 electrode blocks are welded into a vacuum consumable electrode for TB14 titanium alloy smelting.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033512A (en) * | 2006-03-07 | 2007-09-12 | 西安赛特金属材料开发有限公司 | Method of producing electrode for titanium alloy vacuum consumable smelting directly added with high melting metal |
| CN102000806A (en) * | 2010-12-13 | 2011-04-06 | 西安群德新材料科技有限公司 | Industrial preparation method of titanium alloy casting ingot with high niobium content |
| WO2017018521A1 (en) * | 2015-07-29 | 2017-02-02 | 新日鐵住金株式会社 | Titanium material for hot rolling |
| CN108070739A (en) * | 2017-12-18 | 2018-05-25 | 西安赛特思迈钛业有限公司 | The preparation method of Ti-6Al-7Nb alloy cast ingots |
| CN108103329A (en) * | 2017-12-18 | 2018-06-01 | 西安赛特思迈钛业有限公司 | A kind of preparation method of TC26 titanium alloy smeltings consutrode |
-
2020
- 2020-06-04 CN CN202010500934.7A patent/CN111560539A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033512A (en) * | 2006-03-07 | 2007-09-12 | 西安赛特金属材料开发有限公司 | Method of producing electrode for titanium alloy vacuum consumable smelting directly added with high melting metal |
| CN102000806A (en) * | 2010-12-13 | 2011-04-06 | 西安群德新材料科技有限公司 | Industrial preparation method of titanium alloy casting ingot with high niobium content |
| WO2017018521A1 (en) * | 2015-07-29 | 2017-02-02 | 新日鐵住金株式会社 | Titanium material for hot rolling |
| CN108070739A (en) * | 2017-12-18 | 2018-05-25 | 西安赛特思迈钛业有限公司 | The preparation method of Ti-6Al-7Nb alloy cast ingots |
| CN108103329A (en) * | 2017-12-18 | 2018-06-01 | 西安赛特思迈钛业有限公司 | A kind of preparation method of TC26 titanium alloy smeltings consutrode |
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