CN112676777A - Method for recycling titanium alloy lath excess material - Google Patents
Method for recycling titanium alloy lath excess material Download PDFInfo
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- CN112676777A CN112676777A CN202011491664.4A CN202011491664A CN112676777A CN 112676777 A CN112676777 A CN 112676777A CN 202011491664 A CN202011491664 A CN 202011491664A CN 112676777 A CN112676777 A CN 112676777A
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Abstract
The invention discloses a method for recycling titanium alloy strip residual materials, which is characterized in that a plurality of titanium alloy strip residual materials are sequentially spliced by adopting a linear friction welding method to obtain a blank meeting the minimum size requirement required by plate hot rolling production, namely, the width and the length of the blank are both larger than 300 mm. According to the invention, the multiple titanium alloy strip remainders are sequentially spliced by adopting a linear friction welding method, so that joints with hot forming tissues are formed among the titanium alloy strip remainders, the welding efficiency is high, the quality is good, and the blank meeting the minimum size requirement required by plate hot rolling production is obtained and directly used for plate hot rolling, so that the turnover efficiency of the titanium alloy strip remainders is greatly improved, and the production cost is saved; meanwhile, the burning loss of alloy elements caused by the fact that titanium alloy strip residual materials are used as recycling waste materials for smelting is avoided, the waste of blanks is reduced, and the utilization value of the blanks is improved.
Description
Technical Field
The invention belongs to the technical field of titanium alloy processing, and particularly relates to a method for recycling titanium alloy batten residual materials.
Background
The titanium alloy has the characteristics of light weight, high specific strength, corrosion resistance and the like, and is increasingly applied to the fields of aviation, aerospace, oceans, chemical engineering and the like. With the great increase of the amount of titanium alloy plates, how to recycle the plate strip residual materials more quickly and efficiently becomes increasingly important. Generally, the residual material of the strip is about 200-400 kg and accounts for 20-40% when 1000kg of titanium alloy sheet is produced. In industrial production, the maximum dimension of the strip-shaped remnant in the length or width direction is generally below 300mm, while the minimum rollable dimension of a conventional plate rolling mill is: both the width and the length are larger than 300 mm. Thus, the titanium alloy strip remnant cannot be rolled directly as a billet into a thinner gauge sheet material, subject to the minimum rollable size.
Because titanium has high chemical activity, is oxidized and breathed in at high temperature, a heat affected zone is large when the titanium is welded by adopting a conventional method, the structure of a welding seam is coarsened, and the difference from the body structure is large; moreover, carbides, nitrides, oxides, and the like are easily formed at the weld, and a welding embrittlement phenomenon occurs. Therefore, for a finished plate with high requirement on structural uniformity and large dimension specification, the lath-shaped excess materials can not be directly spliced by adopting conventional welding to be delivered as the finished plate. At present, strip-shaped excess materials of titanium alloy plates are generally added as recycled waste materials and are used for smelting titanium alloy ingots. The recovery mode ensures that expensive alloy elements in the titanium alloy strip residual material are smelted and burned, and a plate blank is prepared by hot forging forming subsequently, so that the recovery period is long and the efficiency is low; meanwhile, the maturity of the existing titanium alloy residue recovery technology in China is not high, the application field of adding residue to prepare the plate is limited, and the materials are not accepted in the fields of aerospace, equipment manufacturing with harsh use conditions and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for recycling titanium alloy lath excess material aiming at the defects of the prior art. The method adopts a linear friction welding method to splice a plurality of titanium alloy strip remainders in sequence, so that joints with hot forming tissues are formed among the titanium alloy strip remainders, the welding efficiency is high, the quality is good, and the blank meeting the minimum size requirement required by plate hot rolling production is obtained and directly used for plate hot rolling, so that the turnover efficiency of the titanium alloy strip remainders is greatly improved, and the production cost is saved.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for recycling titanium alloy strip remainders is characterized in that a plurality of titanium alloy strip remainders are sequentially spliced by adopting a linear friction welding method to obtain a blank meeting the minimum size requirement required by plate hot rolling production, namely, the width and the length of the blank are both larger than 300 mm.
Linear friction welding is a solid phase welding method, under the action of welding pressure, one welding piece makes linear reciprocating motion along a linear direction with certain amplitude and frequency relative to the other welding piece, friction bonding and shearing occur and friction heat is generated, the temperature of a friction interface rises, when a friction surface reaches a viscoplastic state, metal in a welding area generates plastic flow to form flash under the action of pressure, after the temperature and deformation of the friction welding area reach certain degrees, the welding pieces are aligned and apply upsetting pressure, and the metal in the welding area is welded into a whole through mutual diffusion and recrystallization, so that the whole welding process is completed.
According to the invention, according to the shape characteristics that the residual titanium alloy strip has narrow width and short length, a plurality of titanium alloy strip residual materials are sequentially spliced by adopting a linear friction welding method, so that a joint with a hot forming structure is formed between the titanium alloy strip residual materials, the welding efficiency is high, the quality is good, and a blank meeting the minimum size requirement required by plate hot rolling production, namely the width and the length of the blank are both more than 300mm is obtained and directly used for plate hot rolling, thereby greatly improving the turnover efficiency of the titanium alloy strip residual materials and saving the production cost.
The method for recycling the titanium alloy lath excess materials is characterized in that a plurality of titanium alloy lath excess materials are cut to be identical in size in the width direction or the length direction and flush with one end face corresponding to the length direction or the width direction, and then the titanium alloy lath excess materials are sequentially spliced along the direction perpendicular to the flush end faces. By adopting the optimal cutting processing mode and the splicing direction, the sizes of the residual materials of the plurality of titanium alloy strips after cutting processing are effectively adjusted, the residual materials are easy to splice, a blank convenient for hot rolling is formed, the splicing efficiency is improved, and the quality of the blank is improved.
The method for recycling the titanium alloy strip residual material is characterized in that the titanium alloy strip residual material is a stub bar or an edge bar of a titanium alloy plate, and the length and width of the titanium alloy strip residual material cannot meet the minimum size requirement required by hot rolling production. The recovery method is suitable for the stub bars or the edge strips with lower utilization value in the actual production, and has wide application range and strong practicability.
The method for recycling the titanium alloy batten excess materials is characterized in that the number of the titanium alloy batten excess materials is not less than two.
The method for recycling the titanium alloy batten residual material is characterized in that the thickness of the titanium alloy batten residual material is 10-100 mm, and the width or the length of the titanium alloy batten residual material is not more than 300 mm.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the plurality of titanium alloy strip remainders are sequentially spliced by adopting a linear friction welding method, so that the joints with the hot forming tissues are formed among the titanium alloy strip remainders, the welding efficiency is high, the quality is good, and the blank meeting the minimum size requirement required by the plate hot rolling production is obtained and directly used for plate hot rolling, so that the turnover efficiency of the titanium alloy strip remainders is greatly improved, and the production cost is saved.
2. According to the invention, the blanks spliced by linear friction welding are directly subjected to hot rolling production, so that the burning loss of alloy elements caused by using titanium alloy strip remainders as recycled wastes for smelting is avoided, the waste of the blanks is reduced, and the utilization value of the blanks is improved.
3. The recovery method is quick and efficient, and improves the utilization value of the titanium alloy batten residual material.
The technical solution of the present invention is further described in detail by examples below.
Detailed Description
Example 1
The embodiment comprises the following steps:
preparing two TC4 titanium alloy strip remainders, wherein the thicknesses of the two TC4 titanium alloy strip remainders are 10mm, the widths of the two TC4 titanium alloy strip remainders are 300mm, and the lengths of the two TC4 titanium alloy strip remainders are larger than 700 mm;
step two, cutting the two TC4 titanium alloy strip remainders prepared in the step one by adopting water jet cutting, so that the two TC4 titanium alloy strip remainders have the same size in the length direction, and one end face corresponding to the width is flush;
and step three, splicing the two TC4 titanium alloy strip remainders subjected to cutting treatment in the step two in sequence along the direction perpendicular to the flush end face by adopting a linear friction welding method, and then removing welding seam burrs by adopting a polishing mode to obtain a blank, wherein the thickness of the blank is 10mm, the width of the blank is 600mm, and the length of the blank is more than 700 mm.
Example 2
The embodiment comprises the following steps:
preparing three TC4 titanium alloy strip remainders, wherein the thickness of each of the three TC4 titanium alloy strip remainders is 50mm, the width of each of the three TC4 titanium alloy strip remainders is greater than 1000mm, and the length of each of the three TC4 titanium alloy strip remainders is 200 mm;
cutting the three TC4 titanium alloy strip remnants prepared in the step one by using a shearing machine so that the three TC4 titanium alloy strip remnants have the same size in the width direction and one end face with the corresponding length is flush;
and step three, sequentially splicing the three TC4 titanium alloy strip remainders subjected to cutting treatment in the step two in a direction perpendicular to the flush end face by adopting a linear friction welding method, and then removing welding seam burrs by adopting a polishing mode to obtain a blank, wherein the thickness of the blank is 50mm, the width of the blank is more than 1000mm, and the length of the blank is 600 mm.
Example 3
The embodiment comprises the following steps:
preparing five TA15 titanium alloy strip remainders, wherein the thickness of each of the five TA15 titanium alloy strip remainders is 70mm, the width is greater than 500mm, and the length is 150 mm;
step two, cutting five TA15 titanium alloy strip remainders prepared in the step one by adopting water jet cutting, so that the five TA15 titanium alloy strip remainders have the same size in the width direction, and one end face of the corresponding length is flush;
and step three, splicing the five cut and processed TA15 titanium alloy strip remainders in the step two in sequence along the direction perpendicular to the flush end face by adopting a linear friction welding method, and then removing welding seam burrs by adopting a polishing mode to obtain a blank, wherein the thickness of the blank is 70mm, the width of the blank is more than 500mm, and the length of the blank is 750 mm.
Example 4
The embodiment comprises the following steps:
preparing six TA15 titanium alloy strip remainders, wherein the thickness of each of the six TA15 titanium alloy strip remainders is 100mm, the width of each of the six TA15 titanium alloy strip remainders is 100mm, and the length of each of the six TA15 titanium alloy strip remainders is greater than 500 mm;
cutting the six TA15 titanium alloy strip remnants prepared in the step one by adopting water jet cutting, so that the six TA15 titanium alloy strip remnants have the same size in the length direction and one end face with the corresponding width is flush;
and step three, sequentially splicing the six TA15 titanium alloy strip remainders subjected to cutting treatment in the step two in a direction perpendicular to the flush end face by adopting a linear friction welding method, and then removing welding seam burrs by adopting a polishing mode to obtain a blank, wherein the thickness of the blank is 100mm, the width of the blank is 600mm, and the length of the blank is more than 500 mm.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (5)
1. A method for recycling titanium alloy strip remainders is characterized in that a plurality of titanium alloy strip remainders are sequentially spliced by adopting a linear friction welding method to obtain a blank meeting the minimum size requirement required by plate hot rolling production, namely, the width and the length of the blank are both larger than 300 mm.
2. The method for recycling the titanium alloy strip residual material as claimed in claim 1, wherein the plurality of titanium alloy strip residual materials are cut to have the same size in the width direction or the length direction and have a flush end surface corresponding to the length direction or the width direction, and then the titanium alloy strip residual materials are sequentially spliced along a direction perpendicular to the flush end surface.
3. The method of claim 1, wherein the titanium alloy strip remnant is a stub or a side bar of a titanium alloy plate, and the length and width dimensions of the titanium alloy strip remnant cannot meet the minimum dimension requirements for hot rolling production.
4. The method of recycling titanium alloy strip scrap according to claim 1, wherein the titanium alloy strip scrap is not less than two in number.
5. The method of recycling titanium alloy strip scrap according to claim 1, wherein the titanium alloy strip scrap has a thickness of 10mm to 100mm and a width or length of no more than 300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011491664.4A CN112676777A (en) | 2020-12-17 | 2020-12-17 | Method for recycling titanium alloy lath excess material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011491664.4A CN112676777A (en) | 2020-12-17 | 2020-12-17 | Method for recycling titanium alloy lath excess material |
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| CN112676777A true CN112676777A (en) | 2021-04-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101918156A (en) * | 2008-01-04 | 2010-12-15 | G·詹姆斯澳大利亚股份有限公司 | The method of the heated former material segmentation of welding in aluminium extrusion technology |
| CN102773243A (en) * | 2012-07-27 | 2012-11-14 | 济钢集团有限公司 | Method for producing medium and thick plates by utilizing waste steel plates |
| CN105750839A (en) * | 2016-04-20 | 2016-07-13 | 北京航空航天大学 | Combining and manufacturing method of titanium alloy curvature component with ribs |
| CN105879971A (en) * | 2016-04-22 | 2016-08-24 | 佳木斯大学 | Material throwing head based on double-liquid metal fusion welding technology and preparation method of material throwing head |
| CN108620435A (en) * | 2018-03-16 | 2018-10-09 | 洛阳双瑞精铸钛业有限公司 | A method of rate must be expected by improving hot rolled plate using titanium or titanium alloy hot rolling material head |
-
2020
- 2020-12-17 CN CN202011491664.4A patent/CN112676777A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101918156A (en) * | 2008-01-04 | 2010-12-15 | G·詹姆斯澳大利亚股份有限公司 | The method of the heated former material segmentation of welding in aluminium extrusion technology |
| CN102773243A (en) * | 2012-07-27 | 2012-11-14 | 济钢集团有限公司 | Method for producing medium and thick plates by utilizing waste steel plates |
| CN105750839A (en) * | 2016-04-20 | 2016-07-13 | 北京航空航天大学 | Combining and manufacturing method of titanium alloy curvature component with ribs |
| CN105879971A (en) * | 2016-04-22 | 2016-08-24 | 佳木斯大学 | Material throwing head based on double-liquid metal fusion welding technology and preparation method of material throwing head |
| CN108620435A (en) * | 2018-03-16 | 2018-10-09 | 洛阳双瑞精铸钛业有限公司 | A method of rate must be expected by improving hot rolled plate using titanium or titanium alloy hot rolling material head |
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