CN113369661A - Heat preservation process method for electron beam welding joint - Google Patents
Heat preservation process method for electron beam welding joint Download PDFInfo
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- CN113369661A CN113369661A CN202110744640.3A CN202110744640A CN113369661A CN 113369661 A CN113369661 A CN 113369661A CN 202110744640 A CN202110744640 A CN 202110744640A CN 113369661 A CN113369661 A CN 113369661A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
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Abstract
The invention discloses a heat preservation process method for an electron beam welding joint, and belongs to the field of electron beam welding processes. By taking a target welding part of an electron beam welding joint as a center, dividing the surface of a material part to be welded into a transition area, a heat preservation area and a marginal area from inside to outside in sequence; welding a titanium skin A on the surface of the transition region, and welding a titanium skin B on the surface of the edge region; laying a high-temperature-resistant heat-insulating material in the heat-insulating area, wrapping the laid high-temperature-resistant heat-insulating material with a titanium sheet C, and welding two sides of the titanium sheet C with the titanium sheet A and the titanium sheet B respectively to form a closed heat-insulating space on the surface of a material part to be welded with the titanium sheet C; after the parts of the materials to be welded are welded in the vacuum chamber, taking out and dismantling the titanium sheet and the high-temperature-resistant heat-insulating materials, and then cleaning welding spots; the heat preservation process method for the material electron beam welding joint is realized. The invention effectively solves the problem that the part cracks when being cooled too fast.
Description
Technical Field
The invention belongs to the field of electron beam welding processes, and relates to a heat preservation process method for an electron beam welding joint.
Background
Ti2The AlNb material is a novel material with light weight and high temperature resistance and is used for replacing nickel-based heat-resisting alloy. Ti2The AlNb material has the advantages of high specific strength, large specific rigidity, good high-temperature mechanical property, good oxidation resistance and the like, and is concerned, but the connection technology is one of the key technologies whether the AlNb material can be applied or not. As a special welding method, electron beam welding has the advantages of good welding accessibility, large penetration depth, good atmosphere, high joint strength, small welding deformation, large welding thickness, wide range of weldable materials and the like, and is increasingly used in the manufacturing process of precision parts. Research finds that Ti is carried out2When AlNb material electron beam welding is carried out, cracks are generated after parts are welded when the cooling speed is high, and the final welding quality of the parts is affected by welding defects.
Disclosure of Invention
In order to overcome the disadvantages of the prior art, the invention aims to provide a heat preservation process method for an electron beam welding joint, which is used for Ti2The heat preservation method for the AlNb material part welding joint by heating before welding and heating after welding solves the problem that the part cracks when the cooling is too fast.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a heat preservation process method of an electron beam welding joint, which comprises the following steps:
1) centering on the target welding part of the electron beam welding joint, and welding Ti to be welded2The surface of the AlNb material part is sequentially divided into a transition region, a heat preservation region and a marginal region from inside to outside;
2) welding a titanium skin A on the surface of the transition region, and welding a titanium skin B on the surface of the edge region;
3) thermal insulation areaSetting a high-temperature-resistant heat-insulating material, wrapping the laid high-temperature-resistant heat-insulating material by using a titanium skin C, and respectively welding two sides of the titanium skin C with a titanium skin A and a titanium skin B to ensure that the titanium skin C is Ti to be welded2A closed heat-insulating space is formed on the surface of the AlNb material part;
4) ti to be welded2After welding the AlNb material part in a vacuum chamber, taking out and dismantling the titanium skin A, the titanium skin B, the titanium skin C and the high-temperature-resistant heat-insulating material, and then cleaning a welding spot; the heat preservation process method for the electron beam welding joint is realized.
Preferably, the titanium skin is TA1 or TC 4.
Preferably, the titanium skin is welded and fixed by energy storage spot welding.
Preferably, the high temperature resistant insulation material comprises carbon felt or aluminum silicate wool.
Preferably, Ti is welded to2The upper surface and the lower surface of the AlNb material part are respectively divided into a transition region, a heat preservation region and an edge region.
Further preferably, Ti is welded to be welded2Welding the same titanium sheet at the edge of the upper surface and the edge of the lower surface of the AlNb material part.
Preferably, the distance between the center of the target welding position and the transition area is 10-20 mm.
Preferably, the thickness of the titanium skin is 0.1-0.2 mm.
Preferably, the thickness of the titanium skin is 0.15 mm.
Preferably, the closed heat-insulating space is filled with high-temperature-resistant heat-insulating materials.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a heat preservation process method of an electron beam welding joint, which is characterized in that Ti is used2The AlNb material adopts stainless steel and other materials to perform energy storage spot welding, so that connection can not be performed, reliable connection can be realized by selecting titanium sheets, and welding spot cracking caused by overhigh temperature can be avoided; high-temperature-resistant heat-insulating material is paved in the area corresponding to the titanium skin of the heat-insulating area, and the titanium skin is used for fixing the high-temperature-resistant heat-insulating material to prevent the high-temperature-resistant heat-insulating material from scattering around to influence the vacuum pumping of the vacuum chamber so as to influence the vacuumPump, while reducing Ti to be welded2Radiation loss of heat from the AlNb material parts. Therefore, the heat preservation process method of the electron beam welding joint can effectively avoid the problem that the qualification rate of parts is influenced because cracks are generated due to too fast cooling.
Furthermore, the high-temperature-resistant heat-insulating material and the Ti to be welded can be effectively welded by adopting an energy storage electric welding mode2The AlNb material parts are connected, so that the operation is convenient, effective and feasible, and the working efficiency is improved. The simultaneous energy storage electric welding process can realize titanium coating and Ti2The AlNb intermetallic compound material is reliably connected and the welding spot does not damage the surface of the part.
Furthermore, the high-temperature resistant heat-insulating material adopts the carbon felt and the aluminum silicate material, can bear the temperature of less than 900 ℃, and can reduce Ti to be welded2The heat of the AlNb material part is dissipated after heating, and the cooling speed of the welding joint is effectively reduced.
Furthermore, the thickness of the titanium skin needs to be 0.1-0.2 mm, the titanium skin is too thin and is easy to tear in the operation process, and the titanium skin cannot be stably and effectively connected when the titanium skin is too thick.
Drawings
FIG. 1 is a schematic diagram of a method according to an embodiment of the present invention.
Wherein: 1-TC 4; 2-welding spots; 3-electron beam welding of the joint; 4-aluminum silicate cotton.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention will be further described with reference to the accompanying drawings in which:
the invention discloses a heat preservation process method of an electron beam welding joint, which can be used for welding Ti to be welded2The structure of the AlNb material part takes the target welding part of the electron beam welding joint as the center and is welded with Ti to be welded2The surface of the AlNb material part is sequentially divided into a transition region, a heat preservation region and a marginal region from inside to outside; welding a titanium skin A on the surface of the transition region, and welding a titanium skin B on the surface of the edge region; laying a high-temperature-resistant heat-insulating material in the heat-insulating area, wrapping the laid high-temperature-resistant heat-insulating material with a titanium skin C, and welding the two sides of the titanium skin C with a titanium skin A and a titanium skin B respectively to enable the titanium skin C to be welded with Ti to be welded2A closed heat-insulating space is formed on the surface of the AlNb material part; ti to be welded2After welding the AlNb material part in a vacuum chamber, taking out and dismantling the titanium skin A, the titanium skin B, the titanium skin C and the high-temperature-resistant heat-insulating material, and then cleaning a welding spot; the heat preservation process method for the electron beam welding joint is realized. On the basis of not influencing assembly and welding, the titanium sheet (TA1 or TC4) with the thickness of 0.1-0.2 mm is selected to be used for fixing the high-temperature-resistant heat-insulating material to prevent the high-temperature-resistant heat-insulating material (carbon felt or aluminum silicate cotton) from scattering everywhere to influence the vacuum pumping of the vacuum chamber so as to influence the vacuum pump, and meanwhile, Ti can be reduced2Radiation loss of heat of AlNb material parts and avoidance of Ti2The AlNb material parts develop cracks.
Wherein, the titanium sheet is welded and fixed through energy storage spot welding.
Specifically, in one embodiment of the present invention, the distance between the center of the target welding portion and the transition region is 10 to 20 mm. The closed heat-insulating space is filled with high-temperature-resistant heat-insulating materials.
Specifically, in one embodiment of the present invention, Ti is to be welded2The upper surface and the lower surface of the AlNb material part are respectively divided into a transition region, a heat preservation region and an edge region. And welding the same titanium sheet aiming at the edge area of the upper surface and the edge area of the lower surface.
In the method, carbon felt or aluminum silicate cotton is selected as a high-temperature-resistant heat-insulating material, and the two high-temperature-resistant heat-insulating materials are subjected to a furnace test at 900 ℃: finding four titanium sheets, respectively wrapping two different high-temperature-resistant heat-insulating materials with the two titanium sheets, sealing the titanium sheets in an energy storage spot welding mode after wrapping the high-temperature-resistant heat-insulating materials, and carrying out furnace-following tests on samples wrapped by the two different high-temperature-resistant heat-insulating materials in a 900 ℃ high-temperature furnace. The verification result shows that the two high-temperature-resistant heat-insulating materials can not change after high temperature, do not disappear or burn due to high temperature, and can stand high temperature to play a heat-insulating role.
A schematic representation of the use of one embodiment of the process of the invention is shown in figure 1. In the method, an energy storage spot welding process is utilized to spot weld the titanium skin 1 on the Ti to be welded2The titanium skin 1 at the periphery of the AlNb material part passes through a welding point 2 and Ti to be welded2And connecting the surfaces of the AlNb material parts. A proper amount of aluminum silicate cotton 4 is filled in the titanium skin 1 to treat Ti welding2And insulating the electron beam welding joint 3 of the AlNb material part.
The present invention is described in further detail below with reference to specific examples:
the invention relates to a heat preservation process method of an electron beam welding joint, which comprises the following steps:
1) according to the Ti to be welded2The structure and the size of the AlNb material part are centered on the target welding part of the electron beam welding joint and welded with Ti to be welded2The surface of the AlNb material part is sequentially divided into a transition region, a heat preservation region and a marginal region from inside to outside; quasi-drugPreparing a titanium skin TC4 with the thickness of 0.15mm, cutting the titanium skin in sections to obtain a titanium skin A, a titanium skin B and a titanium skin C which are respectively matched with the transition region, the heat preservation region and the edge region, and cutting according to the Ti to be welded after cutting2The structure of the AlNb material part is characterized in that titanium skin A, titanium skin B and titanium skin C are respectively subjected to energy storage spot welding until the titanium skin A, the titanium skin B and the titanium skin C do not interfere with Ti to be welded2The transition region, the marginal region and the heat preservation region of the AlNb material part are positioned;
2) after the titanium skin A and the titanium skin B are subjected to energy storage spot welding, wrapping a carbon felt or aluminum silicate cotton by using a titanium skin C;
3) titanium skin C and Ti to be welded by using energy storage spot welding2Fixedly connecting the AlNb material parts, the titanium sheet C, the titanium sheet A and the titanium sheet B, cleaning the whole body after the fixation is finished, and cleaning the redundant materials;
4) welding a titanium skin and wrapping the Ti to be welded with a high-temperature-resistant heat-insulating material2And fixing the AlNb material part on the tool, sending the part into a vacuum chamber for welding, taking out and dismantling the titanium sheet and the wrapping object after the part is welded, and cleaning the energy storage welding spot.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A heat preservation process method of an electron beam welding joint is characterized by comprising the following steps:
1) centering on the target welding part of the electron beam welding joint, and welding Ti to be welded2The surface of the AlNb material part is sequentially divided into a transition region, a heat preservation region and a marginal region from inside to outside;
2) welding a titanium skin A on the surface of the transition region, and welding a titanium skin B on the surface of the edge region;
3) laying a high-temperature-resistant heat-insulating material in the heat-insulating area, wrapping the laid high-temperature-resistant heat-insulating material with a titanium skin C, and welding the two sides of the titanium skin C with a titanium skin A and a titanium skin B respectively to enable the titanium skin C to be welded with Ti to be welded2Surface of AlNb material partA closed heat-insulating space is formed;
4) ti to be welded2After welding the AlNb material part in a vacuum chamber, taking out and dismantling the titanium skin A, the titanium skin B, the titanium skin C and the high-temperature-resistant heat-insulating material, and then cleaning a welding spot; the heat preservation process method for the electron beam welding joint is realized.
2. The method of claim 1, wherein the titanium sheet is TA1 or TC 4.
3. The heat-insulating process method for the electron beam welded joint as claimed in claim 1, wherein the titanium sheet is welded and fixed by energy-storing spot welding.
4. The method of claim 1, wherein the refractory material comprises carbon felt or aluminum silicate wool.
5. The method of claim 1, wherein Ti to be welded is subjected to heat preservation2The upper surface and the lower surface of the AlNb material part are respectively divided into a transition region, a heat preservation region and an edge region.
6. The method for maintaining the temperature of an electron beam welded joint according to claim 5, wherein Ti to be welded is welded2Welding the same titanium sheet at the edge of the upper surface and the edge of the lower surface of the AlNb material part.
7. The heat-insulating process method for the electron beam welding joint as claimed in claim 1, wherein the distance between the center of the target welding part and the transition zone is 10-20 mm.
8. The heat preservation process method of the electron beam welded joint as claimed in claim 1, wherein the thickness of the titanium skin is 0.1-0.2 mm.
9. The method of claim 1, wherein the titanium skin has a thickness of 0.15 mm.
10. The method of claim 1, wherein the enclosed thermal insulation space is filled with a high temperature resistant thermal insulation material.
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| CN207525295U (en) * | 2017-10-30 | 2018-06-22 | 三门峡化工机械有限公司 | A kind of infrared ray stress-removal device |
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| CN207749153U (en) * | 2017-12-26 | 2018-08-21 | 中国石油天然气第一建设有限公司 | A kind of pipeline-weld heat treatment heating and heat insulation integrated device |
| CN211145786U (en) * | 2019-12-10 | 2020-07-31 | 重庆唐工绝热技术有限公司 | Heat insulation covering piece |
| CN112091399A (en) * | 2020-09-21 | 2020-12-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Ti2AlNb material electron beam weld joint micro-crack control method |
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2021
- 2021-06-30 CN CN202110744640.3A patent/CN113369661B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3369142A (en) * | 1965-04-12 | 1968-02-13 | Asea Ab | Device for generating a strong electronic beam from a plasma emitting cathode |
| CN2863344Y (en) * | 2005-11-08 | 2007-01-31 | 中国航空工业第一集团公司北京航空制造工程研究所 | Pipe-plate structure piece clamper for vacuum electron beam braze welding |
| CN103084389A (en) * | 2012-11-06 | 2013-05-08 | 陈建兴 | Cold rolling titanium foil material process |
| CN104841727A (en) * | 2015-05-29 | 2015-08-19 | 宝鸡钛业股份有限公司 | Vacuum creep shape righting method for titanium and titanium alloy panels |
| CN207525295U (en) * | 2017-10-30 | 2018-06-22 | 三门峡化工机械有限公司 | A kind of infrared ray stress-removal device |
| CN207584260U (en) * | 2017-11-15 | 2018-07-06 | 成都龙之泉科技股份有限公司 | A kind of insulation construction for the welding of cold environment pipeline |
| CN207749153U (en) * | 2017-12-26 | 2018-08-21 | 中国石油天然气第一建设有限公司 | A kind of pipeline-weld heat treatment heating and heat insulation integrated device |
| CN211145786U (en) * | 2019-12-10 | 2020-07-31 | 重庆唐工绝热技术有限公司 | Heat insulation covering piece |
| CN112091399A (en) * | 2020-09-21 | 2020-12-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Ti2AlNb material electron beam weld joint micro-crack control method |
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