CN103252568A - Technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder - Google Patents
Technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder Download PDFInfo
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Abstract
The invention discloses a technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder. According to the technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder, the high-entropy alloy powder is mainly composed of AlFeCuCoNiTiCrx, wherein the x is molar ratio of the Al to the Cr and is between 0 to 0.3, and the size of the powder is 100-300 meshes. When high-entropy alloy powder media are used as a filling layer, the contact resistance of a stainless steel material which are different to weld at the early welding stage is improved, resistance heat is used as a welding heat source, partial melting of the surface of the material to be welded is achieved under the protection of protective air and under the action of the resistance heat, an oxidation film can be broken under the impact effect of proper electrode pressure, refining of the high-entropy alloy powder media can be achieved on the interface of the material to be welded, a molten core and a single face-centered cubic tissue are formed on the interface, and then the strength and the corrosion resistance of a connector are improved. The technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder has the advantages that welding can be achieved under the thermal compensation condition, the flexibility is strong, and ideal engineering significance is achieved.
Description
Technical field
The present invention relates to the stainless steel welding field, especially relate to a kind of for filling the stainless process of spot welding stainless steel high-entropy alloy powder and a kind of high-entropy alloy powder filling spot welding.
Background technology
Stainless steel is subjected to the attention of industrial circle as resistant material always, and the spot-welded on method is one of main method of connecting of stainless steel.Research about stainless steel spot welding at present mainly comprises argon arc welding, laser beam, electron beam, friction stir spot welding, but above-mentioned spot welding method energy resource consumption is big, production efficiency is low, equipment and maintenance and operating cost height, comparatively speaking, the resistance spot welding stainless steel is a kind of selection of excellence, but electric resistance welding stainless steel postwelding forms nugget and undergoes phase transition, thereby cause in use being corroded easily, cause welding point to lose efficacy, so be badly in need of a kind of method that can improve electric resistance of stainless spot welding corrosion resistance of exploitation.
Find through the literature search to prior art, patent 200510072511.5 is used intermediate sheet annulus soldering stainless steel, but the conductive capability of thin discs is not too strong, the material of thin discs is the stainless steel homogeneous material simultaneously, under the high electric current effect of resistance spot welding, form ferrite easily, thereby corrosion resistance descends.The size that patent 201110028353.9 changes electrode improves welding effect, but has increased devices consume.So be badly in need of a kind of method that can improve electric resistance of stainless spot welding intensity and corrosion resistance under the existing equipment condition that do not change of exploitation at present.
Summary of the invention
Purpose of the present invention is exactly to propose in order to overcome the defective that above-mentioned prior art exists a kind ofly to fill the stainless process of spot welding for filling spot welding stainless steel high-entropy alloy powder and a kind of high-entropy alloy powder, to realize improving electric resistance of stainless spot welding intensity and corrosion resistance purpose.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of for filling spot welding stainless steel high-entropy alloy powder, it is characterized in that the key component of described high-entropy alloy powder is AlFeCuCoNiTiCr
x, x is the mol ratio of Al and Cr, and the scope of x is 0-0.3, and the powder size is the 100-300 order.
A kind of high-entropy alloy powder is filled the stainless process of spot welding, carries out according to the following steps:
(1) the high-entropy alloy powder is mixed with organic solvent;
(2) evenly spray or evenly apply described powder medium at the solder side of workpiece to be welded, form the uniform powder medium packed layer of thickness;
(3) treat the acetone volatilization of powder medium packed layer after, clamping workpiece to be welded closely contacts the workpiece solder side to be welded of attaching powder medium between upper/lower electrode;
(4) adjust the protection gas jets and aim at workpiece to be welded weld zone, apply the protective gas effect;
(5) apply electrode pressure and impact, compress to be welded, make the surface film oxide fragmentation of matrix and the effect that in the subsequent technique process, keep-ups pressure by the electrode pressure percussion;
(6) logical welding current makes the high-entropy alloy powder medium fusing of packed layer, reacts with stainless steel generation physical and chemical metallurgy under heat and pressure comprehensive function, and produces the atom diffusion at weld interface;
(7) stop the welding current effect, keep electrode pressure to weldment to cool off naturally;
(8) stop the electrode pressure effect, stop the protective gas effect, upper/lower electrode is removed, and finishes welding.
Described organic solvent comprises acetone and ethanol etc.
Welding surroundings is mainly under the inert gas shielding and welds, and also can weld under atmosphere under the individual cases.
Described workpiece to be welded is stainless steel materials or wire rod, and the welding point form mainly is lap joint.
The described welder's for the treatment of part and powder packed layer be heated to be resistance heated.Workpiece to be welded and the powder packed layer fuel factor that has a resistance under the welding current effect, welding current are that single main welding current form or main welding current add auxiliary welding current form.
The described end face of welding electrode up and down is mainly sphere shape, in addition, also can adopt truncated cone.
Compared with prior art, the present invention has the following advantages:
(1) powder medium of certain particle size and surface of the work to be welded form some somes contact interfaces, utilize the variation of the contact-making surface of powder particle and material to be welded to improve the welding initial stage contact resistance at material position to be welded, thereby improve the weldability of difficult wlding material.
(2) constitute some small relatively conductive channels between the powder particle, under the prerequisite that does not increase the welding current absolute value, the current density by material position to be welded is greatly improved, thereby obtain needed a large amount of resistance heats of welding initial stage.
(3) utilize the oxide-film of the broken filling interface of effect of electrode pressure.
(4) utilize the squeezing action of sphere shape electrode, and under the convection action of fusion, discharge broken oxide-film, thereby form reliable welding point.
(5) high-entropy alloy powder filled media prescription is flexible, can improve the metallurgical behavior of weld metal.
(6) welding of realization stainless steel material under inert gas shielding or under the atmospheric environment, face of weld need not special cleaning, the welding efficiency height, cost is low, and joint is reliable, has comparatively desirable engineering Practical significance.
(7) the high-entropy alloy powder forms single face-centered cubic solid solution tissue in stainless joint, has well corrosion-resistant and strengthening effect.
Description of drawings
Fig. 1 is that stainless steel is filled high-entropy alloy powder spot welding schematic diagram, wherein, and the 1-electrode; The 2-stainless steel work-piece; 3-high-entropy alloy packed layer; The 4-welding circuit.
The specific embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1:
The clamping of material to be welded is pulse electric current welding procedure respectively as shown in Figure 1.304 stainless steel work-pieces 2 are two overlap joints that thickness is the slab construction of 0.8mm.With high-entropy alloy powder 200 order AlFeCuCoNiTiCr
0.1After medium mixes with acetone, evenly be sprayed at the surface at stainless steel work-piece 2 positions to be welded by pressure sprayer, form powder medium packed layer 3.Setting main welding four parameters is: welding current I=12000A, electrode pressure F=1860N, welding current duration t2=1.3s.After treating the acetone volatilization of powder packed layer, with flat panel workpieces overlap joint to be welded, be clamped between the upper/lower electrode 1.To protect gas jets to aim at the weld zone, and open argon shield, throughput is 3L/min.Apply electrode pressure, make workpiece pressing to be welded tight.Keep the effect of electrode pressure, apply welding current, the duration is 1.5s.After the welding current effect finishes, keep electrode pressure 2s, to the welding end.Close argon shield, remove the argon gas nozzle, and remove upper/lower electrode 1, take off workpiece, through metallographic observation, joint forms single face-centered cubic tissue.
Embodiment 2:
The clamping of material to be welded is pulse electric current welding procedure respectively as shown in Figure 1.304 stainless steel work-pieces 2 are two overlap joints that thickness is the slab construction of 0.4mm.With high-entropy alloy powder 250 order AlFeCuCoNiTiCr
0.15After medium mixes with alcohol, evenly be sprayed at the surface at stainless steel work-piece 2 positions to be welded by pressure sprayer, form powder medium packed layer 3.Setting main welding four parameters is: welding current I=10000A, electrode pressure F=1560N, welding current duration t2=1.3s.After treating the acetone volatilization of powder packed layer, with flat panel workpieces overlap joint to be welded, be clamped between the upper/lower electrode 1.To protect gas jets to aim at the weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.Keep the effect of electrode pressure, apply welding current, the duration is 1.2s.After the welding current effect finishes, keep the electrode pressure certain hour, to the welding end.Close argon shield, remove the argon gas nozzle, and remove upper/lower electrode 1, take off workpiece, through metallographic observation, joint forms single face-centered cubic tissue.
Embodiment 3:
The clamping of material to be welded is pulse electric current welding procedure respectively as shown in Figure 1.304 stainless steel work-pieces 2 are two overlap joints that thickness is the slab construction of 1mm.With high-entropy alloy powder 300 order AlFeCuCoNiTiCr
0.2After medium mixes with alcohol, evenly be sprayed at the surface at stainless steel work-piece 2 positions to be welded by pressure sprayer, form powder medium packed layer 3.Setting main welding four parameters is: welding current I=13000A, electrode pressure F=1960N, welding current duration t2=1.3s.After treating the acetone volatilization of powder packed layer, with flat panel workpieces overlap joint to be welded, be clamped between the upper/lower electrode 1.To protect gas jets to aim at the weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.Keep the effect of electrode pressure, apply welding current, the duration is 1.5s.After the welding current effect finishes, keep electrode pressure 2s, to the welding end.Close argon shield, remove the argon gas nozzle, and remove upper/lower electrode 1, take off workpiece, through metallographic observation, joint forms single face-centered cubic tissue.
Embodiment 4:
The clamping of material to be welded is pulse electric current welding procedure respectively as shown in Figure 1.304 stainless steel work-pieces 2 are two overlap joints that thickness is the slab construction of 1.2mm.With high-entropy alloy powder 300 order AlFeCuCoNiTiCr
0.3After medium mixes with alcohol, evenly be sprayed at the surface at stainless steel work-piece 2 positions to be welded by pressure sprayer, form powder medium packed layer 3.Setting main welding four parameters is: welding current I=13500A, electrode pressure F=1960N, welding current duration t2=2.3s.After treating the acetone volatilization of powder packed layer, with flat panel workpieces overlap joint to be welded, be clamped between the upper/lower electrode 1.To protect gas jets to aim at the weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.Keep the effect of electrode pressure, apply welding current, the duration is 1.5s.After the welding current effect finishes, keep electrode pressure 2s, to the welding end.Close argon shield, remove the argon gas nozzle, and remove upper/lower electrode 1, take off workpiece, through metallographic observation, joint forms single face-centered cubic tissue.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment.So everyly do not break away from the equivalence of finishing under the principles of this disclosure or revise, all fall into the scope of protection of the invention.
Claims (5)
1. one kind is used for filling spot welding stainless steel high-entropy alloy powder, it is characterized in that the key component of described high-entropy alloy powder is AlFeCuCoNiTiCr
x, x is the mol ratio of Al and Cr, and the scope of x is 0-0.3, and the powder size is the 100-300 order.
2. a high-entropy alloy powder is filled the stainless process of spot welding, it is characterized in that, carries out according to the following steps:
(1) the described high-entropy alloy powder medium of claim 1 is mixed with organic solvent;
(2) evenly spray or evenly apply described powder medium at the solder side of workpiece to be welded, form the uniform powder medium packed layer of thickness;
(3) treat the organic solvent volatilization of powder medium packed layer after, clamping workpiece to be welded closely contacts the workpiece solder side to be welded of attaching powder medium between upper/lower electrode;
(4) adjust the protection gas jets and aim at workpiece to be welded weld zone, apply the protective gas effect;
(5) apply electrode pressure and impact, compress to be welded, make the fragmentation of matrix surface oxide-film and the effect that in the subsequent technique process, keep-ups pressure by the electrode pressure percussion;
(6) logical welding current is melted in the stainless steel high-entropy alloy powder medium of packed layer, reacts under pressure, and produces diffusion at weld interface;
(7) stop the welding current effect, keep electrode pressure to weldment to cool off naturally;
(8) stop the electrode pressure effect, stop the protective gas effect, upper/lower electrode is removed, and finishes welding.
3. high-entropy alloy powder according to claim 1 is filled the stainless process of spot welding, it is characterized in that described workpiece to be welded is stainless steel materials or wire rod, and the welding point form is lap joint.
4. high-entropy alloy powder according to claim 1 is filled the stainless process of spot welding, it is characterized in that, the described end face of welding electrode up and down is sphere shape or truncated cone.
5. high-entropy alloy powder according to claim 1 is filled the stainless process of spot welding, it is characterized in that described organic solvent comprises acetone and ethanol.
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Cited By (11)
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| CN105269161A (en) * | 2014-07-08 | 2016-01-27 | 通用汽车环球科技运作有限责任公司 | Current schedule for optimized reaction metallurgical joining |
| CN105671545A (en) * | 2016-01-26 | 2016-06-15 | 山东科技大学 | High-hardness, single-phase and high-entropy alloy coating and preparation method and application thereof |
| CN105950947A (en) * | 2016-07-06 | 2016-09-21 | 浙江亚通焊材有限公司 | Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof |
| CN107138840A (en) * | 2016-03-01 | 2017-09-08 | 通用汽车环球科技运作有限责任公司 | Spot welding |
| US20180036840A1 (en) * | 2016-08-04 | 2018-02-08 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN109967850A (en) * | 2019-04-23 | 2019-07-05 | 贵州理工学院 | A kind of connection method of the resistance spot welding of CoCrCuFeNi high-entropy alloy |
| CN109967812A (en) * | 2019-04-04 | 2019-07-05 | 贵州理工学院 | A kind of soldering connecting method of CoCrCuFeNi high-entropy alloy |
| CN112171036A (en) * | 2020-09-11 | 2021-01-05 | 北京汽车研究总院有限公司 | Welding method |
| US11318566B2 (en) | 2016-08-04 | 2022-05-03 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11339817B2 (en) | 2016-08-04 | 2022-05-24 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11511375B2 (en) | 2020-02-24 | 2022-11-29 | Honda Motor Co., Ltd. | Multi component solid solution high-entropy alloys |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107138840A (en) * | 2016-03-01 | 2017-09-08 | 通用汽车环球科技运作有限责任公司 | Spot welding |
| CN105950947A (en) * | 2016-07-06 | 2016-09-21 | 浙江亚通焊材有限公司 | Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof |
| US11318566B2 (en) | 2016-08-04 | 2022-05-03 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN107685184A (en) * | 2016-08-04 | 2018-02-13 | 本田技研工业株式会社 | More material components and its manufacture method |
| US10640854B2 (en) * | 2016-08-04 | 2020-05-05 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US20180036840A1 (en) * | 2016-08-04 | 2018-02-08 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11339817B2 (en) | 2016-08-04 | 2022-05-24 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11535913B2 (en) | 2016-08-04 | 2022-12-27 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN109967812A (en) * | 2019-04-04 | 2019-07-05 | 贵州理工学院 | A kind of soldering connecting method of CoCrCuFeNi high-entropy alloy |
| CN109967850A (en) * | 2019-04-23 | 2019-07-05 | 贵州理工学院 | A kind of connection method of the resistance spot welding of CoCrCuFeNi high-entropy alloy |
| US11511375B2 (en) | 2020-02-24 | 2022-11-29 | Honda Motor Co., Ltd. | Multi component solid solution high-entropy alloys |
| CN112171036A (en) * | 2020-09-11 | 2021-01-05 | 北京汽车研究总院有限公司 | Welding method |
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