CN103252568B - A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding - Google Patents
A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding Download PDFInfo
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Abstract
The invention discloses a kind of for filling spot welding stainless steel high-entropy alloy powder with it for filling the stainless process of spot welding, 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 size of powder particles is 100-300 order; With high-entropy alloy powder medium as packed layer; improve the welding initial stage contact resistance of difficult weldering stainless steel material; take resistance heat as welding heat source; under the protection of protective gas and the effect of resistance heat; the partial melting of generating material welding surface simultaneously; under the electrode pressure percussion of suitable size; make oxide-film broken; promote that high-entropy alloy powder medium produces refining effect at material interface place to be welded; form nugget in interface and form single face-centred cubic tissue, thus improve strength of joint and corrosion resistance.The method mainly realizes welding under thermal compensation, and flexibility is comparatively strong, has ideal engineering significance.
Description
Technical field
The present invention relates to stainless steel welded field, especially relating to a kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding.
Background technology
Stainless steel is subject to the attention of industrial circle as resistant material always, and spot-welded method is one of main method of stainless steel connection.Research at present about stainless steel spot welding mainly comprises argon arc welding, laser beam, electron beam, friction stir spot welding, but above-mentioned spot welding method energy resource consumption is large, production efficiency is low, equipment and safeguard and operating cost high, comparatively speaking, 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, thus cause in use easily being corroded, welding point is caused 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.
Through finding the literature search of prior art, patent 200510072511.5 uses intermediate sheet annulus soldering stainless steel, but the conductive capability of thin discs is not too strong, the material of thin discs is stainless steel homogeneous material simultaneously, under resistance spot welding height electric current effect, easily form ferrite, thus corrosion resistance declines.The size that patent 201110028353.9 changes electrode improves welding effect, but adds devices consume.So the method for electric resistance of stainless spot welding intensity and corrosion resistance can be improved under being badly in need of at present that exploitation is a kind of and not changing existing equipment condition.
Summary of the invention
Object of the present invention be exactly propose to overcome defect that above-mentioned prior art exists a kind of for filling spot welding stainless steel high-entropy alloy powder and a kind of high-entropy alloy powder fills the stainless process of spot welding, to realize improving electric resistance of stainless spot welding intensity and corrosion resistance object.
Object 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 size of powder particles is 100-300 order.
A kind of high-entropy alloy powder fills the stainless process of spot welding, carries out according to the following steps:
(1) high-entropy alloy powder organic solvent is mixed;
(2) evenly spray or powder medium described in even application at the solder side of workpiece to be welded, form the uniform powder medium packed layer of thickness;
(3) after the acetone volatilization of powder medium packed layer, clamping workpiece to be welded, between upper/lower electrode, makes the workpiece solder side close contact to be welded of attaching powder medium;
(4) adjustment protection gas jets aims at workpiece weld zone to be welded, applies protective gas effect;
(5) apply electrode pressure to impact, compress junction to be welded, make the surface film oxide of matrix broken by electrode pressure percussion, and in subsequent technique process, keep the effect of pressure;
(6) logical welding current, makes the high-entropy alloy powder melting media of packed layer, reacts under heat with pressure comprehensive function with stainless steel generation physical and chemical metallurgy, and produces atoms permeating at weld interface;
(7) stop welding current effect, holding electrode pressure cools naturally to weldment;
(8) stop electrode pressure effect, stop protective gas effect, upper/lower electrode is removed, and completes welding.
Described organic solvent comprises acetone and ethanol etc.
Welding surroundings is mainly welding under inert gas shielding, also can in welding under air under individual cases.
Described workpiece to be welded is stainless steel materials or wire rod, welding point form mainly 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 powder packed layer produce resistance heat effect under welding current effect, and welding current is that single main welding current form or main welding current add auxiliary welding current forms.
The end face of described welding electrode is up and down mainly spheric, 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 point cantact interfaces, utilize powder particle and the change of the contact surface of material to be welded to improve initial stage of the welding contact resistance at material position to be welded, thus improve the weldability of difficult wlding material.
(2) form some relatively small conductive channels between powder particle, under the prerequisite not increasing welding current absolute value, make to be greatly improved by the current density at material position to be welded, thus obtain a large amount of resistance heats required for the welding initial stage.
(3) oxide-film of the broken filling interface of the effect of electrode pressure is utilized.
(4) utilize the squeezing action of spheric electrode, and under the convection action of melting, discharge broken oxide-film, thus form reliable welding point.
(5) high-entropy alloy powder filled media formula is flexible, can improve the metallurgical behavior of weld metal.
(6) under inert gas shielding or under atmospheric environment, realize the welding of stainless steel material, face of weld is without the need to special cleaning, and welding efficiency is high, and cost is low, and joint is reliable, has ideal Practical meaning.
(7) high-entropy alloy powder forms single face-centered cubic solid solution tissue in stainless joint, has well corrosion-resistant and strengthening effect.
Accompanying drawing explanation
Fig. 1 is that high-entropy alloy powder spot welding schematic diagram filled by stainless steel, wherein, and 1-electrode; 2-stainless steel work-piece; 3-high-entropy alloy packed layer; 4-welding circuit.
Detailed description of the invention
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give 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 respectively as shown in Figure 1, is single-pulse current welding procedure.The overlap joint of 304 stainless steel work-pieces 2 to be two pieces of thickness the be slab construction of 0.8mm.By high-entropy alloy powder 200 order AlFeCuCoNiTiCr
0.1after medium acetone mixes, be evenly sprayed at the surface at stainless steel work-piece 2 position to be welded by pressure sprayer, form powder medium packed layer 3.The main welding of setting four parameters are: welding current I=12000A, electrode pressure F=1860N, welding current duration t2=1.3s.After the acetone volatilization of powder packed layer, flat panel workpieces to be welded is overlapped, is clamped between upper/lower electrode 1.Gas jets will be protected to aim at weld zone, and open argon shield, throughput is 3L/min.Apply electrode pressure, make workpiece pressing to be welded tight.The effect of holding electrode pressure, apply welding current, the duration is 1.5s.After welding current effect terminates, holding electrode pressure 2s, to welding end.Close argon shield, remove argon 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 respectively as shown in Figure 1, is single-pulse current welding procedure.The overlap joint of 304 stainless steel work-pieces 2 to be two pieces of thickness the be slab construction of 0.4mm.By high-entropy alloy powder 250 order AlFeCuCoNiTiCr
0.15after medium alcohol mixes, be evenly sprayed at the surface at stainless steel work-piece 2 position to be welded by pressure sprayer, form powder medium packed layer 3.The main welding of setting four parameters are: welding current I=10000A, electrode pressure F=1560N, welding current duration t2=1.3s.After the acetone volatilization of powder packed layer, flat panel workpieces to be welded is overlapped, is clamped between upper/lower electrode 1.Gas jets will be protected to aim at weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.The effect of holding electrode pressure, apply welding current, the duration is 1.2s.After welding current effect terminates, holding electrode pressure certain hour, to welding end.Close argon shield, remove argon 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 respectively as shown in Figure 1, is single-pulse current welding procedure.The overlap joint of 304 stainless steel work-pieces 2 to be two pieces of thickness the be slab construction of 1mm.By high-entropy alloy powder 300 order AlFeCuCoNiTiCr
0.2after medium alcohol mixes, be evenly sprayed at the surface at stainless steel work-piece 2 position to be welded by pressure sprayer, form powder medium packed layer 3.The main welding of setting four parameters are: welding current I=13000A, electrode pressure F=1960N, welding current duration t2=1.3s.After the acetone volatilization of powder packed layer, flat panel workpieces to be welded is overlapped, is clamped between upper/lower electrode 1.Gas jets will be protected to aim at weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.The effect of holding electrode pressure, apply welding current, the duration is 1.5s.After welding current effect terminates, holding electrode pressure 2s, to welding end.Close argon shield, remove argon 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 respectively as shown in Figure 1, is single-pulse current welding procedure.The overlap joint of 304 stainless steel work-pieces 2 to be two pieces of thickness the be slab construction of 1.2mm.By high-entropy alloy powder 300 order AlFeCuCoNiTiCr
0.3after medium alcohol mixes, be evenly sprayed at the surface at stainless steel work-piece 2 position to be welded by pressure sprayer, form powder medium packed layer 3.The main welding of setting four parameters are: welding current I=13500A, electrode pressure F=1960N, welding current duration t2=2.3s.After the acetone volatilization of powder packed layer, flat panel workpieces to be welded is overlapped, is clamped between upper/lower electrode 1.Gas jets will be protected to aim at weld zone, and open argon shield, throughput is 4L/min.Apply electrode pressure, make workpiece pressing to be welded tight.The effect of holding electrode pressure, apply welding current, the duration is 1.5s.After welding current effect terminates, holding electrode pressure 2s, to welding end.Close argon shield, remove argon 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 content disclosed in this embodiment.The equivalence completed under not departing from principles of this disclosure so every or amendment, all fall into the scope of protection of the invention.
Claims (4)
1. high-entropy alloy powder fills the stainless process of spot welding, it is characterized in that, carries out according to the following steps:
(1) high-entropy alloy powder medium organic solvent is mixed; The key component of described high-entropy alloy powder is AlFeCuCoNiTiCr
x, x is the mol ratio of Cr and Al, and the scope of x is 0-0.3, and size of powder particles is 100-300 order;
(2) evenly spray or high-entropy alloy powder medium described in even application at the solder side of workpiece to be welded, form the uniform powder medium packed layer of thickness;
(3) after the organic solvent volatilization of powder medium packed layer, clamping workpiece to be welded, between upper/lower electrode, makes the workpiece solder side close contact to be welded of attaching powder medium;
(4) adjustment protection gas jets aims at workpiece weld zone to be welded, applies protective gas effect;
(5) apply electrode pressure to impact, compress solder side, make matrix surface oxide-film broken by electrode pressure percussion, and in subsequent technique process, keep the effect of pressure;
(6) logical welding current, makes the high-entropy alloy powder melting media of packed layer in stainless steel, reacts under pressure, and produces diffusion at weld interface;
(7) stop welding current effect, holding electrode pressure cools naturally to weldment;
(8) stop electrode pressure effect, stop protective gas effect, upper/lower electrode is removed, and completes welding.
2. high-entropy alloy powder according to claim 1 fills the stainless process of spot welding, and it is characterized in that, described workpiece to be welded is stainless steel materials or wire rod, and welding point form is lap joint.
3. high-entropy alloy powder according to claim 1 fills the stainless process of spot welding, and it is characterized in that, the end face of described upper/lower electrode is spheric or truncated cone.
4. high-entropy alloy powder according to claim 1 fills the stainless process of spot welding, and it is characterized in that, described organic solvent comprises acetone and ethanol.
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| CN201310142899.6A CN103252568B (en) | 2013-04-23 | 2013-04-23 | A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding |
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| CN201310142899.6A CN103252568B (en) | 2013-04-23 | 2013-04-23 | A kind of for filling spot welding stainless steel high-entropy alloy powder and the stainless process of a kind of high-entropy alloy powder filling spot welding |
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| US10240222B2 (en) | 2014-07-08 | 2019-03-26 | GM Global Technology Operations LLC | Current schedule for optimized reaction metallurgical joining |
| CN105671545B (en) * | 2016-01-26 | 2018-05-25 | 山东科技大学 | A kind of single-phase high-entropy alloy coating of high rigidity and its preparation method and application |
| US10232462B2 (en) * | 2016-03-01 | 2019-03-19 | GM Global Technology Operations LLC | Spot welding |
| CN105950947B (en) * | 2016-07-06 | 2018-08-14 | 浙江亚通焊材有限公司 | Rich iron high-entropy alloy powder body material and preparation method thereof for 3D printing |
| US11339817B2 (en) | 2016-08-04 | 2022-05-24 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11318566B2 (en) | 2016-08-04 | 2022-05-03 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US10640854B2 (en) * | 2016-08-04 | 2020-05-05 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN109967812B (en) * | 2019-04-04 | 2021-02-02 | 贵州理工学院 | Brazing connection method of CoCrCuFeNi high-entropy alloy |
| CN109967850B (en) * | 2019-04-23 | 2021-02-05 | 贵州理工学院 | Connection method for 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 |
| CN112171036B (en) * | 2020-09-11 | 2022-07-26 | 北京汽车研究总院有限公司 | Welding method |
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