CN102672331B - Method for preparing TA2/Q235 composite plate by electric resistance welding and welding material - Google Patents
Method for preparing TA2/Q235 composite plate by electric resistance welding and welding material Download PDFInfo
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- CN102672331B CN102672331B CN201210143237.6A CN201210143237A CN102672331B CN 102672331 B CN102672331 B CN 102672331B CN 201210143237 A CN201210143237 A CN 201210143237A CN 102672331 B CN102672331 B CN 102672331B
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Abstract
The invention discloses a method for preparing a TA2/Q235 composite plate by electric resistance welding. A folded middle-layer alloy foil is arranged between a TA2 plate to be welded and a Q235 plate to be welded, and the welding operation is carried out by adopting a resistance spot-welding mode, so that the welding of the TA2/Q235 plates is realized. The invention also discloses a middle-layer alloy and a preparation method thereof. The middle-layer alloy comprises the following components in the terms of the atomic percent: 5-10% of Ti, 5-10% of Fe, 20-25% of Al, 30-35% of Ni and 30-35% of Cu, wherein the total percent is 100%. The method is convenient and easy, and is wide in applicability; the welding material has excellent strength, toughness and corrosion performance; brittle intermetallic compound phases are not easily formed, a high-performance titanium-steel composite structure is easily obtained; and the welding material is simple in process and low in manufacturing cost.
Description
Technical field
The invention belongs to welding technology field, relate to a kind of method that electric resistance welding prepares TA2/Q235 composite plate, the invention still further relates to welding material that the method uses and preparation method thereof.
Background technology
Titanium and titanium alloys specific strength is high, and corrosion resisting property is good, is important aerospace structural material.But because titanium price is higher, limit its further development and application.Steel cheap, has good thermoelectricity capability and mechanical property.In some cases, need the dissimilar material joining part having titanium alloy and stainless good characteristic concurrently, as the parts etc. in some part in nuclear fuel equipment for after-treatment in nuclear power unit, satellite propellant spray device and attitude pushing and controlling system, recently be used as the bridge post of offshore structure as bridge spanning the sea and the anticorrosion liner plate of ultra-large type floating marine structure in trial again, liner plate is nearly all use titanium cladding steel.Titanium-steel composites structure price is equivalent to 25 ~ 35% of titanium material.Titanium-steel composites structure had both given full play to the advantage of basic unit and coating material separately, also be save the best approach of noble metal, in raising stock utilization, alleviate construction weight, to reduce costs etc. in there are obvious social effect and economic benefits, have broad application prospects.
But the application of titanium-steel composites structure certainly will relate to the Welding Problems of titanium and steel.Because the process based prediction model such as the linear expansion coefficient between titanium and steel, thermal conductivity exist larger difference, very easily form crackle in welding process, weld seam forms a large amount of firmly crisp intermetallic compound (TiFe, TiFe
2) and titanium and carbon generate frangible compounds TiC, strength of welded joint is lower.Titanium and steel to weld difficulty larger.A titanium/steel welding difficult problem fails effectively to be solved for many years always, constrains titanium-steel composites structure in the popularization of engineering field and extensive use.
At present, the main method studying the welding of titanium/steel is melting, Pressure Welding (comprising diffusion welding (DW) and explosive welding (EW)) and soldering.This several method all can by welded together for titanium/steel, but said method or be difficult to control or make it not be widely used in industrial production because brittle intermetallic thing causes joint performance not good because of welding procedure.
Summary of the invention
A kind of electric resistance welding is the object of the present invention is to provide to prepare the method for TA2/Q235 composite plate, the problem solving prior art or be difficult to control because of welding procedure or cause joint performance not good because of brittle intermetallic thing.
Second object of the present invention is the welding material providing a kind of said method to use.
3rd object of the present invention is the preparation method providing a kind of above-mentioned welding material.
The technical solution adopted in the present invention is, a kind of electric resistance welding prepares the method for TA2/Q235 composite plate, between TA2 sheet material to be welded and Q235 sheet material to be welded, place the intermediate layer alloy foil being folded into multilayer, adopt resistance spot welding mode to carry out welding operation, realize the welding of TA2/Q235 sheet material; Described intermediate layer alloy, is made up of by atomic percent following component: Ti 5 ~ 10%, Fe 5 ~ 10%, Al 20 ~ 25%, Ni 30 ~ 35%, Cu 30 ~ 35%, adds up to 100%.
Second technical scheme of the present invention is, the welding material that a kind of above-mentioned method is used, is made up of by atomic percent following component: Ti 5 ~ 10%, Fe 5 ~ 10%, Al 20 ~ 25%, Ni30 ~ 35%, Cu 30 ~ 35%, adds up to 100%.
3rd technical scheme of the present invention is, a kind of preparation method of above-mentioned welding material implements according to following steps:
Step 1, utilize that vacuum arc furnace ignition is molten joins foundry alloy
Weigh following various high pure metal by atomic percent, Ti 5 ~ 10%, Fe 5 ~ 10%, Al20 ~ 25%, Ni 30 ~ 35%, Cu 30 ~ 35%, add up to 100%; By the mixing of load weighted component, to be compacted into base stand-by; The blank made is carried out in vacuum arc furnace ignition molten joining, obtained foundry alloy;
Step 2, apply single roller quick solidification apparatus, by running roller wire velocity control at 5-8m/s, the foundry alloy that upper step obtains is prepared into intermediate layer alloy foil, preparation-obtained intermediate layer alloy foil thickness is 100 ~ 200 μm, wide 3 ~ 7mm, long 0.5 ~ 1.0m.
The invention has the beneficial effects as follows, this middle floor height entropy electric resistance welding method, welding process is convenient and easy, welding object wide adaptability; Intermediate layer of the present invention welding material has excellent intensity, toughness and corrosion resisting property, not easily forms brittle intermetallic thing phase, is easy to obtain high performance titanium-steel composites structure, is easy to machine-shaping, is convenient to assemble welding; Preparation method's step of this intermediate layer welding material is simple, and easily operate, cost of manufacture is low, is convenient to promote.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
The method that electric resistance welding of the present invention prepares TA2/Q235 composite plate is: between two blocks of sheet materials to be welded (TA2 sheet material to be welded and Q235 sheet material to be welded), place the intermediate layer alloy foil be folded over, (namely certain thickness through intermediate layer alloy that strict composition sets), resistance spot welding mode is adopted to carry out welding operation, make interface resistance heat fusing intermediate layer alloy and local mother metal, deposite metal phase mixing, its motlten metal is in intermediate layer alloy component range, solidify rear formation and there is single phase solid solution body structure, and without the high entropy welded seam (nugget) that intermetallic compound produces, realize the high-performance welding of TA2/Q235 sheet material.
The intermediate layer alloy (welding material) used in the inventive method, is made up of by atomic percent following component: Ti 5 ~ 10%, Fe 5 ~ 10%, Al 20 ~ 25%, Ni 30 ~ 35%, Cu 30 ~ 35%, adds up to 100%.This intermediate layer alloy is originally as high moisture in the soil alloy, and its fusing point is higher than mother metal, different from traditional resistor solder principle.The weld metal that postwelding is formed also is high moisture in the soil alloy, and Ti, Fe content just in weld seam is significantly higher than intermediate layer alloy.
In the alloying component of intermediate layer of the present invention, limiting reason to the composition of each chemical element and content is:
In order to improve the comprehensive mechanical property of TA2/Q235 joint, intermediate layer alloy Principal variables selection Ti-FeCu-Ni-Al five pivot system alloy.Main cause has 3 points: 1. mother metal fusing dissolving in the liquid state molten pool formed to intermediate layer fusing is inevitable in welding process, and for prevention weld seam produces for the purpose of brittle intermetallic thing, intermediate layer must containing pivots such as Ti, Fe; 2. in order to obtain the high-performance weld seam with single-phase fcc solid solution micro-structural, Cu, Ni must be added in the alloy of intermediate layer as major components; 3. by adding Al element in the alloy, forming intermediate layer alloy, improving the fusion character of weld seam and titanium mother metal.
The preparation method of the intermediate layer alloy used in welding method of the present invention, implements according to following steps:
Step 1, utilize that ultrahigh vacuum electric arc furnaces is molten joins foundry alloy:
Weigh following various high pure metal by atomic percent, Ti 5 ~ 10%, Fe 5 ~ 10%, Al20 ~ 25%, Ni 30 ~ 35%, Cu 30 ~ 35%, add up to 100%, above-mentioned atomic percent is converted into mass percent, weigh good various high pure metal by mass percentage; The purity of all various high pure metals is all higher than 99.99%, and by the mixing of load weighted component, to be compacted into base stand-by; The blank made is carried out in vacuum arc furnace ignition molten joining, obtained foundry alloy;
Step 2, apply single roller quick solidification apparatus, by running roller wire velocity control at 5-8m/s, the foundry alloy that upper step obtains is prepared into intermediate layer alloy foil, preparation-obtained intermediate layer alloy foil thickness is 100 ~ 200 μm, wide 3 ~ 7mm, long 0.5 ~ 1.0m.
Use the sample joint of intermediate layer alloy foil welding TA2 and the Q235 of above-mentioned preparation, first the foil folded is placed between TA2 plate to be welded and Q235 plate during assembling, (foil builds up cladding, the concrete number of plies is depending on foil thickness), then conveniently resistance spot welding method welds the joint assembled.Use intermediate layer of the present invention alloy foil to carry out TA2 plate and resistance spot welding implemented by Q235 sheet material, similar to existing spot-welding technology operating condition, technique is simple, easy to operate.Each constituent content in intermediate layer alloy embodiment 1 ~ 3 is listed in table 1.Each pivot content of the weld metal using embodiment 1 ~ 3 postwelding to obtain is listed in table 2.
Each constituent content table in table 1 intermediate layer alloy embodiment 1 ~ 3
Each pivot of the weld metal that table 2 uses embodiment 1 ~ 3 postwelding to obtain is containing scale
Embodiment 1
According to each component element content of the data decimation in table 1, and to prepare thickness according to above-mentioned steps be 150 μm, intermediate layer, the Ti5Fe5Al30Ni30Cu30 intermediate layer alloy foil of wide 5mm, long 0.5m.
The intermediate layer alloy foil that application is folded over, as intermediate layer, carries out resistance spot welding to TA2 and Q235, and the tensile-sbear strength obtaining welding point is about 281MPa.
Embodiment 2
The each component element of data decimation according to embodiment in table 12 and content, control roll surface speed at 5m/s, prepares thick about 130 μm, wide about 5mm, is about the Ti10Fe10Al20Ni30Cu30 intermediate layer alloy foil of 0.8m.The intermediate layer alloy foil that application is folded over, as intermediate layer, carries out resistance spot welding to TA2 and Q235, and the tensile-sbear strength obtaining welding point is about 298MPa.
Embodiment 3: according to the step of above-described embodiment 1, the each component element of data decimation according to embodiment in table 12 and content, control roll surface speed at 5m/s, prepares thick about 130 μm, wide about 5mm, is about the Ti8Fe7Al20Ni35Cu30 intermediate layer alloy foil of 0.8m.The intermediate layer alloy foil that application is folded over, as intermediate layer, carries out resistance spot welding to TA2 and Q235, and the tensile-sbear strength obtaining welding point is about 296MPa.
In sum, intermediate layer of the present invention alloy, flexility is good, is convenient to processing and assembling; When welding and the matching of titanium and steel alloy is good, weld seam (nugget) is single-phase fcc solid solution tissue, joint comprehensive mechanical performance significantly improves; The preparation method of this kind of intermediate layer alloy foil, technique is simple, and cost of manufacture is low, is convenient to promote.
Claims (1)
1. an electric resistance welding prepares the method for TA2/Q235 composite plate, it is characterized in that: between TA2 sheet material to be welded and Q235 sheet material to be welded, place the intermediate layer alloy foil being folded into multilayer, adopt resistance spot welding mode to carry out welding operation, realize the welding of TA2/Q235 sheet material;
Described intermediate layer alloy, is made up of by atomic percent following component: Ti5 ~ 10%, Fe5 ~ 10%, Al20 ~ 25%, Ni30 ~ 35%, Cu30 ~ 35%, adds up to 100%; The foil thickness of described intermediate layer alloy is 100 ~ 200 μm, wide 3 ~ 7mm, long 0.5 ~ 1.0m,
The preparation method of described intermediate layer alloy, implements according to following steps:
Step 1, utilize that vacuum arc furnace ignition is molten joins foundry alloy
Weigh following various high pure metal by atomic percent, Ti5 ~ 10%, Fe5 ~ 10%, Al20 ~ 25%, Ni30 ~ 35%, Cu30 ~ 35%, add up to 100%, the purity of various high pure metal is all higher than 99.99%; By the mixing of load weighted component, to be compacted into base stand-by; The blank made is carried out in vacuum arc furnace ignition molten joining, obtained foundry alloy;
Step 2, apply single roller quick solidification apparatus, by running roller wire velocity control at 5-8m/s, the foundry alloy that upper step obtains is prepared into intermediate layer alloy foil, preparation-obtained intermediate layer alloy foil thickness is 100 ~ 200 μm, wide 3 ~ 7mm, long 0.5 ~ 1.0m.
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| CN103567654B (en) * | 2013-10-12 | 2015-09-30 | 西安理工大学 | For welding material and the welding method of titanium-steel composite board |
| CN104607784A (en) * | 2013-11-04 | 2015-05-13 | 上海工程技术大学 | Method for connecting titanium alloy and aluminum alloy dissimilar materials by resistance spot welding process |
| CN104084657B (en) * | 2014-07-03 | 2016-08-24 | 洛阳双瑞精铸钛业有限公司 | The processing of a kind of titanium steel composite keel and installation method |
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| CN101590574A (en) * | 2009-06-29 | 2009-12-02 | 西安理工大学 | Be used to weld TA2 and 0Cr18Ni9Ti high-entropy alloy solder and preparation method thereof |
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| JP2001096374A (en) * | 1999-09-28 | 2001-04-10 | Kyushu Fukugo Zairyo Kenkyusho:Kk | Method of joining steel plate and different metal thin sheet |
| CN1353204B (en) * | 2000-11-09 | 2012-05-23 | 国立清华大学 | High-irregularity multi-element alloy |
| CN101418394A (en) * | 2007-10-23 | 2009-04-29 | 财团法人工业技术研究院 | Superhard composite material and method for preparation thereof |
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| US3038988A (en) * | 1961-04-26 | 1962-06-12 | Titanium Metals Corp | Welding process |
| CN101590574A (en) * | 2009-06-29 | 2009-12-02 | 西安理工大学 | Be used to weld TA2 and 0Cr18Ni9Ti high-entropy alloy solder and preparation method thereof |
| CN101618478A (en) * | 2009-07-27 | 2010-01-06 | 哈尔滨工业大学（威海） | Auxiliary spot welding solid phase connecting method of dissimilar metal copper interlayer |
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