CN106695173B - A kind of welding material and preparation method thereof welding the nearly titanium layer of titanium-steel composite board - Google Patents
A kind of welding material and preparation method thereof welding the nearly titanium layer of titanium-steel composite board Download PDFInfo
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- CN106695173B CN106695173B CN201710159558.8A CN201710159558A CN106695173B CN 106695173 B CN106695173 B CN 106695173B CN 201710159558 A CN201710159558 A CN 201710159558A CN 106695173 B CN106695173 B CN 106695173B
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention discloses the welding materials and its manufacturing method of a kind of nearly titanium layer of welding titanium-steel composite board, and the ingredient of the welding material is according to mass percent are as follows: C≤0.02%, Si≤0.02%, Mn3.2-3.38%, P≤0.02%, S≤0.01%, Cr 13-15%, Cu 0.012-0.014%, Fe≤0.7%, Ti 0.3-0.52, Co 0.032-0.038%, Nb+Ta 1.9-3%, surplus Ni.The transition zone from titanium layer to steel layer is welded using the weldering welding material, avoids the generation of intermetallic compound, can effectively realize that titanium-steel pipe titanium layer and nearly titanium layer carry out melting welding transition；Small gage of wire of the present invention is 1.2mm, Tig Welding and metal argon arc welding can not only be welded by hand, but also the manufacturing process of welding wire of the present invention is simple, cost is relatively low, is convenient for large-scale serial production.
Description
Technical field:
The invention belongs to Metal Material Welding technical fields, and in particular to a kind of weldering for welding the nearly titanium layer of titanium-steel composite board
Connect material and preparation method thereof.
Background technique:
Titanium-bimetal copper-steel composite material has realized the more greatly different different metal of intensity, fusing point, thermal expansion coefficient difference
U.S. metallurgical bonding, has given full play to the characteristic of different materials, has not only solved the corrosion resistance demand of oil and gas pipeline, but also solve
The high-strength tenacity requirement of oil and gas pipeline.
Currently, the docking of titanium-steel composite board is all made of first welding steel, then titanium plate is individually welded using plate form is covered
It connects, so as to avoid the congruent melting pond welding of two kinds of materials, but the joint structure of such welding method is complicated, and intensity is insufficient, in pipe
It is difficult to be engineered application on road.However, since the crystal chemistry of titanium and iron, thermophysical property differ greatly, if in same molten bath
Directly welding easily forms intermetallic compound, so that weld seam is cracked, the plasticity of welding point and degraded toughness, and seriously
Hinder titanium-steel composite board large-scale application.In this regard, we have researched and proposed using different welding materials and by certain suitable
The welding method of sequence welding titanium-steel composite board, wherein titanium layer and the welding material of steel layer comparative maturity, still, from titanium to
Nearly titanium layer wlding is also immature in the transition zone welding material of steel.
On June 22nd, 2016 bulletin Authorization Notice No. be 103567660B Chinese invention patent, this is entitled to be used for
Titanium-pipeline steel composite board transition zone welding method is welded, nearly titanium layer welding material is composed of the following components: Ni52-58%, C
≤ 0.04%, N≤0.007%, O≤0.035%, H≤0.001%, surplus Ti；Nearly steel layer welding material is by following components group
At: Mn3.15-3.35%, Cr18-27%, Cu0.01-0.015%, Ti0.35-0.55%, Co0.03-0.04%, Nb1.8-
2.0%, Ta0.2-0.6%, C≤0.02%, Si≤0.025%, P≤0.002%, S≤0.002%, Fe≤0.75%, surplus
For Ni.Cr content is higher in the patent, it will reduces the intensity and hardness of welding point, it is too low that S, P belong to content, is unfavorable for giving birth to
Control is produced, makes that increased production cost.
Application No. is 201610224395.2 Chinese invention patent filed on April 12nd, 2016, which is
A kind of TIG/MIG welding wire preparation method of the dedicated high-purity alusil alloy SAL4043 of high-speed rail train, this method include by Si, Fe,
Mg, Cu, Sc and Al carry out melting using vaccum sensitive stove by certain proportional quantity；After each material melting, crystal grain refinement is added
Agent stirring, wait change it is clear after, be added refining agent refinery by de-gassing, after standing, skim, come out of the stove；Remove the sundries at ingot casting surface and both ends
Afterwards, the continuously extruded obtained alloy wire rod of roller is carried out；By alloy wire rod after rough, middle drawing, annealing, finish draw silk, then into
For row scraping cleaning treatment up to the welding wire, the specific process parameter in the manufacturing method is not suitable for welding material of the present invention
Preparation.
Summary of the invention:
The purpose of the present invention is to provide a kind of welding material and preparation method thereof of the nearly titanium layer of welding titanium-steel composite board,
Weld transition zone from titanium layer to steel layer using the welding material, avoid the generation of intermetallic compound, the combination of weld seam compared with
It is good.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of nearly titanium layer of welding titanium-steel composite board
Welding material, the ingredient of the welding material is according to mass percent are as follows: C≤0.02%, Si≤0.02%, Mn3.2-
3.38%, P≤0.02%, S≤0.01%, Cr 13-15%, Cu 0.012-0.014%, Fe≤0.7%, Ti 0.3-0.52,
Co 0.032-0.038%, Nb+Ta 1.9-3%, surplus Ni.
Above-mentioned welding material is the wire bond that diameter is 1.2mm.
Below the effect to contained basic element in the welding material of the nearly titanium layer of welding titanium-steel composite board of the invention and its
Explanation is made a concrete analysis of in the selection of dosage:
Carbon (C): C content is excessively high in welding material ingredient can form hard and crisp TiC with titanium, be easy to produce crackle, therefore,
C content is preferably≤0.02%.
Iron (Fe): Fe can reduce transformation temperature, stablizes β phase, significantly increases the intensity of weld seam, control suitable Fe element and contain
Amount will not form Ti Fe phase in seam organization, therefore Fe content is preferably≤0.7%.
Cobalt (Co): the addition of Co element helps to inhibit and reduce diffusion of Cu, Ni element to base material, improves connector
Can, therefore Co content is preferably 0.032-0.038%.
Chromium (Cr): Cr too high levels can reduce the intensity and hardness of material, when Cr content is more than 15%, it will formed with iron
Intermetallic compound (σ phase), so that enormousness change is generated in solid solution causes big stress, thus it is extremely brittle；The easy shape of C and Cr
At free ferrite (δ), it can be such that the heat resistance of material reduces, and the reasonable Cr content that controls can be such that δ phase reduces, therefore Cr contains
Amount is preferably 13-15%.
Silicon (Si), manganese (Mn): Si, Mn are strong deoxidiers, therefore content is higher, the oxygen in molten bath and Si, Mn formationization
Object is closed, CO is avoided to generate, weld porosity is small, and Mn and S forms MnS, eliminates the illeffects of S, therefore Si content is preferred
3.2-3.38% is preferably for≤0.025%, Mn content.
Nb+Ta:Nb+Ta element can play the role of solution strengthening, and content selects 1.9-3%；
Phosphorus (P), sulphur (S): raw in the variation of tissue and field trash surface when S changes in 0.007%~0.04% range
At MnS layer it is related, the hardness and strength of weld metal reduce, impact flexibility severe exacerbation.P is in 0.007%~0.04% model
When enclosing interior variation, seam organization is had no significant effect.When the content of S in weld metal and P be lower than 0.005% when, then reduce S and
The content of P is produced effects less.S and P belongs to restricted impurity element, but unlimited the content for reducing S and P, will necessarily cause to give birth to
The content for producing the raising of cost, therefore controlling S, P is S≤0.01%, P≤0.02%.
The manufacturing method of the welding material of the nearly titanium layer of above-mentioned welding titanium-steel composite board, comprising the following steps:
Step 1: weighing each element according to the mass percent of the welding material ingredient respectively, by weighed Ni,
Cr, Nb, Ta, Fe element, which are put into vacuum induction melting furnace, successively to be melted, is refined, and molten steel, the temperature of the refining are formed
It is 1400-1600 DEG C, time 25min；
Step 2: to argon gas is poured in vacuum induction melting furnace after refining, the content for being filled with argon gas is 300-350mmHg,
Remaining metallic element is added in molten steel after the completion of pouring and be stirred by argon gas, finally casts, forms ingot casting, molten steel when casting
Temperature be 1500 DEG C；
Step 3: successively forging ingot casting, rolled and drawing, and the nearly titanium layer of the welding titanium-steel composite board is formed
Welding material.
In above-mentioned steps three ingot casting successively forged, rolled and drawing specifically comprises the processes of: first using double-arm
Ingot casting, is forged into the square billet of 50mm × 50mm by electric air hammer at 1100-1150 DEG C；Secondly horizontal using 200 type, five frame
Square billet is rolled into Φ 6.5mm wire rod at 1000-1200 DEG C by column three-high mill；Finally to Φ 6.5- Φ 7.0mm wire rod
Successively carrying out mechanical descaling-pickling-drying ,-dry method is hot candied-to batch-is heat-treated that-dry wire drawing-, which is batched ,-to be polished-batching-to wind
Deng drawing step by step, the welding material for welding the nearly titanium layer of titanium-steel composite board is formed.
Beneficial effects of the present invention:
It is welded using the V-butt of welding material of the invention to titanium-steel composite board, is first welded with titanium welding material
Titanium layer, then weld nearly titanium layer transition with welding material of the invention, can effectively realize titanium-steel pipe titanium layer and nearly titanium layer into
Row melting welding transition；Welding material diameter of the present invention is small, not only can Tig Welding and metal argon arc welding weldering by hand
It connects, and the manufacturing process of welding material of the present invention is simple, cost is relatively low, is convenient for large-scale serial production.
Detailed description of the invention:
Specific embodiments of the present invention will be described in further detail With reference to embodiment.
Fig. 1 is the deposited metal metallographic microscope of the embodiment of the present invention 1.
Fig. 2 is the deposited metal SEM figure of the embodiment of the present invention 1.
Fig. 3 is the deposited metal metallographic microscope of the embodiment of the present invention 2.
Fig. 4 is the deposited metal SEM figure of the embodiment of the present invention 2.
Specific embodiment:
Embodiment 1:
Purified treatment is carried out to various high pure metals first, according to the weight percent of each element: C 0.02%, Si
0.18%, Mn 3.25%, P 0.005%, S 0.005%, Cr 13%, Cu 0.013%, Fe 0.5%, Ti 0.51%, Co
0.035%, Nb+Ta 2.4%, surplus Ni weigh each metallic element respectively, by weighed Ni, Cr, Fe, Nb, Ta material
Expect to be melted in the MgO crucible being put into vacuum induction melting furnace, after metal in furnace all melts and weld pool surface is tranquil
Bubble-free is transferred to refining when escaping, refining temperature is 1400-1600 DEG C, refining time 25min；After refining, to molten steel temperature
1500 DEG C are down to, being filled with argon gas makes to reach 300-350mmHg in furnace, then by the metal material of preparatory load weighted Mn, Cu, Ti, Co
Molten steel is added in material, casts after stirring 2min, and tapping temperature is 1500 DEG C when casting；Casting is heated with lesser power, is poured
Note process molten steel surface is tranquil, and uniformly, after being poured, ingot mould saves half an hour in vacuum chamber, and taking-up ingot casting is simultaneously cold for casting
But to room temperature.The content of C, Si, P, S are controlled in smelting process are as follows: C≤0.02%, Si≤0.02%, P≤0.02%, S≤
0.01%.
Ingot casting is first forged into 50mm × 50mm's at 1100-1150 DEG C using double-arm electric air hammer (750Kg)
Square billet, then blank is rolled by Φ 6.5mm wire rod using 200 type, five frame row three-high mill at 1000-1200 DEG C；It will
Wire rod passes through mechanical descaling-pickling-drying, and-dry method is hot candied-to batch-is heat-treated that-dry wire drawing-, which is batched ,-to be polished-batching-to wind
Deng drawing step by step, the welding wire of Φ 1.2mm is ultimately formed.
Cut the titanium-steel composite board that specification is 160 × 180 × 16mm, 60 ° of grooves of unilateral double open V-arrangement, using TC4 titanium
Silk and welding wire of the invention respectively weld titanium layer and nearly titanium layer, first weld titanium layer, then weld nearly titanium layer, nearly steel layer, rear welding steel
Layer；Welding method and welding procedure are as shown in table 1.Welding joint mechanical property is as shown in table 2, and Welded Joints carry out SEM examination
It tests and is tested with metallographic, the metallographic structure of Weld pipe mill is as shown in Figure 1, SEM figure is as shown in Figure 2.
1 welding method of table and welding condition
| Titanium layer | Transition zone | Steel layer | |
| Welding method | Hand tungsten argon arc welding | Metal argon arc welding | CO2 gas shielded arc welding |
| Welding current | 85~110A | 90~125A | 150~175A |
| Weldingvoltage | 14~15V | 12~14V | 14~18V |
2 welding joint mechanical property of table
As shown in Figure 1, the TC4 welding wire of titanium layer and the welding wire tissue of nearly titanium layer of the invention are well combined, and weld seam is in not more
The pentagon equiaxed structure of rule, crystal boundary side length is smaller to cut more uniformly, and crystal boundary side length is at 50 μm or so；Nearly titanium layer is close
The side TC4 tissue is lesser equi-axed crystal, and grain size organizes grain size essentially identical with TC4；The nearly titanium layer interface of titanium layer-
Combined area transition is gentle, intermediate zone or parting line does not occur, it is seen that two layers of weld seam realizes preferable metallurgical bonding.
As seen from Figure 1, extension and extension, nearly titanium layer and nearly steel layer Ni- has occurred in the nearly titanium layer of sample and nearly steel layer tissue
Crisscross intertexture is organized after the crystallization of Cr alloy, it is evident that nearly titanium layer tissue becomes slice from the equiaxed structure close to TC4 layers
With small block-like ferritic structure, nickel base alloy layer Ni-Cr is in the dendroid crystal grain close to nearly titanium layer side tissue in diverging.
Nearly titanium layer is well combined with Ni-Cr layers it can be seen from Fig. 2 scanning electron microscope, not cracked, be mingled with etc. and to lack
It falls into.
Embodiment 2:
Purified treatment is carried out to various high pure metals first, is weighed respectively according to weight percent, then according to each element
Weight percent: C 0.02%, Si 0.15%, Mn 3.3%, P 0.001%, S 0.002%, Cr 14%, Cu
0.012%, Fe 0.6%, Ti 0.38%, Co 0.037%, Nb+Ta 2.2%, surplus Ni weigh each metal member respectively
Element；Then the welding wire that manufacture diameter is 1.2mm according to the method for embodiment 1.
Cut the titanium-steel composite board that specification is 160 × 180 × 16mm, 60 ° of grooves of unilateral double open V-arrangement, using TC4 titanium
Silk and welding wire of the invention respectively weld titanium layer and nearly titanium layer, first weld titanium layer, then weld nearly titanium layer, nearly steel layer, rear welding steel
Layer；Welding method and welding procedure are as shown in table 3.Welding joint mechanical property is as shown in table 4, and it is real that Welded Joints carry out metallographic
It tests, the metallographic structure of Weld pipe mill is as shown in figure 3, SEM figure is as shown in Figure 4.
3 welding method of table and welding condition
4 welding joint mechanical property of table
As shown in Figure 3: the TC4 welding wire of titanium layer and the welding material interface cohesion of nearly titanium layer of the invention are preferable, two layers of tissue
It is irregular equiax crystal, caused by the thermal process that this is also due to two layers is identical, ingredient is approximate；It is formd after nearly titanium layer crystallization
Mostly pentagonal equiaxed structure.
As seen from Figure 3: the nearly titanium layer of sample appearance in conjunction with nearly steel layer tissue is more similar, nearly titanium layer and nearly steel layer
Organized after Ni-Cr alloy crystallization it is crisscross staggeredly, nearly titanium layer tissue has become the branch of fine strip shape from the equiaxed structure close to titanium layer
Crystalline substance, is dispersed with the wide about different leaf shape crystal grain of length, width around dendrite, and branch it is more deep extended to nickel-base alloy
Layer forms a wider intermediate zone with nickel base alloy layer.
Nearly titanium layer is well combined with Ni-Cr layers it can be seen from Fig. 4 scanning electron microscope, not cracked, be mingled with etc. and to lack
It falls into.
Claims (1)
1. a kind of manufacturing method for the welding material for welding the nearly titanium layer of titanium-steel composite board, it is characterised in that: the welding material
Ingredient is according to mass percent are as follows: C:0.02%, Si:0.18%, Mn:3.25%, P:0.005%, S:0.005%, Cr:
13%, Cu:0.013%, Fe:0.5%, Ti:0.51%, Co:0.035%, Nb+Ta:2.4%, surplus Ni；The welding material
Material is the wire bond that diameter is 1.2mm；
The manufacturing method the following steps are included:
Step 1: weighing each element according to the mass percent of the welding material ingredient respectively, by weighed Ni, Cr,
Nb, Ta, Fe element, which are put into vacuum induction melting furnace, successively to be melted, is refined, and molten steel is formed, and the temperature of the refining is
1400-1600 DEG C, time 25min；
Step 2: to argon gas is filled in vacuum induction melting furnace after refining, the content for being filled with argon gas is 300-350mmHg, argon gas
Remaining element is added in molten steel after the completion of pouring and be stirred, is finally cast, ingot casting is formed, the temperature of molten steel is when casting
1500℃；
Step 3: successively forging ingot casting, rolled and drawing, and the welding of the nearly titanium layer of the welding titanium-steel composite board is formed
Material；
Ingot casting is successively forged in the step 3, is rolled and drawing specifically comprises the processes of: first using double-arm electronic
Ingot casting is forged into the square billet of 50mm × 50mm by pneumatic hammer at 1100-1150 DEG C；Secondly 200 type, five frame row three is used
Square billet is rolled into Φ 6.5mm wire rod at 1000-1200 DEG C by roller mill；Successively to Φ 6.5- Φ 7.0mm wire rod finally
Carry out mechanical descaling-pickling-drying-dry method is hot candied-batch-be heat-treated-dry wire drawing-is batched-polish-batching-wind etc. by
Grade drawing, forms the welding material for welding the nearly titanium layer of titanium-steel composite board；
Titanium-steel composite board, 60 ° of grooves of unilateral double open V-arrangement, titanium layer, transition zone are welded using TC4 titanium silk and the welding material
Hand tungsten argon arc welding, metal argon arc welding and CO are successively used with steel layer2Gas shielded arc welding, hand tungsten argon arc welding, fusing
Electrode argon arc welding and CO2The weldingvoltage of gas shielded arc welding is followed successively by 14-15V, 12-14V and 14-18V, and welding current is followed successively by
85-110A, 90-125A and 150-175A；The mechanical property of welding point: tensile strength 498MPa, yield strength 395MPa break
Elongation percentage 12.5% afterwards, expansion and contraction 35.5% of having no progeny, the impact flexibility 35J under room temperature；Nearly titanium layer has occurred with nearly steel layer tissue
Extend and extension, nearly titanium layer organize crisscross intertexture after crystallizing with nearly steel layer Ni-Cr alloy, nearly titanium layer tissue is by close to TC4 layers
Equiaxed structure become slice and small block-like ferritic structure, nickel base alloy layer Ni-Cr is being in close to nearly titanium layer side tissue
The dendroid crystal grain of diverging.
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| CN107984054B (en) * | 2017-11-30 | 2020-10-16 | 钢铁研究总院 | Welding material for fusion welding butt joint transition layer of titanium steel composite plate and welding method thereof |
| CN109202386B (en) * | 2018-11-08 | 2020-06-23 | 宝鸡市泛美材料科技有限公司 | Method for improving weld joint structure of titanium and titanium alloy plate |
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| JP5389000B2 (en) * | 2010-12-02 | 2014-01-15 | 株式会社神戸製鋼所 | Ni-base alloy weld metal, Ni-base alloy-coated arc welding rod |
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| JP2010172952A (en) * | 2009-02-02 | 2010-08-12 | Toshiba Corp | WELDING MATERIAL COMPOSED OF HIGH-Cr CONTAINING Ni-BASED ALLOY, AND WELDING METHOD USING THE SAME |
| CN102463422A (en) * | 2010-11-12 | 2012-05-23 | 株式会社神户制钢所 | Ni base alloy solid wire for welding |
| CN102554505A (en) * | 2012-01-11 | 2012-07-11 | 中国科学院金属研究所 | Nickel-based bare wire resisting point defects and crack defects |
| CN103567660A (en) * | 2013-10-30 | 2014-02-12 | 西安理工大学 | Welding material and welding method for welding transition layer of Ti-pipeline steel composite board |
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