CN104759782A - Alloy system electrode with low-tempering brittleness - Google Patents
Alloy system electrode with low-tempering brittleness Download PDFInfo
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- CN104759782A CN104759782A CN201510197301.2A CN201510197301A CN104759782A CN 104759782 A CN104759782 A CN 104759782A CN 201510197301 A CN201510197301 A CN 201510197301A CN 104759782 A CN104759782 A CN 104759782A
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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
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/406—Filled tubular wire or rods
Abstract
Provided is an alloy system electrode with low-tempering brittleness. The electrode is composed of a core wire, a coating and adhesives, wherein the core wire adopts an H08E wire rod with low S, P, the coating comprises marble, fluorite, barium carbonate, zircon sand, rutile, atomized ferrosilicon, electrolytic manganese metal, ferrotitanium, chromium metal, molybdenum, nickel metal, rare earth fluoride, calcium-silicon and sodium carbonate, and the adhesives adopt pure sodium water glass; an oil pressurized electrode extrusion press is used for preparing the 2.25Cr-1Mo alloy electrode. The alloy system electrode with the low-tempering brittleness has the advantage that the tempering brittleness sensibility of deposited metal is smaller, Vtr54 is about -75 DEG C before step cooling, Vtr54 is about -60 DEG C after step cooling, VTr54+3deltaVTr54=-25 DEG C, the most stringent requirements for engineering at the present stage is fully met, all-position welding can be achieved, the manufacturability is good, the electric arc is stable, splashing is less, the sediment separation is easy, and the deposited metal has good low-temperature toughness.
Description
Technical field
The invention belongs to technical field of welding materials, especially a kind of alloy system welding rod with low temper brittleness, this alloy refers in particular to 2.25Cr-1Mo alloy system welding rod.
Background technology
12Cr2Mo1R steel plate is widely used in the manufacture of the field bearing devices such as petrochemical industry, Coal Chemical Industry, nuclear power and thermoelectricity, because its serviceability temperature is higher 500 ~ 600 DEG C, service condition is comparatively harsh, require also higher to the welding rod supporting with it, in engineering, the general deposited metal composition 2.25Cr-1Mo alloy system welding rod close with this steel plate that adopt welds, but the temper brittleness that 12Cr2Mo1R steel and this welding rod occur when long-term higher temperature uses is comparatively serious, brings larger risk to the safe operation of bearing device.
From composition, the principal element of appearance temper brittleness is Mn, Si and impurity P, Sb, Sn, As etc., in engineer applied, conventional J coefficient and Watanbe coefficient and X coefficient and Bruscato coefficient are as the index evaluating steel plate and wlding deposited metal temper brittleness tendency, and this index is represented by following formula:
X coefficient=(10P+5Sb+4Sn+As) × 10
-2ppm
J coefficient=(Mn+Si) (P+Sn) × 10
4%
In above-mentioned formula, require: X coefficient is less than 10ppm, and J coefficient is less than 100%.
The main manifestations of temper brittleness is the decline of notch toughness, the tendency adopting ladder cooling method to characterize temper brittleness in present engineering more, so-called ladder cooling method is exactly be placed in by test material in the large temperature range of temper brittleness sensitiveness stepwise to carry out being incubated and cool, staged generally adopts 5 ladders to make it that temper brittleness occur, and conventional ladder cooling curve as shown in Figure 1.
In practice, usually with the variable quantity △ VTrs of the ductile-brittle transition temperature VTrs of v-notch Charpy test acquisition, or the variable quantity △ VTr54 of 54J Charpy impact energy transition temperature VTr54 evaluates the degree of temper embrittlement.In engineering, the ladder cooling test of General Requirements 12Cr2Mo1R steel plate and supporting wlding should meet formula following formula:
VTr54+α△VTr54≤0℃
In formula, VTr54 represents 54J ballistic work transition temperature after minimum thermal process, and in formula, △ VTr54 represents cold front and back, rank VTr54 increment, and α is coefficient, generally get 1 ~ 3, α value larger to temper brittleness require harsher.
Along with improving constantly of metallurgical level, the degree of purity of steel plate is more and more higher, the temper embrittlement sensitiveness of present stage 12Cr2Mo1R steel plate has dropped to lower level, but deposited metal or the joint of the 2.25Cr-1Mo alloy system welding rod supporting with it still also exist the larger problem of temper embrittlement sensitiveness, can't meet
The needs of bearing device welding.
Summary of the invention
For the problems referred to above, the invention provides a kind of 2.25Cr-1Mo alloy system welding rod with low temper brittleness, this welding rod can all-position welding, manufacturability is good, arc stability, few, the de-slag of splashing are easy, deposited metal has good low-temperature toughness, and temper embrittlement sensitiveness is lower, the examination of harsh step cold test can be met.
For achieving the above object, the present invention adopts following technical scheme:
A kind of 2.25Cr-1Mo alloy system welding rod with low temper brittleness, this 2.25Cr-1Mo alloy system welding rod by core wire, coating and binding agent three part form, wherein core wire adopts the H08E wire rod of low S, P, coating contains calcite and fluorite, brium carbonate, zircon sand, rutile, atomization ferrosilicon, electrolytic manganese metal, ferrotianium, crome metal, metal molybdenum, metallic nickel, rare earth fluoride, calcium-silicon, soda ash, binding agent adopts pure sodium silicate, preparation 2.25Cr-1Mo alloy system welding rod uses hydraulic type electrode extrusion press, and feature of the present invention is as follows:
Require that each chemical composition wt.% of H08E wire rod reaches: C≤0.010, Mn 0.35 ~ 0.60, Si≤0.030, S≤0.005, P≤0.005;
Require the modulus of pure sodium silicate to reach 3.2, Baume degrees controls at 42 ~ 43 °, require that each chemical composition wt.% of pure sodium silicate reaches: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010;
Coating proportioning is by weight: 30 ~ 42 parts of marbles, 17 ~ 23 parts of fluorites, 7 ~ 10 parts of brium carbonates, 3 ~ 6 parts of zircon sands, 3 ~ 5 parts of import rutile, 4 ~ 6 parts of atomization ferrosilicon, 2 ~ 4 parts of electrolytic manganese metals, 2 ~ 4 parts of ferrotianiums, 7 ~ 8 parts of crome metals, 3 ~ 4 parts of metal molybdenum, 0.4 ~ 0.6 part of metallic nickel, 1 ~ 3 part of rare earth fluoride, 1 ~ 2 part of calcium-silicon, 0.5 ~ 1.5 part of soda ash;
In above-mentioned coating is formed:
Marmorean granularity requirements reaches 40 orders, and marmorean each chemical composition wt.% reaches: CaCO
3>=98.0, S≤0.010, P≤0.010;
The granularity requirements of fluorite reaches 60 orders, and each chemical composition wt.% of fluorite reaches: CaF
2>=95.0, SiO
2≤ 1.0, S≤0.010, P≤0.010;
Each chemical composition wt.% of brium carbonate reaches: BaCO
3>=98.0, S≤0.08, P≤0.005;
The granularity requirements of zircon sand reaches 40 orders, and each chemical composition wt.% of zircon sand reaches: SiO
2>=30, ZrO
2>=60, S≤0.004, P≤0.010;
The granularity requirements of rutile reaches 60 orders, and each chemical composition wt.% of rutile reaches: TiO
2>=95.0, S≤0.02, P≤0.02;
The granularity requirements of atomization ferrosilicon reaches 40 orders, and each chemical composition wt.% of atomization ferrosilicon reaches: Si 43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010;
The granularity requirements of electrolytic manganese metal reaches 60 orders, and each chemical composition wt.% of electrolytic manganese metal reaches: C≤0.01, S≤0.03, P≤0.01, Si<0.050, Mn >=99.5;
The granularity requirements of ferrotianium reaches 40 orders, and each chemical composition wt.% of ferrotianium reaches: Ti 25 ~ 35, S≤0.03, P≤0.02, Al≤8.0, Si≤4.5;
The granularity requirements of crome metal reaches 100 orders, and each chemical composition wt.% of crome metal reaches: Cr>=99.0, C≤0.020, S
≤0.010, P≤0.010;
The granularity requirements of metal molybdenum reaches 100 orders, and each chemical composition wt.% of metal molybdenum reaches: Mo >=99.0, C≤0.020, S≤0.010, P≤0.010;
The granularity requirements of metallic nickel reaches 80 orders, and each chemical composition wt.% of metallic nickel reaches: Ni+Co >=99.5, C≤0.05, S≤0.005, P≤0.005;
Each chemical composition wt.% of rare earth fluoride reaches: REO >=80, F >=25;
The granularity requirements of calcium-silicon reaches 40 orders, and each chemical composition wt.% of calcium-silicon reaches: Si >=60, Ca >=28, S≤0.050, P≤0.010;
The granularity requirements of soda ash reaches 60 orders, and each chemical composition wt.% of soda ash reaches: Na
2cO
3>=98.0;
Each for above-mentioned coating component is carried out blending mixing, add pure sodium silicate by 22 ~ 26% of coating gross weight again and stir, by hydraulic type electrode extrusion press, processing is implemented to H08E wire rod, the extrusion Stress control of hydraulic type electrode extrusion press, at 10 ~ 15MPa, can prepare the 2.25Cr-1Mo alloy system welding rod with low temper brittleness.
Owing to adopting technical scheme described above, the present invention has following features:
1, preparation technology of the present invention is simple, function admirable, and welding rod smooth surface, bias are stable, yield rate is high.
2, the 2.25Cr-1Mo alloy system welding rod with low temper brittleness of the present invention, its all-position welding manufacturability is good, arc stability, clear, the de-slag in molten bath are easy, and appearance of weld is attractive in appearance.
3, its deposited metal diffusible hydrogen of 2.25Cr-1Mo alloy system welding rod of the present invention is lower, and the deposited metal diffusible hydrogen of gas chromatography determination is less than 2.5ml/100g.
4, its deposited metal of 2.25Cr-1Mo alloy system welding rod of the present invention is through minimum thermal process as toughness after 690 DEG C × 8h is splendid, can reach more than 160J at the v-notch ballistic work of-30 DEG C.
5, the temper embrittlement sensitiveness of its deposited metal of 2.25Cr-1Mo alloy system welding rod of the present invention is less, and the cold front Vtr54 in rank is about-75 DEG C, and the cold rear Vtr54 in rank is about-60 DEG C, and VTr54+3 Δ VTr54=-25 DEG C, meets requirement the harshest in present stage engineering completely.
Accompanying drawing explanation
Fig. 1 is conventional ladder cooling curve sketch.
Detailed description of the invention
The present invention is a kind of 2.25Cr-1Mo alloy system welding rod with low temper brittleness, the maximum feature of this welding rod is that the temper embrittlement sensitiveness of deposited metal is less, the cold front Vtr54 in rank is about-75 DEG C, the cold rear Vtr54 in rank is about-60 DEG C, VTr54+3 Δ VTr54=-25 DEG C, meet requirement the harshest in present stage engineering completely, can all-position welding, manufacturability is good, arc stability, few, the de-slag of splashing are easy, deposited metal has good low-temperature toughness.
Welding rod of the present invention by core wire, coating and binding agent three part form, wherein core wire adopts the H08E wire rod of low S, P, coating contains calcite and fluorite, brium carbonate, zircon sand, rutile, atomization ferrosilicon, electrolytic manganese metal, ferrotianium, crome metal, metal molybdenum, metallic nickel, rare earth fluoride, calcium-silicon, soda ash, binding agent adopts pure sodium silicate, and preparation 2.25Cr-1Mo alloy system welding rod uses hydraulic type electrode extrusion press.
The marble of gas making or slag making, brium carbonate, fluorite, rutile, zircon sand has been selected in coating, the electrolytic manganese metal of deoxidation, atomization ferrosilicon, ferrotianium, calcium-silicon are selected, the crome metal of transition alloy elements, metal molybdenum are selected, and improving the soda ash of extrusion, in coating, the chemical composition of each component is see shown in technical scheme.
The present invention selects the raw material that the impurity contents such as P, Sb, Sn, As are lower in core wire and each component of coating as far as possible, to reduce these impurity to the transition in deposited metal, reduces the X coefficient of deposited metal.
Consider from the physical property of slag, Reasonable adjustment calcite and fluorite, brium carbonate, the proportioning of rutile, zircon sand, make slag have suitable fusing point, viscosity and surface tension, to improve the manufacturability of all-position welding.
Adopt novel C aO-BaO-CaF
2-SiO
2-ZrO
2-TiO
2slag system, the feature of this slag system is that basicity is higher, and not only desulfurized effect is obvious, and also has stronger removing impurities matter P, the effect of Sb, Sn, As, and make deposited metal purer, X coefficient is lower.
The content of Mn and Si in strict control deposited metal, the Si<0.3% as Mn<0.85%, especially the content of Si can reduce the J coefficient of deposited metal.Although the reduction of Mn, Si content may cause deposited metal deoxidation not enough, unfavorable to the toughness of deposited metal, the present invention, by adding appropriate ferrotianium and calcium-silicon, can improve the deoxidizing capacity of coating.
With the addition of a certain amount of rare earth fluoride in coating, rare earth fluoride can reduce on the one hand the diffusible hydrogen in deposited metal, on the one hand can crystal grain thinning, improves the low-temperature flexibility of deposited metal.
With the addition of a certain amount of zircon sand in coating, zircon sand can improve the manufacturability of vertical position welding on the one hand, to a certain amount of Zr of transition in deposited metal, can play Grain refinement on the one hand, improves the effect of Low Temperature Toughness of Deposited Metals.
With the addition of a small amount of Ni in coating, in deposited metal Ni content lower than 0.2% time can improve its low-temperature flexibility, can temper brittleness be increased during more than 0.2%.
Three lifted below embodiments can be made technical scheme of the present invention by weight and further illustrating.
By upper table proportioning, each for coating component is carried out blending mixing, add pure sodium silicate by 22 ~ 26% of coating gross weight again and stir, by hydraulic type electrode extrusion press, extrusion processing is implemented to H08E wire rod, the extrusion Stress control of hydraulic type electrode extrusion press is at 10 ~ 15MPa, the 2.25Cr-1Mo alloy system welding rod with low temper brittleness can be prepared, welding rod is detected, before welding detects, welding rod cures 2 hours through 350 ~ 380 DEG C, then deposited metal composition analysis is carried out according to GB GB/T 5118-2012 regulation, deposited metal Mechanics Performance Testing and deposited metal diffusible hydrogen content measure, for Φ 4.0mm welding rod, welding condition is: source of welding current DC reverse connection, welding current 170 ~ 180A, weldingvoltage 22 ~ 28V, temperature 160 ~ 250 DEG C between road, postwelding minimum thermal process 690 DEG C insulation 8h, rank cold test after minimum thermal process is carried out according to Fig. 1 curve, test result is as follows respectively shown in table.
Deposited metal composition wt% and X coefficient, J coefficient detection reference data table
| C | Mn | Si | P | S | Ni | Cr | Mo | X coefficient | J coefficient | |
| Embodiment 1 | 0.092 | 0.717 | 0.230 | 0.0061 | 0.002 | 0.128 | 2.15 | 1.05 | 6.5ppm | 61% |
| Embodiment 2 | 0.093 | 0.707 | 0.272 | 0.0066 | 0.002 | 0.118 | 2.21 | 1.09 | 7.1ppm | 66% |
| Embodiment 3 | 0.097 | 0.852 | 0.264 | 0.0071 | 0.002 | 0.112 | 2.28 | 1.15 | 7.6ppm | 71% |
Deposited metal diffusible hydrogen content reference data table, adopts gas chromatography to detect
Deposited metal mechanical property reference data table, adopts 690 DEG C × 8h heat treatment
| R p0.2/MPa | Rm/MPa | A/% | A kv /J(-30℃) | |
| Embodiment 1 | 505 | 655 | 27.5 | 179,190,235 |
| Embodiment 2 | 498 | 636 | 28 | 169,164,185 |
| Embodiment 3 | 516 | 662 | 27 | 188,208,192 |
Cold test tough/crisp transition temperature Vtr54 in rank after minimum thermal process and minimum thermal process
Can obviously be found out by above-mentioned each table: the all-position welding manufacturability of welding rod of the present invention is good, stable mechanical property, diffusible hydrogen content is low, temper embrittlement sensitiveness is low, meet AWS A5.5 E9015-B3, the requirement of GB/T-5118-2012 and NB/T47018.2-2011 standard, can meet welding temper brittleness being required to high 12Cr2Mo1R GB150-1998.
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples, discloses object of the present invention and is intended to protect all changes and improvements in the scope of the invention.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and the scope of the invention and improvement.
Claims (1)
1. one kind has the alloy system welding rod of low temper brittleness, this 2.25Cr-1Mo alloy system welding rod by core wire, coating and binding agent three part form, wherein core wire adopts the H08E wire rod of low S, P, coating contains calcite and fluorite, brium carbonate, zircon sand, rutile, atomization ferrosilicon, electrolytic manganese metal, ferrotianium, crome metal, metal molybdenum, metallic nickel, rare earth fluoride, calcium-silicon, soda ash, binding agent adopts pure sodium silicate, preparation 2.25Cr-1Mo alloy system welding rod uses hydraulic type electrode extrusion press, it is characterized in that:
Require that each chemical composition wt.% of H08E wire rod reaches: C≤0.010, Mn 0.35 ~ 0.60, Si≤0.030, S≤0.005, P≤0.005;
Require the modulus of pure sodium silicate to reach 3.2, Baume degrees controls at 42 ~ 43 °, require that each chemical composition wt.% of pure sodium silicate reaches: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010;
Coating proportioning is by weight: 30 ~ 42 parts of marbles, 17 ~ 23 parts of fluorites, 7 ~ 10 parts of brium carbonates, 3 ~ 6 parts of zircon sands, 3 ~ 5 parts of import rutile, 4 ~ 6 parts of atomization ferrosilicon, 2 ~ 4 parts of electrolytic manganese metals, 2 ~ 4 parts of ferrotianiums, 7 ~ 8 parts of crome metals, 3 ~ 4 parts of metal molybdenum, 0.4 ~ 0.6 part of metallic nickel, 1 ~ 3 part of rare earth fluoride, 1 ~ 2 part of calcium-silicon, 0.5 ~ 1.5 part of soda ash;
In above-mentioned coating is formed:
Marmorean granularity requirements reaches 40 orders, and marmorean each chemical composition wt.% reaches: CaCO
3>=98.0, S≤0.010, P≤0.010;
The granularity requirements of fluorite reaches 60 orders, and each chemical composition wt.% of fluorite reaches: CaF
2>=95.0, SiO
2≤ 1.0, S≤0.010, P≤0.010;
Each chemical composition wt.% of brium carbonate reaches: BaCO
3>=98.0, S≤0.08, P≤0.005;
The granularity requirements of zircon sand reaches 40 orders, and each chemical composition wt.% of zircon sand reaches: SiO
2>=30, ZrO
2>=60, S≤0.004, P≤0.010;
The granularity requirements of rutile reaches 60 orders, and each chemical composition wt.% of rutile reaches: TiO
2>=95.0, S≤0.02, P≤0.02;
The granularity requirements of atomization ferrosilicon reaches 40 orders, and each chemical composition wt.% of atomization ferrosilicon reaches: Si 43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010;
The granularity requirements of electrolytic manganese metal reaches 60 orders, and each chemical composition wt.% of electrolytic manganese metal reaches: C≤0.01, S≤0.03, P≤0.01, Si<0.050, Mn >=99.5;
The granularity requirements of ferrotianium reaches 40 orders, and each chemical composition wt.% of ferrotianium reaches: Ti 25 ~ 35, S≤0.03, P≤0.02, Al≤8.0, Si≤4.5;
The granularity requirements of crome metal reaches 100 orders, and each chemical composition wt.% of crome metal reaches: Cr>=99.0, C≤0.020, S
≤0.010, P≤0.010;
The granularity requirements of metal molybdenum reaches 100 orders, and each chemical composition wt.% of metal molybdenum reaches: Mo >=99.0, C≤0.020, S≤0.010, P≤0.010;
The granularity requirements of metallic nickel reaches 80 orders, and each chemical composition wt.% of metallic nickel reaches: Ni+Co >=99.5, C≤0.05, S≤0.005, P≤0.005;
Each chemical composition wt.% of rare earth fluoride reaches: REO >=80, F >=25;
The granularity requirements of calcium-silicon reaches 40 orders, and each chemical composition wt.% of calcium-silicon reaches: Si >=60, Ca >=28, S≤0.050, P≤0.010;
The granularity requirements of soda ash reaches 60 orders, and each chemical composition wt.% of soda ash reaches: Na
2cO
3>=98.0;
Each for above-mentioned coating component is carried out blending mixing, add pure sodium silicate by 22 ~ 26% of coating gross weight again and stir, by hydraulic type electrode extrusion press, processing is implemented to H08E wire rod, the extrusion Stress control of hydraulic type electrode extrusion press, at 10 ~ 15MPa, can prepare the 2.25Cr-1Mo alloy system welding rod with low temper brittleness.
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| CN105234592A (en) * | 2015-10-15 | 2016-01-13 | 洛阳双瑞特种合金材料有限公司 | High-strength-level single-side welding and double-side forming root welding welding bar |
| CN105215580B (en) * | 2015-11-16 | 2017-06-20 | 洛阳双瑞特种合金材料有限公司 | A kind of E309L stainless steels that can be used for high current welding lengthen welding rod |
| CN105215580A (en) * | 2015-11-16 | 2016-01-06 | 洛阳双瑞特种合金材料有限公司 | A kind of E309L stainless steel that can be used for big current welding adds Long Welding rod |
| CN105234593A (en) * | 2015-11-20 | 2016-01-13 | 四川大西洋焊接材料股份有限公司 | All-position-operation low alloy steel manual electric welding rod applied to chrome-molybdenum critical hydrogen steel |
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| CN106392382A (en) * | 2016-12-06 | 2017-02-15 | 攀枝花学院 | J507 welding rod with high deposition rate, and preparation method thereof |
| CN109623192A (en) * | 2018-12-21 | 2019-04-16 | 洛阳双瑞特种合金材料有限公司 | Stainless steel electrode core wire, stainless steel electrode and preparation and application with very small temperature rise |
| CN109623192B (en) * | 2018-12-21 | 2021-06-01 | 中国船舶重工集团公司第七二五研究所 | Stainless steel welding rod core wire with extremely low temperature rise, stainless steel welding rod, preparation and application |
| CN110076476A (en) * | 2019-04-19 | 2019-08-02 | 黄石市高潮工矿机械有限公司 | A kind of high-strength composite solder |
| CN111037153A (en) * | 2019-12-27 | 2020-04-21 | 中国第一重型机械集团大连加氢反应器制造有限公司 | E316H type welding rod for manufacturing fast neutron reactor equipment |
| CN110860819A (en) * | 2019-12-28 | 2020-03-06 | 哈尔滨威尔焊接有限责任公司 | Ultralow-hydrogen welding rod for welding 12Cr2Mo1R steel hydrogenation device |
| CN113458656A (en) * | 2021-07-09 | 2021-10-01 | 昆山京群焊材科技有限公司 | 2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and preparation method thereof |
| CN114310031A (en) * | 2021-12-01 | 2022-04-12 | 武汉铁锚焊接材料股份有限公司 | High-strength high-toughness welding rod capable of being subjected to heat treatment |
| CN114310031B (en) * | 2021-12-01 | 2023-08-15 | 武汉铁锚焊接材料股份有限公司 | High-strength high-toughness welding rod capable of being subjected to heat treatment |
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