CN109706402B - Preparation method of duplex stainless steel consumable electrode gas shielded welding wire - Google Patents
Preparation method of duplex stainless steel consumable electrode gas shielded welding wire Download PDFInfo
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- CN109706402B CN109706402B CN201811609025.6A CN201811609025A CN109706402B CN 109706402 B CN109706402 B CN 109706402B CN 201811609025 A CN201811609025 A CN 201811609025A CN 109706402 B CN109706402 B CN 109706402B
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Abstract
The invention discloses a preparation method of a duplex stainless steel gas metal arc welding wire, which comprises the steps of sequentially carrying out peeling, involucra treatment, rough drawing, acid cleaning, annealing, sanding and final treatment on a duplex stainless steel wire with specific chemical composition, wherein the prepared duplex stainless steel gas metal arc welding wire has a bright surface and does not have the defects of pull marks, cracks, warping and the like, and meanwhile, the microstructure is fine and uniform. The duplex stainless steel gas metal arc welding wire has excellent mechanical properties, the tensile strength is 1100-1300 MPa, the elongation is 5-10%, the HRC hardness is 25-30, the duplex stainless steel gas metal arc welding wire has excellent corrosion resistance and stress corrosion cracking resistance, can work in various corrosion medium environments including sulfuric acid, hydrochloric acid, phosphoric acid, caustic alkali and the like, can be widely applied to welding of ocean engineering structures within the environmental temperature limit of-40 ℃, and effectively improves the pitting corrosion resistance and the stress corrosion cracking resistance of the welding structures in seawater.
Description
Technical Field
The invention relates to a preparation method of a welding wire, in particular to a preparation method of a gas shielded welding wire of a duplex stainless steel consumable electrode.
Background
With the continuous development of the manufacturing industries of nuclear power, supercritical (ultra) boilers, ocean engineering, long-distance pipelines and the like in China and the continuous improvement of the quality of new steel products, various pressure containers, offshore oil production platforms and the like have been developed towards high parameters, high temperature and high pressure (or low temperature), the working conditions are more and more severe, and more strict requirements are provided for the quality of welding material products.
The 2209 series welding materials are developed along with the appearance of the second generation duplex stainless steel 2205, but the mechanical property, welding manufacturability, corrosion resistance and the like of the materials are still to be improved at present. Because the production flow of the duplex stainless steel gas metal shielded welding wire is long and the control difficulty is high, the high-quality duplex stainless steel gas metal shielded solid welding wire applied to special industries still needs to be imported at present.
Disclosure of Invention
The invention aims to solve the technical problem that the prepared duplex stainless steel gas metal arc welding wire has excellent mechanical property, the tensile strength of 1100-1300 MPa, the elongation of 5-10% and the HRC hardness of 25-30, can work in various corrosive medium environments such as sulfuric acid, hydrochloric acid, phosphoric acid and caustic alkali, can be widely applied to ocean engineering structure welding within the limit of environmental temperature of-40 ℃, and can effectively improve the pitting corrosion resistance and stress corrosion cracking resistance of a welding structure in seawater.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a duplex stainless steel gas shielded welding wire for a consumable electrode comprises the following steps:
step one, peeling: preparing a biphase stainless steel wire with phi 5.5mm, wherein the biphase stainless steel wire comprises the following components in percentage by weight: 21.0-23.5% of Cr21.5%, 7.5-9.5% of Ni0, 2.5-3.5% of Mo2, 0.5-2.0% of Mn0.5, less than or equal to 0.03% of C, less than or equal to 0.9% of Si, less than or equal to 0.03% of P, less than or equal to 0.01% of S, less than or equal to 0.4% of Cu, less than or equal to 0.2% of N, and the balance of Fe and inevitable; peeling to phi 5.35mm on a peeling machine at the speed of 7-8 m/min;
step two, involucra treatment: performing involucra treatment on the surface of the phi 5.35 duplex stainless steel wire in an involucra tank filled with the involucra agent solution, and then drying;
step three, rough pumping: drawing the double-phase stainless steel wire subjected to the film treatment and dried on a wire drawing machine in a single way or multiple ways, wherein the total surface reduction rate is 28-45%;
step four, acid washing: carrying out electrolytic pickling on the roughly-drawn duplex stainless steel wire in a pickling tank;
step five, annealing: carrying out online bright annealing at 1000-1080 ℃ on the acid-washed duplex stainless steel wire, wherein the wiring speed of the duplex stainless steel wire in an annealing furnace is 1.5-3 m/min; quenching to room temperature within 1-3 min after on-line bright annealing;
step six, sanding: performing surrounding type grinding and polishing on the annealed duplex stainless steel wire on an abrasive belt grinding machine;
step seven, final treatment: and (3) carrying out single-pass or multi-pass drawing on the sanded duplex stainless steel wire on a wire drawing machine, wherein the total surface reduction rate is 38-50%, drawing to phi 3.2mm, and carrying out fixed disc packaging to obtain a finished product of the duplex stainless steel gas metal arc welding wire.
Preferably, the microstructure of the finished product of the duplex stainless steel gas metal arc welding wire prepared by the method comprises 50-75% of ferrite and 25-50% of austenite.
Preferably, in the second step, the used coating agent is a product with the model number of PM-02 provided by Hebei Naitai chemical Co., Ltd, and the specific gravity of the coating agent solution is 1.13-1.15 g/cm3The temperature of the coating agent solution is 70-110 ℃, and the coating treatment time is 5-30 min; the drying temperature is 70-160 ℃, and the drying time is 30-50 min.
Preferably, in the fourth step, the concentration of the sulfuric acid solution in the pickling tank is 180-280 g/L, the electrolytic current is 300-400A, and the electrolytic voltage is 1-10V.
Preferably, in step six, the abrasive belt used is a 320# alumina abrasive belt.
Compared with the prior art, the invention has the following advantages: the preparation method of the invention carries out peeling, skin membrane treatment, rough drawing, acid cleaning, annealing, sanding and final treatment on the duplex stainless steel wire with specific chemical composition in sequence, wherein the peeling, skin membrane treatment, acid cleaning and sanding can ensure that the wire has no surface defect, and the annealing, multi-drawing and surface reduction rate control are combined, so that the prepared duplex stainless steel consumable electrode gas shielded welding wire has bright surface and no draw mark, crack, warping and other defects, and the microstructure of the prepared duplex stainless steel consumable electrode gas shielded welding wire is fine and uniform. The duplex stainless steel gas metal-shielded welding wire prepared by the invention has excellent mechanical properties, the tensile strength of 1100-1300 MPa, the elongation of 5-10 percent and the HRC hardness of 25-30, has excellent corrosion resistance and stress corrosion cracking resistance, can work in various corrosive medium environments including sulfuric acid, hydrochloric acid, phosphoric acid, caustic alkali and the like, can be widely applied to welding of ocean engineering structures within the limit of-40 ℃, and effectively improves the pitting corrosion resistance and stress corrosion cracking resistance of the welding structures in seawater. The duplex stainless steel gas metal shielded welding wire prepared by the invention can be used for welding the duplex stainless steel such as SAF2304, S31803 and S32205, and is used for short-arc welding, spray arc welding or pulse arc welding and the like of pipeline systems, oil outlet pipelines, risers and the like of oil and gas of ocean platforms, petrochemical equipment and the like.
Drawings
FIG. 1 is a metallographic picture (1000X) of a finished duplex stainless steel gas shielded welding wire prepared in example 1;
FIG. 2 is a metallographic picture (1000X) of a finished duplex stainless steel gas shielded welding wire prepared in example 2.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The method of making a duplex stainless steel consumable electrode gas shielded welding wire of embodiment 1, comprising the steps of:
step one, peeling: preparing a biphase stainless steel wire with phi 5.5mm, wherein the biphase stainless steel wire comprises the following components in percentage by weight: 21.8 percent of Cr21.8 percent, 7.8 percent of Nis, 2.6 percent of Mos, 0.7 percent of Mn0.03 percent, less than or equal to 0.03 percent of C, less than or equal to 0.9 percent of Si, less than or equal to 0.03 percent of P, less than or equal to 0.01 percent of S, less than or equal to 0.4 percent of Cu, less than or equal to 0.2 percent of N, and the balance of Fe; peeling to phi 5.35mm on a peeling machine at the speed of 7 m/min;
step two, involucra treatment: performing involucra treatment on the surface of the phi 5.35 duplex stainless steel wire in an involucra tank filled with the involucra agent solution, and then drying; wherein the specific gravity of the coating agent solution is 1.13g/cm3The temperature of the coating agent solution is 85 ℃, and the coating treatment time is 18 min; the drying temperature is 120 ℃, and the drying time is 35 min;
step three, rough pumping: drawing the biphase stainless steel wire subjected to the film treatment and drying on a drawing machine to draw phi 5.35mm and phi 4.8mm and phi 4.3 mm;
step four, acid washing: carrying out electrolytic pickling on the roughly-pumped duplex stainless steel wire in a pickling tank, wherein the concentration of a sulfuric acid solution contained in the pickling tank is 200g/L, the electrolytic current is 350A, and the electrolytic voltage is 5V;
step five, annealing: carrying out on-line bright annealing at 1020 ℃ on the acid-washed duplex stainless steel wire, wherein the wiring speed of the duplex stainless steel wire in an annealing furnace is 1.5 m/min; quenching to room temperature within 1-2 min after on-line bright annealing;
step six, sanding: performing surrounding type grinding and polishing on the annealed duplex stainless steel wire on an abrasive belt grinding machine, wherein the used abrasive belt is a 320# alumina abrasive belt;
step seven, final treatment: drawing the sanded duplex stainless steel wire on a wire drawing machine, drawing 3.6mm phi 3.2mm phi by phi 4.3mm phi, and packaging in a fixed disc to obtain a finished product of the duplex stainless steel gas metal arc welding wire.
The finished product of the duplex stainless steel gas metal arc welding wire prepared in the embodiment 1 has a bright surface and has no defects of pull marks, cracks, warping and the like, and a metallographic picture of the finished product is shown in a figure 1. As can be seen from fig. 1, the microstructure is fine and uniform, and the area content of ferrite in the microstructure is about 60% and the austenite content is about 40%.
Through tests, the finished product of the duplex stainless steel gas metal arc welding wire prepared in the example 1 has the tensile strength of 1139MPa, the elongation of 8 percent and the HRC hardness of 26.
S31803 stainless steel is welded by the duplex stainless steel gas metal arc welding wire finished product prepared in the embodiment 1, and the phenomena of obvious pitting corrosion and stress corrosion cracking do not occur at the welding seam after three months of simulated seawater environment test.
The method for preparing a duplex stainless steel gas metal arc welding wire of embodiment 2, comprising the steps of:
step one, peeling: preparing a biphase stainless steel wire with phi 5.5mm, wherein the biphase stainless steel wire comprises the following components in percentage by weight: 22.9 percent of Cr22.5 percent of Ni8.5 percent of Mo3.0 percent of Mn1.8 percent of C, less than or equal to 0.03 percent of Si, less than or equal to 0.03 percent of P, less than or equal to 0.01 percent of S, less than or equal to 0.4 percent of Cu, less than or equal to 0.2 percent of N, and the balance of Fe and inevitable impurities; peeling to phi 5.35mm on a peeling machine at the speed of 8 m/min;
step two, involucra treatment: performing involucra treatment on the surface of the phi 5.35 duplex stainless steel wire in an involucra tank filled with the involucra agent solution, and then drying; wherein the specific gravity of the coating agent solution is 1.15g/cm3The temperature of the coating agent solution is 100 ℃, and the coating treatment time is 25 min; the drying temperature is 100 ℃, and the drying time is 45 min;
step three, rough pumping: drawing the biphase stainless steel wire with the processed and dried film on a drawing machine to draw phi 5.35mm and phi 4.6mm and phi 4.1 mm;
step four, acid washing: carrying out electrolytic pickling on the roughly-pumped duplex stainless steel wire in a pickling tank, wherein the concentration of a sulfuric acid solution contained in the pickling tank is 260g/L, the electrolytic current is 380A, and the electrolytic voltage is 8V;
step five, annealing: carrying out on-line bright annealing at 1060 ℃ on the acid-washed duplex stainless steel wire, wherein the wiring speed of the duplex stainless steel wire in an annealing furnace is 2.5 m/min; rapidly cooling to room temperature within 2-3 min after on-line bright annealing;
step six, sanding: performing surrounding type grinding and polishing on the annealed duplex stainless steel wire on an abrasive belt grinding machine, wherein the used abrasive belt is a 320# alumina abrasive belt;
step seven, final treatment: and drawing the sanded duplex stainless steel wire on a wire drawing machine for one or more passes, drawing 3.5mm phi 3.2mm phi from 4.1mm phi, and packaging in a fixed disc to obtain the finished product of the duplex stainless steel gas metal arc welding wire.
The finished product of the duplex stainless steel gas metal arc welding wire prepared in the embodiment 2 has a bright surface and has no defects of pull marks, cracks, warping and the like, and a metallographic picture of the finished product is shown in fig. 2. As can be seen from fig. 2, the microstructure is fine and uniform, and the area content of ferrite in the microstructure is about 70% and the austenite content is about 30%.
Through testing, the finished product of the duplex stainless steel gas metal arc welding wire prepared in the example 2 has the tensile strength of 1283MPa, the elongation of 6 percent and the HRC hardness of 29.
The finished product of the duplex stainless steel gas metal arc welding wire prepared in the embodiment 2 is used for welding S32205 stainless steel, and the phenomena of obvious pitting corrosion and stress corrosion cracking do not occur at the welding seam after six months of simulated seawater environment test.
Claims (4)
1. A preparation method of a duplex stainless steel gas shielded welding wire for a consumable electrode is characterized by comprising the following steps:
step one, peeling: preparing a biphase stainless steel wire with phi 5.5mm, wherein the biphase stainless steel wire comprises the following components in percentage by weight: 21.0-23.5% of Cr21.5%, 7.5-9.5% of Ni0, 2.5-3.5% of Mo2, 0.5-2.0% of Mn0.5, less than or equal to 0.03% of C, less than or equal to 0.9% of Si, less than or equal to 0.03% of P, less than or equal to 0.01% of S, less than or equal to 0.4% of Cu, less than or equal to 0.2% of N, and the balance of Fe and inevitable; peeling to phi 5.35mm on a peeling machine at the speed of 7-8 m/min;
step two, involucra treatment: performing involucra treatment on the surface of the phi 5.35 duplex stainless steel wire in an involucra tank filled with the involucra agent solution, and then drying;
step three, rough pumping: drawing the double-phase stainless steel wire subjected to the film treatment and dried on a wire drawing machine in a single way or multiple ways, wherein the total surface reduction rate is 28-45%;
step four, acid washing: carrying out electrolytic pickling on the roughly-drawn duplex stainless steel wire in a pickling tank;
step five, annealing: carrying out online bright annealing at 1000-1080 ℃ on the acid-washed duplex stainless steel wire, wherein the wiring speed of the duplex stainless steel wire in an annealing furnace is 1.5-3 m/min; quenching to room temperature within 1-3 min after on-line bright annealing;
step six, sanding: performing surrounding type grinding and polishing on the annealed duplex stainless steel wire on an abrasive belt grinding machine;
step seven, final treatment: and (3) carrying out single-pass or multi-pass drawing on the sanded duplex stainless steel wire on a wire drawing machine, wherein the total area reduction rate is 38-50%, drawing to phi 3.2mm, fixing and packaging to obtain a finished product of the duplex stainless steel gas metal arc welding wire, wherein in the microstructure of the finished product of the prepared duplex stainless steel gas metal arc welding wire, the area content of ferrite is 50-75%, and the content of austenite is 25-50%.
2. The preparation method of the duplex stainless steel gas shielded welding wire according to claim 1, wherein in the second step, the temperature of the coating agent solution is 70-110 ℃, and the coating treatment time is 5-30 min; the drying temperature is 70-160 ℃, and the drying time is 30-50 min.
3. The method for preparing a duplex stainless steel gas shielded welding wire according to claim 1, wherein in the fourth step, the concentration of the sulfuric acid solution contained in the pickling tank is 180-280 g/L, the electrolytic current is 300-400A, and the electrolytic voltage is 1-10V.
4. The method for preparing a duplex stainless steel gas shielded welding wire according to claim 1, wherein in the sixth step, the abrasive band used is 320# alumina abrasive band.
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| CN110747398A (en) * | 2019-11-13 | 2020-02-04 | 江阴康瑞成型技术科技有限公司 | Stainless steel wire for spectacle frame and processing technology thereof |
| CN110883495A (en) * | 2019-11-21 | 2020-03-17 | 浙江翰德圣智能再制造技术有限公司 | Online repair process for rotary valve rotor sealing surface |
| CN113798728A (en) * | 2021-09-14 | 2021-12-17 | 哈尔滨威尔焊接有限责任公司 | Austenitic stainless steel welding wire and preparation method and application thereof |
| CN114107638A (en) * | 2021-10-25 | 2022-03-01 | 浙江腾龙精线有限公司 | Processing method of steel wire for armored cable |
| CN115976320B (en) * | 2022-12-28 | 2024-09-24 | 浙江青山钢铁有限公司 | Surface treatment method for high-carbon martensitic stainless steel wire rod |
| CN116423098A (en) * | 2023-03-20 | 2023-07-14 | 江阴泰坦高压电气有限公司 | Stainless steel welding wire with good low temperature resistance, impact resistance and deposition resistance and production method thereof |
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| SE501321C2 (en) * | 1993-06-21 | 1995-01-16 | Sandvik Ab | Ferrite-austenitic stainless steel and use of the steel |
| JP3454354B2 (en) * | 1999-06-25 | 2003-10-06 | 日鐵住金溶接工業株式会社 | Austenitic / ferritic duplex stainless steel welding material and method for welding high Cr steel using the same |
| KR100694312B1 (en) * | 2005-12-19 | 2007-03-14 | 포스코신기술연구조합 | High Ni Duplex Stainless Steel for Welding Rods with Improved Hot Workability |
| CN102011067A (en) * | 2010-12-14 | 2011-04-13 | 江苏大学 | Cavitation corrosion resistant dual-phase stainless steel |
| EP3055101A2 (en) * | 2013-10-09 | 2016-08-17 | Hobart Brothers Company | Systems and methods for corrosion-resistant welding electrodes |
| CN104759784A (en) * | 2015-04-02 | 2015-07-08 | 江苏科技大学 | Kernel I-grade 2209 double-phase stainless steel welding wire and manufacturing method |
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| CN108788519B (en) * | 2018-09-11 | 2020-11-06 | 江苏思迪彼特新材料科技有限公司 | Preparation process and application of high-strength stainless steel electric arc welding flux-cored wire |
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