CN109249152B - Special hard surfacing welding wire for mandrel for rolling seamless steel tube and preparation method - Google Patents
Special hard surfacing welding wire for mandrel for rolling seamless steel tube and preparation method Download PDFInfo
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- CN109249152B CN109249152B CN201811036147.0A CN201811036147A CN109249152B CN 109249152 B CN109249152 B CN 109249152B CN 201811036147 A CN201811036147 A CN 201811036147A CN 109249152 B CN109249152 B CN 109249152B
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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
- B23K35/36—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
- B23K35/368—Selection of non-metallic compositions of core 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
- B23K35/22—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
- B23K35/3053—Fe as the principal constituent
-
- 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
The invention discloses a special hard surfacing welding wire for a mandrel for rolling a seamless steel pipe and a preparation method thereof, and the special hard surfacing welding wire comprises the following components in percentage by weight: fluorite 3.5-4.5 weight portions, zirconium dioxide 0.1-0.5 weight portion, capacitance magnesia 0.5-2.0 weight portions, LaAlO30.1 to 0.3 weight portion, 4.0 to 5.0 weight portions of medium carbon ferromanganese, 4.5 to 5.5 weight portions of high carbon ferromanganese, 0.9 to 1.5 weight portions of metal chromium, 0.5 to 1.0 weight portion of 75 ferrosilicon, 1.5 to 2.5 weight portions of ferromolybdenum, 1.0 to 3.0 weight portions of ferrovanadium, 0.1 to 0.5 weight portion of tungsten powder and 9.7 to 12.2 weight portions of iron powder. The submerged arc surfacing flux-cored wire has the advantages of good crack resistance, high quality and good process performance, small smoke dust, easy slag removal, good weld joint forming and good re-arc striking performance, and completely meets the high requirement standard of repairing an inner hole rolling core rod used in steel pipe rolling.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a special hard surfacing welding wire for a mandrel for rolling a seamless steel pipe, a preparation method and a welding method.
Background
With the rapid development of automation and digitization in China, the requirement on welding materials is higher and higher. Welding production is moving towards high efficiency, low cost, high quality. The hard surfacing flux-cored wire is widely applied to various fields as a welding material with great development prospect, and the proportion of the hard surfacing flux-cored wire in the welding material is rapidly increased.
Just as the rapid development of various fields, the flux-cored wire is popular with mass production and manufacturing enterprises due to the characteristics of high production efficiency, good welding quality and low comprehensive production cost. The repair of the inner hole rolling core rod used when a seamless steel tube manufacturer rolls a steel tube is less in market and unstable in process because welding materials of the inner hole rolling core rod mainly depend on import. Therefore, great challenge and pressure are brought to relevant manufacturing enterprises, and the research and development of the surfacing flux-cored wire with low cost, high quality and stable process performance are necessary requirements of the market.
CN1923435A discloses a build-up welding flux-cored wire for repairing a working layer of a cold-rolled intermediate roll. Although it can be used for build-up welding, when it is used for mandrel welding for rolling a seamless steel pipe, it does not fit with the mandrel for rolling a seamless steel pipe, and the welding process and quality are poor.
The above drawbacks are also present in the various flux-cored wires of hypereutectic iron-chromium-carbon-titanium-niobium-nitrogen-lanthanum aluminate for additive manufacturing of arc surfacing disclosed in CN 107138874A.
Disclosure of Invention
The invention aims to provide a special hard-face surfacing welding wire for a mandrel for rolling a seamless steel pipe and a preparation method thereof.
The technical scheme is as follows: a special hard surfacing welding wire for a mandrel for rolling a seamless steel tube and a preparation method thereof are disclosed, the welding wire consists of a sheath steel belt and a flux core, and the flux core consists of the following components in percentage by weight: fluorite 3.5-4.5 weight portions, zirconium dioxide 0.1-0.5 weight portion, capacitance magnesia 0.5-2.0 weight portions, LaAlO30.1 to 0.3 weight portion, 4.0 to 5.0 weight portions of medium carbon ferromanganese, 4.5 to 5.5 weight portions of high carbon ferromanganese, 0.9 to 1.5 weight portions of metal chromium, 0.5 to 1.0 weight portion of 75 ferrosilicon, 1.5 to 2.5 weight portions of ferromolybdenum, 1.0 to 3.0 weight portions of ferrovanadium, 0.1 to 0.5 weight portion of tungsten powder and 9.7 to 12.2 weight portions of iron powder.
Preferably, the weight of the flux core is 20-38.5% of the weight of the welding wire, and the diameter of the flux core welding wire is phi 3.2 mm.
Preferably, the outer skin steel strip comprises the following components: 0.01-0.15% of C, 0.1-0.5% of Mn, 0.005-0.015% of Si, 0.005-0.010% of S, 0.005-0.015% of P, and the balance of iron and essential impurities.
Preferably, the outer skin steel strip comprises the following components: 0.01-0.05 wt% of C, 0.1-0.3 wt% of Mn, 0.005-0.01 wt% of Si, 0.005-0.010 wt% of S, 0.005-0.015 wt% of P, and the balance of iron and essential impurities.
Preferably, the fluorite is 4.5 parts by weight, the zirconium dioxide is 0.1 part by weight, the capacitance magnesite is 1.0 part by weight, and the LaAlO30.1 part by weight of medium carbon ferromanganese4.0 parts by weight of high-carbon ferromanganese 5.0 parts by weight, 1.0 part by weight of metal chromium, 0.5 part by weight of 75 ferrosilicon, 1.5 parts by weight of ferromolybdenum, 3.0 parts by weight of ferrovanadium, 0.5 part by weight of tungsten powder and 10 parts by weight of iron powder.
Preferably, the fluorite is 4.5 parts by weight, the zirconium dioxide is 0.2 parts by weight, the capacitance magnesite is 1.2 parts by weight, and the LaAlO30.2 part by weight of medium carbon ferromanganese 4.0 part by weight of high carbon ferromanganese 4.5 part by weight of chromium metal 1.2 part by weight of 75 ferrosilicon 0.7 part by weight of ferromolybdenum 1.5 part by weight of ferrovanadium 1.0 part by weight of tungsten powder 0.2 part by weight of iron powder 10.3 part by weight of iron powder.
Preferably, the fluorite is 4.5 parts by weight, the zirconium dioxide is 0.2 parts by weight, the capacitance magnesite is 1.2 parts by weight, and the LaAlO30.3 part by weight, 4.0 parts by weight of medium carbon ferromanganese, 5.5 parts by weight of high carbon ferromanganese, 1.2 parts by weight of metal chromium, 1.0 part by weight of 75 ferrosilicon, 2.0 parts by weight of ferromolybdenum, 2.0 parts by weight of ferrovanadium, 0.5 part by weight of tungsten powder and 10 parts by weight of iron powder.
Preferably, the fluorite is 4.5 parts by weight, the zirconium dioxide is 0.3 part by weight, the capacitance magnesite is 0.7 part by weight, and the LaAlO30.3 part by weight, 5.0 parts by weight of medium carbon ferromanganese, 4.5 parts by weight of high carbon ferromanganese, 1.5 parts by weight of metal chromium, 1.0 part by weight of 75 ferrosilicon, 2.5 parts by weight of ferromolybdenum, 3.0 parts by weight of ferrovanadium, 0.5 part by weight of tungsten powder and 12.2 parts by weight of iron powder.
The invention also aims to provide a preparation method of the special hard surfacing welding wire for the mandrel for rolling the seamless steel pipe.
The technical scheme is as follows: a preparation method of a special hard surfacing welding wire for a mandrel for rolling a seamless steel pipe comprises the following steps:
uniformly mixing all components of the medicine core for later use;
secondly, the sheath is placed in a welding wire forming machine, the flux-cored mixture for standby is injected into a U-shaped sheath groove which is formed by transverse bending, then the sheath is rolled into a wire, and the wire is finely drawn to phi 3.2mm, thus obtaining the special hard-face surfacing welding wire for the mandrel for rolling the seamless steel tube.
The invention also aims to provide a welding method of the high-linear-energy steel.
The technical scheme is as follows: the welding method for the large-wire energy steel adopts the special welding wire to weld the mandrel for rolling the seamless steel pipe, and has the following welding parameters: I400A, U26V, V30 m/h.
In the invention, the medium carbon ferromanganese: c is used as a deoxidizer and can generate gas, Mn is an important deoxidizer, and meanwhile, Mn has a strong solid solution strengthening effect and can improve brittleness and hardness; has an important influence on the strength and toughness of the weld metal. Metallic chromium: the alloy element Cr is transited to the molten metal, and the transition of the Cr element plays roles in deoxidation, strength improvement, hardness improvement and the like. 75 ferrosilicon: si is an important alloying agent for deposited metal, can reduce the oxygen content of weld metal and can improve the impact toughness of the deposited metal; the effect is better by adopting Si and Mn combined deoxidation. Ferromolybdenum: mo can improve the strength and hardness and improve the toughness. Vanadium iron: and (3) transferring the alloy element V into the welding seam, refining welding seam grains and improving the toughness of the welding seam. Tungsten powder: and an alloy element W is transited into the welding seam, so that the wear resistance is enhanced. Fluorite: the fluorine is used for slagging and gas making, and simultaneously, the fluorine is used for reducing the content of diffused hydrogen in deposited metal. Meanwhile, the method is beneficial to improving the air hole resistance, reducing the content of diffusible hydrogen and enhancing the low-temperature toughness of the welding seam. LaAlO3: can reduce the sulfur content of the overlaying layer and has the function of refining grains.
The invention principle and the beneficial effects are as follows:
the invention is suitable for the special hard surfacing flux-cored wire for the core rod surfacing for rolling the seamless steel pipe. Compared with the existing welding material, the cost of the welding material used in the user is obviously reduced, the service performance is excellent, and the wear resistance is good.
The invention has excellent processing performance and strong adaptability during welding, has no cracks, and the hardness meets the requirement that the hardness is HB320-350 after 580 ℃ multiplied by 4h tempering treatment designed during the repair and composite manufacture of the mandrel for rolling the seamless steel tube.
The submerged arc surfacing flux-cored wire has the advantages of good welding crack resistance, high quality and good process performance, has little smoke dust, easy slag removal, good weld joint forming and good re-arc striking performance, and completely meets the high requirement standard of repairing an inner hole rolling core rod used in steel pipe rolling.
Definition and interpretation
Unless otherwise specified, the symbols are mass%.
Unless otherwise specified, all the articles used in the present invention are commercially available products.
Detailed Description
The present invention will be further described with reference to the following examples.
In the following examples, the weight of the wire is the weight of the outer skin plus the weight of the flux core, and the base metal for welding is a mandrel bar for rolling a seamless steel pipe. The welding specification is that I is 400A, U is 26V, and V is 30 m/h.
Example 1
The low-carbon steel strip is used as the sheath of the welding wire, and the contents are as follows: c: 0.01 to 0.05 wt%, Mn: 0.1 to 0.3 wt%, Si: 0.005 to 0.01 wt%, S: 0.005-0.010 wt%, P: 0.005-0.015 wt%, and the balance of iron and essential impurities, wherein the content is calculated by the content of the outer skin steel strip being 100%.
The flux core comprises the following components in percentage by weight: fluorite: 4.5% and zirconium dioxide: 0.1%, capacitance magnesite: 1.0% of LaAlO3: 0.1%, medium carbon ferromanganese: 4.0%, high-carbon ferromanganese: 5.0%, chromium metal 1.0%, 75 ferrosilicon 0.5%, ferromolybdenum: 1.5%, ferrovanadium: 3.0%, tungsten powder: 0.5 percent of iron powder and 10 percent of iron powder, and then uniformly mixing all the components in the medicine core;
rolling the low-carbon steel strip into a U shape, adding the uniformly stirred medicinal powder, and wrapping, rolling and drawing the mixture into a shape with the diameter of 3.2mm in a butt joint mode.
After-welding heat treatment and detection, the surface of the alloy is well formed without cracks, and the average hardness is HB 345.
Example 2
Taking a low-carbon steel strip as a sheath of the welding wire, C: 0.01 to 0.05 wt%, Mn: 0.1 to 0.3 wt%, Si: 0.005 to 0.01 wt%, S: 0.005-0.010 wt%, P: 0.005-0.015 wt%, and the balance of iron and essential impurities; the amounts are based on 100% of the outer steel strip content.
The flux core comprises the following components in percentage by weight: fluorite: 4.5% and zirconium dioxide: 0.2%, capacitance magnesite: 1.2% LaAlO3: 0.2%, medium carbon ferromanganese: 4.0%, high-carbon ferromanganese:4.5%, metallic chromium: 1.2%, 75 ferrosilicon 0.7%, ferromolybdenum: 1.5%, ferrovanadium: 1.0%, tungsten powder: 0.2 percent of iron powder and 10.3 percent of iron powder, and then uniformly mixing all the components in the medicine core;
rolling the low-carbon steel strip into a U shape, adding the uniformly stirred medicinal powder, and wrapping, rolling and drawing the mixture into a shape with the diameter of 3.2mm in a butt joint mode.
After-welding heat treatment and detection, the surface of the alloy is well formed, has no cracks and has the average hardness of HB 332.
Example 3
Taking a low-carbon steel strip as a sheath of the welding wire, C: 0.01 to 0.05 wt%, Mn: 0.1 to 0.3 wt%, Si: 0.005 to 0.01 wt%, S: 0.005-0.010 wt%, P: 0.005-0.015 wt%, and the balance of iron and essential impurities; the amounts are based on 100% of the outer steel strip content.
The flux core comprises the following components in percentage by weight: fluorite: 4.5% and zirconium dioxide: 0.2%, capacitance magnesite: 1.2% LaAlO3: 0.3%, medium carbon ferromanganese: 4.0%, high-carbon ferromanganese: 5.5%, metallic chromium: 1.2%, 75 ferrosilicon 1.0%, ferromolybdenum: 2.0%, ferrovanadium: 2.0%, tungsten powder: 0.5 percent of iron powder and 10 percent of iron powder, and then uniformly mixing all the components in the medicine core;
rolling the low-carbon steel strip into a U shape, adding the uniformly stirred medicinal powder, and wrapping, rolling and drawing the mixture into a shape with the diameter of 3.2mm in a butt joint mode.
After-welding heat treatment and detection, the surface of the alloy is well formed, has no cracks and has the average hardness of HB 348.
Example 4
The low-carbon steel strip is used as the sheath of the welding wire and comprises the following components: c: 0.01 to 0.05 wt%, Mn: 0.1 to 0.3 wt%, Si: 0.005 to 0.01 wt%, S: 0.005-0.010 wt%, P: 0.005-0.015 wt%, and the balance of iron and essential impurities; the amounts are based on 100% of the outer steel strip content.
The flux core comprises the following components in percentage by weight: fluorite: 4.5% and zirconium dioxide: 0.3%, capacitance magnesite: 0.7% of LaAlO3: 0.3%, medium carbon ferromanganese: 5.0%, high-carbon ferromanganese: 4.5%, metallic chromium: 1.5%, 75 ferrosilicon 1.0%, ferromolybdenum: 2.5 percent of ferrovanadium: 3.0%, tungsten powder: 0.5 percent of iron powder and 12.2 percent of iron powder, and then uniformly mixing all the components in the medicine core;
rolling the low-carbon steel strip into a U shape, adding the uniformly stirred medicinal powder, and wrapping, rolling and drawing the mixture into a shape with the diameter of 3.2mm in a butt joint mode.
After-welding heat treatment and detection, the surface of the alloy is well formed, has no cracks and has the average hardness of HB 330.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and all equivalent variations and modifications made in the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A special hard surfacing welding wire for a mandrel for rolling a seamless steel tube is composed of a sheath steel belt and a flux core, and is characterized in that the flux core comprises the following components in percentage by weight: fluorite 3.5-4.5 weight portions, zirconium dioxide 0.1-0.5 weight portion, capacitance magnesia 0.5-2.0 weight portions, LaAlO30.1 to 0.3 weight portion, 4.0 to 5.0 weight portions of medium carbon ferromanganese, 4.5 to 5.5 weight portions of high carbon ferromanganese, 0.9 to 1.5 weight portions of metal chromium, 0.5 to 1.0 weight portion of 75 ferrosilicon, 1.5 to 2.5 weight portions of ferromolybdenum, 1.0 to 3.0 weight portions of ferrovanadium, 0.1 to 0.5 weight portion of tungsten powder and 9.7 to 12.2 weight portions of iron powder.
2. The hardfacing welding wire special for the mandrel for rolling the seamless steel tube according to claim 1, characterized in that: the weight of the flux core is 25-35% of the weight of the welding wire, and the diameter of the flux core welding wire is phi 3.2 mm.
3. The hardfacing wire for a mandrel bar for rolling a seamless steel pipe according to claim 1, wherein the outer-skin steel strip comprises the following components: 0.01-0.15% of C, 0.1-0.5% of Mn, 0.005-0.015% of Si, 0.005-0.010% of S, 0.005-0.015% of P, and the balance of iron and essential impurities.
4. The hardfacing wire for a mandrel bar for rolling a seamless steel pipe according to claim 3, wherein the outer-skin steel strip comprises the following components: 0.01-0.05 wt% of C, 0.1-0.3 wt% of Mn, 0.005-0.01 wt% of Si, 0.005-0.010 wt% of S, 0.005-0.015 wt% of P, and the balance of iron and essential impurities.
5. The hardfacing wire special for the mandrel for rolling a seamless steel tube according to any one of claims 1 to 4, characterized in that: 4.5 parts of fluorite, 0.1 part of zirconium dioxide, 1.0 part of capacitance magnesia and LaAlO30.1 part by weight of medium carbon ferromanganese 4.0 part by weight of high carbon ferromanganese 5.0 part by weight of chromium metal 1.0 part by weight of 75 ferrosilicon 0.5 part by weight of ferromolybdenum 1.5 part by weight of ferrovanadium 3.0 part by weight of tungsten powder 0.5 part by weight of iron powder 10 part by weight of iron powder.
6. The hardfacing wire special for the mandrel for rolling a seamless steel tube according to any one of claims 1 to 4, characterized in that: 4.5 parts of fluorite, 0.2 part of zirconium dioxide, 1.2 parts of capacitance magnesia and LaAlO30.2 part by weight of medium carbon ferromanganese 4.0 part by weight of high carbon ferromanganese 4.5 part by weight of chromium metal 1.2 part by weight of 75 ferrosilicon 0.7 part by weight of ferromolybdenum 1.5 part by weight of ferrovanadium 1.0 part by weight of tungsten powder 0.2 part by weight of iron powder 10.3 part by weight of iron powder.
7. The hardfacing wire special for the mandrel for rolling a seamless steel tube according to any one of claims 1 to 4, characterized in that: 4.5 parts of fluorite, 0.2 part of zirconium dioxide, 1.2 parts of capacitance magnesia and LaAlO30.3 part by weight, 4.0 parts by weight of medium carbon ferromanganese, 5.5 parts by weight of high carbon ferromanganese, 1.2 parts by weight of metal chromium, 1.0 part by weight of 75 ferrosilicon, 2.0 parts by weight of ferromolybdenum, 2.0 parts by weight of ferrovanadium, 0.5 part by weight of tungsten powder and 10 parts by weight of iron powder.
8. The hardfacing wire special for the mandrel for rolling a seamless steel tube according to any one of claims 1 to 4, characterized in that: 4.5 parts of fluorite, 0.3 part of zirconium dioxide, 0.7 part of capacitance magnesia and LaAlO30.3 weight portion, 5.0 weight portions of medium carbon ferromanganese, 4.5 weight portions of high carbon ferromanganese, 1.5 weight portions of metal chromium, 1.0 weight portion of 75 silicon iron, 2.5 weight portions of ferromolybdenum and 3.0 weight portions of ferrovanadiumThe weight portions of the tungsten powder, the tungsten powder and the iron powder are 0.5 weight portion and 12.2 weight portions.
9. The preparation method of the special hard-surface overlaying welding wire for the mandrel for rolling the seamless steel pipe as claimed in any one of claims 1 to 8 comprises the following steps:
uniformly mixing all components of the medicine core for later use;
secondly, the sheath is placed in a welding wire forming machine, the flux-cored mixture for standby is injected into a U-shaped sheath groove which is formed by transverse bending, then the sheath is rolled into a wire, and the wire is finely drawn to phi 3.2mm, thus obtaining the special hard-face surfacing welding wire for the mandrel for rolling the seamless steel tube.
10. A method for welding a mandrel bar for rolling a seamless steel tube, which comprises welding the mandrel bar for rolling a seamless steel tube with the hardfacing welding wire for the mandrel bar for rolling a seamless steel tube according to any one of claims 1 to 8, wherein the welding parameters are as follows: I400A, U26V, V30 m/h.
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| CN113770591B (en) * | 2021-10-13 | 2023-01-31 | 北京金威焊材有限公司 | Flux-cored wire for welding stainless steel used in high-temperature environment |
| CN115926501B (en) * | 2022-12-27 | 2023-08-22 | 广东省科学院中乌焊接研究所 | Method for improving corrosion resistance of super duplex stainless steel structural member manufactured by arc additive |
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| CN109249152A (en) | 2019-01-22 |
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