CN100469513C - High-strength gas-defended welding wire material - Google Patents
High-strength gas-defended welding wire material Download PDFInfo
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- CN100469513C CN100469513C CNB2007101216380A CN200710121638A CN100469513C CN 100469513 C CN100469513 C CN 100469513C CN B2007101216380 A CNB2007101216380 A CN B2007101216380A CN 200710121638 A CN200710121638 A CN 200710121638A CN 100469513 C CN100469513 C CN 100469513C
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Abstract
The invention belongs to the full position automatic welding material making field, in particular to a high strength gas protecting welding wire of synthesis mechanics good function in the welding line by adopting the rich argon gas protecting welding. The specific ingredient weight percent of the welding wire is that C is less than 0.05 percent, Si is ranged from 0.1 percent to 0.8 percent, Mn is ranged from 0.5 percent to 2.0 percent, S is less than 0.01 percent, P is less than 0.015percent, Ni is ranged from 0.5 percent to 2.0 percent, Cr is ranged from 0.05 percent to 0.50 percent , Mo is ranged from 0.1 percent to 0.5 percent, Cu is less than 0.3 percent, Ti is ranged from 0.01 percent to 0.25 percent, Re 0.05 is ranged from percent to 0.5 percent, B is ranged from 0.001 percent to 0.030 percent and remained iron. Compared with the prior art, the invention welding wire material has fine synthesis mechanics function of reasonable, simple, economic ingredient design of the welding wire material, high strength and low temperature toughness of the welding line smelt apply metal. The invention is characterized in that the wide applicable range of CO2 content in the gas is protected and the full position automatic welding has good manufacturability.
Description
Technical field
The invention belongs to all position automatic welding and connect the manufacturing field of material.Particularly after adopting argon-rich gas shielded welding, the high-strength gas protecting welding wire material that the commissure comprehensive mechanical property is good.
Background technology
In the prior art, be used in the gas shield welding wire material of X80 pipeline steel, its comprehensive mechanics is undesirable and limited the extensive use of this steel.Publication (application number: 01128326.2) introduced a kind of ' microtitanium-boron high-toughness gas protective welding stick ' for example; the application of this gas shield welding wire is to adopt Ar+20%CO2 gas to protect welding; though the weld seam after the welding has good low-temperature toughness; but the deposited metal intensity of welding place can not satisfy the service condition of X80 steel, only uses the solder wire material at X70 intensity rank steel at present.Number of patent application 89105436.7 has also been introduced a kind of ' welding wire ' patent in addition; this solder wire material is to adopt C02 gas to protect welding; though the deposited metal tensile strength of welding place can reach 800MPa, low-temperature impact toughness is really very low and can not satisfy the instructions for use of welding steel.Therefore, the comprehensive mechanical property of existing gas shield welding wire is all not ideal enough at present, and it shows as and is not that intensity is low, is exactly that low-temperature impact toughness is low.
Because the progress of metallurgical technology, therefore to the application of low-alloy high-tensile structural steel, especially intensity rank and the low-temperature flexibility level at steel all will have very high requirement.The gap of the low-temperature flexibility level of welding material and steel toughness levels is also bigger at present, and the performance of weld seam is restricting the performance of steel performance and the raising of integrality performance of the structure in the Welding Structure.Pipeline steel is development at present than one of steel grade very fast and that serviceability is had relatively high expectations.Have pipe line steel high strength and quite high low-temperature impact toughness level just may satisfy the requirement to serviceability of oil, tracheae line.Pipeline assembled in situ girth joint mainly adopts full position automatic gas shielded welding to connect.This welding method requires welding wire should possess high-strength, high-ductility and good welding procedure again, to satisfy the needs that all position automatic welding connect and obtained the high-performance welding point.In addition, weld seam also will possess performances such as the corrosion resistance that is complementary with steel pipe and anticorrosion stress-resistant.The welding material that needs research and development high strength and high tenacity, the comprehensive mechanical property that improves the weld(ing) deposit are the keys that improves structural steel military service performance.
Summary of the invention
It is reasonable in design, simple, economical to the objective of the invention is to propose a kind of composition; and have good comprehensive mechanical property and good welding procedure; the yield strength of deposited metal is in the 550MPa rank, and is applicable to the high-strength gas-defended welding wire material of the full position gas shield welding of X80 pipe line steel.
According to purpose of the present invention and deficiency of the prior art, the solution that we proposed is to adopt Ultra-low carbon, multi-element alloyed and microalloying, make solder wire material of the present invention keep still will having quite high low-temperature impact toughness and good welding procedure on the high-intensity basis.Adopt the microalloying design that this solder wire material is had under the technological situation of good all-position welding, can obtain molten place metallisation weld seam high-strength, high-ductility.Therefore the present invention proposes to have the concrete chemical component weight % of the high-strength gas-defended welding wire material of good welds technology and is: C＜0.05; Si 0.1-0.8%; Mn 0.5-2.0%; S＜0.01%; P＜0.015%; Ni 0.5-2.0%; Cr 0.05-0.50%; Mo 0.1-0.5%; Cu＜0.3%; Ti 0.01-0.25%; Re 0.05-0.5%; B 0.001-0.030%; Surplus is iron and other inevitable impurity.For realizing that the object of the invention also can obtain the gas shield welding wire material of high strength, high tenacity and good welds technology, the basic principle that we design solder wire material composition of the present invention is by high-strength, the high-ductility effect that improves the weld(ing) deposit and improves welding procedure and realize, promptly this solder wire material should make seam organization obtain refinement in alloying process and will form more acicular ferrite, and the surface tension and the state that improve the droplet transfer when welding.Also to suppress the generation of pro-eutectoid ferrite to this solder wire material when the alloying for this reason, and will change its form and size, but also to reduce pro-eutectoid ferrite as much as possible to adverse effect that this solder wire material caused to the pro-eutectoid ferrite that has generated.We also need to improve the acicular ferrite nucleating rate and enlarge the transition temperature interval in the basis that suppresses pro-eutectoid ferrite, thereby improve the transformation amount of weld seam acicular ferrite in continuous cooling process.Alloy element in solder wire material of the present invention in addition, formed small and dispersed oxide can also be as the forming core particle of acicular ferrite in welding process, can effectively reduce the free energy of acicular ferrite nucleating, thereby promote increasing in right amount of acicular ferrite.Therefore, the various elements that added in composition of the present invention all have important effect to the performance of this solder wire material.Introducing the effect of each element in solder wire material composition of the present invention in detail below:
Carbon has the important element that improves weld(ing) deposit intensity and reduce toughness of material, also is the important element that influences welding procedure, and the control carbon content is the basis of improving welding procedure and weld seam Strengthening and Toughening in suitable scope.Carbon is strong deoxidant element, the content of the carbon on metal drop surface, oxygen etc. and the scaling loss amount of different-alloy element when different carbon contents can change welding.The transition state and the surface tension of metal drop when when adopting Ultra-low carbon content, having improved welding effectively, thus appearance of weld improved.Carbon content also influences the hydrogen induced cracking sensitiveness and the stress corrosion performance of weld metal simultaneously.The too high meeting of carbon content all reduces toughness, crack resistance and the stress corrosion performance of weld metal.The strict restriction of welding wire of the present invention carbon content, in the composition carbon content be controlled at＜0.05%.
Silicon is deoxidant element, improves welding procedure, is the effect that improves weld(ing) deposit intensity and reduce welding seam toughness equally.Silicone content then deoxidation on the low side is insufficient in solder wire material, easily causes the weld seam too high oxygen level and influences the low-temperature impact toughness of weld seam.When adding an amount of element silicon in the solder wire material, can improve its welding procedure and improve weld metal intensity, but excessive silicone content can reduce the low-temperature flexibility of weld metal.Silicone content is 0.1-0.8% in the component of weld wire of the present invention.
Manganese is one of intensified element main in the component of weld wire of the present invention, and manganese is again deoxidant element simultaneously, and the oxide that forms in the process of combined deoxidation can promote the formation of acicular ferrite.Add an amount of manganese can improve weld metal in alloying process intensity and low-temperature impact toughness, can improve welding procedure.Manganese content is 0.5---2.0% in the component of weld wire of the present invention.
Nickel is one of important element in the component of weld wire of the present invention.Ni can improve the intensity and the low-temperature impact toughness of weld seam, is the main alloy element that improves low-temperature flexibility.But nickel content surpasses at 2.5% o'clock and causes the hot cracking tendency of commissure to increase easily.Nickel content is 0.5-2.5% in the component of weld wire of the present invention.
Chromium unit have the effect that improves weld(ing) deposit intensity, adds an amount of chromium element, has guaranteed that not only the commissure also can improve its intensity on high low-temperature flexibility basis.But excessive chromium can reduce the commissure low-temperature flexibility.Chromium content is 0.05-0.5% in the component of weld wire of the present invention.
Molybdenum is one of important element of strengthen welds alloy.The molybdenum of too high amount can cause the commissure embrittlement.Not only can significantly improve the high-strength of weld(ing) deposit but add an amount of molybdenum, but also not damage the threading property of low-temperature impact of weld seam.Molybdenum content is 0.1-1.0% in the component of weld wire of the present invention.
Titanium is the tuning element of the alloy of refinement weld grain and tissue, and adding an amount of titanium has the effect that improves welding wire welding manufacturability and seam organization and threading property of raising material at low temperature.Titanium in the microalloy composition can play a protective role to the oxidation of boron, not only can improve the transfer coefficient of boron, but also is beneficial to the beneficial effect of performance boron element.Can the butt welded seam low-temperature flexibility work the mischief but Ti content is too high.Ti content is 0.01-0.25% in the component of weld wire of the present invention.
Boron is to promote one of beneficial element that the weld(ing) deposit acicular ferrite forms.An amount of boron can improve the threading property of low temperature of weld seam in the weld seam.Boron element is by gathering the formation that suppresses pro-eutectoid ferrite partially on austenite grain boundary, thereby obtains the seam organization refinement and form more acicular ferrite.But add the threading property of low temperature that excessive boron also can reduce weld seam, and increase the tendency of hot tearing in addition.Boron content 0.001-0.030% in the component of weld wire of the present invention.，
Rare earth element can improve in the weld seam field trash size and forms such as sulfide, and can reduce the quantity of field trash and purify seam organization.Suitable ree content can improve the low-temperature impact toughness of weld seam and improve welding procedure.Component of weld wire middle rare earth constituent content 0.05-0.5% of the present invention.
Sulphur is the impurity element that is harmful to, and sulfur content is too high can to influence welding seam toughness and anti-stress corrosion performance etc., needs strict restriction sulfur content.Sulfur content is less than 0.010% in the component of weld wire of the present invention.
P and s is the same all to be the impurity element that is harmful to, and needs strict restriction phosphorus content.Phosphorus content is less than 0.015% in the component of weld wire of the present invention.
The present invention is on the alloy material basis of Ultra-low carbon content; by reasonable coupling to micro alloying elements such as boron, titanium, rare earth in the composition; make high-strength and high ductility gas shield welding wire material of the present invention obtain to have the result of use of outstanding low-temperature flexibility and welding procedure, this gas shield welding wire is applicable to the automatic and semi-automatic welding in the full position of Ar+5-50%CO2 protective gas.
Designed high strength, the high-ductility gas shielded welding wire preparation methods of the present invention is identical with the prior art for preparation method; prepare burden at first on request and high pure smelting; and then the processing technology of carrying out conventional forging, rolling and drawing welding wire or copper facing; the designing requirement size is pressed in final acquisition, and diameter is copper facing or the not copper facing gas shielded arc welding wire material of 1.2 millimeters of φ 0.8-φ.
Adopt the designed high-strength and high ductility gas shielded arc welding wire material of the present invention compared with prior art; composition with this solder wire material is reasonable in design, simple, economical; and the weld(ing) deposit after the welding has good comprehensive mechanical properties such as high intensity and low-temperature flexibility, but also possesses CO in the protective gas
2The content scope of application is wide, all position automatic welding connects the manufacturability good characteristics.
The specific embodiment
The embodiment of the invention is the high-strength gas-defended welding wire material composition range according to above-mentioned design, we have implemented 8 groups test altogether, for convenience with the contrast of prior art, we are divided into 4 groups with 8 groups of embodiment is the embodiment of prior art material for high-strength gas-defended welding wire material of the present invention and 4 groups.The preparation of the embodiment of the invention is the batching of carrying out according to test requirements document; adopt electric furnace to smelt; be that then 1050 ℃ are rolled; the drawing of welding wire or copper facing are the processing method of prior art, obtain the test contrast is of a size of 1.0 millimeters of φ with gas shield welding wire copper facing or not copper facing gas shielded arc welding wire material the most at last.Embodiment among the present invention adopts deposited metal soldering test (welding condition: gage of wire 1.2mm, welding current 220A, weldingvoltage 22V, heat input 14KJ/CM) and all position automatic welding connect test (welding condition: gage of wire 1.0mm, welding current 180--200A, weldingvoltage 19--22V, heat input 12--14KJ/CM).
The comparing result of the embodiment of the invention sees Table 1, table 2.Table 1 is the comparative result of the embodiment of the invention and prior art material composition weight %.Table 2 is the embodiment of the invention and prior art comprehensive mechanical performance comparative result.In contrast table, sequence number 1-4 is the embodiment of solder wire material of the present invention, and sequence number 5-8 is the embodiment of prior art material.
Table 1 is the comparative result of the embodiment of the invention and prior art material composition weight %
Table 2 is the embodiment of the invention and prior art comprehensive mechanical performance comparative result
Claims (1)
1, a kind of high-strength gas-defended welding wire material is characterized in that the concrete chemical component weight % of this solder wire material is: C＜0.05; Si 0.1-0.8%; Mn 0.5-2.0%; S＜0.01%; P＜0.015%; Ni 0.5-2.0%; Cr 0.05-0.50%; Mo 0.1-0.5%; Cu＜0.3%; Ti 0.01-0.25%; Re 0.05-0.5%; B 0.001-0.030%; Surplus is iron and other unavoidable impurities.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101216380A CN100469513C (en) | 2007-09-12 | 2007-09-12 | High-strength gas-defended welding wire material |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101216380A CN100469513C (en) | 2007-09-12 | 2007-09-12 | High-strength gas-defended welding wire material |
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| CN101116930A CN101116930A (en) | 2008-02-06 |
| CN100469513C true CN100469513C (en) | 2009-03-18 |
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Families Citing this family (21)
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| CN101549442B (en) * | 2008-03-31 | 2012-09-26 | 鞍钢股份有限公司 | High-toughness metal core gas shielded welding wire and manufacturing method thereof |
| CN101700600B (en) * | 2009-11-19 | 2011-08-03 | 河南第一火电建设公司 | Welding process method of novel Q460 steel for transmission tower |
| CN101905393B (en) * | 2010-08-26 | 2013-06-05 | 宜昌猴王焊丝有限公司 | Solid welding wire for high-toughness structural steel |
| CN101905392B (en) * | 2010-08-26 | 2012-04-25 | 宜昌猴王焊丝有限公司 | High-toughness low-alloy solid welding wire |
| CN101905391B (en) * | 2010-08-26 | 2013-01-09 | 宜昌猴王焊丝有限公司 | Submerged arc welding wire of high tensile pipeline steel |
| CN102218621B (en) * | 2011-05-26 | 2014-12-03 | 四川大西洋焊接材料股份有限公司 | Gas shielded welding wire used for X100 pipeline steel |
| CN102699566A (en) * | 2012-06-12 | 2012-10-03 | 钢铁研究总院 | Flux-cored wire for cargo oil tank of oil tanker |
| CN102794579A (en) * | 2012-08-25 | 2012-11-28 | 钢铁研究总院 | Anti-corrosion welding rod for constructing cargo-oil tanks of tank ships |
| CN103056550B (en) * | 2012-12-25 | 2016-03-09 | 中国船舶重工集团公司第七二五研究所 | A kind of welding wire for gas shielded welding of yield strength 900MPa rank |
| CN103331530B (en) * | 2013-06-14 | 2016-05-18 | 武汉钢铁(集团)公司 | A kind of RmHigh-ductility pure argon shield welding wire and the using method thereof of >=1100MPa |
| CN103317257B (en) * | 2013-06-20 | 2015-04-22 | 西安理工大学 | High-strength high-tenacity submerged arc welding wires for bainite steel |
| CN104175019A (en) * | 2014-08-22 | 2014-12-03 | 首钢总公司 | Gas shield solid welding wire for circumferential weld of X90 pipeline steel |
| CN104607819B (en) * | 2014-11-27 | 2017-10-31 | 宝山钢铁股份有限公司 | A kind of gas protecting welding wire and its manufacture method |
| CN106271195A (en) * | 2015-05-26 | 2017-01-04 | 江苏立新焊接材料有限公司 | X70, X80 big strain submarine pipeline welding gas protection wire |
| CN106514037A (en) * | 2015-09-14 | 2017-03-22 | 江苏立新焊接材料有限公司 | Gas-shielded wire for submarine pipeline welding and production method of gas-shielded wire |
| CN106514038A (en) * | 2015-09-14 | 2017-03-22 | 江苏立新焊接材料有限公司 | Gas shielded welding wire for submarine pipeline welding and production method of gas shielded welding wire |
| CN108015451B (en) * | 2017-12-01 | 2020-03-13 | 四川西冶新材料股份有限公司 | High-toughness gas-shielded welding wire for long-life weather-proof steel structure and preparation method thereof |
| CN108620766A (en) * | 2018-04-11 | 2018-10-09 | 丹阳市华龙特钢有限公司 | A kind of high-intensity and high-tenacity stainless steel arc welding flux cored wire and preparation method thereof |
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Assignee: Advanced Steel Technology Co., Ltd. Assignor: Central Iron & Steel Research Institute Contract record no.: 2011990000830 Denomination of invention: High-strength gas-defended welding wire material Granted publication date: 20090318 License type: Exclusive License Open date: 20080206 Record date: 20110829 |