CN101633085B - Stainless steel welding wire and technology for welding same - Google Patents
Stainless steel welding wire and technology for welding same Download PDFInfo
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- CN101633085B CN101633085B CN2008100408975A CN200810040897A CN101633085B CN 101633085 B CN101633085 B CN 101633085B CN 2008100408975 A CN2008100408975 A CN 2008100408975A CN 200810040897 A CN200810040897 A CN 200810040897A CN 101633085 B CN101633085 B CN 101633085B
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Abstract
The invention discloses a stainless steel welding wire and technology for welding the same. The stainless steel welding wire comprises the following chemical components in percentage by weight: 0 to 0.03 percent of C, 0.4 to 1.2 percent of Mn, 0.5 to 1.0 percent of Si, 17 to 18 percent of Cr, 0.2 to 0.4 percent of Ti, 5.5 to 6.5 percent of Ni, 0 to 0.015 percent of S, 0 to 0.02 percent of P and the balance of Fe and other inevitable impurities. The technology for welding the welding wire comprises that: the welding technology of gas metal arc welding is used under the condition of heat input of between 4 and 8 KJ/cm, namely the welding current is between 210 and 230A, the welding voltage is between 24 and 26V, a welding speed is between 400 and 600mm/min, and an interpass temperature is less than 100 DEG C. The stainless steel welding wire can effectively resist the corrosion of galvanic couples, not only has higher tensile strength, but also has higher impact ductility, can be widely applied to the welding of martensite stainless steel and dual-phase stainless steel (martensite + a ferrite structure), does not need carrying out weld preheating and postweld heat treatment, reduces production and using cost and ensures that welding lines do not generate fissures.
Description
Technical field
The invention belongs to material processing field, the welding procedure that relates in particular to a kind of welding material and use this welding material.
Background technology
In the welding of martensitic stainless steel and two phase stainless steel (martensite+ferritic structure), select for use the austenitic type welding material to carry out above-mentioned stainless welding at present usually.Because the difference of packing material and mother metal composition, this class welding point can be corroded owing to the electrode potential that both bring is different usually.As adopt the ER240 among ASME (ASME) SFA (wlding standard)-5.9, the welding material of two kinds of models of ER630, because the galvanic corrosion that the difference of packing material and mother metal composition system easily causes.
Summary of the invention
The purpose of this invention is to provide a kind of stainless steel welding stick and welding procedure thereof, this stainless steel welding stick adds at martensitic stain less steel or martensite that use in the ferritic stainless steel can effectively anti-galvanic corrosion, not only have advantages of higher tensile strength, and have higher impact flexibility.
Technical scheme of the present invention: a kind of stainless steel welding stick, the chemical component weight per distribution ratio is: C 0～0.03%, Mn 0.4～1.2%, Si 0.5～1.0%, and Cr 17～18%, and Ti 0.2～0.4%, Ni 5.5～6.5%, S 0～0.015%, and P 0～0.02%, and surplus is Fe and other unavoidable impurities.
The invention still further relates to the welding procedure of using above-mentioned stainless steel welding stick, concrete steps are as follows: under heat input 4～8KJ/cm condition, use the welding procedure of gas metal-arc welding, promptly welding current is 210～230A; Weldingvoltage is at 24～26V, and speed of welding is 400～600mm/min, and interlayer temperature is less than 100 ℃.
The organizational groups of welding material of the present invention becomes low-carbon martensite+a little ferrite tissue.
C is one of metal strengthening element effective element, and in order to reach the superhigh intensity grade, a certain amount of C element is absolutely necessary, and simultaneously in order to form the effective particle core of the heterogeneous forming core of Ti (C, N), also needs a certain amount of C content.But C content can not be too many, and superfluous C is solid-solubilized in the martensitic matrix and will seriously reduces the toughness of deposited metal.
For guaranteeing that weld metal has certain corrosion resistance and control martensite and ferritic phase ratio and adds a certain amount of Cr element; Too high or mistake is hanged down all can not reach good obdurability coupling.
Ni is an austenite former, is one of low-temperature flexibility element that improves on metal.Therefore in order to guarantee that its deposited metal has certain plasticity and toughness, need to add the Ni element of proper content in the composition system; It is not remarkable to the tough property improvement of deposited metal to cross low Ni constituent content, and the too high cost that then not only can improve welding wire also can form retained austenite in deposited metal, unfavorable deposited metal toughness properties.
Studies show that refined crystalline strengthening is unique to intensity and all contributive schedule of reinforcement of toughness.In order further to improve deposited metal toughness, can make the further refinement of the good low-carbon martensite of toughness, the present invention will add certain Ti for this reason, utilize the Ti (C, N) of energy stable existence in the liquid phase molten bath, trigger the heterogeneous forming core of multiple spot, thus the primary solidification structure of refinement deposited metal.Ti content is low excessively, and the heterogeneous forming core core of formation very little.Do not have the effect of crystal grain thinning; Because Ti is very active element, very easily oxidation, Ti content is too much, will form the difficult slag inclusion of removing in smelting process easily, influences the quality of strand and the recovery rate of element.
Suitable Mn also is the assurance that deposited metal has certain intensity, and simultaneously Mn also has the effect of desulfurization and deoxidation in the process of molten bath.
An amount of Si helps the flowability in molten bath stage molten bath to improve on the one hand, and also help to combine formation slag inclusion thing on the other hand and float with oxygen, thus the content of oxygen in the reduction molten bath.
In addition, S, P content need strict control.
The present invention makes it compared with prior art owing to adopted above technical scheme, has the following advantages and good effect:
1) deposited metal in the welding material of the present invention not only has the tensile strength of superelevation, and it still has good plasticity and toughness, significantly is better than the performance with the class standard welding material.
2) solder wire material composition system of the present invention can be applied in the welding of steel grades such as martensitic stain less steel and martensite+ferrite diphasic stainless steel widely, substitute the austenite welding material that adopts usually, in the service life of having avoided original galvanic corrosion that very easily takes place and having reduced joint, reduced the production use cost.
3) welding procedure of the present invention need not be carried out weld preheating and post weld heat treatment, can guarantee that weld seam can not crack.
The specific embodiment
The component of weld wire contrast of the ER240 of the present invention and prior art, two kinds of models of ER630 is as shown in table 1.
Table 1
The component of weld wire mechanical property contrast of the ER240 of the present invention and prior art, two kinds of models of ER630 is as shown in table 2.
Table 2
Prior art can be brought very big difficulty to welding along with the raising of weld strength grade, need carry out preheating and post weld heat treatment usually and avoid crackle to produce.
A kind of welding procedure of stainless steel welding material is proposed based on welding wire of the present invention; the instant heating input is under 4～8KJ/cm condition; use the welding procedure of gas metal-arc welding; be that welding current is 210-230A; weldingvoltage is at 24-26V; speed of welding is 400-600mm/min, and interlayer temperature is less than 100 ℃.Without weld preheating and post weld heat treatment, can guarantee that weld seam can not crack.
According to composition range of the present invention, provide the embodiment of following five stainless steel welding stick compositions, see Table 4, the diameter of welding wire is 1.2mm.The deposited metal mechanical property that adopts GMAW (gas metal-arc welding) method to obtain sees Table 5.
Table 4
Table 5
Be noted that above enumerate only for several specific embodiments of the present invention, obviously the invention is not restricted to above embodiment, many similar variations are arranged thereupon.If those skilled in the art all should belong to protection scope of the present invention from all distortion that content disclosed by the invention directly derives or associates.
Claims (2)
1. stainless steel welding stick, it is characterized in that the chemical component weight per distribution ratio is: C 0～0.03%, Mn0.4～1.2%, Si 0.5～1.0%, and Cr 17～18%, and Ti 0.2～0.4%, Ni 5.5～6.5%, S 0～0.015%, and P 0～0.02%, and surplus is Fe and other unavoidable impurities.
2. the welding procedure of stainless steel welding stick as claimed in claim 1; it is characterized in that: under heat input 4～8KJ/cm condition; use the welding procedure of gas metal-arc welding; welding current is 210～230A; weldingvoltage is at 24～26V; speed of welding is 400～600mm/min, and interlayer temperature is less than 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100408975A CN101633085B (en) | 2008-07-24 | 2008-07-24 | Stainless steel welding wire and technology for welding same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100408975A CN101633085B (en) | 2008-07-24 | 2008-07-24 | Stainless steel welding wire and technology for welding same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101633085A CN101633085A (en) | 2010-01-27 |
| CN101633085B true CN101633085B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100408975A Active CN101633085B (en) | 2008-07-24 | 2008-07-24 | Stainless steel welding wire and technology for welding same |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296245B (en) * | 2010-06-23 | 2016-03-30 | 宝山钢铁股份有限公司 | A kind of high-strength high-corrosion-resistance wear-resisting sleeve steel and manufacture method thereof |
| CN103586567A (en) * | 2013-11-14 | 2014-02-19 | 上海沈达空调配件厂（普通合伙） | Method for fusion covering of shaped metal clad plate by adoption of gas shield welding manner |
| CN104227265B (en) * | 2014-07-25 | 2017-02-15 | 洛阳双瑞特种合金材料有限公司 | Ultrahigh-intensity all-austenite stainless steel welding wire |
| CN104759788B (en) * | 2015-03-09 | 2018-04-10 | 西安理工大学 | 0Cr13Ni5Mo steel metal flux-cored wires and preparation method thereof |
| CN104923967B (en) * | 2015-06-25 | 2017-06-23 | 江苏省沙钢钢铁研究院有限公司 | The high-strength and high ductility gas shield welding wire and weld metal of preheating can be exempted |
| CN105108376A (en) * | 2015-08-13 | 2015-12-02 | 江苏新航合金科技有限公司 | Nickel alloy high-temperature-resistant welding wire |
| CN111250897A (en) * | 2018-11-30 | 2020-06-09 | 泰州市淳强不锈钢有限公司 | High-strength stainless steel welding material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119765A (en) * | 1976-04-27 | 1978-10-10 | Crucible Inc. | Welded ferritic stainless steel articles |
| US4141762A (en) * | 1976-05-15 | 1979-02-27 | Nippon Steel Corporation | Two-phase stainless steel |
| JP2000256809A (en) * | 1999-03-10 | 2000-09-19 | Daido Steel Co Ltd | Welding wire and welding method using same |
| CN1314228A (en) * | 2000-03-20 | 2001-09-26 | 现代综合金属株式会社 | Solder core type welding wire with good anti-fragmentation performance for welding ferrite stainless steel |
-
2008
- 2008-07-24 CN CN2008100408975A patent/CN101633085B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119765A (en) * | 1976-04-27 | 1978-10-10 | Crucible Inc. | Welded ferritic stainless steel articles |
| US4141762A (en) * | 1976-05-15 | 1979-02-27 | Nippon Steel Corporation | Two-phase stainless steel |
| JP2000256809A (en) * | 1999-03-10 | 2000-09-19 | Daido Steel Co Ltd | Welding wire and welding method using same |
| CN1314228A (en) * | 2000-03-20 | 2001-09-26 | 现代综合金属株式会社 | Solder core type welding wire with good anti-fragmentation performance for welding ferrite stainless steel |
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| CN101633085A (en) | 2010-01-27 |
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