CN107127476B - A kind of special welding wire welded for martensitic stain less steel in continuous rolling unit - Google Patents
A kind of special welding wire welded for martensitic stain less steel in continuous rolling unit Download PDFInfo
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- CN107127476B CN107127476B CN201710292492.XA CN201710292492A CN107127476B CN 107127476 B CN107127476 B CN 107127476B CN 201710292492 A CN201710292492 A CN 201710292492A CN 107127476 B CN107127476 B CN 107127476B
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- welding
- continuous rolling
- welding wire
- stain less
- martensitic stain
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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
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major constituent
Abstract
The invention discloses a kind of special welding wire welded for martensitic stain less steel in continuous rolling unit, the welding wire composition and mass percent are as follows: 60~90wt.% of Ni；8~30wt.% of Cr；1~5wt.% of Mn；0~5wt.% of Fe；0~0.5wt.% of Si；0~0.1wt.% of C.The present invention controls the distribution of Ni, Cr, Mn element in welding pool by the rational Design on Plane of component of weld wire, promotes the formation of austenite in weld metal, inhibit the growth of martensite, increase martensite wide-angle misorientation ratio, finally improves welding seam toughness, meet rolling requirements.The present invention can be realized the continuous rolling of martensitic stain less steel, to martensitic stain less steel production cost is reduced, the industry development of martensitic stain less steel continuous rolling be promoted to be of great significance.
Description
Technical field
The invention belongs to continuous rolling welding wire fields, more particularly, to one kind for geneva in continuous rolling unit
The stainless steel welded special welding wire of body.
Background technique
Continuous rolling improves operating efficiency for tradition rolling, reduces impact of the rolled piece to milling train, reduces
The consumption of process equipment accident and standby redundancy, and workpiece measurement precision is improved, thus be widely used in the production of strip
In.But the weld seam between plate is rolled when continuous rolling must keep enough obdurabilities, otherwise be easy to cause the disconnected band of rolling, shadow
Production efficiency and lumber recovery are rung, and brings huge economic losses.
Martensitic stain less steel corrosion resistance is moderate and cheap, has in fields such as nuclear industry, Medical Devices, chemical machineries
It is widely applied, based on Fe-Cr-C ternary system, cooling velocity even if in still air is enough homoatomic occurs different for it
Allosteric transformation easily forms the melting area of welding seam and heat affected zone organization based on martensite in welding.This tissue signature makes
Martensitic stain less steel welding seam toughness wretched insufficiency is obtained, rolling requirements is unable to satisfy, seriously limits the production of martensitic stain less steel
Efficiency.Therefore, martensitic stain less steel welding seam toughness how is improved, so that it is met continuous rolling requirement, is that this field is urgently to be resolved
The problem of.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides one kind for horse in continuous rolling unit
The stainless steel welded special welding wire of family name's body controls Ni, Cr, Mn member in welding pool by the rational Design on Plane of component of weld wire
The distribution of element promotes the formation of austenite in weld metal, inhibits the growth of martensite, improves welding seam toughness, meets rolling and wants
It asks, has many advantages, such as strong applicability, it is easy to use.
To achieve the above object, the invention proposes it is a kind of in continuous rolling unit martensitic stain less steel weld it is special
With welding wire, the component and mass percent of the welding wire are as follows: 60~90wt.% of Ni；8~30wt.% of Cr；1~5wt.% of Mn；
0~5wt.% of Fe；0~0.5wt.% of Si；0~0.1wt.% of C.
As it is further preferred that the component and mass percent of the welding wire are preferred are as follows: Ni 73wt.%；Cr
22wt.%；Mn 3.5wt.%；Fe 1.3wt.%；Si 0.15wt.%；C 0.05wt.%.
As it is further preferred that the welding wire is used for the continuous rolling machine of the high martensitic stain less steel of crack sensitivity
Group.
As it is further preferred that the high martensitic stain less steel of the crack sensitivity is preferably 2Cr13.
As it is further preferred that continuous rolling of the welding wire for the difficult wlding material of the hard crisp martensitic structure of easily formation
Unit.
As it is further preferred that the easy difficult wlding material for forming hard crisp martensitic structure is high-carbon steel or high silicon steel.
The present invention is based on welding ablation principle, alloy phase diagram and weld seam solidification and crystallization theories to rationalize to component of weld wire
Design reaches the distribution of Ni, Cr, Mn element in control welding pool, expands the corresponding austenite phase field of weld seam alloy system, increases
The stability of austenite is increased temperature, and inhibits transformation of austenite to martensite in subsequent cooling process, promotes residual austenite
The formation of body.Retained austenite coordinates stress distribution in deformation process, and then improves welding seam toughness, realizes martensitic stain less steel
The purpose of weld seam continuous rolling.The present invention is to promote the key technology of the strip continuous rolling production of martensitic stain less steel, to subtracting
Few broken belt rate, raising lumber recovery, attenuating production cost are significant.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, mainly have below
Technological merit:
1. welding wire of the invention matches well with martensitic stain less steel matrix composition, it is ensured that the stability of welding procedure；
Welding seam toughness is excellent, with stainless steel welded standard first-order weld require and rolling demand, welding wire of the present invention use so that
Broken belt rate in the production of strip continuous rolling unit is less than 2 ‰.
2. welding wire of the invention cannot be only used for the continuous rolling unit of the high martensitic stain less steel of crack sensitivity, may be used also
The continuous rolling unit of the difficult wlding material of hard crisp martensitic structure is easily formed for high-carbon steel, high silicon steel etc..
It is filled out 3. welding wire of the invention can be used for the various needs such as laser welding, laser-arc hybrid welding in industry and arc welding
Fill the welding procedure of wlding；Solder wire formula of the invention can be also used for the system of the packing materials such as welding rod, solder, alloy powder
It is standby.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below each other it
Between do not constitute conflict and can be combined with each other.
Component of weld wire is the effective means for improving seam organization and mechanical property, can be by adding by system research discovery
The alloying action for being welded with material expands the corresponding austenite phase field of weld seam alloy system, inhibits martensite transfor mation, makes weld seam in room
Still retain a large amount of austenite structures when warm, so as to improve martensitic stain less steel welding seam toughness, realizes its continuous rolling.It is basic herein
On, the present invention proposes a kind of special welding wire welded for martensitic stain less steel in continuous rolling unit, and the present invention configures welding wire
When so that it is kept certain compatible on ingredient with Fe-Cr-C system martensitic stain less steel base material by the way that Cr is added；It is difficult to understand by being added
Family name's body formation element Ni and Mn is in the upper formation for promoting austenite to greatest extent；It is filled simultaneously when carrying out soldering wire alloy element proportion
Divide the matching for considering itself and base material composition and welding seam toughness.
Specifically, a kind of special welding wire welded for martensitic stain less steel in continuous rolling unit provided by the invention,
Using the welding wire, cooperate welding condition appropriate, the martensitic stain less steel weld seam of good-toughness can be obtained, realize its company
Application in continuous rolling unit, wherein the component and mass percent of the welding wire are 60~90wt.% of Ni；Cr 8~
30wt.%；1~5wt.% of Mn；0~5wt.% of Fe；0~0.5wt.% of Si；0~0.1wt.% of C, the welding wire can be used for adopting
Need to fill the continuous rolling unit of the welding procedure of wlding with laser welding, laser-arc hybrid welding in industry, arc welding etc.
In.Preferred welding wire composition and mass percent are as follows: Ni 73wt.%；Cr 22wt.%；Mn 3.5wt.%；Fe
1.3wt.%；Si 0.15wt.%；C 0.05wt.%, it is stainless which can be used in the high martensite of crack sensitivity
The continuous rolling unit of steel, it can also be used to easily form the continuous of the difficult wlding material such as high-carbon steel, high silicon steel of hard crisp martensitic structure
Unit is rolled, and the welding wire of the component makes welding seam toughness excellent, it can be achieved that the continuous effective of martensitic stain less steel weld seam is rolled
System.
Wherein, Ni is the element for forming and stablizing austenite strongly, expanding austenite phase field.Inventor sends out after study
It is existing, using a small amount of retained austenite is formed after conventional austenitic stainless steel welding wire or two phase stainless steel welding wire, although welding seam toughness
It increases, but it is still easy to happen fracture during the rolling process.In conjunction with above-mentioned discovery, and in view of Ni element can be effective
Martensite transfor mation is prevented, makes in weld seam to improve welding seam toughness, present inventor is not by there are austenite or retained austenite
Disconnected research obtains the welding wire that Ni constituent content is 60~90wt.%, and welding seam toughness improves significant under the content, and it is rolled
Performance processed significantly improves.
Cr element is one of Fe-Cr-C system martensitic stain less steel main alloy element, is that stainless steel keeps corrosion proof base
This element.For the compatibility of component of weld wire and base material, inventor has found that Cr constituent content 8~30wt.% it
Between when, welding wire and base material have good fusion, and welding process is stablized.
Mn is weaker austenite former, but has the function of strong stable austenite.However, sending out after study
Now when its content is lower than 1wt.%, residual austenite content raising is not significant, and readily facilitates when its content is higher than 5wt.%
σ phase is precipitated and reduces welding seam toughness.Therefore, Mn content chooses 1~5wt.% when preparing welding wire.
Fe is the main alloying element of Fe-Cr-C system martensitic stain less steel.In the base for the rolling performance for guaranteeing welding seam toughness
On plinth, the addition of Fe element can further strengthen the fusion of welding wire and base material in welding wire, improve welding process stability.
Si and C is impurity element when welding wire is prepared, and be should try to control in relatively low level.
Below by several embodiments, the invention will be further described, but the present invention is not limited in the embodiment
Content.
Embodiment 1:
Welding wire used by the present embodiment is existing routine ER316L austenitic stainless steel welding wire.
Material to be welded is 2Cr13 martensitic stainless steel, with a thickness of 4.0mm, material composition are as follows: C0.19.wt.%；Cr
13.29.wt.%；Si 0.55.wt.%；Mn 0.35.wt.%；Fe 85.62.wt.%.
Used welding procedure is laser-arc hybrid welding in industry.Welding condition are as follows: laser power 4.0kW, electric arc
Electric current 86A, arc voltage 18.0V, laser focal 215mm, defocusing amount -2mm, speed of welding 2.5m/min, optical fiber spacing 3mm,
Dry extension of electrode 11.0mm, welding gun inclination angle are 50 degree.Welding process is stablized, the defects of flawless, pore-free can be obtained it is excellent
Matter weld seam, but weld seam residual austenite content is few, is broken in Erichsen test along weld seam, through 40wt.% drafts cold rolling
There is obvious penetrating crack in weld seam afterwards.
Embodiment 2:
Component of weld wire used by the present embodiment are as follows: Ni 73wt.%；Cr 22wt.%；Mn 3.5wt.%；Fe
1.3wt.%；Si 0.15wt.%；C 0.05wt.%.
Material to be welded and embodiment 1 are consistent.
Used welding procedure is laser-arc hybrid welding in industry.Welding condition are as follows: laser power 4.0kW, electric arc
Electric current 86A, arc voltage 18.0V, laser focal 215mm, defocusing amount -2mm, speed of welding 2.5m/min, optical fiber spacing 3mm,
Dry extension of electrode 11.0mm, welding gun inclination angle are 50 degree.Welding process is stablized, the defects of flawless, pore-free can be obtained it is excellent
Matter weld seam can form sufficiently ductile austenite structure inside weld seam, occur that it in Erichsen test perpendicular to weld seam
Fracture (is broken) along base material, and the rolling for being 60wt.% by drafts.
Embodiment 3:
Component of weld wire used by the present embodiment are as follows: Ni 60wt.%；Cr 30wt.%；Mn 5wt.%；
Fe4.8wt.%；Si 0.15wt.%；C 0.05wt.%.
Material to be welded and embodiment 1 are consistent.
Used welding procedure is optical-fiber laser filler wire welding.Technological parameter is laser power 5.0kW, laser focal
215mm, defocusing amount -2mm (laser spot is below specimen surface), speed of welding 2.5m/min, optical fiber spacing (laser facula and
Distance of the welding wire tip in specimen surface) -2mm, wire feed inclination angle is 30 degree.Welding process is stablized, and can obtain flawless, without gas
The quality weld of the defects of hole can form sufficiently ductile austenite structure inside weld seam, it is made to hang down in Erichsen test
Directly occur fracture (being broken along base material) in weld seam, and the rolling for being 50wt.% by drafts.
Embodiment 4:
Component of weld wire used by the present embodiment are as follows: Ni 90wt.%；Cr 8wt.%；Mn 1wt.%；Fe
0.8wt.%；Si 0.15wt.%；C 0.05wt.%.
Material to be welded and embodiment 1 are consistent.
Used welding procedure is arc welding.Welding condition are as follows: arc current 144A, arc voltage 21.0V,
Speed of welding 0.8m/min, dry extension of electrode 11mm, welding gun inclination angle are 85 degree.Welding process is stablized, and flawless, nothing can be obtained
The quality weld of the defects of stomata can form sufficiently ductile austenite structure inside weld seam, make it in Erichsen test
Occur fracture (being broken along base material) perpendicular to weld seam, and the rolling for being 45wt.% by drafts.
Embodiment 5:
Component of weld wire used by the present embodiment are as follows: Ni 85wt.%；Cr 10wt.%；Mn 3.5wt.%；Fe
1.3wt.%；Si 0.15wt.%；C 0.05wt.%.
Material to be welded is 3Cr13 martensitic stainless steel, with a thickness of 4.0mm, material composition are as follows: C 0.30wt.%；Cr
13.15wt.%；Si 0.55wt.%；Mn 0.55wt.%；Fe 85.50wt.%.
Used welding procedure is laser-arc hybrid welding in industry.Welding condition are as follows: laser power 4.0kW, electric arc
Electric current 86A, arc voltage 18.0V, laser focal 215mm, defocusing amount -2mm, speed of welding 2.5m/min, optical fiber spacing 3mm,
Dry extension of electrode 11.0mm, welding gun inclination angle are 50 degree.Welding process is stablized, the defects of flawless, pore-free can be obtained it is excellent
Matter weld seam can form sufficiently ductile austenite structure inside weld seam, occur that it in Erichsen test perpendicular to weld seam
Fracture (is broken) along base material, and the rolling for being 50wt.% by drafts.
Embodiment 6:
Component of weld wire used by the present embodiment are as follows: Ni 85wt.%；Cr 10wt.%；Mn 4.4wt.%；Fe
0wt.%；Si 0.5wt.%；C 0.1wt.%.
Material to be welded is T8 high-carbon steel, with a thickness of 4.5mm, material composition are as follows: C 0.80wt.%；Cr 0.15wt.%；Ni
0.10wt.%；Cu 0.15wt.%；Fe 98.80wt.%.
Used welding procedure is optical-fiber laser filler wire welding.Technological parameter is laser power 5.0kW, laser focal
215mm, defocusing amount -2mm (laser spot is below specimen surface), speed of welding 2.0m/min, optical fiber spacing (laser facula and
Distance of the welding wire tip in specimen surface) -2mm, wire feed inclination angle is 30 degree.Welding process is stablized, and can obtain flawless, without gas
The quality weld of the defects of hole can form sufficiently ductile austenite structure inside weld seam, it is made to hang down in Erichsen test
Directly occur fracture (being broken along base material) in weld seam, and the rolling for being 40wt.% by drafts.
Embodiment 7:
Component of weld wire used by the present embodiment are as follows: Ni 70wt.%；Cr 24wt.%；Mn 1wt.%；Fe 5wt.%；
Si 0wt.%；C 0wt.%.
Material to be welded is high silicon steel, with a thickness of 4.0mm, material composition are as follows: Si 3.5wt.%；Cr 1.7wt.%；Mn
0.25wt.%；Al 0.16wt.%；C 0.008wt.%；Fe 94.382wt.%.
Used welding procedure is arc welding.Welding condition are as follows: arc current 144A, arc voltage 21.0V,
Speed of welding 0.8m/min, dry extension of electrode 11mm, welding gun inclination angle are 85 degree.Welding process is stablized, and flawless, nothing can be obtained
The quality weld of the defects of stomata can form sufficiently ductile austenite structure inside weld seam, make it in Erichsen test
Occur fracture (being broken along base material) perpendicular to weld seam, and the rolling for being 40wt.% by drafts.
Above embodiments can obtain the quality weld of the metallurgical imperfections such as flawless and stomata, and hang down in Erichsen test
Fracture (being broken along base material) directly occurs in weld seam, the rolling of 40wt.% is at least by drafts.
The present invention can control the distribution of Ni, Cr, Mn element in welding pool by the rational Design on Plane of component of weld wire,
The formation for promoting austenite in weld metal inhibits the growth of martensite, increases martensite wide-angle misorientation ratio, finally mentions
High welding seam toughness, meets rolling requirements.The present invention can be realized the continuous rolling of martensitic stain less steel, and to reducing, martensite is stainless
Steel production cost promotes the industry development of martensitic stain less steel continuous rolling to be of great significance.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of special welding wire welded for martensitic stain less steel in continuous rolling unit, passes through the rationalization of component of weld wire
The distribution of Ni, Cr, Mn element, promotes the formation of austenite in weld metal, inhibits martensite in design control welding pool
Growth increases martensite wide-angle misorientation ratio, meets rolling requirements to improve welding seam toughness, which is characterized in that the welding wire
Component and mass percent are as follows: 60~90wt.% of Ni；8~30wt.% of Cr；1~5wt.% of Mn；0~5wt.% of Fe；
0~0.5wt.% of Si；0~0.1wt.% of C can when the welding wire is welded for martensitic stain less steel in continuous rolling unit
The quality weld for obtaining flawless and stomata metallurgical imperfection, is broken in Erichsen test perpendicular to weld seam, and can pass through
Drafts is at least the rolling of 40wt.%, so that the broken belt rate in the production of strip continuous rolling unit is less than 2 ‰.
2. the special welding wire for martensitic stain less steel welding in continuous rolling unit, feature exist as described in claim 1
In the component and mass percent of the welding wire are preferred are as follows: Ni 73wt.%；Cr 22wt.%；Mn 3.5wt.%；Fe
1.3wt.%；Si 0.15wt.%；C 0.05wt.%.
3. the special welding wire for martensitic stain less steel welding in continuous rolling unit as claimed in claim 1 or 2, feature
It is, the continuous rolling unit of the welding wire martensitic stain less steel high for crack sensitivity.
4. the special welding wire for martensitic stain less steel welding in continuous rolling unit, feature exist as claimed in claim 3
In the high martensitic stain less steel of the crack sensitivity is preferably 2Cr13.
5. the special welding wire for martensitic stain less steel welding in continuous rolling unit, feature exist as claimed in claim 4
In the continuous rolling unit of difficult wlding material of the welding wire for easily forming hard crisp martensitic structure.
6. the special welding wire for martensitic stain less steel welding in continuous rolling unit, feature exist as claimed in claim 5
In the easy difficult wlding material for forming hard crisp martensitic structure is high-carbon steel or high silicon steel.
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| CN110587135B (en) * | 2019-08-14 | 2021-09-24 | 上海宝钢阿赛洛激光拼焊有限公司 | Welding method for preventing laser tailor-welded blank from stamping and cracking |
| CN114054954B (en) * | 2021-11-18 | 2024-02-20 | 山西太钢不锈钢股份有限公司 | Cold continuous rolling unit 410 martensitic stainless steel welding and heat treatment method |
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| JPH04135089A (en) * | 1990-09-25 | 1992-05-08 | Aisin Takaoka Ltd | Welding wire |
| CN101249591A (en) * | 2007-10-31 | 2008-08-27 | 哈尔滨电机厂有限责任公司 | Nickel-based welding wire and preparation technique thereof |
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| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN102794538A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Welding method for improving low-temperature impact toughness of low carbon martensite stainless steel welded joint |
| CN106493484A (en) * | 2015-09-07 | 2017-03-15 | 吴国林 | A kind of two phase stainless steel as welding material |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04135089A (en) * | 1990-09-25 | 1992-05-08 | Aisin Takaoka Ltd | Welding wire |
| CN101269447A (en) * | 2007-03-23 | 2008-09-24 | 中国科学院金属研究所 | Heat-proof stainless steel gas protection welding wire of martensite |
| CN101249591A (en) * | 2007-10-31 | 2008-08-27 | 哈尔滨电机厂有限责任公司 | Nickel-based welding wire and preparation technique thereof |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN102794538A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Welding method for improving low-temperature impact toughness of low carbon martensite stainless steel welded joint |
| CN106493484A (en) * | 2015-09-07 | 2017-03-15 | 吴国林 | A kind of two phase stainless steel as welding material |
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