CN102229029B - Flux-cored wire for austenitic stainless steel all-position welding - Google Patents
Flux-cored wire for austenitic stainless steel all-position welding Download PDFInfo
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Abstract
The invention relates to a flux-cored wire for austenitic stainless steel all-position welding, and the flux-cored wire is composed of a flux core and an external stainless steel belt, wherein, the flux core accounts for 22-24wt% of the flux-cored wire, and the flux core comprises the following components in percentage by weight: 20-23% of metal chromium powder, 7-8.5% of metal nickel powder, 2-4% of electrolytic manganese metal, 3-4% of aluminium powder, 0.5-1% of ferrotitanium, 32-34% of rutile, 1-2% of quartz, 2-4% of zircon sand, 4-6% of albite, 2-4% of potassium feldspar, 1-1.5% of cryolite, 1-1.5% of lithium carbonate, 0.1-0.5% of bismuth oxide and the balance of iron powder. The ratio of the albite to the potassium feldspar in the flux core is 1.2-2, the sum of the albite and the potassium feldspar is not more than 10wt% of the flux core, the external stainless steel belt is the austenitic stainless steel 304L, the carbon content is less than 0.025wt%, the diameter of the flux-cored wire is 0.9-1.2mm, and the flux-cored wire can be used for realizing the austenitic stainless steel all-position welding.
Description
Technical field
The invention belongs to the welding field of Materials Processing Engineering, especially, relate to the flux-cored wire that a kind of austenitic stainless steel all-position welding is used.
Background technology
Stainless steel is widely applied with its good decay resistance.According to stainless chemical composition, it can be divided into straight-chromiun stainless steel and chromium nickel stainless steel.According to stainless microscopic structure, it can be divided into martensitic stain less steel, ferritic stainless steel, austenitic stainless steel, two phase stainless steel and precipitation hardening stainless steel.Being most widely used of austenitic stainless steel wherein, the most typical austenitic stainless steel is the 18-8 stainless steel, namely contains the stainless steel of 18wt%Cr and 8wt%Ni, other austenitic stainless steels are by derivative on the 18-8 stainless steel base.
The all-position welding processing performance that austenitic stainless steel is good is one of important indicator of examination stainless flux-cored wire, require stainless flux-cored wire when the welding of the multiple position such as downhand welding, horizontal position welding, vertical position welding, all have good processing performance, as good in quality of weld seam molding, spatter is few etc.During the downhand position, for guaranteeing that quality of weld seam molding is good, spatter is little, requires welding arc soft, and blow force of arc is little.And when vertical position welding, horizontal position welding, action of gravitation makes the welding pool tenesmus, will reduce quality of weld seam molding, makes its mechanical properties decrease, drops for preventing the molten bath, require welding arc that certain power of blowing is arranged, and arc stiffness is high.Therefore guarantee vertical position welding or the horizontal position welding performance of stainless flux-cored wire, will sacrifice welding wire downhand welding manufacturability, cause the downhand welding increase of splashing.
The invention provides a kind of thin diameter flux-cored wire of using for the austenitic stainless steel all-position welding, addition and both ratios by albite and potassic feldspar in control stainless flux-cored wire medicine core, utilize albite to increase arc voltage, improve arc stiffness, utilize potassic feldspar to increase arc stability, by controlling both ratios, obtain being applicable to the stainless flux-cored wire of all-position welding.
Summary of the invention
The purpose of this invention is to provide a kind of thin diameter flux-cored wire of using for the austenitic stainless steel all-position welding, this welding wire has good all-position welding processing performance, is applicable to the welding of austenitic stainless steel.
To achieve these goals, the present invention is by the following technical solutions:
a kind of austenitic stainless steel all-position welding flux-cored wire, it is comprised of medicine core and external application stainless steel band, wherein, described medicine core accounts for 22.0～24.0% of welding wire gross weight, the percentage by weight that each component of medicine core accounts for described medicine core is: hafnium metal powfer: 20.0～23.0%, metal nickel powder: 7.0～8.5%, electrolytic manganese metal: 2.0～4.0%, aluminium powder: 3.0～4.0%, ferrotianium: 0.5～1.0%, rutile: 32.0～34.0%, quartzy: 1.0～2.0%, zircon sand: 2.0～4.0%, albite: 4.0～6.0%, potassic feldspar: 2.0～4.0%, ice crystal: 1.0～1.5%, lithium carbonate: 1.0～1.5%, bismuth oxide: 0.1～0.5%, all the other are iron powder.
Austenitic stainless steel all-position welding flux-cored wire as above, wherein, described external application stainless steel band is preferably austenic stainless steel belt 304L, and its phosphorus content is less than 0.025wt%.
Austenitic stainless steel all-position welding flux-cored wire as above, wherein, in described medicine core, the ratio of albite and potassic feldspar is preferably 1.2～2.0, and both addition sums are no more than 10% of medicine core weight.
Austenitic stainless steel all-position welding flux-cored wire as above, wherein, the diameter of described flux-cored wire is between 0.9mm～1.2mm.
The above-mentioned austenitic stainless steel all-position welding preparation method of flux-cored wire, step is as follows:
(1) according to the good medicine core of the recipe configuration powder of described medicine core, phosphorus content is rolled into U-shaped less than the austenic stainless steel belt of 0.025% (weight), add the medicine core powder that accounts for this welding wire gross weight 22～24% in U-lag;
(2) U-lag is healed up after, be rolled successively moulding, bright annealing, drawing tube reducing and process, obtain welding wire;
(3) welding wire surface is carried out mechanical chipping, obtain the final products that flux-cored wire is used in described austenitic stainless steel all-position welding.
Beneficial effect of the present invention is:
For all-position welding austenitic stainless steel flux-cored wire, when requiring welding wire to weld in positions such as vertical position welding, horizontal position welding, downhand weldings, all have good processing performance, namely arc stability is high, and spatter is few, and the removability of slag is good etc.
Austenitic stainless steel all-position welding flux-cored wire of the present invention is acid slag system.For guaranteeing vertical position welding, horizontal position welding welding technological properties, added 4.0～6.0wt% albite in welding wire medicine core of the present invention, to increase arc voltage, improve arc stiffness, prevent that the molten bath from dropping under Action of Gravity Field; And be to guarantee the downhand welding processing performance, add 2.0～4.0wt% potassic feldspar in welding wire medicine core, increase arc stability, reduce spatter.The weight ratio of controlling albite and potassic feldspar is 1.2～2.0, can take into account vertical position welding, horizontal position welding and the downhand welding performance of stainless flux-cored wire, obtains being applicable to the stainless flux-cored wire of all-position welding.For guaranteeing the anti-pore ability of stainless flux-cored wire, the total amount that adds of albite and potassic feldspar is no more than 10%.
Welding wire of the present invention is applicable to 100%CO
2Gas shielded arc welding; its all-position welding processing performance is good; quality of weld seam molding is good; the metallurgical imperfections such as pore-free, crackle, slag inclusion; the properties of welding wire deposited metal all meets GB and requires (GB/T17853 " stainless flux-cored wire "), is applicable to the all-position welding of austenitic stainless steel.
The specific embodiment
The invention provides a kind of austenitic stainless steel all-position welding with thin diameter flux-cored wire, it is comprised of external application steel band and welding wire medicine core wherein, and its specific embodiment is as follows:
Described external application steel band most preferably is phosphorus content less than the austenitic stainless steel strip 304L of 0.025wt%.
Described welding wire medicine core composed as follows:
Hafnium metal powfer: transition chromium element in the welding wire deposited metal, its weight percentage is (accounting for the weight percentage of medicine core, as follows) 20.0～23.0%.
Metal nickel powder: transition nickel element in the welding wire deposited metal, its weight percentage is 7.0～8.5%.
Electrolytic manganese metal: transition manganese element in the welding wire deposited metal, and can play deoxidation, desulfidation, its weight percentage is 2.0～4.0%.
Aluminium powder: deoxidation, the transfer coefficient of the alloying elements such as raising chromium, nickel, manganese, the aluminium oxide that generates after participation alloying element deoxygenation participates in slag making.Its weight percentage is 3.0～4.0%.
Ferrotianium: deoxidation, the transfer coefficient of the alloying elements such as raising chromium, nickel, manganese, the titanium oxide that generates after participation alloying element deoxygenation can also participate in slag making, and its weight percentage is 0.5～1.0%.
Rutile: main slag former, can improve the removability of slag and the forming quality of weld metal, appropriate rutile can improve arc stability, but addition too much can reduce the electric arc quality on the contrary, and its weight percentage is 32.0～34.0%.
Quartzy: main slag former, the acidity of increase slag, viscosity and the oxidisability of adjustment slag, but addition too much can increase oxide inclusions amount in deposited metal, reduces quality of weld seam molding, and its weight percentage is 1.0～2.0%.
Zircon sand: main slag former, adjust the physical and chemical performance of slag, improve the removability of slag of weld metal, improve fusing coefficient, its weight percentage is 2.0～4.0%.
Albite: be used for slag making, adjust the welding arc quality, albite can increase arc stiffness, improve blow force of arc, and its weight percentage is 4.0～6.0%.
Potassic feldspar: be used for slag making, adjust the welding arc quality, potassic feldspar can stable arc, reduce blow force of arc, reduces spatter, and its weight percentage is 2.0～4.0%.
In flux-cored wire of the present invention, the weight ratio of controlling albite and potassic feldspar is 1.2～2.0, can take into account vertical position welding, horizontal position welding and the downhand welding performance of stainless flux-cored wire, obtains being applicable to the stainless flux-cored wire of all-position welding.But the addition of feldspar is excessive, can increase the acidity of slag, cause that in weld metal, the silica slag inclusion increases, and increase the pore tendency, in the stainless flux-cored wire medicine core that therefore the present invention relates to, the weight that adds of albite and potassic feldspar can not surpass 10% of medicine core weight.
Ice crystal: dehydrogenation, increase weld seam skull mobility, reduce weld metal pore tendency, its weight percentage is 1.0～1.5%.
Lithium carbonate: be decomposed into lithia and carbon dioxide in welding process, improve the anti-pore ability of weld metal, its weight percentage is 1.0～1.5%.
Bismuth oxide: improving the removability of slag of weld metal, is the important component that stainless flux-cored wire improves the removability of slag, and its weight percentage must not be lower than 0.1%; For preventing that bismuth oxide from too much adding the high-temperature behavior that reduces deposited metal, its weight percentage must not be higher than 0.5%.
All the other are iron powder.
Following steps are adopted in the manufacturing of austenitic stainless steel flux-cored wire used for welding of the present invention:
(1) with thickness 0.4mm, the ultra-low carbon austenitic stainless steel band of width 10mm rolls into U-shaped, adds the medicinal powder that accounts for welding wire gross weight 22～24% of the present invention in U-lag;
(2) U-lag is healed up after, by roll forming, bright annealing, drawing tube reducing, finally reach finished diameter, finished diameter is between 0.9mm～1.2mm.
(3) welding wire surface is carried out mechanical chipping, obtain final products.
Embodiment 1
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3545g, it is rolled into U-shaped, with the 200g hafnium metal powfer, the 70g metal nickel powder, the 20g electrolytic manganese metal, 30g aluminium powder, 5g ferrotianium, the 320g rutile, 10g is quartzy, 20g zircon sand, 40g albite, the 20g potassic feldspar, the 10g ice crystal, 10g lithium carbonate, 3g bismuth oxide, the 242g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 22%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 0.9mm.
Embodiment 2
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3545g, it is rolled into U-shaped, with the 230g hafnium metal powfer, the 85g metal nickel powder, the 40g electrolytic manganese metal, 40g aluminium powder, 10g ferrotianium, the 340g rutile, 20g is quartzy, 40g zircon sand, 60g albite, the 40g potassic feldspar, the 15g ice crystal, 15g carbonate, 4g bismuth oxide, the 61g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 22%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 1.2mm.
Embodiment 3
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3348g, it is rolled into U-shaped, with the 220g hafnium metal powfer, the 75g metal nickel powder, the 25g electrolytic manganese metal, 32g aluminium powder, 6g ferrotianium, the 330g rutile, 15g is quartzy, 28g zircon sand, 45g albite, the 30g potassic feldspar, the 12g ice crystal, 12g lithium carbonate, 4g bismuth oxide, the 166g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 23%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 0.9mm.
Embodiment 4
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3348g, it is rolled into U-shaped, with the 210g hafnium metal powfer, the 80g metal nickel powder, the 35g electrolytic manganese metal, 38g aluminium powder, 8g ferrotianium, the 335g rutile, 18g is quartzy, 35g zircon sand, 50g albite, the 35g potassic feldspar, the 14g ice crystal, 13g lithium carbonate, 3g bismuth oxide, the 126g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 23%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 1.2mm.
Embodiment 5
Selecting thickness 0.4mm, width 10mm, weight is the ultra-low carbon austenitic stainless steel band 304L of 3170g, it is rolled into U-shaped, with the 200g hafnium metal powfer, the 70g metal nickel powder, the 20g electrolytic manganese metal, 30g aluminium powder, 5g ferrotianium, the 320g rutile, 10g is quartzy, 20g zircon sand, 40g albite, the 20g potassic feldspar, the 10g ice crystal, 10g lithium carbonate, 3g bismuth oxide, the 242g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 24%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 1.2mm.
Embodiment 6
Select thickness 0.4mm, width 10mm, weight is 3170g ultra-low carbon austenitic stainless steel band 304L, it is rolled into U-shaped, with the 230g hafnium metal powfer, the 85g metal nickel powder, the 40g electrolytic manganese metal, 40g aluminium powder, 10g ferrotianium, the 340g rutile, 20g is quartzy, 40g zircon sand, 60g albite, the 40g potassic feldspar, the 15g ice crystal, 15g lithium carbonate, 4g bismuth oxide, the 61g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 24%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 1.2mm.
Comparative Examples 1
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3545g, it is rolled into U-shaped, with the 200g hafnium metal powfer, the 70g metal nickel powder, the 20g electrolytic manganese metal, 30g aluminium powder, 5g ferrotianium, the 330g rutile, 10g is quartzy, 20g zircon sand, 20g albite, the 40g potassic feldspar, the 10g ice crystal, 10g lithium carbonate, 3g bismuth oxide, the 232g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 22%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 0.9mm.
Comparative Examples 2
Select thickness 0.4mm, width 10mm, weight is 3170g ultra-low carbon austenitic stainless steel band 304L, it is rolled into U-shaped, with the 230g crome metal, the 85g metallic nickel, the 40g electrolytic manganese metal, 40g aluminium powder, 10g ferrotianium, the 330g rutile, 20g is quartzy, 40g zircon sand, 60g albite, the 20g potassic feldspar, the 15g ice crystal, 15g lithium carbonate, 4g bismuth oxide, the 91g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 24%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 0.9mm.
Comparative Examples 3
Select thickness 0.4mm, width 10mm, weight is 3170g ultra-low carbon austenitic stainless steel band 304L, it is rolled into U-shaped, with the 230g crome metal, the 85g metallic nickel, the 40g electrolytic manganese metal, 40g aluminium powder, 10g ferrotianium, the 340g rutile, 20g is quartzy, 40g zircon sand, 60g albite, the 50g potassic feldspar, the 15g ice crystal, 15g lithium carbonate, 4g bismuth oxide, the 51g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 24%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 1.2mm.
Comparative Examples 4
Selecting thickness 0.4mm, width 10mm, weight is the austenic stainless steel belt 304L of 3545g, it is rolled into U-shaped, with the 200g crome metal, the 70g metallic nickel, the 20g electrolytic manganese metal, 30g aluminium powder, 5g ferrotianium, the 320g rutile, 10g is quartzy, 20g zircon sand, 30g albite, the 15g potassic feldspar, the 10g ice crystal, 10g lithium carbonate, 3g bismuth oxide, the 257g iron powder, 1000g medicinal powder altogether mixedly adds in U-shaped groove after evenly, and filling rate is 22%, after healing up, through tube reducing, bright annealing, tube reducing again, the final finished gage of wire is 0.9mm.
Evaluation to each embodiment and Comparative Examples performance:
Evaluation there is no unified standard in view of the flux-cored wire welding technological properties, uses JB/T8423 " welding rod welding technological properties assessment method " welding technological properties (appearance of weld, arc stability, the weld seam removability of slag, spatter rate etc., weld porosity tendency) of stainless flux-cored wire is estimated.The Contrast on effect of each embodiment and Comparative Examples is as shown in table 1:
The welding wire performance evaluation of each embodiment of table 1 and Comparative Examples
Annotate: 1. difference is molten bath tenesmus in welding process, and quality of weld seam molding is poor.
As shown in table 1, the weight ratio of albite, potassic feldspar is less than 1.2 Comparative Examples 1, and when its vertical position welding and horizontal position welding, quality of weld seam molding is poor; The weight ratio of albite, potassic feldspar is greater than 2 Comparative Examples 2, and spatter is significantly higher than each embodiment; Albite, potassic feldspar add total amount to surpass the Comparative Examples 3 of medicine core weight 10wt%, and the weld porosity tendency is significantly higher than other embodiment and Comparative Examples; Albite, potassic feldspar add the too low Comparative Examples of total amount 4, and quality of weld seam molding and arc stability are significantly lower than other embodiment and Comparative Examples.
The flux-cored wire of the present invention that embodiment 1～6 is made, its all-position welding good manufacturability, arc stability is high, and the spatter rate is low, and the weld porosity tendency is low, and its combination property significantly is better than Comparative Examples 1～4.
Claims (1)
1. austenitic stainless steel all-position welding flux-cored wire, it is comprised of medicine core and external application stainless steel band, it is characterized in that, described medicine core accounts for 22.0～24.0% of welding wire gross weight, the percentage by weight that its each component of Chinese medicine core accounts for described medicine core is: hafnium metal powfer: 20.0～23.0%, metal nickel powder: 7.0～8.5%, electrolytic manganese metal: 2.0～4.0%, aluminium powder: 3.0～4.0%, ferrotianium: 0.5～1.0%, rutile: 32.0～34.0%, quartzy: 1.0～2.0%, zircon sand: 2.0～4.0%, albite: 4.0～6.0%, potassic feldspar: 2.0～4.0%, ice crystal: 1.0～1.5%, lithium carbonate: 1.0～1.5%, bismuth oxide: 0.1～0.5%, all the other are iron powder,
Wherein, the ratio of albite and potassic feldspar is 1.2～2.0, and both addition sums are no more than 10% of medicine core weight;
Described external application stainless steel band is austenic stainless steel belt 304L, and its phosphorus content is less than 0.025wt%;
The diameter of described flux-cored wire is between 0.9mm～1.2mm.
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| CN102229029A (en) | 2011-11-02 |
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Effective date of registration: 20210129 Address after: 100192 building 23, Aobei Science Park, No.1 courtyard, Baosheng South Road, Haidian District, Beijing Patentee after: Beijing Yuanda International Engineering Management Consulting Co.,Ltd. Patentee after: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group Address before: 101106 No.2, liangliwu street, East District, Tongzhou Economic Development Zone, Tongzhou District, Beijing Patentee before: ZHONGYE WELDING TECHNOLOGY Co.,Ltd. Patentee before: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group |