CN101386115B - Flux-cored wire for cold rolling middle roller transient layer built-up welding and preparation method thereof - Google Patents
Flux-cored wire for cold rolling middle roller transient layer built-up welding and preparation method thereof Download PDFInfo
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- CN101386115B CN101386115B CN2008103049086A CN200810304908A CN101386115B CN 101386115 B CN101386115 B CN 101386115B CN 2008103049086 A CN2008103049086 A CN 2008103049086A CN 200810304908 A CN200810304908 A CN 200810304908A CN 101386115 B CN101386115 B CN 101386115B
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Abstract
The invention relates to a flux-cored welding wire used for a bead welding of a transition layer of a cold-rolling intermediate roll and a preparation method thereof, which pertains to the field of welding material. The technical problem of the invention is to provide a bead-welding flux-cored welding wire used for repairing the transition layer of the cold-rolling intermediate roll. The welding wire can form good hardness transition between a roll base metal and a bead-welding work layer. The weight radio of the chemical composition of the flux core of the flux-cored welding wire is as follows: 0.150 percent to 0.20 percent C, 0.40 percent to 0.90 percent Si, 0.50 percent to 1.0 percent Mn, 4.0 percent to 6.0 percent Cr, 0.5 percent to 1.2 percent Ni, 0.50 percent to 1.7 percent Mo, 0.35 percent to 0.70 percent V, 0.03 percent to 0.10 percent Nb, 0.05 percent to 0.50 percent Re, equal to or less than 0.035 percent S, equal to or less than 0.035 percent P, the excess is Fe and inevitable impurity, and the sum of all percentages is 100 percent.
Description
Technical field
The present invention relates to cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding and preparation method thereof, belong to field of welding material.
Background technology
Cold rolling intermediate calender rolls is that cold-rolled steel sheet is produced required critical component, bear bigger alternate stress during work, hardness of roll body reaches HRC54～59, also require to have the ability of anti-strip preferably simultaneously, for this reason, present manufacturer generally adopts high-carbon low-alloy steel such as 9Cr3Mo through forging and the manufacturing of complicated heat treatment process forms, and costs an arm and a leg.The consumption of the annual cold rolling intermediate calender rolls of China is very big, and it is also very big and the cold rolling intermediate calender rolls of most of breakages is not repaired just scrap, cause enormous economic loss that it repairs difficulty.
Technique for overlaying is mainly adopted in the reparation of cold rolling intermediate calender rolls, and it comprises weld preheating, built-up welding and the post weld heat treatment process of roller.Built-up welding comprises the transition zone built-up welding, and the resurfacing welding material that uses in this operation is the key factor in decision surfacing layer metal performance and cold rolling intermediate calender rolls service life.The draught pressure that is subjected in the cold rolling intermediate calender rolls use is very big, and the fatigue stress of bearing is also very big, needs better hardness, intensity and anti-fatigue ability,
The existing transition zone welding wire that is used for cold rolling intermediate calender rolls reparation is generally used H08A welding wire or H08Mn
2The Si welding wire, its carbon content is low, and alloying element content is not high, and hardness is low, and built-up welding is difficult for cracking on roller.But because transition zone hardness is low, between roll mother metal and built-up welding transition zone, can not form a good hardness transition, under bigger draught pressure effect, be easy to generate the conquassation phenomenon; Simultaneously because the transition zone alloying element content is not high, when the built-up welding transition zone, between transition zone and working lining, the accurate transition zone of more thickness will be arranged, and (accurate transition zone is the part of transition zone, alloying element content wherein since the dilution of transition zone between transition zone and working lining alloying element content, the hardness of accurate transition zone and intensity are also between transition zone and working lining hardness and intensity, transition zone is deducted thickness area behind the accurate transition zone effective transition zone), effectively the thickness of transition zone will reduce, and has weakened the result of use of cold rolling intermediate calender rolls after the built-up welding.
Summary of the invention
First technical problem to be solved by this invention provides a kind of repair cold-rolling intermediate calender rolls transition zone flux-cored wire, and this welding wire can form good hardness transition between roll mother metal and built-up welding working lining.
The cold rolling intermediate calender rolls transition zone of the present invention flux-cored welding wire for overlaying welding, its medicine core chemical component weight proportioning be 0.150～0.20%C, 0.40～0.90%Si, 0.50～1.0%Mn, 4.0～6.0%Cr, 0.5～1.2%Ni, 0.50～1.7%Mo, 0.35～0.70%V, 0.03～0.10%Nb, 0.05～0.50%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, and the percentage sum is 100%.
Wherein, above-mentioned medicine core can adopt metal, alloy, ore etc. to form for feedstock production, in order to make raw material sources more convenient so that save cost, it is that feedstock production forms that above-mentioned medicine core preferably adopts ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel (or ferronickel), ferrosilicon, rare earth and iron powder.
Further, better for the performance that makes cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding, the granularity of above-mentioned raw materials is preferably 60～120 orders.
Second technical problem to be solved by this invention provides a kind of preparation method of above-mentioned cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding, and this method comprises the steps:
A, with ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel (or ferronickel), ferrosilicon, rare earth and iron powder be raw material get in proportion the material and mixing, get the material ratio so that the mixed chemical component weight proportioning of raw material satisfies following requirement:
0.150～0.20%C, 0.40～0.90%Si, 0.50～1.0%Mn, 4.0～6.0%Cr, 0.5～1.2%Ni, 0.50～1.7%Mo, 0.35～0.70%V, 0.03～0.10%Nb, 0.05～0.50%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, and the percentage sum is 100%;
B, the raw material behind the mixing is packed in the pipe silk foreskin steel band, stretch, promptly can be made into flux-cored wire.
Wherein, the granularity of above-mentioned raw material is 60～120 orders.
The effect of the various elements that add among the present invention is as follows:
Because the carbon content of cold rolling intermediate calender rolls mother metal is higher, and the carbon content of transition zone welding wire is lower, on cold rolling intermediate calender rolls mother metal during built-up welding, the carbon content of surfacing layer metal just can reduce a lot, thereby is not prone to crackle in the weld deposit process like this.
The deoxidizing capacity of Si is very strong, can form SiO with the FeO effect
2, enter slag then and be excluded; Si can improve the quenching degree and the intensity of surfacing layer metal, and improves its temper resistance, but Si content can not be too high, thereby otherwise easily produces grain boundary carbide and be prone to crackle.
V and Nb element all have stronger crystal grain thinning and solution strengthening ability, and V and Nb element also have stronger precipitation strength ability, better effects if when two kinds of elements add simultaneously.They and Mo element all are the strong carbide forming elements, add that these alloying elements make the crystallite dimension of deposited metal little, hardness is high, toughness is better.
Adding Ni element can improve the intensity and the toughness of alloy, contains at the same time under the situation of Ni and Cr element, and the Ni element can also improve the temper resistance of hardfacing alloy layer greatly.
Add more Cr and improve the Cr/C ratio, easily generate the high rigidity M of isolated strip form
7C
3The type carbide, than the M of net distribution
3C type carbide can strengthen the continuity of matrix, thereby improves the toughness of integral material.
The Mn element can promote the dissolving of strong carbide in austenite, and the content of alloying element in balance carbide and the austenite is given full play to the precipitation strength and the solution strengthening ability of V, Nb and Mo element; In addition, improve Mn/C, thereby improve the toughness of overlay cladding to a certain extent, but Mn content is unsuitable too high, otherwise can increase the temper brittleness of overlay cladding than the effect that can also play the formation that reduces grain boundary carbide.
The adding of rare earth has hardfacing alloy to suppress preferably hydrogen embrittlement, reduce temper brittleness and suppress P poly-partially ability on crystal boundary in heat treatment process, thereby can reach the purpose of the toughness of raising hardfacing alloy.In addition, because rare earth has the effect that makes inclusion modification, purifies crystal boundary and stronger crystal grain thinning, join in the resurfacing welding material and can play the effect of improving the overlay cladding performance.
The preparation method of the cold rolling intermediate calender rolls transition zone of the present invention flux-cored welding wire for overlaying welding is simple, the welding wire built-up welding metal hardness can reach HRC25～35, cracking resistance is good in the weld deposit process, can between roll mother metal and built-up welding working lining, form good hardness transition, to the specification requirement of transition zone, have broad application prospects when reaching cold rolling intermediate calender rolls built-up welding fully and repairing.
The specific embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described.
Embodiment 1
Ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel, ferrosilicon, rare earth, iron powder are got material, be contained in after evenly mixing on the pipe silk foreskin steel band, be drawn into then and make welding wire.The mixed chemical Composition Control of each raw material exists: 0.150%C, 0.40%Si, 0.50%Mn, 4.0%Cr, 0.5%Ni, 0.50%Mo, 0.35%V, 0.03%Nb, 0.05%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, below all be weight percentage, the percentage sum is 100%.
After measured, after this welding wire was used for built-up welding, the hardness of surfacing layer metal was greater than HRC25, and its hardness is moderate, and it forms a good hardness transition between roll mother metal and built-up welding working lining, be not easy to produce the conquassation phenomenon under bigger draught pressure effect; Simultaneously because the transition zone alloying element content is higher, when the built-up welding working lining, between transition zone and working lining, the accurate working lining that less thickness will be arranged, general 4～5mm, when built-up welding same thickness transition zone and working lining, the working lining thickness effective, that hardness is high is more, thus the result of use of cold rolling intermediate calender rolls after the assurance built-up welding.
Embodiment 2
Ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, ferronickel, ferrosilicon, rare earth, iron powder are got material, be contained in after evenly mixing on the pipe silk foreskin steel band, be drawn into welding wire then.The mixed chemical Composition Control of each raw material exists: 0.180%C, 0.75%Si, 0.75%Mn, 5.0%Cr, 0.9%Ni, 1.2%Mo, 0.50%V, 0.06%Nb, 0.25%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, below all be weight percentage, the percentage sum is 100%.
After measured, after this welding wire was used for built-up welding, the hardness of surfacing layer metal was greater than HRC30, and its hardness is moderate, formed a good hardness transition between roll mother metal and built-up welding working lining, was not easy to produce the conquassation phenomenon under bigger draught pressure effect.
Embodiment 3
Ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel, ferrosilicon, rare earth, iron powder are got material, be contained in after evenly mixing on the pipe silk foreskin steel band, be drawn into welding wire then.The mixed chemical Composition Control of each raw material exists: 0.20%C, 0.80%Si, 1.0%Mn, 6.0%Cr, 1.2%Ni, 1.7%Mo, 0.70%V, 0.10%Nb, 0.50%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, below all be weight percentage, the percentage sum is 100%.
After measured, after this welding wire was used for built-up welding, the hardness of surfacing layer metal was greater than HRC32, and its hardness is moderate, formed a good hardness transition between roll mother metal and built-up welding working lining, was not easy to produce the conquassation phenomenon under bigger draught pressure effect.
Claims (5)
1. cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding, it is characterized in that: its medicine core chemical component weight proportioning be 0.150～0.20%C, 0.40～0.90%Si, 0.50～1.0%Mn, 4.0～6.0%Cr, 0.5～1.2%Ni, 0.50～1.7%Mo, 0.35～0.70%V, 0.03～0.10%Nb, 0.05～0.50%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, and the percentage sum is 100%.
2. cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding according to claim 1 is characterized in that: it is that feedstock production forms that described medicine core adopts ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel (or ferronickel), ferrosilicon, rare earth and iron powder.
3. cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding according to claim 2, it is characterized in that: the granularity of described raw material is 60～120 orders.
4. the preparation method of claim 1 or 2 described cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding is characterized in that: comprise the steps:
A, with ferromanganese, ferrochrome, molybdenum-iron, vanadium iron, ferro-niobium, metallic nickel (or ferronickel), ferrosilicon, rare earth and iron powder be raw material get in proportion the material and mixing, get the material ratio so that the mixed chemical component weight proportioning of raw material satisfies following requirement:
0.150～0.20%C, 0.40～0.90%Si, 0.50～1.0%Mn, 4.0～6.0%Cr, 0.5～1.2%Ni, 0.50～1.7%Mo, 0.35～0.70%V, 0.03～0.10%Nb, 0.05～0.50%Re ,≤0.035%S ,≤0.035%P, surplus is Fe and unavoidable impurities, and the percentage sum is 100%;
B, the raw material behind the mixing is packed in the pipe silk foreskin steel band, stretch, promptly can be made into flux-cored wire.
5. the preparation method of cold rolling intermediate calender rolls transition zone flux-cored welding wire for overlaying welding according to claim 4: it is characterized in that: the granularity of described raw material is 60～120 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103049086A CN101386115B (en) | 2008-10-13 | 2008-10-13 | Flux-cored wire for cold rolling middle roller transient layer built-up welding and preparation method thereof |
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|---|---|---|---|
| CN2008103049086A CN101386115B (en) | 2008-10-13 | 2008-10-13 | Flux-cored wire for cold rolling middle roller transient layer built-up welding and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101386115A CN101386115A (en) | 2009-03-18 |
| CN101386115B true CN101386115B (en) | 2011-03-16 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240868A (en) * | 2011-05-13 | 2011-11-16 | 天津雷公焊接材料有限公司 | High-tenacity wear-resisting overlaying alloy welding wire for cold-rolling support roller |
| CN102357750B (en) * | 2011-09-21 | 2013-05-22 | 于风福 | Flux-cored wire bead welding material |
| CN102689116B (en) * | 2012-06-11 | 2014-07-02 | 中冶焊接科技有限公司 | Preparation method of flux-cored wires with refined deposited metal crystalline grains and uniform tissues |
| CN102689106B (en) * | 2012-06-12 | 2014-07-02 | 中冶焊接科技有限公司 | Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank |
| CN103286475B (en) * | 2013-03-08 | 2015-09-16 | 秦皇岛威尔德特种焊业有限责任公司 | A kind of flux-cored wire for hot-rolling supporting roll Bead weld repair and anti-flow harden |
| CN103286479B (en) * | 2013-03-08 | 2015-04-08 | 秦皇岛威尔德特种焊业有限责任公司 | Rare-earth flux-cored wire for surfacing repair and remanufacturing of hot rolled support roll |
| CN103418923B (en) * | 2013-08-30 | 2015-06-17 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104551436B (en) * | 2014-11-13 | 2016-05-18 | 上海施威焊接产业有限公司 | A kind of surfacing and repairing flux-cored wire |
| CN110026706B (en) * | 2019-03-20 | 2021-05-28 | 江苏孚尔姆焊业股份有限公司 | Wear-resistant flux-cored wire for oil drill pipe head and manufacturing method thereof |
| CN115283942A (en) * | 2022-06-28 | 2022-11-04 | 重庆大学 | Roller manufacturing and repairing method |
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Patent Citations (5)
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| JP2001191197A (en) * | 1999-12-28 | 2001-07-17 | Mitsubishi Heavy Ind Ltd | Material for mig welding |
| CN1238152C (en) * | 2002-10-09 | 2006-01-25 | 天津大学 | Build-up welding chemical core wire for repairing cold rolling middle roller transition layer |
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| CN101386115A (en) | 2009-03-18 |
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