CN101856776B - Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire - Google Patents
Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire Download PDFInfo
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- CN101856776B CN101856776B CN201010197421XA CN201010197421A CN101856776B CN 101856776 B CN101856776 B CN 101856776B CN 201010197421X A CN201010197421X A CN 201010197421XA CN 201010197421 A CN201010197421 A CN 201010197421A CN 101856776 B CN101856776 B CN 101856776B
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Abstract
The invention discloses a niobium strengthening wear-resisting submerged arc bead weld flux-cored wire, which comprises a low-carbon steel cored solder wire and a power flux core arranged in the cored solder wire, and is mainly characterized in that the power flux core comprises the following components by weight percent: 30-55% of high-carbon ferrochrome, 4-16% of ferrocolumbium, 3-8% of deoxidant and 25-55% of iron powder. The bead weld layer of the invention has the advantages of evenly distributed hardness and high abrasive resistance; and the welding technological properties thereof are excellent.
Description
Technical field
The present invention relates to a kind of niobium enhanced wear-resisting submerged arc bead weld flux-cored wire, belong to technical field of welding materials.
Background technology
Flux-cored wire is that alloying element (powder medicine core) is wrapped in the sheetmetal, through being drawn into the flux-cored wire that different-diameter forms.
Flux-cored wire forms the alloy layer with property such as wear-resistant, corrosion-resistant and high temperature resistant after welding fusing.Flux-cored wire submerged-arc welding occupies an important position in reparation and compound manufacturing, is widely used in the compound position of the mechanical structured members such as high abrasion damage of mechanical engineering structure.
The wear-resisting welding wire with flux core that built-up welding is at present repaired generally all contains alloying elements such as carbon, chromium, silicon, manganese, seldom or hardly contains the strong carbide forming element.
It is generally acknowledged; Reinforcing material surface strength and the effective way of improving wearability; Provide the case hardness and the obdurability of material, comparatively desirable layer institutional framework is the particle of equally distributed high-melting-point on tough and tensile, the continuous matrix, high rigidity, good stability.The wearability of built-up welding layer mainly by kind, distribution and the area of carbide than deciding.The chromium that is contained in the wear-resisting powder medicine core forms double carbide (Cr, Fe) with carbon and iron in weld deposit process
7C
3Hexagonal prism property structure, its case hardness is HV1200～1800, the hardness ratio front surface of side is low slightly.This shows, existingly be used for the flux-cored wire that built-up welding is repaired, far can not satisfy the roll of steel plant, the demand that the compound manufacturing of the coal-grinding roller of firepower electrical plant and engineering excavation machinery etc. and maintenance are reproduced etc.
Summary of the invention
The objective of the invention is to, through in powder medicine core, adding the niobium element, because the transfer coefficient of niobium is very high; Scaling loss is few, and niobium can fully carry out the transition in the built-up welding molten pool metal and preferentially combine with carbon, forms the core of the non-spontaneous nucleation of niobium carbide; And remarkable crystal grain thinning, and, play the effect of wear-resisting particle because niobium carbide can separately exist in the hardfacing alloy; Wearability is further improved, and a kind of niobium enhanced wear-resisting submerged arc bead weld flux-cored wire is provided.
The present invention realizes that the technical scheme of its purpose is:
A kind of niobium enhanced wear-resisting submerged arc bead weld flux-cored wire comprises mild steel cored solder wire and the powder medicine core that is located in the said cored solder wire; Said powder medicine core comprises high carbon ferro-chrome, deoxidier and iron powder; The filling rate of said powder medicine core in said cored solder wire is characterized in that in 30～50% scopes:
A, said powder medicine core also comprise ferro-niobium, and the weight percentage of its each component is (%):
High carbon ferro-chrome 30～55;
Ferro-niobium 4～16;
Iron powder 25～55;
Deoxidier 3～8.
The main effect of each component is in above-mentioned drug core component:
High carbon ferro-chrome: its composition is 62.0～72.0%Cr ,≤6.0%C, and surplus is Fe.By its transition alloy elements in hardfacing alloy.
Ferro-niobium: its composition is 70.0～80.0%Nb, and surplus is Fe, is preferentially combined to form the niobium carbide hard, wear-resistant mutually with carbon in the built-up welding layer by it.
Deoxidier: be ferrosilicon or ferromanganese or ferrosilicon and ferromanganese.The ferrosilicon composition is 40.0～47.0%Si, and surplus is Fe; The ferromanganese composition is 75.0～85.0%Mn, and surplus is Fe.Through the deoxidation of silicomanganese, and the intensity and the hardness of increase surfacing layer metal.
Iron powder: replenish alloying element to hardfacing alloy.
The filling rate of above-mentioned powder medicine core in cored solder wire can be according to actual instructions for use and operating mode, adjustment between 30%～50%.
Describe and to understand by the above given technical scheme and the effect of each component of powder medicine core; The present invention is owing to this strong carbide forming element of employing tungsten, and preferential the reaction with carbon generates the NbC hard mutually in built-up welding high temperature molten bath, and the ability even dispersion is distributed in the hardfacing alloy; Thereby when crystal grain thinning improves obdurability; Improve the hardness of overlay cladding, strengthened anti-wear performance, realized the object of the invention.
In technique scheme, the present invention advocates that said mild steel cored solder wire is the H08A steelwork, or the H10 steelwork.But be not limited to this.Result of the test shows phosphorus content at the mild steel product below 0.2%, all can be used for preparing cored solder wire of the present invention.
In technique scheme, the present invention advocates that also said deoxidier is a kind or 2 kinds in silicon and 2 kinds of metallic elements of manganese.Silicon and manganese all are the strong deoxidiers that is lower than aluminium, and wherein the deoxidizing capacity of silicon is higher than manganese.If adopt the silicomanganese combined deoxidation, then its deoxidation effect is desirable more.For this reason, the present invention recommends.Here should be noted that SiO
2The deslagging situation of-MnO product in hardfacing alloy.
After technique scheme is able to implement; Its result on trial shows: flux-cored wire welding technological properties of the present invention is good; The overlay cladding case hardness is evenly distributed, and average hardness is in HRC42～65 scopes, and wearability is 10-30 a times of Q235 carbon steel; And have the strong and alloying uniformity coefficient advantages of higher of anti-pore ability, realized original intention of the present invention.
Description of drawings
Fig. 1 is preparation technology's flow chart of a kind of specific embodiment of the present invention.
The specific embodiment
Below contrast accompanying drawing, the description through the specific embodiment is described further invention to the present invention.
One of specific embodiment is shown in accompanying drawing 1.
A kind of niobium is strengthened submerged-arc overlaying welding flux-cored wire, comprises H08A mild steel cored solder wire and the powder medicine core that is located in the said cored solder wire, and the proportioning of said powder medicine core is: said high carbon ferro-chrome 32%, said ferro-niobium 5%, the said ferrosilicon 6% of deoxidier, iron powder 57%.Filling rate 30%.Flux-cored wire overlay cladding average hardness HRC47.
Two of the specific embodiment is shown in accompanying drawing 1.
A kind of niobium is strengthened submerged-arc overlaying welding flux-cored wire, comprises H10 mild steel cored solder wire and the powder medicine core that is located in the said cored solder wire, and the proportioning of said powder medicine core is: said high carbon ferro-chrome 48%, said ferro-niobium 10%, the said ferromanganese 7% of deoxidier, iron powder 35%.Filling rate 45%.Flux-cored wire overlay cladding average hardness HRC60.
Can be understood by above-mentioned two instances, effect of the present invention is very good.
Claims (3)
1. a niobium enhanced wear-resisting submerged arc bead weld flux-cored wire comprises mild steel cored solder wire and the powder medicine core that is located in the said cored solder wire; Said powder medicine core comprises high carbon ferro-chrome, deoxidier and iron powder; The filling rate of said powder medicine core in said cored solder wire is characterized in that in 30～50% scopes:
A, said powder medicine core also comprise ferro-niobium, and the weight percentage of its each component is (%):
High carbon ferro-chrome 30～55;
Ferro-niobium 4～16;
Iron powder 25～55;
Deoxidier 3～8.
2. niobium enhanced wear-resisting submerged arc bead weld flux-cored wire according to claim 1 is characterized in that, said mild steel cored solder wire is the H08A steelwork, or the H10 steelwork.
3. niobium enhanced wear-resisting submerged arc bead weld flux-cored wire according to claim 1 is characterized in that, said deoxidier is a kind or 2 kinds in silicon and 2 kinds of elements of manganese.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010197421XA CN101856776B (en) | 2010-06-11 | 2010-06-11 | Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010197421XA CN101856776B (en) | 2010-06-11 | 2010-06-11 | Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire |
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| Publication Number | Publication Date |
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| CN101856776A CN101856776A (en) | 2010-10-13 |
| CN101856776B true CN101856776B (en) | 2012-07-18 |
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| CN201010197421XA Expired - Fee Related CN101856776B (en) | 2010-06-11 | 2010-06-11 | Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255414B (en) * | 2013-05-08 | 2015-10-28 | 北京工业大学 | High-entropy alloy coating that a kind of NbC strengthens and preparation method thereof |
| CN103255415A (en) * | 2013-05-08 | 2013-08-21 | 北京工业大学 | TiC-enhanced high-entropy alloy coating and preparation method thereof |
| CN104476012A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN105312795B (en) * | 2015-11-18 | 2017-09-26 | 中冶建筑研究总院有限公司 | Grinding roll overlaying high niobium high-chromium alloy cast-iron self-protection flux-cored wire and preparation method thereof |
| CN105665961A (en) * | 2016-04-22 | 2016-06-15 | 柳州凯通新材料科技有限公司 | High-wear-resistant alloy steel welding wire flux core |
| CN105665968A (en) * | 2016-04-22 | 2016-06-15 | 柳州凯通新材料科技有限公司 | Method for processing high-wear-resistant alloy welding wire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835289A (en) * | 1970-09-09 | 1974-09-10 | N Kakhovsky | Electrode for arc welding |
| CN1714987A (en) * | 2005-07-06 | 2006-01-04 | 湘潭大学 | High chromium rust free, wear resistance cored welding wire |
| CN101434017A (en) * | 2007-11-14 | 2009-05-20 | 中冶集团建筑研究总院 | Welding wire for welding cold-rolled steel strip strain roll |
| RU2356715C2 (en) * | 2007-03-01 | 2009-05-27 | Государственное Образовательное Учреждение Высшего Профессионального Образования "Омский Государственный Технический Университет" | Flux cored electrode |
-
2010
- 2010-06-11 CN CN201010197421XA patent/CN101856776B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835289A (en) * | 1970-09-09 | 1974-09-10 | N Kakhovsky | Electrode for arc welding |
| CN1714987A (en) * | 2005-07-06 | 2006-01-04 | 湘潭大学 | High chromium rust free, wear resistance cored welding wire |
| RU2356715C2 (en) * | 2007-03-01 | 2009-05-27 | Государственное Образовательное Учреждение Высшего Профессионального Образования "Омский Государственный Технический Университет" | Flux cored electrode |
| CN101434017A (en) * | 2007-11-14 | 2009-05-20 | 中冶集团建筑研究总院 | Welding wire for welding cold-rolled steel strip strain roll |
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