CN101658980A - Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk - Google Patents
Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk Download PDFInfo
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- CN101658980A CN101658980A CN200810146876A CN200810146876A CN101658980A CN 101658980 A CN101658980 A CN 101658980A CN 200810146876 A CN200810146876 A CN 200810146876A CN 200810146876 A CN200810146876 A CN 200810146876A CN 101658980 A CN101658980 A CN 101658980A
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Abstract
The present invention provides an open arc overlaying wire material with strong abrasive resistance for a grinding roller and a grinding disk, which consists of a steel sheet and powder arranged in the steel sheet. A nano additive (A) is added into the powder, wherein the nano additive (A) can be one or any combination of three of nano TiN (titanium nitride), nano SiN (silicon nitride) and nano SiC (silicon carbide). The powder contains 3 to 5 weight percent of the nano additive (A). The nano additive (A) has the functions of strengthening dispersion of nano ceramic phases, improves cohesion strength, rupture strength and combination strength of a cladding layer material and has good high-temperature stability; and the nano additive (A) improves self lubricity of the material, improves theabrasive resistance of cladding layer metals and prolongs service life of the grinding roller and the grinding disk processed by overlaying. The service life of the grinding roller and the grinding disk processed by the overlaying is improved by 1.5 to 2 times than that processed by open arc overlaying; and the cladding efficiency is improved by 10 to 20 percent so as to save the overlaying wirematerial. The open arc overlaying wire material has light fume and less molten metal spatter in the process of overlaying, and a weld pass is smooth after the material is molded.
Description
[affiliated technical field]
The present invention belongs to the Surface Engineering built-up welding to repair manufacture field, relate to a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk, can be widely used on the wearing piece of various wear-resisting machineries of industries such as coal, electric power, metallurgy, machinery, chemical industry, can be used for the built-up welding reparation and make new wearing piece.
[background technology]
Because the national economy high speed development is urgent to the electric power energy demand, has promoted the manufacturing fast development of China's station boiler.In recent years, station boiler is compared the thermal efficiency height of ultra supercritical unit, capable of saving fuel at least 4～5% to overcritical and ultra supercritical development with the supercritical unit of routine.The coal-fired unit of a new generation's large-capacity ultra-supercritical has possessed good economy, environmental protection and startup peaking operation performance, and still keeps higher efficient when underload.Proceeding from our national conditions, development ultra supercritical unit helps reducing the average net coal consumption rate of China, helps the stability and the economy of peak load regulation network, helps keeping ecological environment, improves Environmental Protection Level, helps realizing technological leapfrogging.
Follow overcritical and extensive use ultra-supercritical boiler, a large amount of unit pulverized-coal systems of using the band medium-speed pulverizers in coal-burning power plant's Generator Set.Advantages such as medium-speed pulverizer is low with power consumption, noise is little, facility compact, airborne dust are few are used widely in China in recent years.
Therefore the operating period of the coal-grinding member of medium-speed pulverizer, prolongs the service life of medium-speed pulverizer generally about 5000 hours, and the maintenance cost that reduces equipment is that enterprise such as coal-burning power plant needs the problem of solution badly in recent years.Adopt bead-welding technology reparation or new system medium-speed pulverizer grinding roller and grinding disk, can on the basis of improving stock utilization, prolong the service life of equipment, represented the technical advantage of built-up welding.When adopting submerged arc overlay welding to repair medium-speed pulverizer, need equipment such as dismounting grinding roller and mill to carry out the off-line reparation, increased repair time and cost; And the open arc built-up welding can well realize online built-up welding, can finish repair under the state that equipment is not taken out stitches, and has reduced time cost and workman's operation intensity, and promotion potential is huge.
Grinding roller and grinding disk service life of common open arc built-up welding reparation or new system is at 5000～10000 hours, and in addition, flue dust is bigger during existing open arc welding wire welding, is all possessing sizable rising space aspect service life and the effect.
[summary of the invention]
The objective of the invention is to overcome the weak point of prior art, in the medicinal powder of open arc flux-cored wire, added nanoscale nanometer additive (A), play the dispersion-strengthened action of nano ceramics phase, strengthen the cohesive strength of cladding layer material, fracture strength and bond strength, and possess the good high-temperature stability; Improve the self lubricity of material, improve the wearability that the cladding layer metal possesses, prolong the service life of the grinding roller and grinding disk after built-up welding is handled, handle raising 1.5-2 times than existing open arc built-up welding the service life of the grinding roller and grinding disk of handling through built-up welding provided by the invention.
The invention provides a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk is made up of sheetmetal and the medicinal powder that is arranged in the sheetmetal, in medicinal powder, added nanometer additive (A), nanometer additive (A) can be nano TiN (titanium nitride), nanometer SiN (silicon nitride), any combination of a kind of or three in the nano SiC (carborundum).
The content (weight %) of the nanometer additive that described medicinal powder contains (A) is 3～5%.
The chemical composition of described medicinal powder (weight %) is:
Chromium carbide (Cr
3C
2) 10～20%; High carbon ferro-chrome 30～40%; Ferromanganese (MnFe) 2～5%; Ferrosilicon (SiFe) 5～10%; Molybdenum-iron (MoFe) 0～5% or ferro-niobium (NbFe) 0～8%; Nanometer additive (A) 3～5%; Chromium powder (Cr) 5～10%; Graphite (C) 3～5%; Titanium oxide (TiO
2) 5～10%; Calcirm-fluoride (CaF
2) 10～15%; Silica (SiO
2) 2～5%.
The filling rate 45～60% of described medicinal powder.
Described silk material diameter is Φ 2.4mm, Φ 2.8mm, one of three kinds of specifications of Φ 3.2mm.
The chemical composition of described medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 16%; High carbon ferro-chrome 38%; Ferromanganese (MnEe) 2.8%; Ferrosilicon (SiFe) 5.5%; Molybdenum-iron (MoFe) 3%; Nanometer additive (A) 3.2%; Chromium powder (Cr) 7.5%; Graphite (C) 4%; Titanium oxide (TiO
2) 6%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
The chemical composition of described medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 18%; High carbon ferro-chrome 35%; Ferromanganese (MnFe) 2.5%; Ferrosilicon (SiFe) 5.5%; Ferro-niobium (NbFe) 4%; Nanometer additive (A) 5%; Chromium powder (Cr) 7%; Graphite (C) 4%; Titanium oxide (TiO
2) 5%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
By technique scheme, the present invention has following advantage at least:
1, the existing open arc flux-cored wire of contrast, control the amount ranges of mineral materials such as slag making, gas making in the open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk medicinal powder prescription provided by the invention, soot dust granule is thinner in the weld deposit process, and flue dust is light, motlten metal splashes few, and welding bead is smooth after the moulding.
2, the existing open arc flux-cored wire of contrast, the metallics percentage composition improves in the open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk medicinal powder provided by the invention, make cladding layer metal effective rate of utilization promote, the reduction of iron loss rate simultaneously also helps improving deposition efficiency, novel welding wire powder core cladding efficient of the present invention improves 10～20%, can save the surfacing welding wire material use quantity in a large number.
[specific embodiment]
Below, will describe example of the present invention in detail.The invention is not restricted to example.
Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk of the present invention is made up of sheetmetal and the medicinal powder that is arranged in the sheetmetal, and the chemical composition of medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 10～20%; High carbon ferro-chrome 30～40%; Ferromanganese (MnFe) 2～5%; Ferrosilicon (SiFe) 5～10%; Molybdenum-iron (MoFe) 0～5% or ferro-niobium (NbFe) 0～8%; Nanometer additive (A) 3～5%; Chromium powder (Cr) 5～10%; Graphite (C) 3～5%; Titanium oxide (TiO
2) 5～10%; Calcirm-fluoride (CaF
2) 10～15%; Silica (SiO
2) 2～5%.
Embodiment 1
The chemical composition of medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 16%; High carbon ferro-chrome 38%; Ferromanganese (MnFe) 2.8%; Ferrosilicon (SiFe) 5.5%; Molybdenum-iron (MoFe) 3%; Nanometer additive (A) 3.2%; Chromium powder (Cr) 7.5%; Graphite (C) 4%; Titanium oxide (TiO
2) 6%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
Embodiment 2
The chemical composition of medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 18%; High carbon ferro-chrome 35%; Ferromanganese (MnFe) 2.5%; Ferrosilicon (SiFe) 5.5%; Ferro-niobium (NbFe) 4%; Nanometer additive (A) 5%; Chromium powder (Cr) 7%; Graphite (C) 4%; Titanium oxide (TiO
2) 5%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
The filling rate 45～60% of medicinal powder.Silk material diameter of phi 2.4mm of the present invention, Φ 2.8mm, three kinds of specifications of Φ 3.2mm.
In the chemical composition of medicinal powder, the nanometer additive that contains (A) can be nano TiN (titanium nitride), nanometer SiN (silicon nitride), any combination of a kind of or three in the nano SiC (carborundum).In the medicinal powder of open arc flux-cored wire, add nanoscale nanometer additive (A), played the dispersion-strengthened action of nano ceramics phase, strengthened the cohesive strength of cladding layer material, fracture strength and bond strength, and possess the good high-temperature stability; Improve the self lubricity of material, improve the wearability that the cladding layer metal possesses, prolong the service life of the grinding roller and grinding disk after built-up welding is handled, handle raising 1.5-2 times than existing open arc built-up welding the service life of the grinding roller and grinding disk of handling through built-up welding provided by the invention.
Reduced the consumption of mineral materials such as slag making, gas making in the chemical composition of medicinal powder, as calcirm-fluoride (CaF
2) content range be controlled at 10～15%, soot dust granule is thinner in the weld deposit process, flue dust is light, it is few that motlten metal splashes, welding bead is smooth after the moulding.
The metallics percentage composition improves in the chemical composition of medicinal powder, makes the welding wire deposition efficiency promote, and novel welding wire powder core cladding efficient of the present invention improves 10～20%, can save the surfacing welding wire material use quantity in a large number.
Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk of the present invention is exclusively used in open arc built-up welding operation: the cladding layer metal hardness reaches HRC58～65, the anti-wear performance height; Improved 1.5～2 times in 5000～10000 hours that handle than common open arc built-up welding the service life of the grinding roller and grinding disk after built-up welding is handled; Deposition efficiency improves 10～20%, has therefore saved the surfacing welding wire material use quantity; Flue dust is light in the weld deposit process, and motlten metal splashes few, and welding bead is smooth after the moulding; Add nano level nanometer additive (A) in the medicinal powder, played the dispersion-strengthened action of nano ceramics phase, with the cohesive strength of enhancing cladding layer material, fracture strength and bond strength, and possess the good high-temperature stability, improve the self lubricity of material etc.
Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk of the present invention is not restricted to the described embodiments, any in the claimed scope of claims of the present invention improvement and change all within protection scope of the present invention.
Claims (7)
1, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk, form by sheetmetal and the medicinal powder that is arranged in the sheetmetal, it is characterized in that, in medicinal powder, added nanometer additive (A), nanometer additive (A) can be nano TiN (titanium nitride), nanometer SiN (silicon nitride), any combination of a kind of or three in the nano SiC (carborundum).
2, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 1 is characterized in that, the content (weight %) of the nanometer additive that described medicinal powder contains (A) is 3～5%.
3, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 2 is characterized in that, the chemical composition of described medicinal powder (weight %) is:
Chromium carbide (Cr
3C
2) 10～20%; High carbon ferro-chrome 30～40%; Ferromanganese (MnFe) 2～5%; Ferrosilicon (SiFe) 5～10%; Molybdenum-iron (MoFe) 0～5% or ferro-niobium (NbFe) 0～8%; Nanometer additive (A) 3～5%; Chromium powder (Cr) 5～10%; Graphite (C) 3～5%; Titanium oxide (TiO
2) 5～10%; Calcirm-fluoride (CaF
2) 10～15%; Silica (SiO
2) 2～5%.
4, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 3 is characterized in that, the filling rate 45～60% of described medicinal powder.
5, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 4 is characterized in that, described silk material diameter is Φ 2.4mm, Φ 2.8mm, one of three kinds of specifications of Φ 3.2mm.
6, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 5 is characterized in that, the chemical composition of described medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 16%; High carbon ferro-chrome 38%; Ferromanganese (MnFe) 2.8%; Ferrosilicon (SiFe) 5.5%; Molybdenum-iron (MoFe) 3%; Nanometer additive (A) 3.2%; Chromium powder (Cr) 7.5%; Graphite (C) 4%; Titanium oxide (TiO
2) 6%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
7, a kind of open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk as claimed in claim 5 is characterized in that, the chemical composition of described medicinal powder (weight %) is: chromium carbide (Cr
3C
2) 18%; High carbon ferro-chrome 35%; Ferromanganese (MnFe) 2.5%; Ferrosilicon (SiFe) 5.5%; Ferro-niobium (NbFe) 4%; Nanometer additive (A) 5%; Chromium powder (Cr) 7%; Graphite (C) 4%; Titanium oxide (TiO
2) 5%; Calcirm-fluoride (CaF
2) 10%; Silica (SiO
2) 4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101468761A CN101658980B (en) | 2008-08-27 | 2008-08-27 | Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101468761A CN101658980B (en) | 2008-08-27 | 2008-08-27 | Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101658980A true CN101658980A (en) | 2010-03-03 |
| CN101658980B CN101658980B (en) | 2012-05-30 |
Family
ID=41787347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101468761A Expired - Fee Related CN101658980B (en) | 2008-08-27 | 2008-08-27 | Open arc overlaying wire material with strong abrasive resistance for grinding roller and grinding disk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101658980B (en) |
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| CN101780536A (en) * | 2010-03-17 | 2010-07-21 | 任昊 | Composite wear-resistant alloy material for cast steel surface |
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| CN101780536A (en) * | 2010-03-17 | 2010-07-21 | 任昊 | Composite wear-resistant alloy material for cast steel surface |
| CN101934443A (en) * | 2010-09-17 | 2011-01-05 | 江西恒大高新技术股份有限公司 | Self-protective flux-cored soldering wire for surfacing of abrasion-resistant plate |
| CN101934443B (en) * | 2010-09-17 | 2016-07-06 | 江西恒大高新技术股份有限公司 | A kind of self-protective flux-cored soldering wire for surfacing of abrasion-resistant plate |
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| CN109175773A (en) * | 2018-10-23 | 2019-01-11 | 郑州大学 | A kind of mating flux-cored wire of bridge steel Q620qE |
| CN109175773B (en) * | 2018-10-23 | 2020-07-17 | 郑州大学 | Flux-cored wire matched with bridge steel Q620qE |
| CN109926166A (en) * | 2019-04-28 | 2019-06-25 | 四川省星船城水泥股份有限公司 | A kind of ball mill compartment component and ball mill |
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|---|---|
| CN101658980B (en) | 2012-05-30 |
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