CN101497977A - High chromium aluminum type high wear resistant arc spraying powder core wire material - Google Patents
High chromium aluminum type high wear resistant arc spraying powder core wire material Download PDFInfo
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- CN101497977A CN101497977A CNA2008100066605A CN200810006660A CN101497977A CN 101497977 A CN101497977 A CN 101497977A CN A2008100066605 A CNA2008100066605 A CN A2008100066605A CN 200810006660 A CN200810006660 A CN 200810006660A CN 101497977 A CN101497977 A CN 101497977A
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Abstract
The invention relates to a high-hardness high-wear-resistant metallic composite electric arc spraying powder core wire which belongs to abrasion-resistance electric arc spraying powder cored wires used for the surface protection of metal materials. The high-hardness high wear-resistant metal composite electric arc spraying powder core wire belongs to the field of hot spraying in material processing engineering, is mainly used for the corrosion prevention and the abrasion resistance of a heating surface of a boiler in an electric power plant and has low cost. The high-hardness high wear-resistant metal composite electric arc spraying powder cored wire is characterized by comprising the powder core components according to percentages by weight of 28-30 percent of crome metal, 5.0-10 percent of metallic aluminum, 0.5-1.5 percent of silicon, 1.0-3.0 percent of carbon, 0.5-2.0 percent of rare-earth, and the rest is metallic iron. A metallic composite coating prepared by the high-hardness high-wear-resistant metallic composite electric arc spraying powder core wire contains a compact chromic oxide film which has favorable high-temperature oxidation resisting property as well as corrosion resisting and abrasion resisting properties, good thermal conduction, high bonding strength, as high as 870 DEG C of working temperature, HV<0.1>500-550 of microhardness range and more than 50MPa of bonding strength. A preparation method of the high-hardness high-wear-resistant metallic composite electric arc spraying powder core wire adopts the prior processes of firstly rolling a low-carbon cold-rolled strip into a U shape, adding powder core powders which account for 30-40 percent of the gross weight of spraying wires into the U-shaped groove, closing the U-shaped groove and wrapping the powder cores in the U-shaped groove, drawing gradually and lightening through a wire-drawing die to lead the diameter to reach 3.0mm.
Description
Technical field
A kind of high-hardness, wearable metal composite arc spraying powder core wire material belongs to the anti-wear-resistant arc spraying cored wires of a kind of metal material surface protection.The invention belongs to the field of thermal spray in the Materials Processing Engineering, it is wear-resisting to be mainly used in the corrosion protection of boiler of power plant heating surface, and cost is low.
Background technology
When many device systems of heat energy and petrochemical industry moved, it was inner because the existence of high temperature gas flow is arranged, and makes and not only contains a large amount of H in the equipment
2S, SO
2Deng corrosive medium, and also carry a large amount of fine particle (as catalyzer, coal dust etc.) in the air-flow.When this class etchant gas and particulate mixture at high temperature pass through device systems with very high speed, can produce serious erosive wear to many component.
In the heat energy power-generating engineering, boiler water-wall tube high temperature corrosion and wearing and tearing are the ubiquitous serious problems of power system always, and directly harm has 2 aspects:
(1) make the tube wall attenuate, general according to statistics annual attenuate amount is about 1mm, and the serious 5～6mm/a that reaches forms the serious hidden danger of safe operation, has increased the provisional inspection and the turnover job amount of power plant, causes very big financial loss to power plant.
(2) the sudden pipe explosion accident of water wall takes place, cause urgent blowing out repairing, the normal power generation order of not only having upset power plant, reduce the generating output value, and increased labor strength and extra recondition expense, and directly influence the performance of enterprises, also disturbed the normal consistency of area power grid simultaneously, influence local industrial and agricultural production, also caused very big social influence thus.In the boiler running process,, at high temperature water wall is constituted corrosion owing to the existence of sulphur in the coal combustion and other detrimental impurity.This phenomenon is ubiquity in each coal firing boiler, just the degree difference.Generating general factory beans dam, Yibin power plant, because its coal-fired sulphur content is big, the high temperature corrosion especially severe that water wall suffers, the booster, the replace tubes that bring are thus suffered heavy losses.Therefore, need seek a kind of water wall anti-attrition technological method against corrosion that improves, to prolong the work-ing life of water wall.
The Fe-Al composition metal is a kind of material with compound property.The proportion of this class material is little, specific tenacity is high, wear resisting property, resistance to high temperature oxidation and corrosion resistance and good, because the main raw material(s) of this material is a key industry element technology commonly used in iron and two kinds of industry of aluminium, so it is with low cost, be fit to very much engineering and use, therefore the high-temperature structural material as future has a series of potential performance advantages.
Since the mid-80, the Materials science worker successively adopts alloying, hot mechanical treatment and process for treating surface both at home and abroad, has successfully improved the temperature-room type plasticity of Fe-Al composition metal, thereby has promoted its practicalization greatly.In addition, in the Fe-Al alloy, add chromium metal, can also be on the basis of original composition metal the wear-corrosion resistance of strongthener, make material adapt to the Working environment of a series of commercial plants such as boiler water wall more, alleviate the industrial maintenance burden, improve engineering efficient.
Summary of the invention
Problem to be solved by this invention is: the arc spraying coating with the present invention preparation is wear-resistant, resistance to high temperature oxidation, corrosion resistance are compared with the tube wall surface that does not spray this product, its performance is significantly improved, solve boiler of power plant heating surface high temperature oxidation and corrosion and particle erosive wear problem, the safe operation of guaranteeing to refine boiler of power plant.
Wear-resistant, resistance to high temperature oxidation arc spraying powder core wire material provided by the present invention is characterized in that described powder cored filament material crust is the low-carbon cold rolling steel band, and described powder cored filament material medicinal powder composition quality percentage composition scope is as follows:
Chromium metal: 28～30%; Metallic aluminium: 5.0～10%; Silicon: 0.5-1.5%; Carbon: 1.0～3.0%; Rare earth: 0.5～2.0%; Surplus: metallic iron.
Wherein each component effect is as follows:
Chromium metal: increase the solidity to corrosion of coating, generate Cr
2O
3Supercoat, Cr
2O
3Generation can reduce activity in the salt, the fusion of inhibited oxidation nickel alkalescence is unlikely again acid fusion takes place.
Metallic aluminium: have good corrosion resistance nature, can improve the hardness and the abrasion resistance properties of coating simultaneously, can form intermetallic compound with metallic iron simultaneously, play the molten admittedly effect of strengthening.
Silicon: generate SiO under the hot conditions
2, desoxydatoin is effectively avoided the intrusion of oxygen.
Carbon: form carbide with other metals, improve the hardness and the wear resisting property of coating.
Rare earth: can improve wear-resisting, corrosion-resistant, the antioxidant property of coating and the heat performance of shaking.
Metallic iron: can be used as plasticity and play bonding hard phase mutually, also can form the effect that intermetallic compound plays strengthened coat simultaneously with other metals.
Preparation method of the present invention adopts prior art, may further comprise the steps:
1, the low-carbon cold rolling steel band is rolled into U-shaped, in U-lag, add 39～45% the powder core powder of the present invention account for Spray Wire gross weight of the present invention again;
2, U-lag is healed up, make powder core parcel wherein,,, make its diameter reach 3.0mm at last and obtain the finished product by road drawing, tube reducing by wortle.
Use the present invention's processing parameter during according to electric arc spraying of the prior art on through the metallic matrix after the sandblast alligatoring to spray, the arc spraying coating for preparing has good resistance to high temperature oxidation, resistance to high temperature corrosion-abrasion performance.Adopt the coating of arc spraying technology in the serious place spraying the present invention preparation of boiler surface corrosive wear, move blowing out light maintenance in a year, the pipeline not damaged has solved high temperature oxidation and corrosion and granule impact wear problems in the engineering use.
Description of drawings
Fig. 1: flux-cored wire forming technology synoptic diagram.
Fig. 2: sprayed coating high temperature oxidation resistance
Embodiment
All embodiment spraying wires adopt the preparation of powder cored filament material shaper:
1. select the low-carbon cold rolling steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get chromium metal powder 280 grams, metallic aluminium powder 50 grams, silicon 5 grams, carbon 10 grams, rare earth 5 grams, metallic iron 650 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed powder is added in the low-carbon cold rolling steel band groove of U-shaped, filling ratio is 30%.U-lag is healed up, makes medicinal powder parcel wherein, again through wortle gradually tube reducing make its diameter reach 3.0mm.On through the metallic matrix after the sandblast alligatoring, prepare arc spraying coating, spraying current 150～180A, spray voltage 30～32V, spraying air pressure 0.55MP, spray distance 150mm.The sprayed coating high temperature oxidation resistance sees that Fig. 2, microhardness relative wear resistance see Table 1.
2. select the low-carbon cold rolling steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get chromium metal powder 290 grams, metallic aluminium powder 60 grams, silicon 10 grams, carbon 20 grams, rare earth 10 grams, metallic iron 610 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed powder is added in the low-carbon cold rolling steel band groove of U-shaped, filling ratio is 35%.U-lag is healed up, makes medicinal powder parcel wherein, again through wortle gradually tube reducing make its diameter reach 3.0mm.On through the metallic matrix after the sandblast alligatoring, prepare arc spraying coating, spraying current 150～180A, spray voltage 30～32V, spraying air pressure 0.6MP, spray distance 100mm.The sprayed coating high temperature oxidation resistance sees that Fig. 2, microhardness relative wear resistance see Table 1.
3. select the low-carbon cold rolling steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get chromium metal powder 290 grams, metallic aluminium powder 70 grams, silicon 15 grams, carbon 20 grams, rare earth 15 grams, metallic iron 590 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed powder is added in the low-carbon cold rolling steel band groove of U-shaped, filling ratio is 40%.U-lag is healed up, makes medicinal powder parcel wherein, again through wortle gradually tube reducing make its diameter reach 3.0mm.On through the metallic matrix after the sandblast alligatoring, prepare arc spraying coating, spraying current 150～180A, spray voltage 30～32V, spraying air pressure 0.55MP, spray distance 200mm.The sprayed coating high temperature oxidation resistance sees that Fig. 2, microhardness relative wear resistance see Table 1.
4. select the low-carbon cold rolling steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get chromium metal powder 300 grams, metallic aluminium powder 80 grams, silicon 10 grams, carbon 25 grams, rare earth 15 grams, metallic iron 570 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed powder is added in the low-carbon cold rolling steel band groove of U-shaped, filling ratio is 40%.U-lag is healed up, makes medicinal powder parcel wherein, again through wortle gradually tube reducing make its diameter reach 3.0mm.On through the metallic matrix after the sandblast alligatoring, prepare arc spraying coating, spraying current 150～180A, spray voltage 30～32V, spraying air pressure 0.6MP, spray distance 200mm.The sprayed coating high temperature oxidation resistance sees that Fig. 2, microhardness relative wear resistance see Table 1.
Hardness that table 1 is beaten all adopts the digital microhardness tester of HXD-1000, and load is 100g, and loading time 15s gets at 10 to sprayed coating and beats hardness, obtains the average microhardness value of this coating at last.
The erosion experiment adopts the normal temperature erosion experimental machine of trial-production to carry out, and the specimen size of each embodiment is 57 * 57 * 6mm, and experiment adopts pressurized air to make accelerating gas.Nozzle diameter is 10mm, and jet hole is 100mm to the distance at specimen surface center.Compressed air pressure is 0.6MPa, and flow is 800～850g/min, and the erosion time is 6min.16 purpose corundum sands are the erosion abrasive material, and the erosion angle can change between 30 ° to 90 °, and the erosive wear performance of coating is represented with the erosion rate.The erosion rate is meant the quality that sample lost after unit abrasive material erosion, during experiment with the Q235 steel as a comparison, contrast piece weight loss and measuring piece weight loss liken relative wear resistance to into this compound coating.Relative erosion-wear-resisting:
Coating resistance to high temperature oxidation test sample matrix is the Q235 steel, is of a size of the cylindrical sample of 20mm * Φ 10mm, earlier each surface of sample is cleaned and sandblasting, sprays coat-thickness 0.4～0.5mm then.Get some crucibles 800 ℃ move back gas disposal after, itself and original test specimen are weighed together, write down this value.Then crucible and test specimen are placed in the boiler, 650 ℃ of heating 400 hours, whenever putting for some time takes out sample, the quality of sample and crucible under the survey record after the cool to room temperature, and the weightening finish of calculating the sample per surface area, what mass measurement was adopted is the BS224S electronic balance that Beijing Sai Duolisi instrument company produces, and is accurate to 0.0001g.
With shown in Figure 1, the arc spraying coating high temperature oxidation resistance of being developed is good as table 1, and the hardness height can satisfy the industrial and mineral requirement of revolving furnace fume hood operation.
Table 1
| The coating sequence number | Hardness (HV 0.1) | Relative wear resistance (ε) |
| 1 | 1655 | 5.3 |
| 2 | 1736 | 6.5 |
| 3 | 1778 | 7.2 |
| 4 | 1794 | 7.8 |
| Q235 | 230.5 | 1 |
Claims (1)
1, a kind of high-hardness, wearable metal composite arc spraying powder core wire material is characterized in that, uses to contain fine and close chromium oxide film in the resulting coating of this product, has good corrosion resistance.Described powder cored filament material crust is a low-carbon cold rolling steel band steel band, and described powder cored filament material medicinal powder composition quality percentage composition scope is as follows:
Chromium metal: 28～30%; Metallic aluminium: 5.0～10%; Silicon: 0.5-1.5%; Carbon: 1.0～3.0%; Rare earth: 0.5～2.0%; Surplus: metallic iron.
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|---|---|---|---|
| CNA2008100066605A CN101497977A (en) | 2008-01-31 | 2008-01-31 | High chromium aluminum type high wear resistant arc spraying powder core wire material |
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|---|---|---|---|
| CNA2008100066605A CN101497977A (en) | 2008-01-31 | 2008-01-31 | High chromium aluminum type high wear resistant arc spraying powder core wire material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206797A (en) * | 2011-04-29 | 2011-10-05 | 中国人民解放军装甲兵工程学院 | Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof |
| CN103614685A (en) * | 2013-11-17 | 2014-03-05 | 中国人民解放军装甲兵工程学院 | Automatic double-wire electric arc spraying engine body remanufacturing method |
| CN106103804A (en) * | 2014-03-11 | 2016-11-09 | 戴姆勒股份公司 | The brake disc coating being made up of iron alloy composition and manufacture method thereof |
| CN106191738A (en) * | 2016-07-14 | 2016-12-07 | 曲作鹏 | Powder cored filament material and preparation thereof for the preparation high abrasion coating containing amorphous phase |
| CN109266995A (en) * | 2018-08-15 | 2019-01-25 | 江苏启迪合金有限公司 | It is a kind of width temperature range under the preparation method of anti scuffing ceramics/amorphous core silk and coating |
-
2008
- 2008-01-31 CN CNA2008100066605A patent/CN101497977A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206797A (en) * | 2011-04-29 | 2011-10-05 | 中国人民解放军装甲兵工程学院 | Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof |
| CN102206797B (en) * | 2011-04-29 | 2013-04-03 | 中国人民解放军装甲兵工程学院 | Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof |
| CN103614685A (en) * | 2013-11-17 | 2014-03-05 | 中国人民解放军装甲兵工程学院 | Automatic double-wire electric arc spraying engine body remanufacturing method |
| CN103614685B (en) * | 2013-11-17 | 2016-01-20 | 中国人民解放军装甲兵工程学院 | A kind of automatization twin wire arc spray engine body reproducing method |
| CN106103804A (en) * | 2014-03-11 | 2016-11-09 | 戴姆勒股份公司 | The brake disc coating being made up of iron alloy composition and manufacture method thereof |
| US10288136B2 (en) | 2014-03-11 | 2019-05-14 | Daimler Ag | Brake disc coating made from an iron alloy composition and method for the production thereof |
| CN106191738A (en) * | 2016-07-14 | 2016-12-07 | 曲作鹏 | Powder cored filament material and preparation thereof for the preparation high abrasion coating containing amorphous phase |
| CN109266995A (en) * | 2018-08-15 | 2019-01-25 | 江苏启迪合金有限公司 | It is a kind of width temperature range under the preparation method of anti scuffing ceramics/amorphous core silk and coating |
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Open date: 20090805 |