CN102366860B - Hardfacing powder-cored solder wire for grinding roller of medium speed coal pulverizer and preparation method as well as surfacing method of hardfacing powder-cored wire - Google Patents
Hardfacing powder-cored solder wire for grinding roller of medium speed coal pulverizer and preparation method as well as surfacing method of hardfacing powder-cored wire Download PDFInfo
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- CN102366860B CN102366860B CN 201110303169 CN201110303169A CN102366860B CN 102366860 B CN102366860 B CN 102366860B CN 201110303169 CN201110303169 CN 201110303169 CN 201110303169 A CN201110303169 A CN 201110303169A CN 102366860 B CN102366860 B CN 102366860B
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- 238000000227 grinding Methods 0.000 title claims abstract description 39
- 238000005552 hardfacing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003245 coal Substances 0.000 title abstract description 3
- 229910000679 solder Inorganic materials 0.000 title description 2
- 238000003466 welding Methods 0.000 claims abstract description 52
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000011812 mixed powder Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000004907 flux Effects 0.000 claims description 39
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 238000005498 polishing Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 235000013312 flour Nutrition 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000005491 wire drawing Methods 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 2
- 150000002910 rare earth metals Chemical class 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 239000011863 silicon-based powder Substances 0.000 abstract 1
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Abstract
The invention discloses a hardfacing powder-cored wire for grinding roller of medium speed coal pulverizer and a preparation method as well as a surfacing method of the hardfacing powder-cored wire. A powder core is coated by a metal belt and the coated powder core is drawn and reduced to obtain the powder-cored wire. The powder core consists of the mixed powder with the following mass ratios: 3.0-4.5% of carbon powder, 1.0-2.0% of silicon powder, 0.5-1.0% of manganese powder, 16.0-20.0% of chromium powder, 0.5-1.5% of molybdenum powder, 1.0-2.0% of tungsten powder, 2.0-4.0% of titanium powder, 0-2.0% of vanadium powder, 5.0-7.0% of niobium powder and the balance of iron powder. The mass percent of the powder core in the powder-cored wire is 30 to 40%. The powder-cored wire provided by the invention can be used for directly surfacing by a visible arc; a rare-earth component of the powder-cored wire can be effectively used for refining deposited metal grains so that the bond strength is increased and the formability is improved. A wear-resistant layer which is formed by surfacing the powder-cored wire provided by the invention has the characteristics of large bond strength with matrixes, good welding formability and high wear resistance.
Description
Technical field
The present invention relates to a kind of welding material, particularly a kind of medium-speed pulverizer grinding roller hardfacing belongs to the high-abrasive material technical field with flux cored wire and preparation method thereof and overlaying method.
Background technology
Medium-speed pulverizer is widely used in thermal power plant, mine, cement plant and prepares coal dust fuel.Coal dust fuel doping hardness of matter causes the wearing and tearing of coal pulverizer grinding roller violent, causes service life short, and the comprehensive resources waste is serious.Usually the medium-speed pulverizer grinding roller is formed by rich chromium cast iron and steel alloy casting, if cast replacing again because of the grinding roller wear out failure, certainly will cause great waste, and improve production cost widely.Many medium-speed pulverizer grinding rollers adopt the build-up wear-resistant coating technology to resist wearing and tearing for this reason, thereby prolong the service life of parts, improve equipment operating efficiency, reduce integrated cost, belong to the energy-saving and emission-reduction field.
The medium-speed pulverizer grinding roller adopts the build-up wear-resistant coating technology, is the abrasion-resistant powder core welding wire built-up welding is formed wear-resistant coating on grinding roller roller shell surface.Roller shell is compared with the new product cast member after the built-up welding because wearing layer hardness is higher, than the grinding roller of not built-up welding scuff-resistant coating can more effectively resist abrasive wear, thereby have than the much better than wearability of built-up welding grinding roller not.Built-up welding grinding roller performance quality depends on following three aspects:
1. the bond strength of wearing layer and roller shell matrix
Because surfacing welding wire and matrix component difference are big, guarantee that its high bond strength is quite difficult, but also be necessary that if solder joints intensity is low, then wearing layer and mother metal can be peeled off, wearability is lost immediately.
2. the welding fabrication performance of wearing layer
Because the input of the heat during welding is big, splashing of non gas shielded welding is serious, and flux cored wire protection poor effect can cause wearing layer many pores to occur, so it is extremely important how to obtain welding bead moulding product attractive in appearance.
3. the abrasion resistance of wearing layer
Grinding roller roller shell mother metal is generally rich chromium cast iron, and welding performance is lower, and how to improve build-up wear-resistant layer abrasion resistance under the condition that guarantees reliable solderability is the direction of industry development.
Summary of the invention
The objective of the invention is to: a kind of medium-speed pulverizer grinding roller hardfacing flux cored wire and preparation method thereof and overlaying method are provided.Flux cored wire provided by the present invention contains multiple hard phase, and the wearing layer that its built-up welding is formed has the characteristics that bond strength is big, the welding fabrication performance is good, abrasion resistance is high with matrix.
Technical scheme of the present invention: a kind of medium-speed pulverizer grinding roller hardfacing flux cored wire, made through drawing, tube reducing by metal tape parcel powder core, described powder core is made up of the mixed-powder of following mass percent: the titanium valve of the molybdenum powder of the manganese powder of the carbon dust of 3.0%-4.5%, the silica flour of 1.0%-2.0%, 0.5%-1.0%, the chromium powder of 16.0%-20.0%, 0.5%-1.5%, the tungsten powder of 1.0%-2.0%, 2.0%-4.0%, the vanadium powder of 0-2.0%, the niobium powder of 5.0%-7.0%, surplus are iron powder; The quality percentage composition of described mixed-powder in flux cored wire is 30%-40%.
The aforementioned metal band is preferably nickel strap.Adopt the benefit of nickel strap to be: the wear-resistant coating performance that welding wire cladding performance and built-up welding form is better.
Used nickel strap thickness is 0.28mm.Through calculating and the technological experiment checking welding wire skin thickness the best of selecting for use the thick nickel strap of 0.28mm to roll out, and cladding composition proportion balance.
The diameter of aforementioned flux cored wire is 3.2mm or 2.8mm.3.2mm, 2.8mm is the standard component size of welding profession, thereby the welding gun that this flux cored wire can direct supporting welding equipment effectively reduces the supporting cost of follow-up use.
The hardfacing of medium-speed pulverizer grinding roller is with the preparation method of flux cored wire as mentioned above: take by weighing various powder in described ratio, put into the steel ball grinder mixed grinding 4-6 hour, mixing the back is the metal tape parcel mixed-powder of 0.28mm with thickness,, wire drawing unit drawing rolling through make-up machine, milling drum grinding, polishing unit polishing operation are made the flux cored wire that diameter is 3.2mm or 2.8mm, and can be utilized welding wire reel machine that welding wire is rolled into plate-like.
Welding wire specification with method for preparing meets the welding standard size, become the method for wearing layer to be its built-up welding: to adopt the open arc overlaying method that described flux cored wire built-up welding is formed wearing layer at the grinding roller working face of polishing, welding current 180-200A, weldingvoltage 25-32V, 3 layers of built-up welding or 6-7mm thickness get final product continuously.
Compared with prior art, the invention provides a kind of built-up welding flux cored wire that contains multiple hard phase, the direct built-up welding of available open arc, powder core silk middle rare earth composition is refinement deposited metal crystal grain effectively, increases bond strength, improves processability; And adopt nickel strap as the flux cored wire crust, welding wire forms the nickel-base composite material that strengthens with carbide particle after built-up welding, and it is wearable overlay that its compression strength, fracture toughness are significantly higher than iron-based Fe-Cr-C; Thereby having with the bond strength of matrix greatly with the wearing layer that flux cored wire built-up welding of the present invention forms, the welding fabrication performance is good, the characteristics that abrasion resistance is high.
The specific embodiment
Embodiment 1: the hardfacing of medium-speed pulverizer grinding roller is with the preparation of flux cored wire: take by weighing various powder by following mass percent example: carbon dust 4.0%, silica flour 1.5%, manganese powder 1.0%, chromium powder 18.0%, molybdenum powder 1.0%, tungsten powder 1.5%, titanium valve 3.0%, vanadium powder 1.0%, niobium powder 6.0%, iron powder 1.5%, put into the steel ball grinder mixed grinding 5 hours (the powder core of being made up of this mixed-powder is 38.5% at the quality percentage composition of flux cored wire), mix the back and with thickness be the nickel strap parcel mixed-powder of 0.28mm, rolling through make-up machine, the drawing of wire drawing unit, the milling drum grinding, polishing unit polishing operation is made the flux cored wire that diameter is 3.2mm.
Above-mentioned flux cored wire built-up welding becomes the method for wearing layer: adopt the open arc overlaying method that the flux cored wire built-up welding is formed wearing layer at the grinding roller working face of polishing, welding current 190A, weldingvoltage 28V, after 3 layers of the continuous built-up welding, wearing layer case hardness HRC63-66, abrasive wear behavior is 10 times of rich chromium cast iron, bond strength＞150MPa.
Embodiment 2: the hardfacing of medium-speed pulverizer grinding roller is with the preparation of flux cored wire: take by weighing various powder by following mass percent example: carbon dust 4.5%, silica flour 2.0%, manganese powder 1.0%, chromium powder 20.0%, molybdenum powder 1.5%, tungsten powder 2.0%, titanium valve 2.0%, vanadium powder 2.0%, niobium powder 5.0%, put into the steel ball grinder mixed grinding 4 hours (the powder core of being made up of this mixed-powder is 40% at the quality percentage composition of flux cored wire), mix the back and with thickness be the nickel strap parcel mixed-powder of 0.28mm, rolling through make-up machine, the drawing of wire drawing unit, the milling drum grinding, polishing unit polishing operation is made the flux cored wire that diameter is 2.8mm.
Above-mentioned flux cored wire built-up welding becomes the method for wearing layer: adopt the open arc overlaying method that the flux cored wire built-up welding is formed wearing layer at the grinding roller working face of polishing, welding current 180A, weldingvoltage 25V, continuously behind the built-up welding 6-7mm thickness, wearing layer case hardness HRC65-68, abrasive wear behavior is 10 times of rich chromium cast iron, bond strength＞150MPa.
Embodiment 3: the hardfacing of medium-speed pulverizer grinding roller is with the preparation of flux cored wire: take by weighing various powder by following mass percent example: carbon dust 3.0%, silica flour 1.0%, manganese powder 0.5%, chromium powder 16.0%, molybdenum powder 0.5%, tungsten powder 1.0%, titanium valve 4.0%, niobium powder 7.0%, iron powder 1%, put into the steel ball grinder mixed grinding 6 hours (the powder core of being made up of this mixed-powder is 34% at the quality percentage composition of flux cored wire), mix the back and with thickness be the metal tape parcel mixed-powder of 0.28mm, rolling through make-up machine, the wire drawing unit draws, the milling drum grinding, it is the flux cored wire of 3.2mm that polishing unit polishing operation draw becomes diameter.
Above-mentioned flux cored wire built-up welding becomes the method for wearing layer: adopt the open arc overlaying method that the flux cored wire built-up welding is formed wearing layer at the grinding roller working face of polishing, welding current 200A, weldingvoltage 32V, continuously behind the built-up welding 6-7mm thickness, wearing layer case hardness HRC65-68, abrasive wear behavior is 10 times of rich chromium cast iron, bond strength＞150MPa.
Claims (5)
1. medium-speed pulverizer grinding roller hardfacing flux cored wire, made through drawing, tube reducing by metal tape parcel powder core, it is characterized in that: described powder core is made up of the mixed-powder of following mass percent: the titanium valve of the molybdenum powder of the manganese powder of the carbon dust of 3.0%-4.5%, the silica flour of 1.0%-2.0%, 0.5%-1.0%, the chromium powder of 16.0%-20.0%, 0.5%-1.5%, the tungsten powder of 1.0%-2.0%, 2.0%-4.0%, the vanadium powder of 0-2.0%, the niobium powder of 5.0%-7.0%, surplus are iron powder; The quality percentage composition of described mixed-powder in flux cored wire is 30%-40%; Described metal tape is nickel strap.
2. medium-speed pulverizer grinding roller hardfacing flux cored wire according to claim 1, it is characterized in that: used nickel strap thickness is 0.28mm.
3. medium-speed pulverizer grinding roller hardfacing flux cored wire according to claim 1, it is characterized in that: the diameter of flux cored wire is 3.2mm or 2.8mm.
As among the claim 1-3 as described in each hardfacing of medium-speed pulverizer grinding roller with the preparation method of flux cored wire, it is characterized in that: take by weighing various powder in described ratio, put into the steel ball grinder mixed grinding 4-6 hour, mixing the back is the metal tape parcel mixed-powder of 0.28mm with thickness, and, wire drawing unit drawing rolling through make-up machine, milling drum grinding, polishing unit polishing operation are made the flux cored wire that diameter is 3.2mm or 2.8mm.
5. each described flux cored wire built-up welding among the claim 1-3 is become the method for wearing layer, it is characterized in that: adopt the open arc overlaying method that described flux cored wire built-up welding is formed wearing layer at the grinding roller working face of polishing, welding current 180-200A, weldingvoltage 25-32V, 3 layers of built-up welding or 6-7mm thickness get final product continuously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110303169 CN102366860B (en) | 2011-10-09 | 2011-10-09 | Hardfacing powder-cored solder wire for grinding roller of medium speed coal pulverizer and preparation method as well as surfacing method of hardfacing powder-cored wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110303169 CN102366860B (en) | 2011-10-09 | 2011-10-09 | Hardfacing powder-cored solder wire for grinding roller of medium speed coal pulverizer and preparation method as well as surfacing method of hardfacing powder-cored wire |
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| Publication Number | Publication Date |
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| CN102366860A CN102366860A (en) | 2012-03-07 |
| CN102366860B true CN102366860B (en) | 2013-09-25 |
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Families Citing this family (9)
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| CN104043502B (en) * | 2013-03-13 | 2016-02-03 | 上海重型机器厂有限公司 | The overlaying-type roller shell of Raymond bowl mill and the segmentation overlaying method of roller shell overlay cladding thereof |
| CN104139251A (en) * | 2014-06-17 | 2014-11-12 | 铁岭灵飞重型机器有限公司 | Welding rod material used for alloy steel surfacing |
| CN104959747B (en) * | 2015-05-22 | 2017-05-31 | 宝志坚 | A kind of cermet welding wire and preparation method thereof |
| CN107236952A (en) * | 2017-06-15 | 2017-10-10 | 宝志坚 | A kind of laser melting coating nanometer metal ceramic grinding roller |
| CN108620766A (en) * | 2018-04-11 | 2018-10-09 | 丹阳市华龙特钢有限公司 | A kind of high-intensity and high-tenacity stainless steel arc welding flux cored wire and preparation method thereof |
| CN110102932B (en) * | 2019-03-21 | 2022-04-29 | 珠海弘德表面技术有限公司 | Ultrahigh-hardness and wear-resistant welding wire and preparation method thereof |
| CN110039253A (en) * | 2019-04-18 | 2019-07-23 | 大唐东北电力试验研究院有限公司 | A kind of middling speed roller surface restorative procedure preventing penetrating crack |
| CN110539101A (en) * | 2019-09-29 | 2019-12-06 | 鞍钢集团北京研究院有限公司 | Open arc self-protection flux-cored wire for continuous casting roller surfacing of fan-shaped section of continuous casting machine and manufacturing method thereof |
| CN110977248B (en) * | 2019-12-13 | 2021-09-28 | 郑州机械研究所有限公司 | Wear-resistant flux-cored composition, wear-resistant welding wire, and preparation method and application thereof |
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Effective date of registration: 20200628 Address after: 223001, room 7, building 83, 439 North Beijing Road, Qinghe District, Jiangsu, Huaian Patentee after: JIANGSU KEHUAN SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 223005 Foxconn Road, Huaian Economic Development Zone, Jiangsu 78, China Patentee before: JIANGSU KEHUAN NEW MATERIAL Co.,Ltd. |
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Effective date of registration: 20201218 Address after: No.78, Foxconn Road, Huaian Economic and Technological Development Zone, Jiangsu 223005 Patentee after: JIANGSU KEHUAN NEW MATERIAL Co.,Ltd. Address before: 223001 Room 439, Building 83, Beijing North Road, Qinghe District, Huaian City, Jiangsu Province Patentee before: JIANGSU KEHUAN SCIENCE AND TECHNOLOGY Co.,Ltd. |
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