CN1039833C - Method for mfg. roller sleeve of medium speed milling machine - Google Patents
Method for mfg. roller sleeve of medium speed milling machine Download PDFInfo
- Publication number
- CN1039833C CN1039833C CN94103404A CN94103404A CN1039833C CN 1039833 C CN1039833 C CN 1039833C CN 94103404 A CN94103404 A CN 94103404A CN 94103404 A CN94103404 A CN 94103404A CN 1039833 C CN1039833 C CN 1039833C
- Authority
- CN
- China
- Prior art keywords
- roller shell
- die cavity
- roll sleeve
- hard
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003801 milling Methods 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 claims abstract description 13
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims 1
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 10
- 229910000510 noble metal Inorganic materials 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical group [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
The present invention relates to a roll sleeve and a making method thereof for a medium speed mill. In order to improve the service life of a mill roll sleeve, hard alloy granules are inlaid on the surface of the outer circumference of a roll sleeve parent body which is made of common materials by using copper base solder so as to form a combination alloy antiwear layer which is hard but not friable. Due to the common action of hard alloy and tough alloy, the wear resistance of the roll sleeve of the present invention is enhanced for more than 10 times compared with that of the existing cast iron roll sleeve of nickel hard NO. IV at home and abroad. Thus, material consumption can be greatly reduced, and noble metal can be saved. At the same time, a price-life ratio is far lower than the original cast iron roll sleeve of nickel hard NO. IV, and thus, the roll sleeve of the present invention has great application and popularization values industrially, and economic benefit is considerable.
Description
The present invention is a kind of roller shell of middling speed grinding machine and the method that is used to make this roller shell.
Be widely used in MPS (MBF) and RP type middling speed grinding machine in fuel-burning power plant and the cement industry, roller shell wherein (grinding roller) is the main easy-abrasion part of this grinding machine.The roller shell of producing both at home and abroad mostly adopts hard IV cast iron of nickel or rich chromium cast iron (RP type grinding machine) material to manufacture at present, and its hardness is generally HRC50～67.With the fuel-burning power plant is example, and the effect of middling speed grinding machine is that coal is worn into coal dust, so claim coal pulverizer.Because the used coal-fired foreign matter content of power plants is more, the life-span that the roller shell of above-mentioned material moves in coal pulverizer is 6000～8000 hours, does not far reach the work-ing life that manufacturer arranged 13000 hours.The overhaul in general about 30,000 hours of the electricity generation boiler of thermal power plant, as the coal pulverizer of its subsidiary engine,, need usually change, overhaul because the vulnerable part life-span is short, directly have influence on the normal operation of boiler main frame, give and use the thermal power plant of this coal pulverizer to cause bigger financial loss.In addition, domestic and international electric power and cement industry, the consumption of annual grinding machine roller shell is very considerable, has not only expended a large amount of noble metals, and the while has also been strengthened working strength of workers because of the frequent maintenance of grinding machine.
The object of the present invention is to provide a kind of good abrasion resistance that has, and the permanent roller shell of working life.In order to achieve the above object, the present invention has adopted following technical solution: will inlay combined alloy wearing layer on pricker at its external peripheral surface with the roller shell parent that Normal Steel Casting is manufactured.This combined alloy is to be made of copper base solder and Wimet, and Wimet is granular.The edge pricker method of described roller shell wearing layer may further comprise the steps: at first, just make a die cavity overcoat with identical materials at its external peripheral surface when manufacturing the roller shell parent, then granular Wimet is filled in the die cavity of above-mentioned roller shell uniformly; Place copper base solder at die cavity filler place, and place reducing atmosphere stove internal heating to make the solder fusing its integral body.Solder after the fusing flows into die cavity, with hard alloy particle and roller shell parent mortise together, and formation one wearing layer in die cavity.Integral body is annealed and ageing treatment after breaking away from process furnace; Remove the die cavity overcoat at last, promptly finished roller shell and manufactured with combined alloy wearing layer.
Advantage of the present invention just is: utilize toughness preferably copper-based filler metal hard alloy particle is inlayed pricker on the surface easy to wear of roller shell parent, under the acting in conjunction of two kinds of alloys, formed a kind of crisp firmly and not combined alloy wearing layer.Wherein, the toughness alloy of invading the profit phase is played the shielding protection effect, as the hard alloy particle of wear-resisting phase, also given full play to the abrasion resistance properties that itself had simultaneously as the Wimet of wear-resisting phase.Therefore, the maximum hardness of this roller shell wearing layer can reach HRA94, and lowest hardness is also greater than HRC40.
The roller shell that adopts present method to manufacture, the bonding force between its roller shell parent and wearing layer is big, and self intensity height, and wear resisting property is good, thereby working life is permanent.
In addition, because roller shell making method of the present invention is simple, and the wear resistance than the domestic and international hard IV cast iron of present employed nickel roller shell has improved more than 10 times, thereby can reduce the materials consumption of roller shell greatly, save noble metal, also can reduce because of equipment often overhauls the financial loss that causes to power industry, also alleviate working strength of workers simultaneously.Main is that therefore the price of roller shell of the present invention/life-span reaches the tool application and popularization value than well below the hard IV cast iron of nickel roller shell.
Description of drawings of the present invention is as follows:
Fig. 1 is used for the roller shell of MPS (MBF) type grinding machine for the present invention;
Fig. 2 is used for the grinding roller of RP type grinding machine for the present invention;
Fig. 3 is the edge pricker processing synoptic diagram of Fig. 1 roller shell of the present invention;
Fig. 4 is the edge pricker processing synoptic diagram of Fig. 2 grinding roller of the present invention;
Below in conjunction with accompanying drawing technical solution of the present invention is described in further detail.
Referring to Fig. 1,2 the present invention are the external peripheral surface edge pricker one deck combined alloy wearing layer 2 at roller shell parent 1.This wearing layer 2 is to be made of copper base solder and Wimet.In the present embodiment, Wimet is a tungsten carbide particle, and its granularity is 20～100 orders; The alloying constituent of copper base solder is: content is at 17～29% manganese, 18～30% nickel, 0.2～0.8% silicon and the copper of shared remaining proportion.For aforesaid combination alloy wear-resisting layer being bonded in securely the external peripheral surface of roller shell parent.The present invention has adopted following method: the roller shell parent made from identical materials 1 and the die cavity overcoat 5 of external peripheral surface thereof are (as Fig. 3, shown in 4), described material is a cast steel, distance between roller shell parent 1 and the die cavity overcoat 5 should be less than 3mm, so that even filling high-abrasive material in die cavity, granular Wimet 4 is inserted in the die cavity along die cavity mouth 6, evenly can adopt vibration or alternate manner to realize in order to guarantee filling, the hard alloy particle 4 that is loaded in the while roller shell die cavity, its pine dress is than being at least 9g/cm
3Place copper base solder 3 in die cavity filler place, then its roller shell integral body is placed reducing atmosphere stove internal heating, make solder 3 fusings.Copper base solder after the fusing flows into die cavity, the hard alloy particle in the die cavity is bondd mutually, and bond together with roller shell parent 1 and die cavity overcoat 5 simultaneously.Behind the whole disengaging of the roller shell process furnace, anneal and ageing treatment.Adopt mach way to remove die cavity overcoat 5 at last, expose the combined alloy wearing layer of its external peripheral surface.
Test shows, the combined alloy wearing layer that forms with aforesaid method and the bonding force of roller shell parent are greater than 180N/mm
2, self intensity is greater than 400N/mm
2Under the acting in conjunction of Wimet and toughness alloy; this roller shell wearing layer demonstrates crisp firmly and not characteristic; promptly the Wimet as wear-resisting phase has played the shielding protection effect mutually to soaking into; its maximum hardness can reach HRA94; lowest hardness is also greater than HRC40; it is the combined alloy wearing layer that a kind of rigid toughness haves both at the same time; thereby given full play to the wear resisting property that the Wimet WC particle is had; therefore this roller shell is improving aspect the wear resistance more than 10 times than the present hard IV cast iron of domestic and international widely used nickel roller shell.
For example in April, 1993, (its roller shell parent material was ZG45 with roller shell of the present invention, combined alloy thickness is 11mm), (one is the hard IV cast iron of nickel roller shell with other two roller shells on the MPS190 type coal pulverizer of refreshing hair power plant, another is to do parent with Normal Steel Casting, and outside surface is with the roller shell of carbide electrode built-up welding) install and use the same period.Through about 3500 hours operation, in the same years 10 monthly repair find that wherein the wearing and tearing thickness of the hard IV cast iron of nickel roller shell is greater than 40mm, be worn through with the roller shell of carbide electrode built-up welding, and the wearing and tearing thickness of roller shell of the present invention is only less than 3mm.
Because roller shell of the present invention has good abrasion resistance, therefore long service life not only reduces the running cost of coal pulverizer greatly, and makes the turnaround of coal pulverizer and electricity generation boiler turnaround become possibility synchronously.Produce the loss that causes thereby reduced, also alleviated working strength of workers because of often keeping in repair influence.
Because roller shell parent of the present invention adopts Normal Steel Casting to manufacture, wearing layer thickness allows abrasion loss to determine according to roller shell, is generally 3～40mm.Thereby the price of roller shell of the present invention/life-span ratio is well below the hard IV cast iron of nickel roller shell.This promptly means if the grinding roller of the MPS of China's power industry (MBF) type and RP type grinding machine all adopts roller shell of the present invention, will save a large amount of noble metals for country, reduces materials consumption, and only this just can bring nearly hundred million yuan direct economic benefit every year to power industry.
Claims (2)
1 one kinds of roller shells that are used for the middling speed grinding machine comprise the roller shell parent, it is characterized in that, are provided with the combined alloy wearing layer that is made of copper-based filler metal and Wimet on the external peripheral surface of roller shell parent; The composition of described copper-based filler metal is a content at 17～29% manganese, 18～30% nickel, 0.2～0.8% the silicon and the copper of shared remaining proportion; Described Wimet is granular wolfram varbide, and its granularity is between 100～20 orders.
2 one kinds of methods that are used to make roller shell as claimed in claim 1:
A) make the die cavity overcoat of roller shell parent and external peripheral surface thereof, and make the roller shell mother
The die cavity gap that body and its die cavity overcoat form keeps 3mm at least;
B) granular Wimet is filled in equably the die cavity of above-mentioned roller shell
In, its pine dress ratio is greater than 9g/cm
3
C) place copper base solder in the filler place, and its integral body is placed reducing atmosphere
The stove internal heating makes the solder fusing;
D) wait to flow into solder in the die cavity and make wherein hard alloy particle and roller shell mother
After the body mortise, the disengaging process furnace is also annealed and ageing treatment;
E) remove the die cavity overcoat and expose wearing layer on the roller shell parent external peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103404A CN1039833C (en) | 1994-04-06 | 1994-04-06 | Method for mfg. roller sleeve of medium speed milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103404A CN1039833C (en) | 1994-04-06 | 1994-04-06 | Method for mfg. roller sleeve of medium speed milling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134986A CN1134986A (en) | 1996-11-06 |
| CN1039833C true CN1039833C (en) | 1998-09-16 |
Family
ID=5031057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94103404A Expired - Fee Related CN1039833C (en) | 1994-04-06 | 1994-04-06 | Method for mfg. roller sleeve of medium speed milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039833C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202014003409U1 (en) * | 2014-04-22 | 2014-04-30 | Automatik Plastics Machinery Gmbh | Guide roller of a feed roller pair of a granulator |
| CN104148651B (en) * | 2014-08-25 | 2016-04-13 | 南通高欣耐磨科技股份有限公司 | A kind of preparation method of TiC carbide alloy composite grinding roll |
| CN104889367B (en) * | 2015-04-29 | 2017-04-12 | 河北泰铭投资集团有限公司 | Compositely-cast ceramic cement vertical mill roller sleeve and manufacturing method |
| CN109957737A (en) * | 2017-12-22 | 2019-07-02 | 宜兴安纳西智能机械设备有限公司 | A kind of feed device roller case material |
| CN114210734A (en) * | 2021-11-05 | 2022-03-22 | 宝钢轧辊科技有限责任公司 | High-speed steel combined roller and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3925070A (en) * | 1974-04-24 | 1975-12-09 | Coast Metals Inc | Brazing alloy |
| US3928029A (en) * | 1974-02-27 | 1975-12-23 | Garrett Corp | Braze alloy system |
| US4015948A (en) * | 1974-01-04 | 1977-04-05 | Masatoshi Tsuda | Copper-base solder |
-
1994
- 1994-04-06 CN CN94103404A patent/CN1039833C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015948A (en) * | 1974-01-04 | 1977-04-05 | Masatoshi Tsuda | Copper-base solder |
| US3928029A (en) * | 1974-02-27 | 1975-12-23 | Garrett Corp | Braze alloy system |
| US3925070A (en) * | 1974-04-24 | 1975-12-09 | Coast Metals Inc | Brazing alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1134986A (en) | 1996-11-06 |
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| C14 | Grant of patent or utility model | ||
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Free format text: CORRECT: PATENTEE; FROM: HUADIAN ENERGY-SAVING TECH. POPULARIZATION SERVICE CENTER, DALIAN TO: BAO ZHIJIAN |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Bao Zhijian Patentee before: Huadian Energy-Saving Tech. Poularization Service Center, Dalian |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |