CN1134986A - Method for mfg. roller sleeve of medium speed milling machine - Google Patents
Method for mfg. roller sleeve of medium speed milling machine Download PDFInfo
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- CN1134986A CN1134986A CN 94103404 CN94103404A CN1134986A CN 1134986 A CN1134986 A CN 1134986A CN 94103404 CN94103404 CN 94103404 CN 94103404 A CN94103404 A CN 94103404A CN 1134986 A CN1134986 A CN 1134986A
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- roller shell
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Abstract
In order to extend the service life of roller jacket of a medium velocity grinder, copper drilling material is used, hard alloy granules are inlaid on the circumferential surface of the roller jacket which is made from ordinary material, therefore, hard but not brittle and wear resisting layer is formed. Under the combined action of hard alloy and tough alloy, the wearability is raised 10 times than the ordinary hard nicked No.4 cast iron roller jacket.
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, 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 hour, 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, and the present invention has adopted following technical solution: the roller shell parent combined alloy wearing layer on its external peripheral surface edge pricker that will manufacture with Normal Steel Casting.This combined alloy is to be made of copper base solder and Wimet, and Wimet is granular, the edge method of moving of described roller shell wearing layer comprises with the bottom rapid: at first, when manufacturing the roller shell parent, just make a die cavity overcoat at its external peripheral surface, then granular Wimet is filled in the die cavity of above-mentioned roller shell equably with identical materials; Place copper base solder at die cavity filler place, and place reductibility gas to divide the 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 that soaks into phase is played the shielding protection effect,, also given full play to the abrasion resistance properties that itself had simultaneously as attrition resistant hard alloy particle 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 has 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 is 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 the 20-100 order; The alloy ingredient of copper base solder is: content is at the manganese of 17-29%, the nickel of 18-30%, the silicon of 0.2-0.8% 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: manufacture the die cavity overcoat 5 of roller shell parent 1 and external peripheral surface thereof (as Fig. 3 with identical materials, 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 as in die cavity even filling high-abrasive material.Granular Wimet 4 is inserted in the die cavity along die cavity mouth 6,, can be adopted vibration or alternate manner to realize in order to guarantee filling evenly, 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, place reductibility gas to divide the stove internal heating its roller shell integral body then, 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.Can adopt the method for mechanical workout 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 18kg/mm
2, self intensity is greater than 40kg/mm
3Under 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 the combined alloy wearing layer that a kind of rigid toughness haves both at the same time also greater than HRC40.Thereby given full play to the wear resisting property that the Wimet WC particle is had, so 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 wearing layer 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 (10)
1. a roller shell that is used for the middling speed grinding machine comprises the roller shell parent, it is characterized in that, is provided with the combined alloy wearing layer on the external peripheral surface of roller shell parent.
2. roller shell as claimed in claim 1 is characterized in that said combined alloy wearing layer is to be made of copper base solder and Wimet.
3. roller shell as claimed in claim 2 is characterized in that the alloy ingredient of above-mentioned copper base solder is the manganese of content at 17-29%, the nickel of 18-30%, the silicon of 0.2-0.8% and the copper of shared remaining proportion.
4. roller shell as claimed in claim 2 is characterized in that described Wimet is a wolfram varbide.
5. as claim 2 or 4 described roller shells, it is characterized in that above-mentioned Wimet is the particle of granularity in 100-20 order scope.
6. method that is used to make roller shell as claimed in claim 1:
A) the die cavity overcoat of manufacturing roller shell parent and external peripheral surface thereof,
B) granular Wimet is filled in the die cavity of above-mentioned roller shell equably;
C) place copper base solder in the filler place, and place reductibility gas to divide the stove internal heating to make the solder fusing its integral body;
D) wait to flow into solder in the die cavity and make wherein hard alloy particle and roller shell parent mortise after, 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.
7. roller shell manufacture method as claimed in claim 6 is characterized in that, the distance between described roller shell parent and its die cavity overcoat is at least 3mm.
8. roller shell manufacture method as claimed in claim 6 is characterized in that, the pine of the hard alloy particle that loads dress ratio is greater than 9g/cm in the roller shell die cavity
3
9. roller shell manufacture method as claimed in claim 6 is characterized in that, manufactures roller shell parent and die cavity overcoat thereof with cast steel.
10. roller shell making method as claimed in claim 6 is characterized in that, removes the die cavity overcoat with the method for mechanical workout.
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 true CN1134986A (en) | 1996-11-06 |
| CN1039833C 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) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148651A (en) * | 2014-08-25 | 2014-11-19 | 南通高欣耐磨科技股份有限公司 | Method for manufacturing TiC hard alloy composite grinding roller |
| CN104889367A (en) * | 2015-04-29 | 2015-09-09 | 河北泰铭投资集团有限公司 | Compositely-cast ceramic cement vertical mill roller sleeve and manufacturing method |
| CN106232236A (en) * | 2014-04-22 | 2016-12-14 | 马格奥托马蒂克公司 | The guide reel of the feed roller pair of prilling granulator |
| 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 |
Family Cites Families (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 |
-
1994
- 1994-04-06 CN CN94103404A patent/CN1039833C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106232236A (en) * | 2014-04-22 | 2016-12-14 | 马格奥托马蒂克公司 | The guide reel of the feed roller pair of prilling granulator |
| CN106232236B (en) * | 2014-04-22 | 2019-08-02 | 马格奥托马蒂克公司 | The guide reel of the feed roller pair of prilling granulator |
| CN104148651A (en) * | 2014-08-25 | 2014-11-19 | 南通高欣耐磨科技股份有限公司 | Method for manufacturing TiC hard alloy composite grinding roller |
| CN104889367A (en) * | 2015-04-29 | 2015-09-09 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039833C (en) | 1998-09-16 |
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