CN1843644A - Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same - Google Patents
Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same Download PDFInfo
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- CN1843644A CN1843644A CN 200610078660 CN200610078660A CN1843644A CN 1843644 A CN1843644 A CN 1843644A CN 200610078660 CN200610078660 CN 200610078660 CN 200610078660 A CN200610078660 A CN 200610078660A CN 1843644 A CN1843644 A CN 1843644A
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Abstract
The invention relates to a high-liner rigid alloy compound roll collar, which comprises a base and a compound working layer whose material brand is different to the base while they are sintered into one whole. The producing method comprises: filling the base and the rigid alloy powder of non-doping molding agent into graphite mould; via vibration, they are filled into special middle-frequency hydraulic vibrating sintering device to be thermally compressed and sintered; and processing second positive pressure sintering; checking the quality and grinding to attain the final product. The invention can improve the rigidity of working layer and the friction resistance; improve the rolling amount of roll collar and the service life, while the waste roll collar can be recycled to save metallic resource. It can apply the finisher of high-speed producing line whose rolling speed reaches 100m/s.
Description
Technical field
The present invention relates to a kind of mm finishing mill unit collars and manufacturing process thereof that is applicable on the high-speed wire rolling production line, belong to the hard alloy powder metallurgical technical field.
Background technology
Existing primary collars as shown in Figure 1, by applying unit according to produce needs leave on its collars cylindrical rolled wire with groove after, be installed in mm finishing mill unit (tens sorties) and go up in pairs and use.Aborning because high temperature, high speed and high pressure cause the collars wearing and tearing, collars will often roll off the production line reconditioning flute profile and external diameter, (reconditioning tens times, weight reduces about 30% when given size is arrived in its external diameter reconditioning.Continuous about 60 days of life-span) just roll off the production line and scrap, see accompanying drawing 2, the A among Fig. 2 partly represents the part of going through reconditioning loss repeatedly.Should be made up of two parts from visible 1 collars of job specification: 1, the loss part of going is a working lining, requires its hardness height, wearability is good, amount of rolling is big.The part of 2, scrapping is a matrix, requires its good toughness, intensity height, not cracked.
The collars that prior art is produced is that the conventional Hardmetal materials sintering by single composition forms, and is monolithic construction.Its manufacturing process is: the alloy powder mixes forming agent and fully mixes back → compression molding → isostatic cool pressing (pressure reaches 200MPa) → heating, vacuum removal forming agent → vacuum-sintering (about 100KW of power, be incubated about 90min) → high temperature insostatic pressing (HIP) (pressure 100MPa, the about 120KW of general power is incubated about 60min) → grinding → finished product.
Above-mentioned the deficiencies in the prior art part is: 1, an existing collars can only be with the alloy powder machine-shaping of the same composition trade mark, when its composition trade mark of design, intensity, the toughness reguirements of matrix have been satisfied, promptly at first broken roller do not occur in the assurance work, split phenomenons such as roller, just be difficult for guaranteeing the requirement of working lining hardness, wearability, although existing collars is the collars that different sorties have been produced the different trades mark, but because of above-mentioned reason, existing collars still can not strengthen the hardness of working lining and accomplish soft inside despite one's hard shell.2, the existing processes technology is because the limitation of process can not make the collars after scrapping realize regeneration.3, existing collars production technology more complicated, heating process is many, and briquetting pressure is very high, and temperature retention time is long, so energy consumption is higher.
Summary of the invention
The hardness, the wearability that have collars now and can not finely satisfy working lining require and existing manufacturing technique can not make the collars of scrapping realize the deficiency of regeneration in order to overcome, the objective of the invention is to: a kind of high line carbide alloy composite ring and manufacture method thereof are provided, this high line carbide alloy composite ring can be realized soft inside despite one's hard shell, promptly allow material hardness, density and the wearability of working lining be higher than matrix, thereby improve the amount of rolling and the service life of collars.This manufacture method can also make the collars of scrapping obtain composite regenerated utilization, saves a large amount of precious metals and energy consumption.
The technical solution adopted for the present invention to solve the technical problems is as follows:
A kind of high line carbide alloy composite ring has the rolled wire groove on the external circle of its collars.Described collars body is by working lining and matrix composite structure dimerous; The working lining and the matrix material trade mark are inequality.This working lining is an annular solid, is compounded on the cylindrical of matrix, and working lining and matrix are complex sintered to become one.The ring body size and the primary collars of described high line carbide alloy composite ring are measure-alike.
Described compound working lining can adopt hardness and density to be higher than that the conventional Hardmetal materials of 1-2 the trade mark of collars matrix and matrix are complex sintered to be one.
Described compound working lining can adopt the sub-micro of 0.5-1 μ m or be one less than the nanoscale hard alloy material of 0.5 μ m and matrix are complex sintered, the hardness of working lining and strength ratio collars matrix respectively high 100% and 60%.
Described composite ring matrix can obtain with intermediate frequency hydraulic vibration sintering and grinding technique method.Also can utilize the old collars of scrapping as the composite ring matrix.
A kind of process of making above-mentioned high line carbide alloy composite ring that is exclusively used in, this method comprises following processing step:
(1) the carbide alloy powder of not mixing forming agent of composite ring matrix and working lining is packed into simultaneously vibrate in the graphite jig, add a cover, compacting.The optional usefulness of carbide alloy powder is higher than the conventional carbide alloy powder of the matrix hardness and a density 1-2 trade mark, also can select better sub-micro of performance and nanoscale hard alloy material for use.The alloy powder will form the working lining and the grinding layer of composite ring.Purpose with the alloy powder of not mixing forming agent is and the matrix good combination, saves the operation that removes forming agent simultaneously, reduced again because of forming agent atarting material defective may.
(2) put into again that special-purpose intermediate frequency hydraulic vibration sintering machine heats up, pressurization, vibratory sintering, the temperature of this pressure vibration liquid-phase sintering operation is 1380 ℃, pressure 3MPa, temperature retention time 10 minutes makes working lining and matrix be sintered to one.
(3) after sintering is finished; treat that workpiece is cooled to below 600 ℃; take out workpiece; check the blank composite ring, putting into special-purpose resistance argon gas sintering furnace again after qualified carries out the liquid-phase sintering of secondary malleation, is warming up to 1300 ℃-1400 ℃; (according to the working layer different choice) is when reaching sintering temperature; pressure transfers to 8MPa, is incubated after 30 minutes, shuts down and cools off with stove.This operation is in order further to improve the density of blank composite ring, to eliminate the defectives such as hole that may exist in the collars material.
(4) when furnace temperature is lower than 400 ℃, the workpiece cooling of coming out of the stove is carried out grinding through pair roller plane of a loop, endoporus and cylindrical after the assay was approved, promptly makes high line carbide alloy composite ring.
Described composite ring matrix can obtain with intermediate frequency hydraulic vibration sintering and grinding technique method.Also can utilize the old collars of scrapping as matrix.
Body portion in the high line carbide alloy of the present invention composite ring can be obtained by following processing step:
(1) the conventional cemented carbide powder that will not mix the 2-4 μ m of forming agent pack into vibrate in the graphite jig, add a cover, compacting.Pressure 3MPa;
(2) carry out the liquid-phase sintering of intermediate frequency hydraulic vibration, temperature is 1380 ℃, and pressure 3MPa is incubated 60 minutes, comes out of the stove after the cooling;
(3) become body portion behind grinding plane, endoporus and the cylindrical.
The body portion of the high line carbide alloy of the present invention composite ring also can utilize the old collars of scrapping, and handles back and working lining through surface cleaning and carries out complex sinteredly, scraps collars and obtains regeneration thereby make.
The invention has the beneficial effects as follows:
1. double-layer combined structure, more scientific and reasonable, meet the collars job specification
Innovative point of the present invention is: 1. high line carbide alloy composite ring is a composite structure, is made up of working lining and matrix two parts.Working lining, the matrix of 2. high line carbide alloy composite ring is to be composited by composition, the different Hardmetal materials of the trade mark.3. a kind of process of making high line carbide alloy composite ring that is exclusively used in.Compare with the monoblock type collars that body portion is made up of composition, the identical material of the trade mark with the working lining of a collars of prior art, the present invention is divided into body portion and working lining part with existing whole collars from structure, and the material hardness of working lining and wearability all are higher than body portion, thereby can improve the amount of rolling and the service life of collars.Body portion guarantees again broken roller not to take place, split the roller phenomenon simultaneously, reaches soft inside despite one's hard shell effect.
2. the high line carbide alloy of the present invention composite ring has better serviceability
The high line carbide alloy composite ring that two kinds of different materials trades mark of the present invention constitute has better serviceability than the primary collars of the existing homogenous material trade mark, has more clear superiority, can improve amount of rolling more than 30%.Primary collars is the not broken roller of assurance, does not split roller, the general the highest 86HRA that can only reach of hardness, and density is up to 14.1g/cm
3And high line carbide alloy composite ring of the present invention is guaranteeing can to make working lining hardness reach 88HRA under the constant situation of body portion intensity, and density reaches 14.9g/m
3More than, thereby wearability is obviously improved.
3. the high line carbide alloy of the present invention composite ring has more superior material property
The working lining of the high line carbide alloy of the present invention composite ring can adopt sub-micro and nanoscale hard alloy, compares with the carbide alloy of the conventional trade mark to have higher hardness, wearability and intensity.Hardness can reach HV
301980, improve nearly one times.Intensity can reach 3700MPa, improves closely 60%, therefore has more superior material property, can obtain not having the microscopic structure of hole behind the sintering, should be the developing direction of collars from now on.
4. make a large amount of collars of scrapping of high line be able to regeneration, save a large amount of precious metal resources
The present invention can be with scrapping the body portion of collars as composite ring, thereby make a large amount of collars of scrapping obtain regeneration, can save a large amount of tungsten, cobalt class precious metal resource, compares with existing collars and can reduce manufacturing cost 30%.At present, China is online and have more than 100 approximately at the high-speed wire production line of building, and surplus the carbide roll ring scrapped of rolling off the production line every year reaches 26000, reaches 3.6 hundred million yuan by new collars value calculation.Scrap collars weight and reach about 450 tons, caused the waste of a large amount of tungsten, cobalt class precious metal resource.After adopting the technology of the present invention, can make these scrap the collars regeneration, can create about 2.5 hundred million yuan of the output value every year, 7,500 ten thousand yuan of profits taxes, surplus the newly-increased job 2000, can be high line manufacturing enterprise and save 1.1 hundred million yuan of collars spare part expenses, the noble metal of regeneration is worth and reaches 1.6 hundred million yuan.
5. technology of the present invention is simple, and it is low to consume energy
Technology of the present invention is simple, has saved operations such as compression molding, isostatic cool pressing and heating, drying forming agent.Used special equipment power is little, and sintering pressure is low, has only 1/25 of existing primary collars sintering pressure, and temperature retention time is short, has only 1/3 of primary collars, compares with primary collars production technology, can save with electric consumption more than 50%.Collars of every production, the about 400KWh of the comparable existing primary collars production technology economize on electricity of composite regenerated technology of the present invention, all to adopt the inventive method to carry out composite regenerated as if scrapping collars every year, and about 1,000 ten thousand KWh then can economize on electricity every year.Energy-saving effect is remarkable.
Description of drawings
Fig. 1 is existing primary collars longitudinal sectional view
Fig. 2 be to use roll off the production line after the size scrap the collars longitudinal sectional view
Fig. 3 is the longitudinal sectional view of the high line carbide alloy of the present invention composite ring
Fig. 4 is the manufacturing process flow diagram of the high line carbide alloy of the present invention composite ring
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples:
Figure 3 shows that an embodiment of the high line carbide alloy of the present invention composite ring, B represents compound working lining among the figure, and C represents the body portion of composite ring.Specification of workpieces is Φ 228.3mm, and it is 87HRA that working lining B adopts hardness, and density is 14.3/cm
3The Talide powder, and the Talide material hardness of collars matrix C is 85HRA, density 13.9g/cm
3Be sintered into one through combination process with this pair trade mark material, become the composite ring finished product through grinding again.For another example, specification of workpieces is Φ 168.66mm, and collars matrix tungsten carbide Hardmetal materials hardness is 85HRA, density 13.9g/cm
3, working lining Talide material hardness is 88HRA, density reaches 14.9g/cm
3, make the composite ring that working lining and matrix differ two trades mark through combination process, become the composite ring finished product through grinding again.
The embodiment of the high line carbide alloy of the present invention composite ring manufacture method is as follows: see also shown in Figure 4, present embodiment is to utilize the old collars after scrapping to be matrix, the Talide powder of handling the back and not mixing forming agent through the surface cleaning graphite jig of packing into simultaneously, the mould that powder is housed and scraps collars is added a cover the special-purpose power of together packing into after the vibration dress is real be in 100 kilowatts the intermediate frequency hydraulic vibration sintering machine, heat up, pressurization, Vibration Liquid Phase sintering, temperature rises to 1380 ℃, pressure 3MPa is incubated 10 minutes.After finishing, treats sintering that workpiece is cooled to below 600 ℃; take out workpiece; inspection is sintered to the blank collars of one, after the passed examination, puts into special-purpose resistance argon gas sintering furnace again; carry out the malleation liquid-phase sintering that secondary improves density; every stove is placed two, heats up then, pressurizes, when reaching sintering temperature 1400 ℃; pressure transfers to 8MPa, is incubated to shut down after 30 minutes to cool off with stove.When furnace temperature is lower than 400 ℃, the workpiece cooling of coming out of the stove.After the assay was approved, carry out milling drum processing.Endoporus, end face, cylindrical are ground to size and precision by drawing.After the passed examination, be composite regenerated collars.The present invention can make a collars obtain twice composite regenerated.
The present invention is applicable to that final rolling linear speed reaches the compound high line collars of more than 100 meter of per second, rolled wire (reinforcing bar).
Claims (7)
1. one kind high line carbide alloy composite ring, on the external circle of its collars, have the rolled wire groove, it is characterized in that: described composite roll ring body comprises collars matrix and the compound working lining different with the material trademark of this collars matrix, this compound working lining is an annular solid, be compounded on the cylindrical of collars matrix, collars matrix and compound working lining are integral through sintering.
2. a kind of high line carbide alloy composite ring according to claim 1, it is characterized in that: the material hardness of described compound working lining and density all are higher than the collars matrix 1-2 trade mark.
3. a kind of high line carbide alloy composite ring according to claim 1 is characterized in that: described compound working lining adopts the sub-micro of 0.5-1 μ m or is sintered to one less than nanoscale hard alloy material and the matrix of 0.5 μ m.
4. a kind of high line carbide alloy composite ring according to claim 1 is characterized in that: the ring body size of described composite ring and primary collars measure-alike.
5. one kind is exclusively used in the method for making the described a kind of high line carbide alloy composite ring of claim 1, and it is characterized in that: this method comprises following processing step:
(1) composite ring matrix and carbide alloy powder are packed into simultaneously vibrate in the graphite jig, compacting;
(2) put into special-purpose intermediate frequency hydraulic vibration sintering machine again and heat up, pressurization, vibratory sintering, the temperature of this pressure vibration liquid-phase sintering operation is 1380 ℃, pressure 3MPa is incubated 10 minutes;
(3) after sintering is finished, treat that workpiece is cooled to below 600 ℃, take out workpiece, check the blank collars be sintered to one, putting into special-purpose resistance argon gas sintering furnace again after qualified carries out the liquid-phase sintering of secondary malleation, is warming up to 1300 ℃-1400 ℃ according to the working layer difference, when reaching sintering temperature, pressure transfers to 8MPa, is incubated 30 minutes, shuts down and cools off with stove;
(4) when furnace temperature is lower than 400 ℃, the workpiece cooling of coming out of the stove is carried out grinding through after the assay was approved, promptly makes high line carbide alloy composite ring.
6. the manufacture method of a kind of high line carbide alloy composite ring according to claim 5 is characterized in that: described collars body portion can be obtained by following processing step:
(1) the conventional cemented carbide powder that will the not mix forming agent 2-4 μ m jolt ramming in the graphite jig of packing into;
(2) carry out intermediate frequency hydraulic vibration sintering, temperature is 1380 ℃, and pressure 3MPa is incubated 60 minutes;
(3) become body portion after the grinding.
7. the manufacture method of a kind of high line carbide alloy composite ring according to claim 5 is characterized in that: described collars body portion can utilize the old collars of scrapping, and obtains after surface cleaning is handled, and is sintered into one with working lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100786607A CN100382907C (en) | 2006-04-30 | 2006-04-30 | Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same |
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| CNB2006100786607A CN100382907C (en) | 2006-04-30 | 2006-04-30 | Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same |
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| CN1843644A true CN1843644A (en) | 2006-10-11 |
| CN100382907C CN100382907C (en) | 2008-04-23 |
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| JPS6018485B2 (en) * | 1982-07-05 | 1985-05-10 | 住友電気工業株式会社 | Composite cemented carbide hot rolling roll |
| CN2203194Y (en) * | 1993-04-27 | 1995-07-12 | 刘惠良 | Combined rolls |
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| CN1164451A (en) * | 1997-05-23 | 1997-11-12 | 冶金工业部钢铁研究总院 | Method for making hard alloy roll for rolling cold-rolled twisted steel |
| CN2380317Y (en) * | 1999-05-06 | 2000-05-31 | 殷凤高 | Regenerated tungsten-carbide roller ring |
| CN2379230Y (en) * | 1999-06-16 | 2000-05-24 | 中国科学院金属研究所 | Metal-ceramic composite roll collar |
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