CN104084585B - Oversize rolling roller and production method thereof - Google Patents
Oversize rolling roller and production method thereof Download PDFInfo
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- CN104084585B CN104084585B CN201410291098.0A CN201410291098A CN104084585B CN 104084585 B CN104084585 B CN 104084585B CN 201410291098 A CN201410291098 A CN 201410291098A CN 104084585 B CN104084585 B CN 104084585B
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Abstract
The invention provides an oversize rolling roller and a production method thereof. Oxide phase particles which are stable in high temperature performance are added to a copper matrix and accordingly the high electrical conductivity of materials can be maintained and meanwhile the strength of the copper alloy materials can be furthest improved. The materials are high in strength, good in electrical conductivity and thermal conductivity and high in softening resistance temperature. Aluminum oxide dispersion strengthened copper material powder is formed into billets through cold isostatic pressing, sheath air-exhausting and sealing treatment is performed, the hot isostatic pressing densification is performed, and the slicing machining is performed after the billets are machined into phi 300 mm to obtain the oversize rolling roller finally. The good strength, hardness, softening temperature and electrical conductivity of the oversize rolling roller can still be maintained under the high temperature condition.
Description
Technical field
The invention belongs to high performance material manufacture field, more particularly to a kind of oversize roller and preparation method thereof.
Background technology
It is existing processing major diameter conductive roller method be using founding casting produce blank, carry out flat-die forging,
Machining.Using founding, the composition of material is mostly Cu-Cr, Cu-Cr-Zr series alloy, belongs to solid solution strengthened alloy
Material, it is difficult to which the defect for overcoming is at a lower temperature about in the half of solid solubility temperature, will to lose their most of intensity,
Thus in high temperature environments (more than 500 DEG C), alloy material intensity, hardness decline, cause roller softening transform hydraulic performance decline
Problem.
The content of the invention
It is an object of the invention to provide a kind of oversize roller and preparation method thereof, it is intended to overcome cast alloys to process
The defect of the conductive material high-temperature behavior difference existing for major diameter roller.
The present invention is achieved in that a kind of preparation method of oversize roller, comprises the following steps：
(1) by Al2O3Dispersion-strengtherning copper product carries out cold isostatic compaction for blank so as to which even compact obtains billet；
(2) billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment；
(3) billet after the jacket is carried out being processed into the roller wheel blank of ￠ 300mm after high temperature insostatic pressing (HIP) densification；
(4) the roller wheel blank is carried out into slice processing according to technical requirements, obtains oversize roller.
Preferably, the cold isostatic compaction is specially：
On closely knit vibratory equipment, Al2O3Dispersion-strengtherning copper product is filled in the rubber bulb of isostatic cool pressing equipment, profit
The blank that size is that ￠ 330 × 250mm relative densities are 86～90% is prepared with cold isostatic compaction technique.
Preferably, it is described carry out different phase heating pumping sealing treatment be specially：
The billet is fitted in jacket, is first 10Pa by the pre- degasification of jacket to vacuum, in 150 DEG C～250 DEG C of temperature,
250 DEG C～350 DEG C, 350 DEG C～450 DEG C three temperature sections carry out degasification, the vacuum of each temperature section degasification reach 10Pa with
After upper, then it is warmed up to next temperature section.In temperature 450C, vacuum reaches and sealed after more than 10Pa.
Preferably, the billet after the jacket carries out high temperature insostatic pressing (HIP) densification and is specially：
Billet after jacket is placed in hot isostatic apparatus, high-purity argon gas are passed through, temperature-gradient method, and in 900 DEG C, pressure
For 100～105MPa when insulation 45 minutes after be cooled to room temperature take out.
Preferably, the Al2O3Dispersion-strengtherning copper product is prepared by following steps：
A, in medium-frequency induction furnace melting cathode copper, reduce furnace power to 20～30KW after copper fusing to be electrolysed, add
Copper：Aluminium content is 1:1 copper-aluminium intermediate alloy, makes the Al content in solution in 0.5～0.6% scope, and improving furnace power makes
Alloy molten solution is heated to 1150 DEG C～1250 DEG C, is incubated 10～15 minutes, powder is atomized into inert atomizing gas, at 100 DEG C
～150 DEG C are toasted and are screened out copper-Al alloy powder that particle diameter is not more than 150 μm；
B, the copper-Al alloy powder work continuously on oxygen machine leading oxygen equipment and is led, temperature control is 350 DEG C～450
DEG C, make the reaction of alloy powder particle surface generate layer oxide film；
C, by generate oxide-film after copper-Al alloy powder be placed in body of heater alumina growth stove, sealing heat up, in temperature
D, by the dispersion copper-Al alloy powder through crushing, screening, magnetic separation and reduction after obtain Al2O3Dispersion-strengtherning
Copper product.
Preferably, the atomizing medium is nitrogen or argon.
The present invention overcomes the deficiencies in the prior art, and a kind of Al is provided first2O3Dispersion-strengtherning copper product and preparation method thereof.
In order to improve the copper and copper alloy not enough defect of intensity at high temperature, in the present invention, Al2O3The preparation of dispersion-strengtherning copper product
During, by adding the oxide phase particle having stable high-temperature performance in Copper substrate, make material keep its high conductivity
While, the intensity of Cu alloy material is improved to greatest extent.Al2O3Dispersion-strengthened Cu material powder is by Copper substrate
Introducing is uniformly distributed, the tiny alumina particle with excellent heat stability, strengthens Copper substrate and obtained material.The material is not
But intensity is high, conductivity and thermal conductivity are also very good, more feature be at material in high temperature environments, it is than any copper alloy
Retainable intensity is all high, i.e., excellent anti-softening temperature.This feature is mainly small in Copper substrate from being evenly distributed on
Alumina particle.
The Al of the present invention2O3Dispersion-strengtherning copper product is a kind of functional material with good physical and mechanical property,
Can be widely applied to the lead frame of integrated circuit, various spot welding, high-grade car Auto-body Spot-welding, roll welding electrode, contact material,
Electric tool commutator, high-speed electric railway aerial line, power asynchronous traction motor of high rotor, pulse magnetic field conductor
Material, Aero-Space conductor material.
On this basis, invention further provides using above-mentioned Al2O3Dispersion-strengtherning copper product prepares a kind of super large chi
Very little roller material and preparation method thereof.
In the present invention, by by Al2O3Dispersion-strengtherning copper product carries out cold isostatic compaction for blank so as to uniform to cause
It is close to obtain billet；Then billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment；Then by the billet after jacket
After carrying out high temperature insostatic pressing (HIP) densification, the roller wheel blank of ￠ 300mm is processed into；Last pair roller wheel blank is cut according to technical requirements
Piece is processed, and obtains oversize roller.
In the present invention, using Al2O3Dispersion-strengthened Cu powder stock, according to the material of oversize conductive roller with plus
Work characteristic, is shaped accordingly using the press such as hydraulic press, cold, extruder, hot isostatic press, high speed forging hammer and mould.
Using Al2O3Phase dispersion-strengtherning copper powders technology of preparing, jacket technology, isostatic pressing technology are preparing containing ceramic component material
Major diameter conductive roller, makes unmanageable material under normal condition be changed into feasible.Realize super-large diameter roller in high temperature (900
More than DEG C) reach high intensity, high connductivity, it is high soften, solve common mould material in high temperature (500 DEG C) above low intensity, easily
The defect of softening.
Additionally, in the present invention, during the un-densified property powder article of high temperature insostatic pressing (HIP), jacket plays very critical effect.
Jacket, equivalent to mould, is the container for loading powder, while and being bubble-tight.Because after installing material, to carry out vacuum suction,
Exclude gas, the impurity component of dampness and readily volatilized property in powder, hot pressing after sealing.During hot repressing, it is necessary to assure
Pressure medium (argon) will not be entered in the space of powder, so that it is guaranteed that high temperature insostatic pressing (HIP) is smoothed out.If without air-tightness
Jacket, or the defect such as jacket hole, gases at high pressure will enter powder space, cannot be pressed into part, or part is produced
The poor quality of product.Even if there is a small amount of gas (0.5ppm) to enter the matrix of powder, the quality of hot pressing body can all dropped significantly
It is low, or even scrap.According to the effect of jacket, when selecting, designing jacket, it is necessary to follow several basic principles：1st, sheath material is not
Should react with powder；2nd, sheath material must adapt to selected temperature, pressure characteristic；3rd, the air-tightness of jacket itself will
It is reliable；4th, jacket answers shaping easy to process.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
Embodiment 1
Al2O3The preparation method of dispersion-strengtherning copper product, comprises the following steps：
(1) in medium-frequency induction furnace melting cathode copper, furnace power is reduced to 30KW, add copper after copper fusing to be electrolysed：
Aluminium content is 1:1 copper-aluminium intermediate alloy, makes the Al content in solution in 0.5% scope, then improves furnace power to full negative
Lotus, makes alloy molten solution be heated to 1150 DEG C, is incubated 15 minutes.Required chemical composition is produced using nitrogen atomization medium atomization
Copper-Al alloy powder powder stock.Powder stock is toasted at 150 DEG C, batch acquisition granularity is closed through screening qualified below 150 μm
Copper-Al alloy powder.
(2) alloyed powder low temperature leads oxygen：By copper-Al alloy powder it is special lead oxygen equipment and lead work continuously on oxygen machine, temperature
Control makes the reaction of alloy powder particle surface generate layer oxide film at 450 DEG C.
(3) aluminium phase growth in situ is aoxidized：Copper-the Al alloy powder for importing oxygen source is placed in into special body of heater alumina growth stove
In, sealing heats up.When temperature reaches 800 DEG C, 120 minutes are incubated, are then cooled to less than 100 DEG C and take out.
(4) one vibrosieve of size-reduced machine crushing screening one magnetic plant magnetic separation one reduction furnace reduction becomes and processes high-strength
Degree, high connductivity, the Al of high softening temperature2O3Dispersion-strengtherning copper product 1.
Embodiment 2
Al2O3The preparation method of dispersion-strengtherning copper product, comprises the following steps：
(1) in medium-frequency induction furnace melting cathode copper, furnace power is reduced to 20KW, add copper after copper fusing to be electrolysed：
Aluminium content is 1:1 copper-aluminium intermediate alloy, makes the Al content in solution in 0.6% scope, then improves furnace power to full negative
Lotus, makes alloy molten solution be heated to 1200 DEG C, is incubated 10 minutes.Required chemical composition is produced using the atomization of argon atomizing medium
Copper-Al alloy powder powder stock.Powder stock is toasted at 100 DEG C, batch acquisition granularity is closed through screening qualified below 150 μm
Copper-Al alloy powder.
(2) alloyed powder low temperature leads oxygen：By copper-Al alloy powder it is special lead oxygen equipment and lead work continuously on oxygen machine, temperature
Control makes the reaction of alloy powder particle surface generate layer oxide film at 450 DEG C.
(3) aluminium phase growth in situ is aoxidized：Copper-the Al alloy powder for importing oxygen source is placed in into special body of heater alumina growth stove
In, sealing heats up.When temperature reaches 800 DEG C, 120 minutes are incubated, are then cooled to less than 100 DEG C and take out.
(4) one vibrosieve of size-reduced machine crushing screening one magnetic plant magnetic separation one reduction furnace reduction becomes and processes high-strength
Degree, high connductivity, the Al of high softening temperature2O3Dispersion-strengtherning copper product 2.
Embodiment 3
Al2O3The preparation method of dispersion-strengtherning copper product, comprises the following steps：
(1) in medium-frequency induction furnace melting cathode copper, furnace power is reduced to 25KW, add copper after copper fusing to be electrolysed：
Aluminium content is 1:1 copper-aluminium intermediate alloy, makes the Al content in solution in 0.6% scope, then improves furnace power to full negative
Lotus, makes alloy molten solution be heated to 1250 DEG C, is incubated 12 minutes.Using nitrogen or argon atomizing medium atomization produce needed for chemistry into
Copper-Al alloy powder the powder stock for dividing.Powder stock is toasted at 130 DEG C, batch acquisition granularity is closed through screening and is closed below 150 μm
Copper-the Al alloy powder of lattice.
(2) alloyed powder low temperature leads oxygen：By copper-Al alloy powder it is special lead oxygen equipment and lead work continuously on oxygen machine, temperature
Control makes the reaction of alloy powder particle surface generate layer oxide film at 400 DEG C.
(3) aluminium phase growth in situ is aoxidized：Copper-the Al alloy powder for importing oxygen source is placed in into special body of heater alumina growth stove
In, sealing heats up.When temperature reaches 700 DEG C, 120 minutes are incubated, are then cooled to less than 100 DEG C and take out.
(4) it is high-strength that size-reduced machine crushing-vibrosieve screening-magnetic plant magnetic separation-reduction furnace reduction becomes processing
Degree, high connductivity, the Al of high softening temperature2O3Dispersion-strengtherning copper product 3.
Embodiment 4
A kind of preparation method of oversize roller, comprises the following steps：
(1) Al for preparing embodiment 12O3Dispersion-strengtherning copper product 1 is filled in isostatic cool pressing and sets on closely knit vibratory equipment
In standby rubber bulb, it is ￠ 350mm to prepare size using cold isostatic compaction technique, and relative density is 90% billet.
(2) billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment.Wherein, different phase heating pumping
Sealing treatment is specially：Billet is fitted in jacket, is first 10Pa by the pre- degasification of jacket to vacuum, in temperature 150 DEG C～250
DEG C, 250 DEG C～350 DEG C, 350 DEG C～450 DEG C three temperature sections carry out degasification, each temperature section degasification to vacuum be 10Pa with
Next temperature section is warmed up to again after upper.Can seal when 450 DEG C of vacuums of temperature reach more than 10Pa.
(3) billet after jacket is placed in hot isostatic apparatus, is passed through high-purity argon gas, temperature-gradient method, and 900 DEG C,
Insulation when pressure is 105MPa is cooled to room temperature taking-up after 45 minutes, be processed into the roller wheel blank of ￠ 300mm.
(4) roller wheel blank is carried out into slice processing according to technical requirements, obtains oversize roller 1.
Embodiment 5
A kind of preparation method of oversize roller, comprises the following steps：
(1) Al for preparing embodiment 22O3Dispersion-strengtherning copper product 2 is filled in isostatic cool pressing and sets on closely knit vibratory equipment
In standby rubber bulb, it is ￠ 350mm to prepare size using cold isostatic compaction technique, and relative density is 86% billet.
(2) billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment.Wherein, different phase heating pumping
Sealing treatment is specially：Billet is fitted in jacket, is first 10Pa by the pre- degasification of jacket to vacuum, in temperature 150 DEG C～250
DEG C, 250 DEG C～350 DEG C, 350 DEG C～450 DEG C three temperature sections carry out degasification, each temperature section degasification to vacuum be 10Pa with
It was warmed up to next temperature section when upper again.Can seal when 450 DEG C of vacuums of temperature reach more than 10Pa.
(3) billet after jacket is placed in hot isostatic apparatus, is passed through high-purity argon gas, temperature-gradient method, and 900 DEG C,
Insulation when pressure is 100MPa is cooled to room temperature taking-up after 60 minutes, be processed into the roller wheel blank of ￠ 300mm.
(4) roller wheel blank is carried out into slice processing according to technical requirements, obtains oversize roller 2.
Embodiment 6
A kind of preparation method of oversize roller, comprises the following steps：
(1) Al for preparing embodiment 32O3Dispersion-strengtherning copper product 3 is filled in isostatic cool pressing and sets on closely knit vibratory equipment
In standby rubber bulb, it is 330 × 250mm of ￠ to prepare size using cold isostatic compaction technique, and relative density is 86% billet.
(2) billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment.Wherein, different phase heating pumping
Sealing treatment is specially：Billet is fitted in jacket, is first 10Pa by the pre- degasification of jacket to vacuum, in temperature 150 DEG C～250
DEG C, 250 DEG C～350 DEG C, 350 DEG C～450 DEG C three temperature sections carry out degasification, each temperature section degasification to vacuum be 10Pa with
It was warmed up to next temperature section when upper again, can seals when 450 DEG C of vacuums of temperature reach more than 10Pa.
(3) billet after jacket is placed in hot isostatic apparatus, is passed through high-purity argon gas, temperature-gradient method, and 900 DEG C,
Insulation when pressure is 105MPa is cooled to room temperature taking-up after 45 minutes, be processed into the roller wheel blank of ￠ 300mm.
(4) roller wheel blank is carried out into slice processing according to technical requirements, obtains oversize roller 3.
Comparative example
The preparation method of existing roller, comprises the following steps：
(1) cathode copper is melted first with electric furnace, then reduce electric furnace power, in copper solution add Cu-Cr,
Cu-Zr intermediate alloys, improve electric furnace power all of metal molten in stove it is complete after, in this condition, maintain one timing
Between.
(2) copper alloy solution after fusing is cast into a diameter ofAlloy ingot blank.Machining alloy pig
Base.
(3) alloy ingot blank is heated to 850 DEG C, is incubated 45 minutes, then carry out flat-die forging to size 330mm.
(4) forging stock is machined to required roller 4 after solid solution, aging strengthening model.
Effect example
Physical and mechanical property survey is carried out to the oversize roller 1～4 that above-described embodiment and comparative example prepare
Examination, test result is as shown in table 1 below：
The physical and mechanical property of the high-strength highly-conductive oversize roller of table 1
From table 1 it follows that the oversize roller 1～3 of the present invention can still keep at high operating temperatures itself good
Intensity well, hardness, softening temperature and conductivity.
The shortcoming and defect with prior art is compared, the invention has the advantages that：
(1) Al of the invention2O3Dispersion-strengtherning copper product has that intensity high, conductivity and thermal conductivity be good, anti-softening temperature is high
The features such as, it is with a wide range of applications.
(2) it is of the invention prepare oversize roller still can keep at high operating temperatures good intensity itself, hardness,
Softening temperature and conductivity.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of preparation method of oversize roller, it is characterised in that comprise the following steps：
(1) by Al2O3Dispersion-strengtherning copper product carries out cold isostatic compaction for blank so as to which even compact obtains billet；
(2) billet is wrapped into into jacket, carries out different phase heating pumping sealing treatment；
(3) billet after the jacket is carried out being processed into the roller wheel blank of ￠ 300mm after high temperature insostatic pressing (HIP) densification；
(4) the roller wheel blank is carried out into slice processing according to technical requirements, obtains oversize roller.
2. the preparation method of oversize roller as claimed in claim 1, it is characterised in that the cold isostatic compaction is concrete
For：
On closely knit vibratory equipment, Al2O3Dispersion-strengtherning copper product is filled in isostatic cool pressing equipment on closely knit vibratory equipment
In rubber bulb, it is 330 × 250mm of ￠ to prepare size using cold isostatic compaction technique, and relative density is 86%～90% base
Material.
3. the preparation method of oversize roller as claimed in claim 1, it is characterised in that described to carry out different phase heating
Pumping sealing treatment is specially：
The billet is fitted in jacket, is first 10Pa by the pre- degasification of jacket to vacuum, in 150 DEG C～250 DEG C of temperature, 250
DEG C～350 DEG C, 350 DEG C～450 DEG C three temperature sections carry out degasification, the vacuum of each temperature section degasification reaches more than 10Pa
Afterwards, then it is warmed up to next temperature section, in 450 DEG C of temperature, vacuum reaches and sealed after more than 10Pa.
4. the preparation method of oversize roller as claimed in claim 1, it is characterised in that the billet after the jacket is carried out
High temperature insostatic pressing (HIP) densification is specially：
Billet after jacket is placed in hot isostatic apparatus, high-purity argon gas, temperature-gradient method is passed through, and is in 900 DEG C, pressure
Room temperature taking-up is cooled to after being incubated 45 minutes during 100MPa～105MPa.
5. the preparation method of oversize roller as claimed in claim 1 or 2, it is characterised in that the Al2O3Dispersion-strengtherning
Copper product is prepared by following steps：
A, in medium-frequency induction furnace melting cathode copper, reduce furnace power to 20KW～30KW after copper fusing to be electrolysed, add copper：
Aluminium content is 1:1 copper-aluminium intermediate alloy, makes the Al content in solution in 0.5%～0.6% scope, and improving furnace power makes
Alloy molten solution is heated to 1150 DEG C～1250 DEG C, 10～15 minutes is incubated, with inert gas atomizer into powder, 100 DEG C～150
DEG C toast and screen out copper-Al alloy powder that particle diameter is not more than 150 μm；
B, the copper-Al alloy powder work continuously on oxygen machine leading oxygen equipment and is led, temperature control makes at 350 DEG C～450 DEG C
The reaction of alloy powder particle surface generates layer oxide film；
C, by generate oxide-film after copper-Al alloy powder be placed in body of heater alumina growth stove, sealing heat up, reach in temperature
When 600 DEG C～800 DEG C, 120 minutes are incubated, are then cooled to less than 100 DEG C and take out, obtain dispersion copper-Al alloy powder；
D, by the dispersion copper-Al alloy powder through crushing, screening, magnetic separation and reduction after obtain Al2O3Dispersion-strengtherning copper material
Material.
6. the preparation method of oversize roller as claimed in claim 5, it is characterised in that the atomizing medium be nitrogen or
Argon.
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Denomination of invention: Oversize rolling roller and production method thereof Effective date of registration: 20171106 Granted publication date: 20170510 Pledgee: Huaxia Bank, Limited by Share Ltd, Kunming, Dianchi branch Pledgor: Yunnan Keenly New Material Co., Ltd. Registration number: 2017530000015 |
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