CN107267810A - A kind of heat-resistant bearer is with high temperature alloy and heater for rolling steel heat-resistant bearer - Google Patents
A kind of heat-resistant bearer is with high temperature alloy and heater for rolling steel heat-resistant bearer Download PDFInfo
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- CN107267810A CN107267810A CN201710427318.1A CN201710427318A CN107267810A CN 107267810 A CN107267810 A CN 107267810A CN 201710427318 A CN201710427318 A CN 201710427318A CN 107267810 A CN107267810 A CN 107267810A
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- Prior art keywords
- heat
- high temperature
- alloy
- resistant bearer
- resistant
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
Abstract
The invention discloses a kind of heat-resistant bearer high temperature alloy in high-temperature alloy material field and heater for rolling steel heat-resistant bearer, the high temperature alloy includes the chemical composition of following percentage by weight：C 0.05%~0.30%, Si 0.5%~1.5%, Mn 0.5%~1.5%, Cr 26%~31%, Ni 13%~18%, W 1.5%~3.5%, Mo 1%~2%, Nb 0.5%~1.5%, Ce 0.02%~0.2%, Zr 0.02%~0.1%, Fe 0.01%~10%, remaining is Co and inevitable impurity.The heat-resistant bearer that the high temperature alloy of the present invention is made, used under the heater for rolling steel furnace temperature that may be implemented in 1300 DEG C~1350 DEG C, it is arranged on Vaporizing cooling water cooling beam and supports steel billet, with preferable high temperature resistance compression creep performance, high temperature oxidation resistance, the problem of preventing corrosion, wear and buildup, can extend the service life of heat-resistant bearer.
Description
Technical field
The invention belongs to high-temperature alloy material field, more particularly to a kind of high temperature alloy for being used to manufacture heat-resistant bearer and
The heater for rolling steel heat-resistant bearer being made of the alloy.
Background technology
Steel billet must use continous way heater for rolling steel to heat before the rolling so that steel billet is preheated, heated, successively
Heat（Isothermal）Three processes, by heating steel billet to specific technological temperature, and require that the internal and external temperature of steel billet reaches unanimity.Continuously
Formula heater for rolling steel, which includes in walking beam furnace and pusher-type furnace, continous way heater for rolling steel, is provided with water cooling
Beam, in the heating process of steel billet, is disposed with heat-resistant bearer, heated steel billet is directly arranged at heat resistant pad on water-cooled beam in stove
On block, heat-resistant bearer is the critical component of continous way heater for rolling steel, and it is chronically at high temperature, high capacity and corrosive environment
Under bad working environments, the material to heat-resistant bearer requires very strict.
The nineteen forty-four Yan Keel9A engines of Westinghouse Electric employ the hot investment casting blades of cobalt-base alloys HS 23, since then
Later cobalt base superalloy starts to be widely used in manufacture blade of aviation engine and the exigent part of some Corrosion Protections.
Pose marre companies of Germany exploitation UMCo-50 alloys in 1963 are used for the heat-resistant bearer for manufacturing heater for rolling steel, the alloy ratio
The temperature in use of 30Cr-25Ni-Fe series of high temperature alloys improves 300 DEG C, not only with excellent mechanical behavior under high temperature and chemistry
Performance, and there is self-lubricating function at high temperature.Nineteen eighty-three, Japan have developed the heat-resistant bearer using KHR40CM alloys,
Compared with UMCo-50 alloy heat-resistant bearers, KHR40CM alloys operating temperature is improved, and antioxygenic property is strengthened, heat-resistant bearer
Limiting altitude further lifted, reduce the temperature difference with steel billet at the top of heat-resistant bearer, make to be heated steel billet because the heating temperature difference is led
The possibility for " black print " occur is caused effectively to reduce.The steel rolling that present cobalt base superalloy is widely used in worldwide is used
Walking beam furnace and pusher-type furnace.
As what cobalt-alloy material was studied further gos deep into, material worker has found that cobalt alloy still has at high temperature
Weak point：UMCo-50 can separate out harmful σ phases when being used for a long time for 600~900 DEG C, be used for a long time more than 1000 DEG C
When, it can separate out（Cr, Fe）2N sheet phases, cause the waste of heat-resistant bearer larger, easily produce gross distortion, and influence uses the longevity
Life.
In recent years, widely used energy-efficient Vaporizing cooling skill is started in steel rolling step-by-step movement heavy slab heating furnace
Art, the temperature in use of heat-resistant bearer is consequently increased, and heat-resistant bearer upper surface operating temperature is higher by 100 DEG C~150 compared with water-cooled beam
DEG C, 1300 DEG C~1350 DEG C are generally operated in, the long-term work of UMCo-50, KHR40CM alloy is under so severe working condition
When, the problem of easily occurring corrosion, oxidation, compression, abrasion and buildup, service life can not be effectively ensured.
The content of the invention
An object of the present invention is to provide a kind of heat-resistant bearer high temperature alloy, the heat resistant pad being made of this alloy
Used under block, the heater for rolling steel furnace temperature that may be implemented in 1300 DEG C~1350 DEG C, be arranged in supporting steel on Vaporizing cooling water cooling beam
Base, with preferable high temperature resistance compression creep performance, high temperature oxidation resistance, the problem of preventing corrosion, wear and buildup,
The service life of heat-resistant bearer can be extended.
The object of the present invention is achieved like this：A kind of heat-resistant bearer high temperature alloy, the alloy includes following weight hundred
Divide the chemical composition of ratio：
C 0.05%~0.30%, Si 0.5%~1.5%, Mn 0.5%~1.5%, Cr 26%~31%, Ni 13%~18%, W 1.5%
~3.5%, Mo 1%~2%, Nb 0.5%~1.5%, Ce 0.02%~0.2%, Zr 0.02%~0.1%, Fe 0.01%~10%, its
Remaining is Co and inevitable impurity.
This alloy, using Co as matrix element, is because Co is under certain high temperature and stress condition, with relatively flat
Dependent variable and time curve, ensure that the Properties of High Temperature Creep of this alloy, heat-resistant bearer be in high temperature, it is low should
Stationary parts under the working environment of power, the heat-resistant bearer being made of this alloy is effectively subtracted in the presence of high temperature, low stress
Compression is lacked, with high temperature resistance compression creep performance, high cobalt also makes this alloy have good corrosion and heat resistant, heat shock resistance
Performance, be conducive to extend heat-resistant bearer service life.Compared with nickel-base alloy, cobalt-base alloys at high temperature coefficient of friction compared with
Small, " compatibility " with heated steel billet is relatively low, is difficult to scratch steel billet, energy in high temperature environments with its heat-resistant bearer made
Enough improve the heating quality of steel billet.
This alloy contains the wt% of 26 wt%~31 Cr, can form stabilization, fine and close Cr2O3Low-alloyed oxidation, drops in layer
Speed, improves the high temperature oxidation resistance of alloy, particularly high temperature oxidation resistance.
This alloy contains the wt% of 8 wt%~15 Ni, can be while solid solution certain alloying element, for suppressing harmful
The precipitation of σ phases is so as to improve the combination property of alloy, to ensure that alloy has enough intensity and toughness at high temperature.
This alloy contains the wt% of the wt% of 1.5 wt%~3.5 W and 1 wt%~2 Mo, plays solution strengthening effect, Neng Gouti
High alloy recrystallization temperature and Binding Forces Between Atoms, increase γ '-γ " mismatch, hinder diffusion deformation, advantageously reduce alloy
Stacking fault energy, so as to improve the creep rupture strength of this alloy.
This alloy contains the wt% of 0.5 wt%~1.5 Nb, can have been formed Precipitation precipitation enhancement γ ' and
γ " phases, and increase γ '-γ " mismatch, the mechanical behavior under high temperature of alloy is improved, in combination with Co elements and refractory element Mo,
More stable highly alloyed γ ' phases can be obtained, solution strengthening effect and the second phase skeleton invigoration effect of casting is obtained more
It is good to coordinate.
This alloy contains the wt% of 0.05 wt~0.30 C, can coordinate the elements such as Co, Nb, Zr in dendrite circle of casting alloy
And banding, the MC and M of block distribution are formed on crystal boundary23C6Type carbide, while " skeleton " of the series connection as each crystal grain, increase is brilliant
Boundary and interdendritic deformation resistance, can improve the elevated temperature strength of alloy.
This alloy adds appropriate rare earth element ce, removes gas and impurity as purifying agent when smelting, improves alloy
Degree of purity, can reduce impurity element and the tendency of segregation occurs in crystal boundary, improve crystal boundary structure, increase the decentralization of impurity, have
Help improve the mechanical behavior under high temperature of alloy.Ce can also reduce alloy Cr2O3Trivalent Cr ions moving in oxidation film layer in layer
Speed is moved, is conducive to improving the bond strength of oxide-film and cobalt alloy matrix, so that it is anti-more than 1000 DEG C to strengthen this alloy
Oxidation susceptibility.
This alloy adds the wt% of 0.02 wt%~0.1 Zr, because Zr and C, S have very strong affinity, utilizes Zr
Atom segregation can purify the S impurity of grain boundaries free state in the characteristic of crystal boundary, reduce because S segregations are caused by crystal boundary
Crackle tendency；Zr can also promote continuous band-shaped and block MC formation simultaneously, improve the pattern and distribution of carbide, enter
One step improves the grain-boundary strength of alloy, so as to postpone the formation and extension of crackle under the condition of high temperature, extends the service life of alloy.
Meanwhile, the Zr and rare earth element ce that this alloy is added can improve cobalt-base alloys at high temperature with refining alloy crystallite dimension
Wearability, but excessive addition（More than 0.5wt%, refer to final chemical analysis content）The effect of crystal grain thinning can not then be played
Really, while producing new harmful phase increase alloy fragility.
This alloy adds appropriate Si, Mn, helps to increase the mobility of alloy, Si, Mn are served as deoxidier
Certain solution strengthening effect, its concentration is sufficiently high, to realize these favorable influences in alloy, but should not be too high
So that dropping low-alloyed toughness.The control of Si contents is in the wt% of 0.5 wt%~1.5 in the present invention.
As a further improvement on the present invention, the alloy of heat-resistant bearer high temperature alloy of the invention further comprises as follows
The chemical composition of percentage by weight：C 0.11%~0.15%, Si 0.8%~1.1%, Mn 0.5%~0.8%, Cr 27.5%~
29%, Ni 13.5%~17%, W 1.8%~2.3%, Mo 1.1%~1.6%, Nb 0.6%~1.1%, Ce 0.07%~0.12%, Zr
0.05%~0.1%, Fe 0.01%~5%, remaining is Co and inevitable impurity.
As a preferred embodiment of the present invention, heat-resistant bearer of the invention specifically includes following weight hundred with high temperature alloy
Divide the chemical composition of ratio：C 0.12%, Si 0.9%, Mn 0.6%, Cr 28.5%, Ni 14.5%, W 1.9%, Mo 1.3%, Nb
0.8%, Ce 0.08%, Zr 0.06%, Fe 4%, remaining is Co and inevitable impurity.
The second object of the present invention is to provide a kind of heater for rolling steel heat-resistant bearer being made of above-mentioned alloy material.
The heat-resistant bearer is primarily adapted for use in heater for rolling steel, preferably uses vaccum sensitive stove or intermediate frequency furnace to be poured into after foundry alloy melting
Type, then by cast molding after the foundry alloy rapid remelting of shaping.This heat-resistant bearer and now widely used UMCo-50 alloy systems
Into cushion block compare, with more preferable structure stability and high temperature resistance compression creep performance, improve high temperature oxidation resistance and
High temperature resistance buildup performance, the problem of preventing corrosion or wear and tear, can extend the service life for the heat-resistant bearer being made.
Embodiment
The present invention is described in detail with embodiment below.
Embodiment 1
A kind of heater for rolling steel heat-resistant bearer, the chemical composition of the heat-resistant bearer high temperature alloy designed according to the present invention, it
Including following weight percent composition：C 0.05%, Si 0.5%, Mn 0.5%, Cr 26%, Ni 13%, W 1.5%, Mo 1%, Nb
0.5%, Ce 0.02%, Zr 0.02%, Fe 0.01%, remaining is Co and inevitable impurity.By the alloy material of said ratio
Using vacuum induction melting foundry alloy, wherein Zr and Ce are added in second of Alloying Treatment, then are poured into ingot mould, cooling
After obtain master alloy ingot.Then master alloy ingot is put into vaccum sensitive stove and carries out rapid remelting, be poured into shell, it is final broken true
Sky takes out casting mold, obtains 1# test specimens.
Embodiment 2
A kind of heater for rolling steel heat-resistant bearer, the chemical composition of the heat-resistant bearer high temperature alloy designed according to the present invention, it
Including following weight percent composition：C 0.12%, Si 0.9%, Mn 0.6%, Cr 28.5%, Ni 14.5%, W 1.9%, Mo
1.3%, Nb 0.8%, Ce 0.08%, Zr 0.06%, Fe 4%, remaining is Co and inevitable impurity.By the conjunction of said ratio
Golden material uses vacuum induction melting foundry alloy, and wherein Zr and Ce are added in second of Alloying Treatment, then are poured into ingot
Master alloy ingot is obtained after mould, cooling.Then master alloy ingot is put into vaccum sensitive stove and carries out rapid remelting, be poured into shell,
Final vacuum breaker takes out casting mold, obtains 2# test specimens.
Embodiment 3
A kind of heater for rolling steel heat-resistant bearer, the chemical composition of the heat-resistant bearer high temperature alloy designed according to the present invention, it
Including following weight percent composition：C 0.16%, Si 1.2%, Mn 0.9%, Cr 29.5%, Ni 15%, W 2.4%, Mo
1.5%, Nb 1.1%, Ce 0.12%, Zr 0.04%, Fe 2%, remaining is Co and inevitable impurity.By the conjunction of said ratio
Golden material uses vacuum induction melting foundry alloy, and wherein Zr and Ce are added in second of Alloying Treatment, then are poured into ingot
Master alloy ingot is obtained after mould, cooling.Then master alloy ingot is put into vaccum sensitive stove and carries out rapid remelting, be poured into shell,
Final vacuum breaker takes out casting mold, obtains 3# test specimens.
Embodiment 4
A kind of heater for rolling steel heat-resistant bearer, the chemical composition of the heat-resistant bearer high temperature alloy designed according to the present invention, it
Including following weight percent composition：C 0.24%, Si 1.35%, Mn 1.2%, Cr 30%, Ni 16.5%, W 3.1%, Mo
1.7%, Nb 1.3%, Ce 0.16%, Zr 0.08%, Fe 7%, remaining is Co and inevitable impurity.By the conjunction of said ratio
Golden material uses vacuum induction melting foundry alloy, and wherein Zr and Ce are added in second of Alloying Treatment, then are poured into ingot
Master alloy ingot is obtained after mould, cooling.Then master alloy ingot is put into vaccum sensitive stove and carries out rapid remelting, be poured into shell,
Final vacuum breaker takes out casting mold, obtains 4# test specimens.
Embodiment 5
A kind of heater for rolling steel heat-resistant bearer, the chemical composition of the heat-resistant bearer high temperature alloy designed according to the present invention, it
Including following weight percent composition：C 0.30%, Si 1.5%, Mn 1.5%, Cr 31%, Ni 18%, W 3.5%, Mo 2%, Nb
1.5%, Ce 0.2%, Zr 0.1%, Fe 10%, remaining is Co and inevitable impurity.The alloy material of said ratio is used
Vacuum induction melting foundry alloy, wherein Zr and Ce are added in second of Alloying Treatment, then are poured into ingot mould, after cooling
To master alloy ingot.Then master alloy ingot is put into vaccum sensitive stove and carries out rapid remelting, be poured into shell, final vacuum breaker takes
Go out casting mold, obtain 5# test specimens.
Comparative example 1
The heat-resistant bearer that a kind of use UMCo-50 alloys are made, UMCo-50 alloys are melted by composition proportion using vaccum sensitive stove
It is poured into after refining after ingot mould, cooling and obtains master alloy ingot, master alloy ingot then is put into vaccum sensitive stove carries out rapid remelting, pours
Note in shell, final vacuum breaker takes out casting mold, the 6# test specimens five with size with 1# test specimens are made.
Comparative example 2
A kind of heater for rolling steel heat-resistant bearer, its alloy includes the chemical composition of following percentage by weight：C 0.30%, Si
1.5%, Mn 1.5%, Cr 31%, Ni 18%, W 3.5%, Mo 2%, Nb 1.5%, Ce 0.2%, Fe 10%, remaining is Co and can not
The impurity avoided.The alloy material of said ratio is used into vacuum induction melting foundry alloy, wherein Ce is in second of alloying
Added during processing, then obtain master alloy ingot after being poured into ingot mould, cooling.Then master alloy ingot is put into vaccum sensitive stove to carry out soon
Fast remelting, is poured into shell, and final vacuum breaker takes out casting mold, obtains the 7# test specimens five with size with 1# test specimens.7# test specimens
Alloy in be free of Zr.
Above-mentioned 1#~7# test specimens are subjected to high temperature compressed experiment on high temperature compressed testing machine, and respectively in heater for rolling steel
The middle contrast test for carrying out practical probation.
It is separately sampled simultaneously in the same area of each embodiment and the heat-resistant bearer of comparative example in drawing by high temperature contrast test
The sample that specification is 12.7mm × 38mm is cut into wire electric discharge, then by U.S.ASTM standard E209-00《Metal
Compression test specification of the material under routine or fast heating ramp rate and strain rate》Constant-speed heating is distinguished to 1100 DEG C and 1200 DEG C
（Less than 1000 DEG C heating rates are no more than 3 DEG C/min, and more than 1000 DEG C heating rates are no more than 5 DEG C/min）, determine each test specimen
Deflection up to compression stress when 10%, finally average as result of the test, specific data are shown in Table 1.
The high temperature compressed experiment table of table 1
In practical probation contrast test, by obtained each heat-resistant bearer test specimen in above-described embodiment and comparative example 1, comparative example 2
In obtained heat-resistant bearer test specimen the soaking zone vaporization water of same heater for rolling steel is alternately sequentially arranged in along furnace superintendent direction respectively
On cold beam, and the section furnace temperature is controlled at 1320 ± 10 DEG C, after 1 year, every the average mill of 6 months measurement heat-resistant bearers
Damage amount, specific data are shown in Table 2.
The practical probation result table of table 2
It can be apparent from from the data of Tables 1 and 2：It is more now widely used using heat-resistant bearer produced by the present invention
The heat-resistant bearer that UMCo-50 alloys are made is compared, with more preferable high temperature resistance compression performance and abrasion resistance properties, high-temperature mechanics
Can be more preferable, with longer service life；Using the present invention each alloy material manufacture heat-resistant bearer compared be not added with Zr manufacture
More preferably, Zr addition causes the heat resistant pad that the alloy of the present invention is made for heat-resistant bearer, high temperature resistance compression performance and abrasion resistance properties
More preferably, service life is longer for block mechanical behavior under high temperature.
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour just can make one to some of which technical characteristic
A little to replace and deform, these are replaced and deformed within the scope of the present invention.
Claims (4)
1. a kind of heat-resistant bearer high temperature alloy, it is characterised in that the alloy includes the chemical composition of following percentage by weight：
C 0.05%~0.30%, Si 0.5%~1.5%, Mn 0.5%~1.5%, Cr 26%~31%, Ni 13%~18%, W 1.5%
~3.5%, Mo 1%~2%, Nb 0.5%~1.5%, Ce 0.02%~0.2%, Zr 0.02%~0.1%, Fe 0.01%~10%, its
Remaining is Co and inevitable impurity.
2. a kind of heat-resistant bearer high temperature alloy according to claim 1, it is characterised in that the alloy includes following weight
The chemical composition of percentage：
C 0.11%~0.15%, Si 0.8%~1.1%, Mn 0.5%~0.8%, Cr 27.5%~29%, Ni 13.5%~17%, W
1.8%~2.3%, Mo 1.1%~1.6%, Nb 0.6%~1.1%, Ce 0.07%~0.12%, Zr 0.05%~0.1%, Fe
0.01%~5%, remaining is Co and inevitable impurity.
3. a kind of heat-resistant bearer high temperature alloy according to claim 2, it is characterised in that the alloy includes following weight
The chemical composition of percentage：
C 0.12%, Si 0.9%, Mn 0.6%, Cr 28.5%, Ni 14.5%, W 1.9%, Mo 1.3%, Nb 0.8%, Ce
0.08%, Zr 0.06%, Fe 4%, remaining is Co and inevitable impurity.
4. a kind of heater for rolling steel heat-resistant bearer, it is characterised in that the cushion block is using described in claim 1-3 any one
Heat-resistant bearer be made of high temperature alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710427318.1A CN107267810A (en) | 2017-06-08 | 2017-06-08 | A kind of heat-resistant bearer is with high temperature alloy and heater for rolling steel heat-resistant bearer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427318.1A CN107267810A (en) | 2017-06-08 | 2017-06-08 | A kind of heat-resistant bearer is with high temperature alloy and heater for rolling steel heat-resistant bearer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170769A (en) * | 1997-05-28 | 1998-01-21 | 冶金工业部钢铁研究总院 | High cobalt alloy for heating furnace |
| WO2006059805A1 (en) * | 2004-12-02 | 2006-06-08 | National Institute For Materials Science | Heat-resistant superalloy |
| US20080185078A1 (en) * | 2005-09-15 | 2008-08-07 | Japan Science And Technology Agency | Cobalt-base alloy with high heat resistance and high strength and process for producing the same |
| JP2010106827A (en) * | 2008-10-13 | 2010-05-13 | Alstom Technology Ltd | Constituent member of high-temperature steam turbine and high-temperature steam turbine |
| CN102168211A (en) * | 2011-05-30 | 2011-08-31 | 中冶京诚(扬州)冶金科技产业有限公司 | High-temperature-resistant cobalt-based alloy for heat-resistant heel block of steel rolling heating furnace |
| CN104032198A (en) * | 2014-06-16 | 2014-09-10 | 中冶京诚(扬州)冶金科技产业有限公司 | High temperature alloy for heat-resisting furnace roller and heat-resisting furnace roller for thermal treatment furnace |
-
2017
- 2017-06-08 CN CN201710427318.1A patent/CN107267810A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170769A (en) * | 1997-05-28 | 1998-01-21 | 冶金工业部钢铁研究总院 | High cobalt alloy for heating furnace |
| WO2006059805A1 (en) * | 2004-12-02 | 2006-06-08 | National Institute For Materials Science | Heat-resistant superalloy |
| US20080185078A1 (en) * | 2005-09-15 | 2008-08-07 | Japan Science And Technology Agency | Cobalt-base alloy with high heat resistance and high strength and process for producing the same |
| JP2010106827A (en) * | 2008-10-13 | 2010-05-13 | Alstom Technology Ltd | Constituent member of high-temperature steam turbine and high-temperature steam turbine |
| CN102168211A (en) * | 2011-05-30 | 2011-08-31 | 中冶京诚(扬州)冶金科技产业有限公司 | High-temperature-resistant cobalt-based alloy for heat-resistant heel block of steel rolling heating furnace |
| CN104032198A (en) * | 2014-06-16 | 2014-09-10 | 中冶京诚(扬州)冶金科技产业有限公司 | High temperature alloy for heat-resisting furnace roller and heat-resisting furnace roller for thermal treatment furnace |
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