CN109402342A - A kind of electrothermal alloy and preparation method thereof - Google Patents
A kind of electrothermal alloy and preparation method thereof Download PDFInfo
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- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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Abstract
The invention belongs to electrothermal alloy technical fields, and in particular to a kind of electrothermal alloy and preparation method thereof, electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-6%, V 3-5%, Ti 0.05-0.1%, rare earth element 0.3-0.5%, active element 0.1-1%, remaining is Fe and impurity, wherein, impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.The present invention, come refining alloy crystal grain, reduces the tendency that crystal grain is grown up by addition V, and the additive amount of V helps to obtain the temperature-coefficient of electrical resistance told somebody what one's real intentions are in 3-5%；The thermal stability that material is improved by addition rare earth element, refines crystal grain, improves elevated temperature strength and creep resistance, enhances oxidation resistance, improves heat, cold-forming property, improves lumber recovery；A small amount of Si is added to increase the room temperature intensity of resistivity and alloy material, improves the medium temperature oxidation resistance of material, reduces the loss of Al and rare earth element, and the high temperature that can reduce material inhales nitrogen situation, brittleness increases caused by avoiding material from inhaling nitrogen because of high temperature.
Description
Technical field
The invention belongs to electrothermal alloy technical fields, and in particular to a kind of electrothermal alloy and preparation method thereof.
Background technique
Electrothermal alloy is the functional material for converting electrical energy into thermal energy, is to be widely used in industry and civilian electric heating member
Part.The electric heating wire in China just starts to develop and develop in the sixties in last century, while developing it and processing skill and equipment, Zhi Nengjia
Work greatly limits the use scope of electric heating wire, directly for the exposed silk heating such as Equipment for Heating Processing, surface treatment drying equipment
Household electrical appliance to end of the eighties in last century foreign countries enter the country, and household electrical appliances electric heating tube just started to develop and develop the beginning of the nineties.
With the development of science and technology and the improvement of people's living standards, each field are higher and higher to the performance requirement of electrothermal alloy.
Fe-based perovskite-like oxide is to be widely used in industry and civilian heating element and China to be most widely used
One of electrothermal alloy.Fe-based perovskite-like oxide is a kind of iron-based solid solution alloy of the α form of body-centered cubic lattic, compared to nickel
Chromium base electrothermal alloy, its thermal stability and resistivity will be higher, therefore under identical working environment, Fe-based perovskite-like oxide
Material is more saved, and input power is also more stable.But the resistivity and resistance temperature of current Fe-based perovskite-like oxide
Coefficient has room for improvement, and the elevated temperature strength of Fe-based perovskite-like oxide is low, and creep strength is also low, and plasticity is poor after long-time service,
Brittleness is big, frangibility.
Summary of the invention
To solve the above-mentioned problems, the invention discloses a kind of electrothermal alloy and preparation method thereof, the electrothermal alloy resistance
It is smaller that rate is high, resistance varies with temperature rate, and has preferable elevated temperature strength and creep resistance.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-6%, V 3-
5%, Ti 0.05-0.1%, rare earth element 0.3-0.5%, active element 0.1-1%, remaining is Fe and impurity, wherein impurity
Are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.V is added in Fe-based perovskite-like oxide can refine conjunction
Jin Jing's grain, reduces the tendency grown up of crystal grain, tests prove that, when the additive amount of V is in 3-5%, temperature system can be substantially reduced
Number.
Preferably, above-mentioned rare earth element is one or more of Y, La, Ce, the active element is Si, Co, Nb,
One or more of Mo, W.
Preferably, above-mentioned electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-
6%, V 3-5%, Ti 0.05-0.1%, Y 0.3-0.5%, Si 0.1-0.5%, remaining is Fe and impurity, wherein impurity
Are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.The addition of a small amount of Si can increase resistivity and alloy
The room temperature intensity of material improves the medium temperature oxidation resistance of material, reduces the loss of Al and rare earth element, and can reduce material
High temperature inhale nitrogen situation, avoid material because high temperature inhale nitrogen caused by brittleness increase, but experiments have shown that, excessive Si in Aludirome
Content will affect Al2O3The integrality of oxidation film, influences antiseptic property.
Preferably, above-mentioned electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-
6%, V 3-5%, Ti 0.05-0.1%, La 0.3-0.5%, Co 0.1-0.5%, Mo 0.1-0.5%, remaining for Fe and
Impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.Material can be improved in Co and Mo
Elevated temperature strength, improve creep resistance, extend the materials'use service life.
Preferably, above-mentioned electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-
6%, V 3-5%, Ti 0.05-0.1%, La+Ce 0.3-0.5%, Nb 0.1-0.5%, Mo 0.1-0.5%, remaining is Fe
And impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.The height of material can be improved in Nb
Warm intensity improves creep resistance, extends the materials'use service life.
Preferably, above-mentioned electrothermal alloy is grouped as by each group of following mass percent: Cr 20-28%, Al 4-
6%, V 3-5%, Ti 0.05-0.1%, Y 0.3-0.5%, Si 0.1-0.5%, W 0.1-0.5%, remaining is Fe and miscellaneous
Matter, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.The high temperature that material can be improved in W is strong
Degree improves creep resistance, extends the materials'use service life.
A kind of preparation method of electrothermal alloy, specific steps are as follows:
(1) each raw material component is weighed in proportion, in argon atmosphere, according to Fe, Cr, Al, V, rare earth element, active element
And the sequence melting of remaining component, then pour into alloy pig；
(2) alloy pig is subjected to first time annealing under protection of argon gas；
(3) alloy pig after annealing is forged into blank, 1250 DEG C of starting forging temperature, final forging temperature is greater than 1100 DEG C；
(4) blank is subjected to gren rod, 1200 DEG C of start rolling temperature, finishing temperature is greater than 900 DEG C；
(5) gren rod is carried out to second under protection of argon gas to make annealing treatment；
(6) multi pass drawing is carried out to gren rod, obtains electrothermal alloy silk material；
(7) oxide skin and rust on electrothermal alloy silk material surface are removed by pickling；
(8) electrothermal alloy silk material is subjected to third time annealing under protection of argon gas.
Test proves, contributes to form uniform and stable alloy compositions in strict accordance with the melting feeding sequence in step (1),
And then improve resistance to high temperature corrosion performance.Annealing in step (2), (5) and (8) helps to eliminate processing hardening and remaining
Internal stress, stable dimensions, Reducing distortion and crackle tendency.
Preferably, the temperature of annealing is 900-1000 DEG C for the first time in above-mentioned steps (2).First time annealing temperature
It is 900-1000 DEG C, is recrystallized, advantageously reduce hardness, improves the processing performance of material.
Preferably, the temperature of second of annealing is 700-770 DEG C in above-mentioned steps (5).Gren rod is carried out
Second of annealing avoids occurring being broken when subsequent drawing or embrittlement, experiment shows so that material internal crystal grain homogenizes
When being heated to 900 DEG C or more, crystal grain can rapidly increase, so that the properties to material adversely affect, therefore, the application
When carrying out second of annealing to gren rod, using 700-770 DEG C for the treatment of temperature, lesser crystal grain is controlled.
Preferably, the temperature of third time annealing is 500-600 DEG C in above-mentioned steps (8).To the electric heating after drawing
Alloy wire carries out third time annealing, eliminates the internal stress generated in drawing process, homogenizes tissue, improves the power of material
Learn performance.
The present invention is with following the utility model has the advantages that it is long to reduce crystal grain by adding V come refining alloy crystal grain by (1) present invention
Big tendency, and the additive amount of V helps to obtain the temperature-coefficient of electrical resistance told somebody what one's real intentions are in 3-5%；
(2) present invention improves the thermal stability of material by adding rare earth element, refines crystal grain, improves elevated temperature strength and resists
Creep properties enhances oxidation resistance, improves heat, cold-forming property, improves lumber recovery；
(3) present invention increases the room temperature intensity of resistivity and alloy material by adding the Si of 0.1-0.5%, improves material
The medium temperature oxidation resistance of material, reduces the loss of Al and rare earth element, and the high temperature that can reduce material inhales nitrogen situation, avoids material
Brittleness increases caused by material inhales nitrogen because of high temperature, while excessively high Si content being avoided to influence Al2O3The integrality of oxidation film, and then influence
Antiseptic property；
(4) addition of Co, Nb, Mo, W help to improve the elevated temperature strength of material, improve creep resistance, extend materials'use
Service life；
(5) present invention facilitates according to the sequence melting of Fe, Cr, Al, V, rare earth element, active element and remaining component
Uniform and stable alloy compositions are formed, and then improve resistance to high temperature corrosion performance, electrothermal alloy silk material is prepared and carries out in the process three times
Annealing, helps to obtain that processing performance is good, and crystal grain is uniform, tiny, and mechanical property is good, elevated temperature strength and creep-resistant property are strong
Alloy material.
Specific embodiment
Presently in connection with embodiment, the present invention is described in further detail.
The preparation method of electrothermal alloy, specific steps are as follows:
(1) each raw material component is weighed in proportion, in argon atmosphere, according to Fe, Cr, Al, V, rare earth element, active element
And the sequence melting of remaining component, then pour into alloy pig；
(2) alloy pig is subjected to first time annealing under protection of argon gas；
(3) alloy pig after annealing is forged into blank, 1250 DEG C of starting forging temperature, final forging temperature is greater than 1100 DEG C；
(4) blank is subjected to gren rod, 1200 DEG C of start rolling temperature, finishing temperature is greater than 900 DEG C；
(5) gren rod is carried out to second under protection of argon gas to make annealing treatment；
(6) multi pass drawing is carried out to gren rod, obtains electrothermal alloy silk material；
(7) oxide skin and rust on electrothermal alloy silk material surface are removed by pickling；
(8) electrothermal alloy silk material is subjected to third time annealing under protection of argon gas.
Wherein, the temperature of annealing is 900-1000 DEG C for the first time in step (2).
Wherein, the temperature of second of annealing is 700-770 DEG C in step (5).
Wherein, the temperature of third time annealing is 500-600 DEG C in step (8).
See Table 1 for details for each component and its parts by weight dosage of embodiment 1-4.
Table 1
See Table 2 for details for each component and its parts by weight dosage of comparative example 1-12.
Table 2
Comparative example 13 is substantially the same manner as Example 1, the difference is that, it is according to Cr, Al, V, rare earth member in step (1)
The sequence melting of element, Fe, active element and remaining component.
Comparative example 14 is substantially the same manner as Example 1, the difference is that, be in step (1) according to Fe, Cr, active element,
The sequence melting of rare earth element, Al, V and remaining component.
Comparative example 15 is substantially the same manner as Example 1, the difference is that, it is according to Fe, Cr, V, activity member in step (1)
The sequence melting of element, rare earth element, Al and remaining component.
Comparative example 16 is substantially the same manner as Example 1, the difference is that, it is by all components melting simultaneously in step (1).
Comparative example 17, it is substantially the same manner as Example 1, the difference is that, electrothermal alloy silk material during the preparation process not into
Row step (8).
Table 3 is the mechanical property of hot spray wire prepared by embodiment 1-4 and comparative example 1-17.
Table 3
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of electrothermal alloy, it is characterised in that: be grouped as by each group of following mass percent: Cr 20-28%, Al 4-
6%, V 3-5%, Ti 0.05-0.1%, rare earth element 0.3-0.5%, active element 0.1-1%, remaining is Fe and impurity,
In, impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.
2. electrothermal alloy as described in claim 1, it is characterised in that: the rare earth element is one of Y, La, Ce or several
Kind, the active element is one or more of Si, Co, Nb, Mo, W.
3. electrothermal alloy as claimed in claim 2, it is characterised in that: the electrothermal alloy by following mass percent each group
It is grouped as: Cr 20-28%, Al 4-6%, V 3-5%, Ti 0.05-0.1%, Y0.3-0.5%, Si 0.1-0.5%, remaining
For Fe and impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.
4. electrothermal alloy as described in claim 1, it is characterised in that: the electrothermal alloy by following mass percent each group
It is grouped as: Cr 20-28%, Al 4-6%, V 3-5%, Ti 0.05-0.1%, La 0.3-0.5%, Co 0.1-0.5%, Mo
0.1-0.5%, remaining is Fe and impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.
5. electrothermal alloy as described in claim 1, it is characterised in that: the electrothermal alloy by following mass percent each group
It is grouped as: Cr 20-28%, Al 4-6%, V 3-5%, Ti 0.05-0.1%, La+Ce 0.3-0.5%, Nb 0.1-
0.5%, Mo 0.1-0.5%, remaining is Fe and impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S
≤ 0.02%.
6. electrothermal alloy as described in claim 1, it is characterised in that: the electrothermal alloy by following mass percent each group
It is grouped as: Cr 20-28%, Al 4-6%, V 3-5%, Ti 0.05-0.1%, Y 0.3-0.5%, Si 0.1-0.5%, W
0.1-0.5%, remaining is Fe and impurity, wherein impurity are as follows: C≤0.03%, O≤0.02%, P≤0.02%, S≤0.02%.
7. the preparation method of electrothermal alloy as claimed in any one of claims 1 to 6, it is characterised in that: specific steps are as follows:
(1) weigh each raw material component in proportion, in argon atmosphere, according to Fe, Cr, Al, V, rare earth element, active element and its
The sequence melting of remaining component, then pours into alloy pig；
(2) alloy pig is subjected to first time annealing under protection of argon gas；
(3) alloy pig after annealing is forged into blank, 1250 DEG C of starting forging temperature, final forging temperature is greater than 1100 DEG C；
(4) blank is subjected to gren rod, 1200 DEG C of start rolling temperature, finishing temperature is greater than 900 DEG C；
(5) gren rod is carried out to second under protection of argon gas to make annealing treatment；
(6) multi pass drawing is carried out to gren rod, obtains electrothermal alloy silk material；
(7) oxide skin and rust on electrothermal alloy silk material surface are removed by pickling；
(8) electrothermal alloy silk material is subjected to third time annealing under protection of argon gas.
8. such as the preparation method of the described in any item electrothermal alloys of claim 7, it is characterised in that: first in the step (2)
The temperature of secondary annealing is 900-1000 DEG C.
9. electrothermal alloy as claimed in claim 7, it is characterised in that: the temperature of second of annealing in the step (5)
It is 700-770 DEG C.
10. electrothermal alloy as claimed in claim 7, it is characterised in that: the temperature of third time annealing in the step (8)
It is 500-600 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825777A (en) * | 2019-04-01 | 2019-05-31 | 江苏兄弟合金有限公司 | A kind of preparation method of high tenacity Fe-based perovskite-like oxide |
| CN112522545A (en) * | 2020-11-27 | 2021-03-19 | 成都先进金属材料产业技术研究院有限公司 | Nickel-chromium high-resistance electrothermal alloy |
| CN113073234A (en) * | 2021-03-23 | 2021-07-06 | 成都先进金属材料产业技术研究院股份有限公司 | Nickel-chromium high-resistance electrothermal alloy and preparation method thereof |
| CN113802052A (en) * | 2020-06-16 | 2021-12-17 | 全球能源互联网研究院有限公司 | Fe-Cr-Al electrothermal alloy material containing Er element |
| CN116891955A (en) * | 2023-09-11 | 2023-10-17 | 成都先进金属材料产业技术研究院股份有限公司 | Cold working and heat treatment method of Ni-Cr electrothermal alloy hot rolled wire rod |
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Cited By (7)
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|---|---|---|---|---|
| CN109825777A (en) * | 2019-04-01 | 2019-05-31 | 江苏兄弟合金有限公司 | A kind of preparation method of high tenacity Fe-based perovskite-like oxide |
| CN113802052A (en) * | 2020-06-16 | 2021-12-17 | 全球能源互联网研究院有限公司 | Fe-Cr-Al electrothermal alloy material containing Er element |
| CN112522545A (en) * | 2020-11-27 | 2021-03-19 | 成都先进金属材料产业技术研究院有限公司 | Nickel-chromium high-resistance electrothermal alloy |
| CN113073234A (en) * | 2021-03-23 | 2021-07-06 | 成都先进金属材料产业技术研究院股份有限公司 | Nickel-chromium high-resistance electrothermal alloy and preparation method thereof |
| CN113073234B (en) * | 2021-03-23 | 2022-05-24 | 成都先进金属材料产业技术研究院股份有限公司 | Nickel-chromium high-resistance electrothermal alloy and preparation method thereof |
| CN116891955A (en) * | 2023-09-11 | 2023-10-17 | 成都先进金属材料产业技术研究院股份有限公司 | Cold working and heat treatment method of Ni-Cr electrothermal alloy hot rolled wire rod |
| CN116891955B (en) * | 2023-09-11 | 2023-12-01 | 成都先进金属材料产业技术研究院股份有限公司 | Cold working and heat treatment method of Ni-Cr electrothermal alloy hot rolled wire rod |
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