CN108441710A - A kind of preparation process of high-performance nichrome - Google Patents
A kind of preparation process of high-performance nichrome Download PDFInfo
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- CN108441710A CN108441710A CN201810528007.9A CN201810528007A CN108441710A CN 108441710 A CN108441710 A CN 108441710A CN 201810528007 A CN201810528007 A CN 201810528007A CN 108441710 A CN108441710 A CN 108441710A
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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
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
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Abstract
A kind of preparation process of high-performance nichrome of the present invention, steps are as follows：1）It is calculated by the weight percent of ingredient and carries out raw material preparation：2）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts；3）Slag making；4) deoxidier is prepared, the weight ratio by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and carborundum powder is 3:5:8；5）Deoxidation；6）Gren rod；7）Annealing；8）Rinsing；9）Multi pass drawing is carried out after rinsing obtains high-performance nichrome.High-performance nichrome finished product prepared by the present invention has resistivity that is higher and stablizing, and corrosion-resistant, surface oxidation-resistant performance is good.The present invention uses special double deoxidizer, the mixing deoxidier mixed using three kinds of deoxidiers good for the deoxidation effect of electrothermal alloy.
Description
Technical field
The present invention is more particularly directed to a kind of preparation processes of high-performance nichrome.
Background technology
Electrothermal alloy refers to the electric resistance alloy that heater is made using the resistance characteristic of metal.It is widely used in various industrial electros
The electrical heating elements of stove, furnace for testing room and household electrical appliance.
When electric current I when resistance R by generating Joule heat.Electrothermal alloy is exactly to be converted to thermal characteristics using this electric energy
Electric resistance alloy.The application of either industrial production or daily life, electric heater is all very extensive, and exothermic material is electricity
Thermalloy.The electrothermal alloy generally smaller temperature-coefficient of electrical resistance with higher resistivity and stabilization, can be generated by electric current
Higher heat and the power stablized.
It is also higher and higher for the alloy material requirement of resistance wire with the development of electric heater industry, more and more
Research staff focuses on developing a kind of high temperature oxidation resistance, corrosion resistance, elevated temperature strength, service life, the equal energy of processing performance
Enough the alloy material with excellent effect is researched and developed.
Invention content
The present invention proposes a kind of preparation process of high-performance nichrome regarding to the issue above.
Specific technical solution is as follows：
A kind of preparation process of high-performance nichrome, which is characterized in that steps are as follows：
1）It is calculated by the weight percent of ingredient and carries out raw material preparation：
C：≤0.08%；Si：0.75~1.6%；Mn：≤0.6%；
P： 0.02%；S： ≤0.015%；Cr：15~18%；
Al：≤0.5%；Ni：55~61%；
Surplus is Fe；
2）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts, and smelting temperature is controlled at 1300 DEG C~1640 DEG C, smelting
Between 1H, obtain molten metal at this time, the lime for accounting for molten metal 6.3wt% be added, be warming up to 1500 DEG C~1600 DEG C, keep 2~
3min；
3）The fluorite material slag making for accounting for molten metal 3.2wt%, 1~2min of recovery time is added in slag making in intermediate frequency furnace；
4) deoxidier is prepared, by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and silicon carbide
The weight ratio of powder is 3:5:8；
5）Deoxidier is added in intermediate frequency furnace and carries out deoxidation for deoxidation, and the addition of deoxidier is 3.7~3.9Kg/t, when deoxidation
Between be 40~60min；
6）Gren rod：1300 DEG C~1440 DEG C of hot-rolled temperature, 1480 DEG C of start rolling temperature, finishing temperature are 1350 DEG C；
7）Annealing, in vacuum heat treatment furnace, vacuum degree 1 × 10-3~3 × 10-3Pa, 1200 DEG C~1300 DEG C of annealing temperature,
2~8H of annealing heat preservation；
8）Rinsing：Blank after gren rod, annealing is subjected to pickling 1~2 time, then carries out washing 1~2 time；
9）Multi pass drawing is carried out after rinsing obtains high-performance nichrome.
Further；Bentonite grain size is 300 mesh.
Further, charcoal powder grain size is 200 mesh.
Further, carborundum powder grain size is 500 mesh.
Further, for raw material using preceding needing to carry out baking processing, specific baking condition is as follows：Si：350 DEG C~450 DEG C
Baking 5 hours； Mn：350 DEG C~450 DEG C are toasted 5 hours；Cr：650 DEG C~730 DEG C are toasted 8 hours；Al：700 DEG C~800 DEG C
Baking 8 hours；Fe：350 DEG C~450 DEG C are toasted 5 hours；Ni：700 DEG C~800 DEG C are toasted 8 hours；Fluorite baking temperature is 700
DEG C~800 DEG C, the time is 6~8H.
Compared with prior art, beneficial effects of the present invention are：
High-performance nichrome finished product prepared by the present invention has resistivity that is higher and stablizing, corrosion-resistant, surface oxidation-resistant
Performance is good.The present invention uses special double deoxidizer, the mixing deoxidier mixed using three kinds of deoxidiers, for electric heating
The deoxidation effect of alloy is good.
Cr can form Cr2O3 oxidation films at high temperature, can effectively improve the high-temperature oxidation resistance of product, to
Improve the service life of product；For the present invention by carrying out previously baked processing to raw material, cooperation slag making, deoxidation can be effectively
Reduce the non-metallic inclusion in aluminium alloy.The lectrothermal alloy wire prepared using the method for the present invention, field trash total amount are reduced
30%, field trash pattern tends to be regular, and size also greatly reduces.
Specific implementation mode
It is clear to make technical scheme of the present invention be more clear, below the present invention is described further, it is any to this
The technical characteristic of inventive technique scheme carries out the scheme that equivalencing is obtained with conventional reasoning and each falls within the scope of the present invention.
Bentonite grain size employed in the embodiment of the present invention is 300 mesh.Charcoal powder grain size is 200 mesh.Carborundum powder
Grain size is 500 mesh.
Embodiment 1
A kind of preparation process of high-performance nichrome, which is characterized in that steps are as follows：
1）It is calculated by the weight percent of ingredient and carries out raw material preparation：
C： 0.085；Si：0.9% ；Mn：0.5%；
P： 0.02%；S： 0.01%；Cr：16 %；
Al： 0.3%；Ni：59%；Fe: 23.185%；
Surplus is Fe；
2）Pretreatment of raw material, by part material using preceding needing to carry out baking processing, specific baking condition is as follows：Si：400 DEG C of bakings
It is 5 hours roasting； Mn：400 DEG C are toasted 5 hours；Cr：700 DEG C are toasted 8 hours；Al：It toasts 8 hours for 700 DEG C 0；Fe：400 DEG C of bakings 5
Hour；Ni：800 DEG C are toasted 8 hours；Fluorite baking temperature is 700 DEG C, time 8H.
3）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts, and smelting temperature control is at 1440 DEG C, the duration of heat
1H obtains molten metal at this time, and the lime for accounting for molten metal 6.3wt% is added, and is warming up to 1550 DEG C, keeps 3min；
4）The fluorite material slag making for accounting for molten metal 3.2wt%, recovery time 1min is added in slag making in intermediate frequency furnace；The fluorite uses
Preceding needs carry out baking processing, and baking temperature is 750 DEG C, time 8H；
5) deoxidier is prepared, by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and silicon carbide
The weight ratio of powder is 3:5:8；
6）Deoxidier is added in intermediate frequency furnace and carries out deoxidation for deoxidation, and the addition of deoxidier is 3.8Kg/t, and deaeration time is
50min；
7）Gren rod：1340 DEG C of hot-rolled temperature, 1480 DEG C of start rolling temperature, finishing temperature are 1350 DEG C；
8）Annealing, in vacuum heat treatment furnace, 1 × 10-3Pa of vacuum degree, 1250 DEG C of annealing temperature, annealing heat preservation 7H；
9）Rinsing：Blank after gren rod, annealing is subjected to pickling 1 time, then carries out washing 2 times；
10）Multi pass drawing is carried out after rinsing obtains karmalloy.
Embodiment 2
A kind of preparation process of high-performance nichrome, which is characterized in that steps are as follows：
1）It is calculated by the weight percent of ingredient and carries out raw material preparation：
C： 0.08%；Si： 1.6% ；Mn： 0.6%；
P： 0.02%；S： 0.015%；Cr： 18%；
Al： 0.5%；Ni： 61%；Fe:18.185%；
2）Pretreatment of raw material, by part material using preceding needing to carry out baking processing, specific baking condition is as follows：Si：450 DEG C of bakings
It is 5 hours roasting； Mn：450 DEG C are toasted 5 hours；Cr：730 DEG C are toasted 8 hours；Al：800 DEG C are toasted 8 hours；Fe：450 DEG C of bakings
It is 5 hours roasting；Ni：800 DEG C are toasted 8 hours；Fluorite baking temperature is 800 DEG C, time 8H；
3）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts, and smelting temperature is controlled at 1640 DEG C, duration of heat 1H, at this time
Molten metal is obtained, the lime for accounting for molten metal 6.3wt% is added, is warming up to 1600 DEG C, keeps 3min；
4）The fluorite material slag making for accounting for molten metal 3.2wt%, recovery time 2min is added in slag making in intermediate frequency furnace；
5) deoxidier is prepared, by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and silicon carbide
The weight ratio of powder is 3:5:8；
6）Deoxidier is added in intermediate frequency furnace and carries out deoxidation for deoxidation, and the addition of deoxidier is 3.9Kg/t, and deaeration time is
60min；
7）Gren rod：1440 DEG C of hot-rolled temperature, 1480 DEG C of start rolling temperature, finishing temperature are 1350 DEG C；
8）Annealing, in vacuum heat treatment furnace, 3 × 10-3Pa of vacuum degree, 1300 DEG C of annealing temperature, annealing heat preservation 8H；
9）Rinsing：Blank after gren rod, annealing is subjected to pickling 2 times, then carries out washing 2 times；
10）Multi pass drawing is carried out after rinsing obtains karmalloy.
Embodiment 3
A kind of preparation process of high-performance nichrome, which is characterized in that steps are as follows：
1）It is calculated by the weight percent of ingredient and carries out raw material preparation：
C： 0.01%；Si：0.75% ；Mn： 0.1%；
P： 0.02%；S： 0.01%；Cr：15%；
Al： 0.1%；Ni：55%；Fe:29.01%；
Surplus is Fe；
2）Pretreatment of raw material, by part material using preceding needing to carry out baking processing, specific baking condition is as follows：Si：350 DEG C of bakings
It is 5 hours roasting； Mn：350 DEG C are toasted 5 hours；Cr：650 DEG C are toasted 8 hours；Al：700 DEG C are toasted 8 hours；Fe：350 DEG C of bakings 5
Hour；Ni：700 DEG C are toasted 8 hours；Fluorite baking temperature is 700 DEG C, time 6H；
3）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts, and smelting temperature is controlled at 1300 DEG C, duration of heat 1H, this
When obtain molten metal, the lime for accounting for molten metal 6.3wt% is added, is warming up to 1500 DEG C, keeps 2min；
4）The fluorite material slag making for accounting for molten metal 3.2wt%, recovery time 1min is added in slag making in intermediate frequency furnace；
5) deoxidier is prepared, by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and silicon carbide
The weight ratio of powder is 3:5:8；
6）Deoxidier is added in intermediate frequency furnace and carries out deoxidation for deoxidation, and the addition of deoxidier is 3.7Kg/t, and deaeration time is
40min；
7）Gren rod：1300 DEG C of hot-rolled temperature, 1480 DEG C of start rolling temperature, finishing temperature are 1350 DEG C；
8）Annealing, in vacuum heat treatment furnace, 1 × 10-3Pa of vacuum degree, 1200 DEG C of annealing temperature, annealing heat preservation 2H；
9）Rinsing：Blank after gren rod, annealing is subjected to pickling 1 time, then carries out washing 1 time；
10）Multi pass drawing is carried out after rinsing obtains karmalloy.
The performance indicator of the nichrome of embodiment 1-3
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Highest uses Warm degree DEG C | 1340 | 1100 | 1150 |
| Density g/cm3 | 8.4 | 8.1 | 8.0 |
| 20 DEG C of mm2/m of resistivity | 1.39±0.05 | 1.29±0.05 | 1.23±0.05 |
| Fusing point DEG C | 1490 | 1430 | 1340 |
| Tensile strength Mpa | 637~784 | 637~784 | 588~735 |
| Elongation percentage % | ＞ 24 | ＞ 18 | ＞ 17 |
| Section Shou Shrink rates % | 77 | 75 | 69 |
| Number of bends | ＞ 11 | ＞ 10 | ＞ 9 |
| Quick life experiment DEG C/h | 1300/100 | 1250/100 | 1150/100 |
Claims (5)
1. a kind of preparation process of high-performance nichrome, which is characterized in that steps are as follows：
1）It is calculated by the weight percent of ingredient and carries out raw material preparation：
C：≤0.08%；Si：0.75~1.6%；Mn：≤0.6%；
P： 0.02%；S： ≤0.015%；Cr：15~18%；
Al：≤0.5%；Ni：55~61%；
Surplus is Fe；
2）It will be by step 1）Preparation raw material, which is fitted into intermediate frequency furnace, smelts, and smelting temperature is controlled at 1300 DEG C~1640 DEG C, smelting
Between 1H, obtain molten metal at this time, the lime for accounting for molten metal 6.3wt% be added, be warming up to 1500 DEG C~1600 DEG C, keep 2~
3min；
3）The fluorite material slag making for accounting for molten metal 3.2wt%, 1~2min of recovery time is added in slag making in intermediate frequency furnace；
4) deoxidier is prepared, by the mixture of bentonite, charcoal powder and carborundum powder, the bentonite, charcoal powder and silicon carbide
The weight ratio of powder is 3:5:8；
5）Deoxidier is added in intermediate frequency furnace and carries out deoxidation for deoxidation, and the addition of deoxidier is 3.7~3.9Kg/t, when deoxidation
Between be 40~60min；
6）Gren rod：1300 DEG C~1440 DEG C of hot-rolled temperature, 1480 DEG C of start rolling temperature, finishing temperature are 1350 DEG C；
7）Annealing, in vacuum heat treatment furnace, vacuum degree 1 × 10-3~3 × 10-3Pa, 1200 DEG C~1300 DEG C of annealing temperature,
2~8H of annealing heat preservation；
8）Rinsing：Blank after gren rod, annealing is subjected to pickling 1~2 time, then carries out washing 1~2 time；
9）Multi pass drawing is carried out after rinsing obtains high-performance nichrome.
2. a kind of preparation process of high-performance nichrome as described in claim 1, which is characterized in that bentonite grain size is
300 mesh.
3. a kind of preparation process of high-performance nichrome as described in claim 1, which is characterized in that charcoal powder grain size is
200 mesh.
4. a kind of preparation process of high-performance nichrome as described in claim 1, which is characterized in that carborundum powder grain size
For 500 mesh.
5. a kind of preparation process of high-performance nichrome as described in claim 1, which is characterized in that raw material is using preceding needing
Baking processing is carried out, specific baking condition is as follows：Si：350 DEG C~450 DEG C are toasted 5 hours； Mn：350 DEG C~450 DEG C bakings
5 hours；Cr：650 DEG C~730 DEG C are toasted 8 hours；Al：700 DEG C~800 DEG C are toasted 8 hours；Fe：350 DEG C~450 DEG C bakings 5
Hour；Ni：700 DEG C~800 DEG C are toasted 8 hours；Fluorite baking temperature is 700 DEG C~800 DEG C, and the time is 6~8H.
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| CN201810528007.9A CN108441710A (en) | 2018-05-29 | 2018-05-29 | A kind of preparation process of high-performance nichrome |
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| CN201810528007.9A CN108441710A (en) | 2018-05-29 | 2018-05-29 | A kind of preparation process of high-performance nichrome |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454122A (en) * | 2018-11-19 | 2019-03-12 | 深圳市业展电子有限公司 | A kind of preparation process of nickel chromium triangle ferro-aluminum precision electrical resistance alloy band |
| CN111676392A (en) * | 2020-05-28 | 2020-09-18 | 北京理工大学 | Alloy material with high resistivity and high elongation and preparation method thereof |
| CN112725659A (en) * | 2020-12-22 | 2021-04-30 | 丹阳市曙光镍材有限公司 | Nickel alloy casting process based on intermediate frequency furnace |
| CN115233039A (en) * | 2022-09-21 | 2022-10-25 | 广东腐蚀科学与技术创新研究院 | Nickel-chromium-iron alloy material and preparation method and application thereof |
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| CN103276250A (en) * | 2013-05-23 | 2013-09-04 | 苏州贝思特金属制品有限公司 | Nickel-chromium-iron alloy seamless tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276250A (en) * | 2013-05-23 | 2013-09-04 | 苏州贝思特金属制品有限公司 | Nickel-chromium-iron alloy seamless tube |
| CN106077618A (en) * | 2016-08-22 | 2016-11-09 | 兰州工业学院 | The nichrome dusty material containing rare earth and application thereof for abrasive wear resistance |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454122A (en) * | 2018-11-19 | 2019-03-12 | 深圳市业展电子有限公司 | A kind of preparation process of nickel chromium triangle ferro-aluminum precision electrical resistance alloy band |
| CN111676392A (en) * | 2020-05-28 | 2020-09-18 | 北京理工大学 | Alloy material with high resistivity and high elongation and preparation method thereof |
| CN112725659A (en) * | 2020-12-22 | 2021-04-30 | 丹阳市曙光镍材有限公司 | Nickel alloy casting process based on intermediate frequency furnace |
| CN115233039A (en) * | 2022-09-21 | 2022-10-25 | 广东腐蚀科学与技术创新研究院 | Nickel-chromium-iron alloy material and preparation method and application thereof |
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