CN111101024A - Energy-saving nickel-based alloy heating wire and production process thereof - Google Patents
Energy-saving nickel-based alloy heating wire and production process thereof Download PDFInfo
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- CN111101024A CN111101024A CN201911365667.0A CN201911365667A CN111101024A CN 111101024 A CN111101024 A CN 111101024A CN 201911365667 A CN201911365667 A CN 201911365667A CN 111101024 A CN111101024 A CN 111101024A
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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
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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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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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
Abstract
The invention provides an energy-saving nickel-based alloy heating wire, which comprises a core wire and a glue layer for coating the core wire, wherein the core wire is made of a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.0-1.5 wt%, Cr: 13.5 to 15.5 wt%, Mo: 7.0-9.0 wt%, Cu: 3.5-5.5 wt%, W: 3.5-4.5 wt%, Nb: 1.5-2.5 wt%, Si: 2.0-3.0 wt%, B: 0.2 to 1.0 wt%, Ba: 0.2-1.0 wt%, In: 0.2-1.0 wt%, P: 0.5-1.0 wt%, Ni: and (4) the balance. The heating wire provided by the invention has the advantages that the core wire is reasonable in production process parameters, and has good plasticity and strength.
Description
Technical Field
The invention belongs to the field of alloy preparation, and particularly relates to an energy-saving nickel-based alloy heating wire and a production process thereof.
Background
The nickel-based alloy is an alloy with comprehensive properties such as high strength, certain oxidation and corrosion resistance and the like at a high temperature of 650-1000 ℃. The alloy is further divided into nickel-based heat-resisting alloy, nickel-based corrosion-resisting alloy, nickel-based wear-resisting alloy, nickel-based precision alloy, nickel-based shape memory alloy and the like according to the main properties. The high-temperature alloy is divided into the following components according to different matrixes: iron-based superalloys, nickel-based superalloys and cobalt-based superalloys. Wherein the nickel-based superalloy is referred to as nickel-based alloy for short.
The heating wire uses resistance material as heating source, and the outer layer is covered with soft insulating material, so that it can be used for making various electric heating elements for auxiliary heating of domestic or industrial electric appliances. The heating wire can be divided into a ceramic heating wire, a carbon fiber heating wire, a silicon rubber heating wire and a PVC heating wire according to main materials. Has the characteristics that: 1. the spectrum radiation matching absorption characteristic is good, the radiation performance is unchanged after long-term use, the electric heat conversion efficiency is high, and the energy is saved by about 30 percent compared with the common electric heating piece. 2. The working temperature is high, the selection range is wide, and the temperature can be up to 1000 ℃. 3. The temperature rise is fast, the thermal inertia is small, the high temperature resistance is realized, the corrosion resistance is realized, the thermochemical property is good, the service life is long, and the insulating strength is high. 4. No pollution, and is a clean heater. Therefore, the electric heating element can be used for manufacturing electric heating elements with various shapes and is widely applied to household appliances such as refrigerators, freezers, air conditioners, water dispensers, electric cookers and the like.
The nickel-chromium heating wire has strong oxidation resistance, but the furnace contains various gases such as air, carbon atmosphere, sulfur atmosphere, hydrogen atmosphere, nitrogen atmosphere and the like, which have certain influence on elements under high-temperature use, and although various electrothermal alloys are subjected to oxidation resistance treatment before leaving the factory, the elements are damaged to a certain extent in links such as transportation, winding, installation and the like, so that the service life is shortened.
Disclosure of Invention
The invention provides an energy-saving nickel-based alloy heating wire, which further improves the refining effect In the aspects of Al-Ba-Sr-In metallographic mode, desulfuration phosphorus capability and the like, further improves the performance of the nickel-based high-temperature alloy heating wire, and prolongs the service life of the heating wire.
The invention is realized by the following technical scheme.
The energy-saving nickel-based alloy heating wire comprises a core wire and a glue layer for coating the core wire, wherein the core wire is a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.0-1.5 wt%, Cr: 13.5 to 15.5 wt%, Mo: 7.0-9.0 wt%, Cu: 3.5-5.5 wt%, W: 3.5-4.5 wt%, Nb: 1.5-2.5 wt%, Si: 2.0-3.0 wt%, B: 0.2 to 1.0 wt%, Ba: 0.2-1.0 wt%, In: 0.2-1.0 wt%, P: 0.5-1.0 wt%, Ni: and (4) the balance.
Preferably, the nickel-based alloy comprises the following components in percentage by weight: c: 1.3 wt%, Cr: 14 wt%, Mo: 8 wt%, Cu: 4 wt%, W: 4 wt%, Nb: 2 wt%, Si: 2.5 wt%, B: 0.8 wt%, Ba: 0.8 wt%, In: 0.8 wt%, P: 0.8 wt%, Ni: and (4) the balance.
The production process of the energy-saving nickel-based alloy heating wire comprises the step of preparing a core wire, wherein the preparation of the core wire comprises the following steps
Step one, preparing raw materials;
step two, vacuum melting: putting the nickel and the copper prepared in the step one into a crucible of a vacuum smelting furnace, putting the other raw materials into a hopper respectively for putting, checking the vacuum smelting furnace and heating, starting to add the other raw materials after the nickel and the copper are completely molten, refining after the addition is finished, adding a degasifier, calming after the refining, carrying out live pouring, wherein the pouring temperature is 1350 and 1400 ℃, cooling along with the furnace after the pouring is finished, and discharging the molten alloy after the vacuum is broken;
step three, hot forging: casting the melt obtained after vacuum melting in the step two, and then performing hot forging, wherein the heating temperature is 800-850 ℃, and the heat preservation time is 40-45min, so as to obtain a square forging stock;
step four, hot rolling: hot rolling the square forging stock obtained in the step three into a wire rod with the diameter of 7-8 mm;
step five, alkali washing and acid washing: performing alkali washing and acid washing on the wire rod obtained in the step four;
and step six, carrying out wire drawing and annealing treatment on the wire rod annealed in the step six in sequence.
Preferably, the wire drawing and annealing treatment in the sixth step is as follows: drawing the wire rod to the required diameter of the alloy wire by three times; drawing the wire for the first time to 4.5mm in diameter, wherein the annealing temperature after the first wire drawing is 550 ℃, and the annealing time is 1.5 h; drawing the wire for the second time to the diameter of 1.0mm, wherein the annealing temperature after the second wire drawing is 530 ℃, and the annealing time is 1 h; drawing the wire to 0.45mm diameter for the third time; the annealing temperature is 580 ℃, and the annealing time is 1 h.
Preferably, the solvent for the alkaline washing in the step five comprises the following components: 30-35% of sodium hydroxide, 5-10% of sodium bicarbonate, 5-10% of triethylamine and the balance of water.
Preferably, the solvent for acid washing in the step five comprises the following components: 5-10% of acetic acid, 30-40% of concentrated sulfuric acid, 20-25% of nitric acid and the balance of water
Preferably, the degasifier in the second step is Al-CaCO3+ chlorine gas.
Preferably, the refining conditions in the second step are heated to 1500-.
The invention has the beneficial effects that:
the core wire in the heating wire has good plasticity and strength. The core wire has high nickel content, relatively reduced chromium content and more strengthening phases, so the nickel alloy has excellent comprehensive performance. Meanwhile, the core wire has qualified components, the strength and the plasticity index meet the requirements of national standards, the core wire has good structure performance, is compact and uniform, does not have large inclusions which seriously affect the alloy, has few pores loose in the metallurgical process, is reasonably determined by hot working parameters, and does not have the adverse phenomena of oxidation, decarburization and the like.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1
The energy-saving nickel-based alloy heating wire comprises a core wire and a glue layer for coating the core wire, wherein the core wire is a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.0 wt%, Cr: 13.5 wt%, Mo: 7.0 wt%, Cu: 3.5 wt%, W: 3.5 wt%, Nb: 1.5 wt%, Si: 2.0 wt%, B: 0.2 wt%, Ba: 0.2 wt%, In: 0.2 wt%, P: 0.5 wt%, Ni: and (4) the balance.
The production process of the energy-saving nickel-based alloy heating wire comprises the step of preparing a core wire, wherein the preparation of the core wire comprises the following steps
Step one, preparing raw materials;
step two, vacuum melting: putting the nickel and the copper prepared in the step one intoPutting the rest raw materials into a crucible of a vacuum smelting furnace respectively for later input, checking the vacuum smelting furnace and heating to ensure that the rest raw materials are added after the nickel and the copper are completely melted, refining after the addition is finished, adding a degasifier, refining at the temperature of 1500 plus 1550 ℃ for 3h, calming after the refining, then carrying out live pouring at the pouring temperature of 1350 ℃, cooling along with the furnace after the pouring is finished, breaking the vacuum and then discharging; the degasifier is Al-CaCO3+ chlorine gas, the adding amount is 1 percent of the total amount of the alloy raw material, wherein Al and CaCO3And chlorine gas accounts for 20%, 30% and 50% of the degasifier respectively.
Step three, hot forging: casting the melt obtained after vacuum melting in the step two, and then performing hot forging, wherein the heating temperature is 800-850 ℃, and the heat preservation time is 40-45min, so as to obtain a square forging stock;
step four, hot rolling: hot rolling the square forging stock obtained in the step three into a wire rod with the diameter of 7-8 mm;
step five, alkali washing and acid washing: performing alkali washing and acid washing on the wire rod obtained in the step four; the solvent for alkaline washing comprises the following components: 30% of sodium hydroxide, 5% of sodium bicarbonate, 5% of triethylamine and the balance of water. The pickling solvent comprises the following components: 5% acetic acid, 30% concentrated sulfuric acid, 20% nitric acid and the balance of water
Step six, carrying out wire drawing and annealing treatment on the wire rod annealed in the step six in sequence, and drawing the wire rod to the required diameter of the alloy wire by three times; drawing the wire for the first time to 4.5mm in diameter, wherein the annealing temperature after the first wire drawing is 550 ℃, and the annealing time is 1.5 h; drawing the wire for the second time to the diameter of 1.0mm, wherein the annealing temperature after the second wire drawing is 530 ℃, and the annealing time is 1 h; drawing the wire to 0.45mm diameter for the third time; the annealing temperature is 580 ℃, and the annealing time is 1 h.
Example 2
The energy-saving nickel-based alloy heating wire comprises a core wire and a glue layer for coating the core wire, wherein the core wire is a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.3 wt%, Cr: 14 wt%, Mo: 8 wt%, Cu: 4 wt%, W: 4 wt%, Nb: 2 wt%, Si: 2.5 wt%, B: 0.8 wt%, Ba: 0.8 wt%, In: 0.8 wt%, P: 0.8 wt%, Ni: and (4) the balance.
The production process of the energy-saving nickel-based alloy heating wire comprises the step of preparing a core wire, wherein the preparation of the core wire comprises the following steps
Step one, preparing raw materials;
step two, vacuum melting: putting the nickel and the copper prepared in the step one into a crucible of a vacuum smelting furnace, putting the other raw materials into a hopper respectively for putting, checking the vacuum smelting furnace and heating, starting to add the other raw materials after the nickel and the copper are completely molten, refining after the charging is finished, adding a degasifier, refining at the temperature of 1500-; the degasifier is Al-CaCO3+ chlorine gas, the amount of added is 1.5% of the total amount of the alloy raw material, wherein Al and CaCO3And chlorine gas accounts for 20%, 30% and 50% of the degasifier respectively.
Step three, hot forging: casting the melt obtained after vacuum melting in the step two, and then performing hot forging, wherein the heating temperature is 800-850 ℃, and the heat preservation time is 42min, so as to obtain a square forging stock;
step four, hot rolling: hot rolling the square forging stock obtained in the step three into a wire rod with the diameter of 7-8 mm;
step five, alkali washing and acid washing: performing alkali washing and acid washing on the wire rod obtained in the step four; the solvent for alkaline washing comprises the following components: 33% of sodium hydroxide, 8% of sodium bicarbonate, 8% of triethylamine and the balance of water. The pickling solvent comprises the following components: 8% acetic acid, 35% concentrated sulfuric acid, 23% nitric acid and the balance of water
Step six, carrying out wire drawing and annealing treatment on the wire rod annealed in the step six in sequence, and drawing the wire rod to the required diameter of the alloy wire by three times; drawing the wire for the first time to 4.5mm in diameter, wherein the annealing temperature after the first wire drawing is 550 ℃, and the annealing time is 1.5 h; drawing the wire for the second time to the diameter of 1.0mm, wherein the annealing temperature after the second wire drawing is 530 ℃, and the annealing time is 1 h; drawing the wire to 0.45mm diameter for the third time; the annealing temperature is 580 ℃, and the annealing time is 1 h.
Example 3
The energy-saving nickel-based alloy heating wire comprises a core wire and a glue layer for coating the core wire, wherein the core wire is a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.5 wt%, Cr: 15.5 wt%, Mo: 9.0 wt%, Cu: 5.5 wt%, W: 4.5 wt%, Nb: 2.5 wt%, Si: 3.0 wt%, B: 1.0 wt%, Ba: 1.0 wt%, In: 1.0 wt%, P: 1.0 wt%, Ni: and (4) the balance.
The production process of the energy-saving nickel-based alloy heating wire comprises the step of preparing a core wire, wherein the preparation of the core wire comprises the following steps
Step one, preparing raw materials;
step two, vacuum melting: putting the nickel and the copper prepared in the step one into a crucible of a vacuum smelting furnace, putting the other raw materials into a hopper respectively for putting, checking the vacuum smelting furnace and heating, starting to add the other raw materials after the nickel and the copper are completely molten, refining after the charging is finished, adding a degasifier, refining at the temperature of 1500-; the degasifier is Al-CaCO3+ chlorine gas added in 2% of the total amount of the alloy material, wherein Al and CaCO3And chlorine gas accounts for 20%, 30% and 50% of the degasifier respectively.
Step three, hot forging: casting the melt obtained after vacuum melting in the step two, and then performing hot forging, wherein the heating temperature is 800-850 ℃, and the heat preservation time is 40-45min, so as to obtain a square forging stock;
step four, hot rolling: hot rolling the square forging stock obtained in the step three into a wire rod with the diameter of 7-8 mm;
step five, alkali washing and acid washing: performing alkali washing and acid washing on the wire rod obtained in the step four; the solvent for alkaline washing comprises the following components: 35% of sodium hydroxide, 10% of sodium bicarbonate, 10% of triethylamine and the balance of water. The pickling solvent comprises the following components: 10% acetic acid, 40% concentrated sulfuric acid, 25% nitric acid and the balance of water
Step six, carrying out wire drawing and annealing treatment on the wire rod annealed in the step six in sequence, and drawing the wire rod to the required diameter of the alloy wire by three times; drawing the wire for the first time to 4.5mm in diameter, wherein the annealing temperature after the first wire drawing is 550 ℃, and the annealing time is 1.5 h; drawing the wire for the second time to the diameter of 1.0mm, wherein the annealing temperature after the second wire drawing is 530 ℃, and the annealing time is 1 h; drawing the wire to 0.45mm diameter for the third time; the annealing temperature is 580 ℃, and the annealing time is 1 h.
Comparative example 1
The process was carried out under the conditions of example 2, in which no degasifier was added in step S2 in the production process, and others were the same;
comparative example 2
The process was carried out under the conditions of example 2, in which alkali washing and acid washing were not carried out in step S2 in the production process, and others were the same;
the mechanical properties are specified in Table 1 below
As can be seen from table 1, the core wire has good plasticity and strength. The core wire has high nickel content, relatively reduced chromium content and more strengthening phases, so the nickel alloy has excellent comprehensive performance. Meanwhile, the core wire has qualified components, the strength and the plasticity index meet the requirements of national standards, the core wire has good structure performance, is compact and uniform, does not have large inclusions which seriously affect the alloy, has few pores loose in the metallurgical process, has reasonable thermal processing parameter determination, does not have the adverse phenomena of oxidation, decarbonization and the like, has good surface quality of the drawn wire finished product, and has reasonable production process parameters.
In the core wire raw materials of the invention, Al, In and chlorine all have the deoxidation effect on the alloy melt, and the alloy melt is more deoxidized than single Al-CaCO3Has strong deoxidation capability.
Meanwhile, In is introduced into the nickel-base high-temperature alloy material, and has the effects of purifying and deoxidizing, desulfurizing and dephosphorizing products and deteriorating inclusions, so that the performance of the nickel-base high-temperature alloy material is further improved.
The information of the examples 1 to 3 and the comparative examples 1 to 2 is tested according to the requirement of the alloy brand new product KSC, and the test results are shown in the following table 2:
TABLE 2
As can be seen from Table 2, the products of examples 1-3, after the addition of the deaerator, have improved the detection temperature, fast life and elongation to a greater extent; meanwhile, the temperature, the quick service life and the elongation rate are improved in a small range after acid washing and alkali washing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (8)
1. The energy-saving nickel-based alloy heating wire comprises a core wire and a glue layer for coating the core wire, and is characterized in that the core wire is a nickel-based alloy, and the nickel-based alloy comprises the following components in percentage by weight: c: 1.0-1.5 wt%, Cr: 13.5 to 15.5 wt%, Mo: 7.0-9.0 wt%, Cu: 3.5-5.5 wt%, W: 3.5-4.5 wt%, Nb: 1.5-2.5 wt%, Si: 2.0-3.0 wt%, B: 0.2 to 1.0 wt%, Ba: 0.2-1.0 wt%, In: 0.2-1.0 wt%, P: 0.5-1.0 wt%, Ni: and (4) the balance.
2. The energy-saving nickel-based alloy heating wire according to claim 1, wherein the nickel-based alloy comprises the following components in percentage by weight: c: 1.3 wt%, Cr: 14 wt%, Mo: 8 wt%, Cu: 4 wt%, W: 4 wt%, Nb: 2 wt%, Si: 2.5 wt%, B: 0.8 wt%, Ba: 0.8 wt%, In: 0.8 wt%, P: 0.8 wt%, Ni: and (4) the balance.
3. A process for manufacturing an energy saving type nickel base alloy heating wire as set forth in claim 1, comprising the steps of:
step one, preparing raw materials;
step two, vacuum melting: putting the nickel and the copper prepared in the step one into a crucible of a vacuum smelting furnace, putting the other raw materials into a hopper respectively for putting, checking the vacuum smelting furnace and heating, starting to add the other raw materials after the nickel and the copper are completely molten, refining after the addition is finished, adding a degasifier, calming after the refining, carrying out live pouring, wherein the pouring temperature is 1350 and 1400 ℃, cooling along with the furnace after the pouring is finished, and discharging the molten alloy after the vacuum is broken;
step three, hot forging: casting the melt obtained after vacuum melting in the step two, and then performing hot forging, wherein the heating temperature is 800-850 ℃, and the heat preservation time is 40-45min, so as to obtain a square forging stock;
step four, hot rolling: hot rolling the square forging stock obtained in the step three into a wire rod with the diameter of 7-8 mm;
step five, alkali washing and acid washing: performing alkali washing and acid washing on the wire rod obtained in the step four;
and step six, carrying out wire drawing and annealing treatment on the wire rod annealed in the step six in sequence.
4. The process for producing an energy-saving nickel-base alloy heating wire as claimed in claim 3, wherein the drawing and annealing treatment of the sixth step is: drawing the wire rod to the required diameter of the alloy wire by three times; drawing the wire for the first time to 4.5mm in diameter, wherein the annealing temperature after the first wire drawing is 550 ℃, and the annealing time is 1.5 h; drawing the wire for the second time to the diameter of 1.0mm, wherein the annealing temperature after the second wire drawing is 530 ℃, and the annealing time is 1 h; drawing the wire to 0.45mm diameter for the third time; the annealing temperature is 580 ℃, and the annealing time is 1 h.
5. The production process of the energy-saving nickel-base alloy heating wire as claimed in claim 3, wherein the solvent for alkali washing in the fifth step comprises the following components: 30-35% of sodium hydroxide, 5-10% of sodium bicarbonate, 5-10% of triethylamine and the balance of water.
6. The process for producing an energy-saving nickel-base alloy heating wire as claimed in claim 3, wherein the solvent for pickling in the fifth step comprises the following components: 5-10% of acetic acid, 30-40% of concentrated sulfuric acid, 20-25% of nitric acid and the balance of water.
7. The process for producing an energy-saving Ni-based alloy heater wire as claimed in claim 3, wherein the getter in the second step is Al-CaCO3+ chlorine gas.
8. The process for producing an energy-saving nickel-based alloy heating wire as claimed in claim 3, wherein the refining conditions in the second step are heated to 1500-.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116970896A (en) * | 2023-09-22 | 2023-10-31 | 成都先进金属材料产业技术研究院股份有限公司 | Method for improving pre-oxidation effect of Ni-Cr electrothermal alloy product |
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| CN105695795A (en) * | 2016-03-09 | 2016-06-22 | 江阴市诚信合金材料有限公司 | High-strength and low-resistance alloy wire and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116970896A (en) * | 2023-09-22 | 2023-10-31 | 成都先进金属材料产业技术研究院股份有限公司 | Method for improving pre-oxidation effect of Ni-Cr electrothermal alloy product |
| CN116970896B (en) * | 2023-09-22 | 2024-02-02 | 成都先进金属材料产业技术研究院股份有限公司 | Method for improving pre-oxidation effect of Ni-Cr electrothermal alloy product |
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