CN111112333B - Preparation method of nickel-chromium-based precision resistance alloy foil - Google Patents
Preparation method of nickel-chromium-based precision resistance alloy foil Download PDFInfo
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- CN111112333B CN111112333B CN201911401081.5A CN201911401081A CN111112333B CN 111112333 B CN111112333 B CN 111112333B CN 201911401081 A CN201911401081 A CN 201911401081A CN 111112333 B CN111112333 B CN 111112333B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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
- 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
- C22F1/11—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of chromium or alloys based thereon
Abstract
A preparation method of a nickel-chromium-based precision resistance alloy foil belongs to the technical field of resistance alloy manufacturing. Heating the flat blank for 7 or 9 passes, and carrying out hot rolling to obtain a strip blank with the thickness of 5.5-6.0 mm; carrying out homogenization annealing treatment on the strip blank, then carrying out heat preservation, and then carrying out rough rolling; rolling the polished strip blank on a four-roller rolling mill for three times to obtain a thick semi-finished product, wherein the rolling thickness is 0.45-0.50 mm, cleaning a surface abrasive belt of the strip, rolling a thin semi-finished product on a 20-roller rolling mill, and polishing the surface of the rolled strip; and finally, finish rolling on a 32-roller mill to obtain a finished foil with the thickness of 0.01-0.02 mm. The method has the advantages that the finished foil is ensured not to have the pinhole defect caused by the problem of steel purity; the surface oxide layer and the defect are treated more thoroughly; is beneficial to removing residual oxide scale particles on the surface and improving the surface quality.
Description
Technical Field
The invention belongs to the technical field of resistance alloy manufacturing, and particularly relates to a preparation method of a nickel-chromium-based precision resistance alloy foil.
Background
The development of industries such as micro-electro-mechanical, micro-manufacturing, robot, intelligent manufacturing and the like, and the advanced micro-manufacturing fields put higher and higher requirements on high-quality foils. The production capacity of the high-quality foil becomes a key for influencing micro-manufacturing and promoting the miniaturization of products, and is also one of the marks of the micro-forming and micro-manufacturing capacity of the country.
The nickel-chromium-based precision resistance alloy foil is used as a key material of the foil type strain gauge and plays a decisive role in the performance of the resistance strain gauge. In terms of the surface quality of the foil, the surface of the foil is required to be smooth, free of oxidation marks, free of cracks, free of pinholes and the like. For a long time, the core production technology of the high-quality nickel-chromium-based precision resistance alloy foil with the thickness of 0.01-0.02 mm is mastered and kept secret by a few enterprises in the United states and Japan, and the production technology level of China still has a small difference.
The nickel-chromium-based precision resistance alloy foil is extremely difficult to manufacture due to small thickness and high surface quality requirement. In the actual use process at present, the surface quality of the nickel-chromium-based precision resistance alloy foil with the thickness of 0.01-0.02 mm produced in China is poor, and the comprehensive performance is influenced. Aiming at the situation, a processing method of the nickel-chromium-based precision resistance alloy foil is developed in the application field, the foil with excellent surface quality is produced, and the method has great practical significance.
Disclosure of Invention
The invention aims to provide a preparation method of a nickel-chromium-based precision resistance alloy foil, which solves the problem that the existing processing technology cannot realize the preparation of the nickel-chromium-based precision resistance alloy foil with high surface quality. According to the preparation method of the nickel-chromium-based precision resistance alloy foil, the thickness of the prepared foil is 0.01-0.02 mm.
A preparation method of a nickel-chromium-based precision resistance alloy foil comprises the following specific steps and parameters:
1. heating a nickel-chromium-based precision resistance alloy flat blank with the total content of non-metallic inclusions not more than 0.5 grade, the oxygen content not more than 10ppm and the thickness of 80-100 mm to 1100-1180 ℃, carrying out 7 or 9 passes, and carrying out hot rolling to obtain a strip blank with the thickness of 5.5-6.0 mm;
2. carrying out homogenizing annealing treatment on the strip blank, wherein the heating temperature is 1050-1150 ℃, and the heat preservation is carried out for 1-2 hours;
3. carrying out surface oxidation layer damage treatment on the strip blank obtained in the step 2, and then carrying out rough rolling on a four-roller cold rolling mill, wherein the rolling deformation is 10-15%;
4. cleaning the surface of the belt blank obtained in the step 3, performing coarse grinding by using a grinding wheel, and performing fine grinding by using a thousand-impeller;
5. rolling the thinned strip blank on a four-roller rolling mill for three times to obtain a thick semi-finished product, wherein the rolling thickness is 0.45-0.50 mm, the deformation of the first rolling is 68-70%, the deformation of the second rolling is 48-52%, and the deformation of the third rolling is 36-39%; after each pass of rolling, carrying out intermediate continuous annealing to eliminate work hardening, wherein the annealing temperature is 1080-1150 ℃, and H2A protective atmosphere;
6. cleaning a surface abrasive belt of 0.45-0.50 mm strip subjected to intermediate continuous annealing, wherein the granularity of the abrasive belt is 800-1000 meshes, and then performing decontamination cleaning;
7. rolling the thin semi-finished product of the strip obtained in the step 6 on a 20-roll mill, wherein the rolling frequency is two, the rolling thickness is 0.09-0.10 mm, the deformation of the first rolling is 55-57%, and the deformation of the second rolling is 52-54%; after each pass of rolling, carrying out intermediate continuous annealing to eliminate work hardening, wherein the annealing temperature is 1080-1120 ℃, and H2A protective atmosphere;
8. polishing the surface of the strip of 0.09-0.10 mm after the intermediate continuous annealing, and performing decontamination and cleaning;
9. and finally, performing finish rolling on the strip obtained in the step 8 on a 32-roller mill to obtain a finished foil with the thickness of 0.01-0.02 mm.
The nickel-chromium-based precision resistance alloy in the step 1 is 6J22, 6J23 or 6J24 alloy.
And 5-9, adding a protective film in the strip material coiling process.
And 3, repeatedly performing dislocation leveling on the surface oxide layer by using an S-shaped roller.
After the surface is cleaned in step 4, the surface has no scratch with the depth of more than 0.1 mm.
And 6, cleaning the surface abrasive belt in the step 6 to ensure that the surface roughness is not more than 6.3 microns.
And 8, after the surface is polished, the surface roughness is not more than 1.6 microns.
The invention has the advantages that:
(1) the slab with the total content of non-metallic inclusions not more than 0.5 grade and the oxygen content not more than 10ppm is selected for processing, so that the finished foil can be ensured not to have the pinhole defect caused by the problem of steel quality purity.
(2) The hot-rolled strip billet is repeatedly dislocated and leveled on the S-shaped roller, which is beneficial to damaging the compactness of a surface oxide layer; rough rolling with the deformation amount of 10-15% is carried out on a four-roller cold rolling mill, the structure of an internal oxidation layer is further damaged, and the adhesive force of the oxidation layer is reduced. After the grinding wheel and the millennium are cleaned, the surface oxide layer and the defects are treated more thoroughly.
(3) According to the invention, after the rolling of the thick semi-finished product and the thin semi-finished product, the surface cleaning and the surface polishing are carried out, so that the oxide skin generated in the circulating continuous heat treatment process of the strip can be removed; through decontamination cleaning, residual oxide scale particles on the surface can be removed, and the surface quality is improved.
(4) In the steps 5-9 of the invention, a protective film is added in the strip coiling process to prevent the surfaces from being damaged by mutual friction in the coiling process, thereby reducing external scratches.
(5) The method ensures to obtain the nickel-chromium-based precision resistance alloy foil with excellent surface quality by controlling the flat blank steel purity, surface cleaning and surface polishing for multiple times, strip coiling and adding a protective film and other processes.
Detailed Description
Example 1
A preparation method of a nickel-chromium-based precision resistance alloy foil comprises the following specific steps and parameters:
1. heating a 6J22 alloy flat blank with the total non-metallic inclusion amount of 0.5 grade, the oxygen content of 10ppm and the thickness of 80mm to 1100 ℃, and hot rolling the blank to a strip blank with the thickness of 5.5mm after 7 passes;
2. and carrying out homogenizing annealing treatment on the strip blank, wherein the heating temperature is 1050 ℃, and the heat preservation is carried out for 2 hours.
3. Carrying out surface oxidation layer damage treatment on the strip blank obtained in the step 2, and carrying out rough rolling on a four-roller cold rolling mill, wherein the rolling deformation is 10%;
4. cleaning the surface of the belt blank obtained in the step 3, performing coarse grinding by using a grinding wheel, and performing fine grinding by using a thousand-impeller;
5. and (3) rolling the thinned strip blank on a four-roller rolling mill for a thick semi-finished product for three times, wherein the rolling thickness is 0.45mm, the deformation of the first rolling is 70%, the deformation of the second rolling is 50% and the deformation of the third rolling is 39%. After each pass of rolling, intermediate continuous annealing is carried out to eliminate work hardening, the annealing temperature is 1080 ℃, and H2And (4) protective atmosphere.
6. And (3) cleaning a surface abrasive belt of the 0.45mm strip subjected to intermediate continuous annealing, wherein the granularity of the abrasive belt is 1000 meshes, and then performing decontamination cleaning.
7. And (3) rolling the strip obtained in the step (6) on a 20-roll mill for a thin semi-finished product, wherein the rolling times are two, the rolling thickness is 0.095mm, the deformation of the first rolling is 55%, and the deformation of the second rolling is 52%. After each rolling pass, carrying out intermediate continuous annealing at 1100 ℃ and H to eliminate work hardening2And (4) protective atmosphere.
8. And (3) polishing the surface of the 0.095mm strip subjected to the intermediate continuous annealing, and performing decontamination and cleaning.
9. And finally, finish rolling the strip obtained in the step 8 on a 32-roll mill to obtain a 6J22 alloy finished foil with the thickness of 0.015mm, wherein the surface quality is excellent.
In the present example, in the steps 5 to 9, a protective film was added during the tape winding process.
Example 2
A preparation method of a nickel-chromium-based precision resistance alloy foil comprises the following specific steps and parameters:
1. heating a 6J23 alloy flat blank with the total non-metallic inclusion amount of 0.5 grade, the oxygen content of 8ppm and the thickness of 90mm to 1150 ℃, and hot rolling the blank to a strip blank with the thickness of 5.8mm through 9 passes;
2. and carrying out homogenizing annealing treatment on the strip blank, wherein the heating temperature is 1100 ℃, and the heat preservation is carried out for 2 hours.
3. Carrying out surface oxidation layer damage treatment on the strip blank obtained in the step 2, and carrying out rough rolling on a four-roller cold rolling mill, wherein the rolling deformation is 14%;
4. carrying out surface grinding on the belt blank obtained in the step 3, carrying out coarse grinding by using a grinding wheel, and then carrying out fine grinding by using a thousand-impeller;
5. and (3) rolling the thinned strip blank on a four-roller rolling mill for a thick semi-finished product for three times, wherein the rolling thickness is 0.48mm, the deformation of the first rolling is 68%, the deformation of the second rolling is 52%, and the deformation of the third rolling is 36%. After each rolling pass, carrying out intermediate continuous annealing at 1120 ℃ and H to eliminate work hardening2And (4) protective atmosphere.
6. And (3) carrying out surface abrasive belt grinding on the 0.48mm strip subjected to intermediate continuous annealing, wherein the abrasive belt has the granularity of 800 meshes, and then carrying out decontamination cleaning.
7. And (3) rolling the strip obtained in the step (6) on a 20-roll mill for a thin semi-finished product, wherein the rolling frequency is two, the rolling thickness is 0.09mm, the deformation of the first rolling is 57%, and the deformation of the second rolling is 54%. After each pass of rolling, intermediate continuous annealing is carried out to eliminate work hardening, the annealing temperature is 1080 ℃, and H2And (4) protective atmosphere.
8. And polishing the surface of the 0.09mm strip subjected to intermediate continuous annealing, and performing decontamination and cleaning.
9. And finally, finish rolling the strip obtained in the step 8 on a 32-roller mill to obtain a 6J23 alloy finished foil with the thickness of 0.010mm, wherein the surface quality is excellent.
In the present example, in the steps 5 to 9, a protective film was added during the tape winding process.
Example 3
A preparation method of a nickel-chromium-based precision resistance alloy foil comprises the following specific steps and parameters:
1. heating a 6J24 alloy flat blank with the total non-metallic inclusion amount of 0 grade, the oxygen content of 10ppm and the thickness of 100mm to 1180 ℃, and hot rolling the blank to a strip blank with the thickness of 6.0mm through 9 passes;
2. and (3) carrying out homogenization annealing treatment on the strip blank, wherein the heating temperature is 1150 ℃, and the heat preservation is carried out for 1 hour.
3. Carrying out surface oxidation layer damage treatment on the strip blank obtained in the step 2, and carrying out rough rolling on a four-roller cold rolling mill, wherein the rolling deformation is 15%;
4. carrying out surface grinding on the belt blank obtained in the step 3, carrying out coarse grinding by using a grinding wheel, and then carrying out fine grinding by using a thousand-impeller;
5. and (3) rolling the thinned strip blank on a four-roller rolling mill to obtain a thick semi-finished product, wherein the rolling frequency is three, the rolling thickness is 0.5mm, the deformation of the first rolling is 69%, the deformation of the second rolling is 48%, and the deformation of the third rolling is 38%. After each pass of rolling, intermediate continuous annealing is carried out to eliminate work hardening, the annealing temperature is 1150 ℃, and H2And (4) protective atmosphere.
6. And (3) polishing a 0.50mm strip subjected to intermediate continuous annealing by using a surface abrasive belt, wherein the granularity of the abrasive belt is 800 meshes, and then performing decontamination cleaning.
7. And (3) rolling the strip obtained in the step (6) on a 20-roll rolling mill for a thin semi-finished product, wherein the rolling frequency is two, the rolling thickness is 0.10mm, the deformation of the first rolling is 57%, and the deformation of the second rolling is 53%. After each rolling pass, carrying out intermediate continuous annealing at 1120 ℃ and H to eliminate work hardening2And (4) protective atmosphere.
8. And polishing the surface of the 0.10mm strip subjected to the intermediate continuous annealing, and performing decontamination and cleaning.
9. And finally, finish rolling the strip obtained in the step 8 on a 32-roller mill to obtain a 6J24 alloy finished foil with the thickness of 0.02mm, wherein the surface quality is excellent.
In the present example, in the steps 5 to 9, a protective film was added during the tape winding process.
Claims (7)
1. A preparation method of a nickel-chromium-based precision resistance alloy foil is characterized by comprising the following specific steps and parameters:
1) heating a nickel-chromium-based precision resistance alloy flat blank with the total content of non-metallic inclusions not more than 0.5 grade, the oxygen content not more than 10ppm and the thickness of 80-100 mm to 1100-1180 ℃, carrying out 7 or 9 passes, and carrying out hot rolling to obtain a strip blank with the thickness of 5.5-6.0 mm;
2) carrying out homogenizing annealing treatment on the strip blank, wherein the heating temperature is 1050-1150 ℃, and the heat preservation is carried out for 1-2 hours;
3) carrying out surface oxidation layer damage treatment on the strip blank obtained in the step 2), and then carrying out rough rolling on a four-roller cold rolling mill, wherein the rolling deformation is 10-15%;
4) cleaning the surface of the belt blank obtained in the step 3), performing coarse grinding by using a grinding wheel, and performing fine grinding by using a thousand-impeller;
5) rolling the thinned strip blank on a four-roller rolling mill for three times to obtain a thick semi-finished product, wherein the rolling thickness is 0.45-0.50 mm, the deformation of the first rolling is 68-70%, the deformation of the second rolling is 48-52%, and the deformation of the third rolling is 36-39%; after each pass of rolling, carrying out intermediate continuous annealing to eliminate work hardening, wherein the annealing temperature is 1080-1150 ℃, and H2A protective atmosphere;
6) cleaning a surface abrasive belt of 0.45-0.50 mm strip subjected to intermediate continuous annealing, wherein the granularity of the abrasive belt is 800-1000 meshes, and then performing decontamination cleaning;
7) rolling the thin semi-finished product of the strip obtained in the step 6) on a 20-roll mill for two times, wherein the rolling thickness is 0.09-0.10 mm, the deformation of the first rolling is 55-57%, and the deformation of the second rolling is 52-54%; after each pass of rolling, carrying out intermediate continuous annealing to eliminate work hardening, wherein the annealing temperature is 1080-1120 ℃, and H2A protective atmosphere;
8) polishing the surface of the strip of 0.09-0.10 mm after the intermediate continuous annealing, and performing decontamination and cleaning;
9) and finally, performing finish rolling on the strip obtained in the step 8) on a 32-roller mill to obtain a finished foil with the thickness of 0.01-0.02 mm.
2. The method of claim 1, wherein the nichrome-based precision resistance alloy in step 1) is 6J22, 6J23, or 6J24 alloy.
3. The method according to claim 1, wherein in steps 5) -9), a protective film is added during the coiling of the strip.
4. The method as claimed in claim 1, wherein the surface oxidation layer destruction treatment in step 3) is repeated dislocation leveling with S-shaped rollers.
5. The method of claim 1, wherein the surface is free of scratches having a depth of greater than 0.1 mm after the surface is cleaned in step 4).
6. A method according to claim 1, characterized in that the surface roughness after the surface belt cleaning in step 6) is not more than 6.3 μm.
7. The method of claim 1, wherein after the surface polishing in step 8), the surface has a roughness of no greater than 1.6 microns.
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| CN111826572A (en) * | 2019-04-20 | 2020-10-27 | 丹阳市金星镍材有限公司 | Nickel-chromium-based precision resistance alloy for instruments and preparation method thereof |
| CN111809127B (en) * | 2020-07-17 | 2021-11-30 | 河南明晟新材料科技有限公司 | Preparation method of aluminum alloy foil for aluminum diaphragm of loudspeaker |
| CN112813369B (en) * | 2020-12-31 | 2022-04-12 | 北京钢研高纳科技股份有限公司 | High-strength high-elasticity high-plasticity nickel-based high-temperature alloy strip and preparation process thereof |
| CN113182353B (en) * | 2021-03-12 | 2022-09-20 | 北京北冶功能材料有限公司 | Preparation method of nickel-based high-temperature alloy cold-rolled foil for aircraft engine |
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