CN110551932A - 304 thin strip stainless steel battery heating piece and preparation method thereof - Google Patents
304 thin strip stainless steel battery heating piece and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- 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
- C23G1/08—Iron or steel
- C23G1/085—Iron or steel solutions containing HNO3
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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
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
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Abstract
The invention discloses a 304 thin stainless steel battery heating piece, which comprises the following components in percentage by weight: c0.060-0.120; mn 0.650-1.600; s0.035-0.065; p is 0.003 to 0.004; si 0.200-0.500; cr 20.000-22.000; ni 23.000-25.000; mo 0.100-0.300; nb 0.350-0.450; cu 2.500-2.850; si 0.100-0.200; 1.500-3.500 of Al; the balance of Fe and inevitable impurities; according to the invention, through the improvement of the formula and the process, the Al element is added, so that a compact and continuous oxide film is formed on the surface of the heating sheet at a high temperature, oxygen is prevented from invading into the heating sheet, and the high-temperature oxidation resistance of the heating sheet is obviously improved.
Description
Technical Field
The invention relates to the technical field of stainless steel bands, in particular to a 304 thin-strip stainless steel battery heating piece and a preparation method thereof.
background
The stainless steel cold-rolled steel strip is formed by further cold rolling by taking the hot-rolled stainless steel strip as a blank, has higher dimensional precision, low surface roughness, good surface quality, smoothness and higher strength compared with a hot-rolled strip, can replace a thicker hot-rolled strip for the same purpose, saves the consumption of steel products, and has great economic significance. The method is suitable for industries such as electric appliances, stainless steel kitchen utensils, hardware products, floor springs, sanitary ware, chemical engineering, petroleum, pipe making, cable wrapping, medical treatment, bending and flanging, and building decoration manufactured by mechanical equipment. The hard state is suitable for the industry fields of stainless steel, such as electronic products, electric appliances, computers, high-tech product parts, adjusting gaskets, hardware stamping part spring pieces and the like.
In the battery industry, an automobile battery heating plate is a sheet-shaped electric heating element which can generate heat, is supported and protected by a stainless steel belt, and can be made into various sheet-shaped heating devices such as a plate shape, a sheet shape, a cylindrical shape, a conical shape, a cylindrical shape, a circular ring shape and the like. The normal surface load is 2.5-3W, and the temperature can be resisted by 500 ℃. The automobile battery heating plate is placed with an electric heating element, and the gap part is tightly filled with crystallized magnesia powder with good heat resistance, heat conductivity and insulativity, and then the automobile battery heating plate is formed by other processes. It has the advantages of simple structure, high mechanical strength, high thermal efficiency, reliability, simple installation, long service life, etc.
However, the automotive battery heating sheet is oxidized when used under a high temperature state for a long time, and the strength and tensile strength thereof are deteriorated over time, and thus the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a 304 thin strip stainless steel battery heating plate with high temperature oxidation resistance, which is aimed at solving the problems of the prior art.
the technical scheme of the invention is as follows:
a304 thin stainless steel battery heating piece comprises the following components in percentage by weight: c0.060-0.120; mn 0.650-1.600; s0.035-0.065; p is 0.003 to 0.004; si 0.200-0.500; cr 20.000-22.000; ni23.000-25.000; mo 0.100-0.300; nb 0.350-0.450; cu 2.500-2.850; si 0.100-0.200; al1.500-3.500; the balance being Fe and unavoidable impurities.
In a further technical scheme, the 304 thin stainless steel battery heating plate comprises the following components in percentage by weight: c0.060; mn 0.800; s0.045; p is 0.003; si 0.200; cr 22.000; ni 25.000; mo 0.200; nb0.450; cu 2.75; si 00.200; 1.500-3.500 of Al; the balance being Fe and unavoidable impurities.
Another object of the present invention is to provide a method for manufacturing a 304 thin strip stainless steel battery heating plate, wherein the method comprises:
1) Pouring 304 stainless steel and the metal solution of S, P, Si, Mo and Al in percentage by weight into a vacuum induction furnace for refining, casting the metal solution into steel ingots, and preparing the steel ingots into thin strip blanks by continuous casting or strip casting;
2) Heating the thin strip blank to the temperature of 1100-1280 ℃, rolling the thin strip blank into a platy blank with the thickness of 60mm, and then rolling the platy blank into a banded blank with the thickness of 1.5 mm;
3) Putting the strip-shaped blank into a continuous annealing furnace, introducing inert protective gas into the annealing furnace, and carrying out annealing treatment at the temperature of 580-620 ℃;
4) Introducing the annealed strip-shaped blank into an acid solution tank for acid washing treatment;
5) Rolling the pickled strip-shaped blank into a non-steel thin strip with the thickness of 1mm by using a cold rolling mill at the speed of 20-50 min/m;
6) And cutting the stainless steel thin strip into battery heating pieces with preset sizes.
In a further technical scheme, the cold rolling process in the step 5) adopts a four-roller machine for rolling, the reduction rate of each pass is not more than 20%, and the total reduction rate of each rolling pass is not more than 80%.
In a further technical scheme, after the step 1), the thin strip blank is subjected to solution quenching treatment, wherein the solution quenching temperature is 1260 ℃, and the heat preservation time is 2 hours.
In a further technical scheme, after the step 5), the surface of the stainless steel thin strip is polished step by metallographic abrasive paper.
In a further technical scheme, hydrochloric acid or nitric acid is selected in the pickling tank in the step 4) for pickling treatment.
has the advantages that: according to the invention, through the improvement of the formula and the process, the Al element is added, so that a compact and continuous oxide film is formed on the surface of the heating sheet at a high temperature, oxygen is prevented from invading into the heating sheet, and the high-temperature oxidation resistance of the heating sheet is obviously improved.
Detailed Description
The invention provides a 304 thin strip stainless steel battery heating piece and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A304 thin stainless steel battery heating piece comprises the following components in percentage by weight: c0.060-0.120; mn 0.650-1.600; s0.035-0.065; p is 0.003 to 0.004; si 0.200-0.500; cr 20.000-22.000; ni23.000-25.000; mo 0.100-0.300; nb 0.350-0.450; cu 2.500-2.850; si 0.100-0.200; al1.500-3.500; the balance being Fe and unavoidable impurities.
Example 1
The 304 thin stainless steel battery heating piece comprises the following components in percentage by weight: c0.060; mn 0.800; s0.045; p is 0.003; si 0.200; cr 22.000; ni 25.000; mo 0.200; nb 0.450; cu 2.75; si 00.200; al1.500; the balance being Fe and unavoidable impurities.
Pouring 304 stainless steel and the metal solution of S, P, Si, Mo and Al in percentage by weight into a vacuum induction furnace for refining, casting the metal solution into steel ingots, and preparing the steel ingots into thin strip blanks through continuous casting or strip casting.
heating the thin strip blank to 1100 ℃, and then carrying out solution quenching treatment, wherein the solution quenching temperature is 1260 ℃, and the heat preservation time is 2 hours; rolling the thin strip blank into a platy blank with the thickness of 60mm, and then rolling the platy blank into a strip-shaped blank with the thickness of 1.5 mm; putting the strip-shaped blank into a continuous annealing furnace, introducing inert protective gas into the annealing furnace, and carrying out annealing treatment at the temperature of 580-620 ℃; and introducing the annealed strip-shaped blank into an acid liquid tank containing hydrochloric acid or nitric acid for acid washing treatment.
After acid pickling, rolling the acid-pickled strip-shaped blank into a non-steel thin strip with the thickness of 1mm by adopting a four-roller machine at the speed of 30 min/m, wherein the compression rate of each pass is not more than 20 percent, and the total compression rate of each rolling pass is not more than 80 percent; polishing the surface of the stainless steel thin strip step by step through metallographic abrasive paper; and cutting the polished stainless steel thin belt into battery heating pieces with preset sizes.
Example 2
The 304 thin stainless steel battery heating piece comprises the following components in percentage by weight: c0.060; mn 0.800; s0.045; p is 0.003; si 0.200; cr 22.000; ni 25.000; mo 0.200; nb 0.450; cu 2.75; si 00.200; al2.500; the balance being Fe and unavoidable impurities.
Pouring 304 stainless steel and the metal solution of S, P, Si, Mo and Al in percentage by weight into a vacuum induction furnace for refining, casting the metal solution into steel ingots, and preparing the steel ingots into thin strip blanks through continuous casting or strip casting.
heating the thin strip blank to 1100 ℃, and then carrying out solution quenching treatment, wherein the solution quenching temperature is 1260 ℃, and the heat preservation time is 2 hours; rolling the thin strip blank into a platy blank with the thickness of 60mm, and then rolling the platy blank into a strip-shaped blank with the thickness of 1.5 mm; putting the strip-shaped blank into a continuous annealing furnace, introducing inert protective gas into the annealing furnace, and carrying out annealing treatment at the temperature of 580-620 ℃; and introducing the annealed strip-shaped blank into an acid liquid tank containing hydrochloric acid or nitric acid for acid washing treatment.
after acid pickling, rolling the acid-pickled strip-shaped blank into a non-steel thin strip with the thickness of 1mm by adopting a four-roller machine at the speed of 30 min/m, wherein the compression rate of each pass is not more than 20 percent, and the total compression rate of each rolling pass is not more than 80 percent; polishing the surface of the stainless steel thin strip step by step through metallographic abrasive paper; and cutting the polished stainless steel thin belt into battery heating pieces with preset sizes.
Example 3
The 304 thin stainless steel battery heating piece comprises the following components in percentage by weight: c0.060; mn 0.800; s0.045; p is 0.003; si 0.200; cr 22.000; ni 25.000; mo 0.200; nb 0.450; cu 2.75; si 00.200; al3.500; the balance being Fe and unavoidable impurities.
Pouring 304 stainless steel and the metal solution of S, P, Si, Mo and Al in percentage by weight into a vacuum induction furnace for refining, casting the metal solution into steel ingots, and preparing the steel ingots into thin strip blanks through continuous casting or strip casting.
Heating the thin strip blank to 1100 ℃, and then carrying out solution quenching treatment, wherein the solution quenching temperature is 1260 ℃, and the heat preservation time is 2 hours; rolling the thin strip blank into a platy blank with the thickness of 60mm, and then rolling the platy blank into a strip-shaped blank with the thickness of 1.5 mm; putting the strip-shaped blank into a continuous annealing furnace, introducing inert protective gas into the annealing furnace, and carrying out annealing treatment at the temperature of 580-620 ℃; and introducing the annealed strip-shaped blank into an acid liquid tank containing hydrochloric acid or nitric acid for acid washing treatment.
after acid pickling, rolling the acid-pickled strip-shaped blank into a non-steel thin strip with the thickness of 1mm by adopting a four-roller machine at the speed of 30 min/m, wherein the compression rate of each pass is not more than 20 percent, and the total compression rate of each rolling pass is not more than 80 percent; polishing the surface of the stainless steel thin strip step by step through metallographic abrasive paper; and cutting the polished stainless steel thin belt into battery heating pieces with preset sizes.
The ordinary battery heating plate and the 304 thin strip stainless steel battery heating plate prepared in the above example 3 were subjected to high temperature oxidation resistance test according to the GBT13303 standard, with the oxidation atmosphere being air, the oxidation temperatures being 500, 600 and 700 ℃, and the oxidation times being 24, 48, 72, 96 and 120 hours.
The following conclusions were drawn after the test: after 24 hours, the surface of the common battery heating plate begins to have obvious oxidation traces, after 48 hours, the surface becomes brittle, after the common battery heating plate is cut, the cross section of the cut can be observed to have the internal obvious oxidation traces, and the high-temperature oxidation resistance is poor.
In 3 examples prepared by the scheme, the high-temperature oxidation resistant effect of example 1 is the worst in 3 examples, although an Al oxide film is generated on the surface, the oxide film is discontinuous and relatively thin, no obvious oxidation can be observed in the cross section of the notch within 120h under the condition of 500 ℃, when the temperature is raised to 600 ℃ or 700 ℃, discontinuous surfaces are formed on part of the positions to form MnCr2O4 or Cr2O3, the compactness is not strong, oxygen can still enter the heating sheet, and an oxidation trace is generated in the heating sheet after 72h, but is not obvious.
In the embodiment 2 and the embodiment 3, no oxidation can be observed in the cross section of the notch within 120h under the condition of 500 ℃, the high-temperature oxidation resistant effect at 600 ℃ and 700 ℃ is better, no obvious oxidation trace exists in the inside, and because a layer of continuous and compact Al 2 O 3 is generated on the surface of the notch under the high-temperature state, and oxide particles are uniform and fine, oxygen cannot enter the inside of the heating sheet, the continuous oxidation is prevented, and the high-temperature oxidation resistance of the heating sheet is obviously improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (7)
1. A304 thin stainless steel battery heating piece is characterized by comprising the following components in percentage by weight: c0.060-0.120; mn 0.650-1.600; s0.035-0.065; p is 0.003 to 0.004; si 0.200-0.500; cr 20.000-22.000; ni 23.000-25.000; mo 0.100-0.300; nb 0.350-0.450; cu 2.500-2.850; si0.100-0.200; 1.500-3.500 of Al; the balance being Fe and unavoidable impurities.
2. The 304 stainless steel battery heater chip of claim 1, comprising in weight percent: c0.060; mn 0.800; s0.045; p is 0.003; si 0.200; cr 22.000; ni 25.000; mo 0.200; nb0.450; cu 2.75; si 00.200; 1.500-3.500 of Al; the balance being Fe and unavoidable impurities.
3. A method of manufacturing a 304 ribbon stainless steel battery heater chip as claimed in any one of claims 1 or 2, wherein: the method comprises the following steps:
1) Pouring 304 stainless steel and the metal solution of S, P, Si, Mo and Al in percentage by weight into a vacuum induction furnace for refining, casting the metal solution into steel ingots, and preparing the steel ingots into thin strip blanks by continuous casting or strip casting;
2) Heating the thin strip blank to the temperature of 1100-1280 ℃, rolling the thin strip blank into a platy blank with the thickness of 60mm, and then rolling the platy blank into a banded blank with the thickness of 1.5 mm;
3) Putting the strip-shaped blank into a continuous annealing furnace, introducing inert protective gas into the annealing furnace, and carrying out annealing treatment at the temperature of 580-620 ℃;
4) Introducing the annealed strip-shaped blank into an acid solution tank for acid washing treatment;
5) Rolling the pickled strip-shaped blank into a non-steel thin strip with the thickness of 1mm by using a cold rolling mill at the speed of 20-50 min/m;
6) And cutting the stainless steel thin strip into battery heating pieces with preset sizes.
4. the method for manufacturing a 304 thin strip stainless steel battery heating plate according to claim 3, wherein: the cold rolling process in the step 5) adopts a four-roller machine for rolling, the compression ratio of each pass is not more than 20%, and the total compression ratio of each rolling pass is not more than 80%.
5. the method of manufacturing a 304 thin strip stainless steel battery heater chip according to claim 3, wherein: after the step 1), the thin strip blank is subjected to solution quenching treatment, wherein the solution quenching temperature is 1260 ℃, and the heat preservation time is 2 hours.
6. The method of manufacturing a 304 thin strip stainless steel battery heater chip according to claim 3, wherein: and 5) after the step 5), gradually polishing the surface of the stainless steel thin strip by using metallographic abrasive paper.
7. The method of manufacturing a 304 thin strip stainless steel battery heater chip according to claim 3, wherein: and 4) selecting hydrochloric acid or nitric acid in the pickling tank for pickling treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910898159.2A CN110551932A (en) | 2019-09-23 | 2019-09-23 | 304 thin strip stainless steel battery heating piece and preparation method thereof |
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| CN201910898159.2A CN110551932A (en) | 2019-09-23 | 2019-09-23 | 304 thin strip stainless steel battery heating piece and preparation method thereof |
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