CN112620347A - Processing technology of high-shaping brass strip for producing H90 bullet cartridge case - Google Patents
Processing technology of high-shaping brass strip for producing H90 bullet cartridge case Download PDFInfo
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- CN112620347A CN112620347A CN202011466019.7A CN202011466019A CN112620347A CN 112620347 A CN112620347 A CN 112620347A CN 202011466019 A CN202011466019 A CN 202011466019A CN 112620347 A CN112620347 A CN 112620347A
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- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 59
- 239000010951 brass Substances 0.000 title claims abstract description 59
- 238000007493 shaping process Methods 0.000 title claims abstract description 37
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 65
- 238000004140 cleaning Methods 0.000 claims abstract description 30
- 239000003973 paint Substances 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 79
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 47
- 229910052802 copper Inorganic materials 0.000 claims description 47
- 239000010949 copper Substances 0.000 claims description 47
- 238000000137 annealing Methods 0.000 claims description 44
- 238000003801 milling Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000010008 shearing Methods 0.000 claims description 17
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 238000005098 hot rolling Methods 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 238000005554 pickling Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000004381 surface treatment Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/222—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 plates, strips, bands or sheets of indefinite length in a rolling-drawing process; in a multi-pass mill
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
Abstract
The invention discloses a processing technology of a high-shaping brass band for producing H90 bullet shells, which comprises the following steps: A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning. According to the invention, the raw material is cleaned of impurities, and the surface of the high-shaping brass band is coated with the anticorrosive paint, so that the advantages of cleaning and removing impurities from the surface of the raw material and coating the anticorrosive paint on the surface of the high-shaping brass band for long-term storage are achieved, the surface of the raw material can be effectively cleaned and removed of impurities, the subsequent processing quality of the high-shaping brass band is improved, and meanwhile, before the high-shaping brass band is stored for a long time, the anticorrosive paint can be coated on the surface of the high-shaping brass band, so that the production cost of a factory is reduced.
Description
Technical Field
The invention relates to the technical field of brass band processing, in particular to a processing technology of a high-shaping brass band for producing H90 bullet shells.
Background
Brass has very good plasticity (the best brass) and higher strength, good machinability, easy welding, and is very stable to general corrosion but easy to generate corrosion cracking, and brass strip is an alloy of copper and zinc and is famous for yellow color.
When the H90 bullet cartridge case is produced, a high-shaping brass band needs to be processed firstly, and the existing high-shaping brass band processing technology has the following defects: the existing high-shaping brass band processing technology is easy to adsorb impurities on the surface of a raw material during material selection, so that the processing quality of the high-shaping brass band is reduced, and meanwhile, the surface of the high-shaping brass band is easy to corrode when the high-shaping brass band is stored for a long time, so that the high-shaping brass band is corroded and damaged, and the production cost of a factory is increased.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a processing technology of a high-shaping brass band for producing H90 bullet cartridge cases, which has the advantages of cleaning the surface of a raw material to remove impurities and coating the surface of the high-shaping brass band with an anticorrosive paint to facilitate long-term storage, and solves the problems that the impurity is easily adsorbed on the surface of the raw material during material selection, the processing quality of the high-shaping brass band is reduced, and meanwhile, the surface of the high-shaping brass band is easily corroded to cause corrosion damage of the high-shaping brass band during long-term storage in the existing processing technology of the high-shaping brass band.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Preferably, in the step C hot rolling and surface milling, the specification of the roller is phi 550 × 700 mm, the rolling thickness is sequentially 180-148-120-90-65-45-30-22-18-16 mm, the tolerance is-0.4 to 0.1 mm, the single-side milling thickness is 0.4 mm to 0.6 mm, and the surface milling thickness is 14.8 + -0.2 mm.
Preferably, in the rough rolling and the primary annealing in the step D, the rough rolling thickness is 14.8-9.7-6.7-4.7-3.4-2.5 mm in sequence, the tolerance is +/-0.1 mm, the annealing temperature is 500-550 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 4-5 hours, and the tapping temperature is 70-80 ℃.
Preferably, in the rolling and the secondary annealing in the step E, the specification of the roller is phi 550x550 mm, the thickness is 2.5-1.4-0.9-0.68 mm in sequence, the tolerance is +/-0.01 mm, the annealing temperature is 450-500 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 3-4 hours, and the tapping temperature is 70-80 ℃.
Preferably, in the step F finish rolling, the roller specification is phi 150X 550, the thickness is 0.68-0.35-0.28 mm in sequence, and the tolerance is +/-0.005 mm.
(III) advantageous effects
Compared with the prior art, the invention provides a processing technology of a high-shaping brass band for producing H90 bullet shells, which has the following beneficial effects:
according to the invention, the raw material is cleaned of impurities, and the surface of the high-shaping brass band is coated with the anticorrosive paint, so that the advantages of cleaning and removing impurities from the surface of the raw material and coating the anticorrosive paint on the surface of the high-shaping brass band for long-term storage are achieved, the surface of the raw material can be effectively cleaned and removed of impurities, the subsequent processing quality of the high-shaping brass band is improved, and meanwhile, before the high-shaping brass band is stored for a long time, the anticorrosive paint can be coated on the surface of the high-shaping brass band, so that the problem of corrosion damage on the surface of the high-shaping brass band is avoided, and the production cost of a factory is.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
All the components of the present invention are standard components commonly used or known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.
A processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: detect the shearing copper strips, qualified back packing warehouse entry, can accomplish the production preparation of brass band, rinse the impurity through the setting to the raw materials, to high moulding brass band surface coating anticorrosive paint simultaneously, thereby reached and got rid of impurity and the advantage of being convenient for deposit for a long time to high moulding brass band surface coating anticorrosive paint to raw materials surface cleaning, can effectually rinse the raw materials surface and get rid of impurity, the quality of follow-up high moulding brass band processing has been improved, high moulding brass band is before depositing for a long time simultaneously, can be to the surface coating anticorrosive paint of high moulding brass band, the problem of corrosion damage appears in high moulding brass band surface has been avoided, the manufacturing cost of mill has been reduced.
The first embodiment is as follows:
a processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Example two:
in the first embodiment, the following steps are added:
in the step C, the specification of the roller is phi 550 multiplied by 700 mm, the rolling thickness is sequentially 180 plus 148 plus 120-90-65-45-30-22-18-16 mm, the tolerance is-0.4 to 0.1 mm, the single-side milling thickness is 0.4 mm to 0.6 mm, and the milling thickness is 14.8 +/-0.2 mm.
A processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Example three:
in the second embodiment, the following steps are added:
in the rough rolling and the primary annealing in the step D, the rough rolling thickness is 14.8-9.7-6.7-4.7-3.4-2.5 mm in sequence, the tolerance is +/-0.1 mm, the annealing temperature is 500-550 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 4-5 hours, and the tapping temperature is 70-80 ℃.
A processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Example four:
in the third embodiment, the following steps are added:
in the rolling and secondary annealing in the step E, the specification of the roller is phi 550x550 mm, the thickness is 2.5-1.4-0.9-0.68 mm in sequence, the tolerance is +/-0.01 mm, the annealing temperature is 450-500 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 3-4 hours, and the tapping temperature is 70-80 ℃.
A processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Example five:
in the fourth example, the following steps were added:
in the step F finish rolling, the specification of the roller is phi 150 multiplied by 550, the thickness is 0.68 to 0.35 to 0.28 mm in sequence, and the tolerance is +/-0.005 mm.
A processing technology of a high-shaping brass band for producing H90 bullet shells comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A processing technology of a high-shaping brass band for producing H90 bullet shells is characterized in that: the processing technology comprises the following steps:
A. raw material proportioning, cleaning and drying: selecting raw materials of all components according to mass percentage, mixing and batching to obtain mixed raw materials, then spraying water to clean the mixed raw materials to remove impurities on the surface, and drying the surface of the mixed raw materials after cleaning;
B. casting: putting the mixed raw materials into a heating furnace, heating to a molten state, and pouring into a billet;
C. hot rolling and face milling: preheating the billet to 300-450 ℃, putting the billet into a rolling mill for primary rolling to obtain a hot rolled plate, and milling the surface of the hot rolled plate to obtain a milled surface plate;
D. rough rolling and primary annealing: repeatedly rolling the milled plate to obtain a rough rolled plate, and annealing the rough rolled plate for the first time to obtain a primary annealed plate;
E. intermediate rolling and secondary annealing: carrying out medium rolling treatment on the primary annealed plate to obtain a medium rolled plate, and carrying out secondary annealing on the medium rolled plate by using a bell jar furnace to obtain a secondary annealed plate;
F. finish rolling: performing finish rolling on the secondary annealed plate to obtain a finish-rolled plate;
G. surface treatment and shearing: pickling the finish-rolled plate, removing an oxide film, cleaning to obtain a treated plate, shearing two sides of the plate, and removing burrs and flashes to obtain a sheared copper strip;
H. coating an anticorrosive paint on the surface: the obtained copper strip is sprayed with the special anticorrosive paint, so that the copper strip can be stored for a long time when being stored at a later stage, and the copper strip is prevented from being corroded and damaged;
I. and (3) inspecting and packaging: and detecting the sheared copper strip, packaging and warehousing after the sheared copper strip is qualified, and finishing the production and preparation of the brass strip.
2. The process of claim 1 for the production of highly shaped brass ribbon for use in the production of H90 bullet cases, wherein: in the step C, the specification of the roller is phi 550 multiplied by 700 mm, the rolling thickness is sequentially 180 plus 148 plus 120-90-65-45-30-22-18-16 mm, the tolerance is-0.4 to 0.1 mm, the single-side milling thickness is 0.4 mm to 0.6 mm, and the milling surface thickness is 14.8 +/-0.2 mm.
3. The process of claim 1 for the production of highly shaped brass ribbon for use in the production of H90 bullet cases, wherein: in the rough rolling and the primary annealing in the step D, the rough rolling thickness is 14.8-9.7-6.7-4.7-3.4-2.5 mm in sequence, the tolerance is +/-0.1 mm, the annealing temperature is 500-550 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 4-5 hours, and the tapping temperature is 70-80 ℃.
4. The process of claim 1 for the production of highly shaped brass ribbon for use in the production of H90 bullet cases, wherein: in the rolling and the secondary annealing in the step E, the specification of the roller is phi 550x550 mm, the thickness is 2.5-1.4-0.9-0.68 mm in sequence, the tolerance is +/-0.01 mm, the annealing temperature is 450-500 ℃, the heating rate is 150-170 ℃ per hour, the heat preservation time is 3-4 hours, and the tapping temperature is 70-80 ℃.
5. The process of claim 1 for the production of highly shaped brass ribbon for use in the production of H90 bullet cases, wherein: and in the step F finish rolling, the specification of the roller is phi 150 multiplied by 550, the thickness is 0.68-0.35-0.28 mm in sequence, and the tolerance is +/-0.005 mm.
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