CN110846595A - Stainless steel strip, method and apparatus for manufacturing the same, and method of forming microtube - Google Patents
Stainless steel strip, method and apparatus for manufacturing the same, and method of forming microtube Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/005—Manufacture of stainless steel
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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
- 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
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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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—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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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—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
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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Abstract
The invention provides a stainless steel strip, which is added with the following alloy elements: cr, Si, Mo, Ni, Mn, N, Ti. The invention also provides a manufacturing method of the stainless steel band. The invention also provides a method for forming the microtube of the stainless steel band. The invention also provides equipment for manufacturing the stainless steel band. The invention has the beneficial effects that: the ultrathin corrosion-resistant high-temperature-resistant stainless steel band can be obtained, and the manufacturing requirements of the communication optical fiber protection tube can be better met.
Description
Technical Field
The invention relates to optical fiber communication, in particular to a stainless steel belt, a manufacturing method and manufacturing equipment thereof, and a micro-pipe forming method.
Background
The stainless steel strip has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile resistance and water resistance, can be freely bent to various angles and curvature radiuses, and has the same flexibility and durability in all directions. The method can be used for producing a protective tube suitable for the communication optical fiber, and can greatly improve the viability of the communication optical cable under severe environmental conditions of ultralow temperature, ultrahigh temperature, high pressure, high humidity, rat damage, ant damage and the like.
The manufacturing requirement of the communication optical fiber protection tube is mainly that the communication optical fiber protection tube is ultrathin, corrosion-resistant and high-temperature-resistant, so how to further improve the corrosion-resistant and high-temperature-resistant performance of the stainless steel band and reduce the thickness of the stainless steel band is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a stainless steel band, a manufacturing method and manufacturing equipment thereof, and a micro-tube forming method.
The invention provides a stainless steel strip, which is added with the following alloy elements: cr, Si, Mo, Ni, Mn, N, Ti.
(ii) a N: 0.1 to 0.16; less than or equal to 0.030; s: less than or equal to 0.030; p: less than or equal to 0.035 wt%, and the balance Fe; and sending the stainless steel water to an LF furnace for refining, sending the stainless steel water to a continuous casting machine set to form a square blank, and carrying out hot rolling on the square blank formed by continuous casting to obtain the hot-rolled black skin roll. the invention also provides a method for manufacturing stainless steel belt, which comprises the steps of adding high carbon ferrochrome into Ni-containing pig iron as a base material, smelting stainless steel mother liquor, smelting the stainless steel mother liquor through a GOR converter, adding Mn alloy, Mo alloy and Ti alloy for alloying, and obtaining alloyed molten steel; the alloyed molten steel is subjected to three-step method smelting of stainless steel through converter decarburization, AOD furnace preliminary decarburization and VOD furnace vacuum refining decarburization to obtain a stainless steel with the chemical components of Cr: 16.00 to 18.00; si: less than or equal to 0.50; mo: less than or equal to 3; ni: 10.00-12.00; mn: less than or equal to 2.00; ti: 5 to 0.80 percent of C
As a further improvement of the invention, high-carbon ferrochrome is added into Ni-containing pig iron serving as a base material according to 160-200 Kg per ton of steel, stainless steel mother liquor is smelted in an electric arc furnace, and the tapping temperature is controlled to 1600 DEG0(ii) a N: 0.1 to 0.16; less than or equal to 0.030; s: less than or equal to 0.030; p: less than or equal to 0.035 wt%, and the balance Fe; and the stainless steel water is sent to an LF furnace for refining for 45-90min and then sent to a continuous casting machine set to form a square billet, in order to ensure the purity of the steel water, the liquid level of a continuous casting tundish is kept at 900-1000mm, and the phenomenon of secondary pollution of the steel water such as slag entrapment and the like is avoided in the continuous casting process, and the continuously cast square billet is hot rolled to obtain a hot-rolled black coil. C, smelting by a GOR converter, adding 2-3 Kg/t of Mn alloy, 3-4 Kg/t of Mo alloy and 0.8-1 Kg/t of Ti alloy for alloying to obtain alloyed molten steel, and smelting stainless steel by the alloyed molten steel through a three-step method of converter decarburization, AOD furnace preliminary decarburization and VOD furnace vacuum refining decarburization to obtain the alloy containing Cr: 16.00 to 18.00; si: less than or equal to 0.50; mo: less than or equal to 3; ni: 10.00-12.00; mn: less than or equal to 2.00; ti: 5 to 0.80 percent of C
As a further improvement of the invention, the hot-rolled black coil is annealed and pickled, and then is rolled by a continuous rolling technology of a rolling mill for multiple times to produce the stainless steel coil.
As a further improvement of the invention, the heating temperature of hot rolling is 1160-12900C, a crimping temperature of 700-800 DEG C0C, solid solution temperature of 1010-11200C。
As a further improvement of the invention, the precisely rolled stainless steel coil is subjected to surface rolling oil treatment by a degreasing unit, then is subjected to bright annealing to obtain a precisely alloyed stainless steel band, then is subjected to softening treatment and hardening leveling by a stretching and straightening unit, and finally is subjected to longitudinal cutting and slitting by a longitudinal cutting unit to obtain the stainless steel band.
The invention also provides a method for forming the microtube of the stainless steel band, which conveys the stainless steel band to a cleaning device through a conveying device to complete cleaning, and ensures that the conveying process and the forming process are not rubbed by foreign mattersThe stainless steel band is cut into steel bands with set width by a transmission device, and finally, the stainless steel bands are gradually formed by a plurality of micro-tube forming dies with gradually changed sizes by a gradual forming device to form micro tubes, the micro tubes which are gradually formed are transmitted to a cleaning device by the transmission device to be cleaned before welding, so that the welding surface is ensured to be clean, a welding seam is prevented from being formed by foreign matters on the welding surface, the micro tubes are subjected to laser butt welding in a thermal conduction welding mode by a precisely controlled laser welding machine, the welding seam eddy current inspection technology is carried out after welding, and the welding power density is required to be 10 during laser welding5W/cm2The welding speed needs to be controlled at 2m/min, the defocusing amount adopts positive defocusing 1mm, and the pulse width is 2.0 ms.
The invention also provides manufacturing equipment of the stainless steel strip, which comprises an electric arc furnace, an AOD furnace, a VOD furnace and a continuous casting machine, wherein a discharge hole of the electric arc furnace is butted with a feed inlet of the AOD furnace, a discharge hole of the AOD furnace is butted with a feed inlet of the VOD furnace, and a discharge hole of the VOD furnace is butted with a feed inlet of the continuous casting machine.
As a further improvement of the invention, a GOR converter is connected between the electric arc furnace and the AOD furnace, and an LF furnace is connected between the VOD furnace and the continuous casting machine.
As a further improvement of the invention, a discharge port of the continuous casting machine is connected with a rolling mill, a discharge port of the rolling mill is connected with a degreasing unit, a discharge port of the degreasing unit is connected with a bright annealing unit, a discharge port of the bright annealing unit is connected with a stretching and straightening unit, and a discharge port of the stretching and straightening unit is connected with a longitudinal cutting unit.
The invention has the beneficial effects that: by adopting the scheme, the ultrathin corrosion-resistant high-temperature-resistant stainless steel band can be obtained, and the manufacturing requirement of the communication optical fiber protection tube can be better met.
Drawings
FIG. 1 is a schematic view of an apparatus for manufacturing a stainless steel strip according to the present invention.
FIG. 2 is a schematic view showing the progressive forming of a microtube by the method for forming a microtube of a stainless steel strip according to the present invention.
FIG. 3 is a schematic view of laser seamless welding in a method for forming a stainless steel strip into a microtube according to the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
A stainless steel band is a special alloy stainless steel band which has good corrosion resistance, high temperature resistance, forming performance and welding performance, and has the thickness of 3mm, the width of 0.15mm and the thickness of 0.15 mm. The stainless steel strip is different from a common stainless steel strip, special alloy elements are added, the high-temperature resistance and the corrosion resistance of the stainless steel strip are enhanced, and the forming and welding performance of the stainless steel strip is improved through alloying. The stainless steel strip is added with alloy elements and has the following functions:
the main functions of adding various alloy elements are as follows:
cr: determining the elements of the stainless steel, and improving the corrosion resistance and the strength of the stainless steel;
si: the oxidation resistance of the stainless steel and the hardness, yield strength and tensile strength during welding are improved;
mo: the stainless steel matrix is strengthened, the high-temperature strength and the creep property of the stainless steel are improved, a passive film of the stainless steel is stabilized, and the corrosion resistance is improved;
ni: the stability of a stainless steel passive film is promoted, the thermodynamic stability of the stainless steel is improved, the plasticity and toughness of the stainless steel are improved, and the cold formability and the weldability of the stainless steel are improved;
mn: the high temperature resistance strength is improved, the hot brittleness caused by sulfur and the like is eliminated, and the hot processing performance is improved;
n: the creep property is improved, the intergranular corrosion sensitivity of the stainless steel is reduced, and the corrosion resistance of the stainless steel is improved; ti: the method has the advantages of refining grain strength, reducing aging sensitivity and cold brittleness, improving welding performance and avoiding intergranular corrosion.
The stainless steel band provided by the invention is processed by a progressive forming technology and a precisely controlled laser welding technology, so that the ultrathin corrosion-resistant high-temperature-resistant stainless steel micro-tube can be manufactured.
Based on the novel special alloy stainless steel band with the width of 3mm and the thickness of 0.15mm, the special alloy stainless steel band is used for producing a protective tube suitable for communication optical fibers, and has two main technical contents: special alloy stainless steel band technology and special alloy stainless steel microtube technology.
A method for manufacturing stainless steel band comprises adding high-carbon ferrochrome 160-200 Kg per ton of steel with Ni-containing pig iron as base material, smelting stainless steel mother liquor in an electric arc furnace, and controlling tapping temperature at 1600 deg.C0(ii) a N: 0.1 to 0.16; less than or equal to 0.030; s: less than or equal to 0.030; p: less than or equal to 0.035 wt%, and Fe for the rest. And sending the alloyed stainless steel water to an LF furnace for refining for 45-90min, and then sending the stainless steel water to a continuous casting machine set to form a square billet, wherein the liquid level of a continuous casting tundish is kept at 900-1000mm in order to ensure the purity of the steel water, so that the phenomenon of secondary pollution of the steel water, such as slag entrapment and the like, is avoided in the continuous casting process. The square blank formed by continuous casting is hot-rolled to obtain a conventional hot-rolled black skin coil, and a stainless steel coil with the thickness of 0.15mm is produced by adopting a continuous rolling technology of a 20-roll mill after annealing and acid washing and multiple rolling processes. The hot rolling heating temperature is 1160-1290 ℃, the alloy is smelted by a GOR converter, 2-3 Kg/t of Mn alloy, 3-4 Kg/t of Mo alloy and 0.8-1 Kg/t of Ti alloy are added for alloying, and alloyed molten steel is obtained. The converter molten steel is subjected to three-step method of decarburization by a three-decarburization converter, primary decarburization by an AOD furnace and vacuum refining decarburization by a VOD furnace to obtain stainless steel, and the stainless steel comprises the following chemical components in percentage by mass: 16.00 to 18.00; si: less than or equal to 0.50; mo: less than or equal to 3; ni: 10.00-12.00; mn: less than or equal to 2.00; ti: 5 to 0.80 percent of C0C, a crimping temperature of 700-800 DEG C0C, solid solution temperature of 1010-11200C. The method comprises the steps of treating a precisely rolled stainless steel coil with surface rolling oil through a degreasing unit, obtaining a precise alloy stainless steel band with high surface quality through a bright annealing unit, softening and hardening the band steel through a stretching and straightening unit, and finally longitudinally cutting the precise alloy stainless steel band through a longitudinal cutting unit to obtain the ultrathin corrosion-resistant and high-temperature-resistant stainless steel band coiled material with the width of 3mm and the thickness of 0.15mm, wherein the ultrathin corrosion-resistant and high-temperature-resistant stainless steel band coiled material is required by the invention and can be used for developing a novel communication optical fiber unit and is welded into an ultrathin stainless steel micro-tube with the thickness of 0.15mm and the outer diameter of 0.9mm through laser seamless welding.
K-OBM-S, STB and the like. Refining) the gas oxygen Refining method is a stainless steel Refining process developed by the ukrainian national institute of metallurgy. The GOR refines the stainless steel mother liquor by utilizing a converter composite blowing technology and adopting an electric furnace-GOR converter two-step production process, and the bottom blowing principle and the furnace type are similar to Oxygen GOR (Gas)
AOD furnace (argon oxygen decarburization furnace), refining equipment for argon oxygen refining, is named by the acronym for the English name of the French name. The shape of the furnace body is similar to that of a converter, and the furnace body is arranged on a supporting ring which can be tilted forwards and backwards and is fixed by a pin.
VOD is an external refining technology for producing high-chromium stainless steel by blowing oxygen for decarburization and blowing argon for stirring under the vacuum condition, and is a short name of a vacuum oxygen blowing decarburization method.
An LF FURNACE (LADLE FURNACE), namely a LADLE refining FURNACE, is a main external refining device in steel production. LF furnaces are generally referred to as refining furnaces in the steel industry. In practice, it is a special form of electric arc furnace.
The stainless steel strip provided by the invention further improves the corrosion resistance and high temperature resistance, improves the forming and welding performance on the basis of the existing stainless steel strip technology, and the ultrathin stainless steel microtube produced on the basis of the stainless steel strip can be used for manufacturing novel optical fiber units required by emergency repair, sensing, security protection, aviation, ships, field operations and special occasions.
As shown in figures 2 to 3, a method for forming a micro-tube of a stainless steel band, firstly, a special alloy stainless steel 1 band with the width of 3mm and the thickness of 0.15mm reaches a cleaning device through a conveying device to be cleaned, and the conveying process and the forming process are ensured not to be damaged by foreign body friction. Then the stainless steel band is conveyed to a bilateral cutting machine by a conveying device, the stainless steel band is cut into a steel band 2 with the width of about 2.83mm by a bilateral cutting mode, finally, progressive forming is carried out by a special progressive forming device 3, and a micro-tube 4 with the outer diameter of 0.9mm is formed by a plurality of micro-tube forming dies with gradually changed sizes. The stainless steel microtubes which are molded gradually are conveyed to cleaning equipment by a conveying device to be cleaned before welding, so that the cleaning of the welding surface is ensured, and the formation of welding seams caused by foreign matters on the welding surface is avoided. The steel pipe is subjected to laser butt welding in a thermal conductivity welding mode through a precisely controlled laser welding machineAnd the light beam 5 acts on a forming interface 6 of the stainless steel micro-tube 7, and after welding, the welding seam eddy current inspection is carried out. The welding power density requirement of the laser welding is 105W/cm2The welding speed is controlled to be about 2m/min, the defocusing amount is 1mm, and the pulse width is 2.0 ms.
As shown in fig. 1, a stainless steel strip manufacturing equipment comprises an electric arc furnace 101, an AOD furnace 102, a VOD furnace 103 and a continuous casting machine 104, wherein a discharge port of the electric arc furnace 101 is in butt joint with a feed port of the AOD furnace 102, a discharge port of the AOD furnace 102 is in butt joint with a feed port of the VOD furnace 103, a discharge port of the VOD furnace 103 is in butt joint with a feed port of the continuous casting machine 104, a GOR converter is connected between the electric arc furnace 101 and the AOD furnace 102, an LF furnace is connected between the VOD furnace 103 and the continuous casting machine 104, a discharge port of the continuous casting machine 104 is connected with a rolling mill 105, a discharge port of the rolling mill 105 is connected with a degreasing unit 106, a discharge port of the degreasing unit 106 is connected with a bright annealing unit 107, a discharge port of the bright annealing unit 107 is connected with a stretching and straightening.
The stainless steel strip has the advantages of oxidation resistance, acid medium corrosion resistance, excellent atmospheric corrosion resistance, non-oxidative acid corrosion resistance, high-temperature strength and intercrystalline corrosion resistance, and good plasticity, toughness and welding performance, so that the stainless steel strip is more suitable for forming and welding the microtubes. The stainless steel microtube developed based on the stainless steel band is used for a novel communication optical fiber unit developed further and can be more suitable for the requirements of special use occasions.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A stainless steel strip characterized by: the following alloy elements are added: cr, Si, Mo, Ni, Mn, N, Ti.
2. A method for manufacturing a stainless steel strip, characterized in that: adding high-carbon ferrochrome into Ni-containing pig iron serving as a base material, smelting stainless steel mother liquor, smelting the stainless steel mother liquor through a GOR converter, and adding Mn alloy, Mo alloy and Ti alloy for alloying to obtain alloyed molten steel; the alloyed molten steel is subjected to three-step method smelting of stainless steel through converter decarburization, AOD furnace preliminary decarburization and VOD furnace vacuum refining decarburization to obtain a stainless steel with the chemical components of Cr: 16.00 to 18.00; si: less than or equal to 0.50; mo: less than or equal to 3; ni: 10.00-12.00; mn: less than or equal to 2.00; ti: 5% by C to 0.80 ; n: 0.1 to 0.16; less than or equal to 0.030; s: less than or equal to 0.030; p: less than or equal to 0.035 wt%, and the balance Fe; and sending the stainless steel water to an LF furnace for refining, sending the stainless steel water to a continuous casting machine set to form a square blank, and carrying out hot rolling on the square blank formed by continuous casting to obtain the hot-rolled black skin roll.
3. The method for manufacturing a stainless steel strip according to claim 2, wherein: adding high-carbon ferrochrome 160-200 Kg per ton of steel by taking Ni-containing pig iron as a base material, smelting stainless steel mother liquor in an electric arc furnace, and controlling the tapping temperature to 1600 DEG C0And C, smelting by a GOR converter, adding 2-3 Kg/t of Mn alloy, 3-4 Kg/t of Mo alloy and 0.8-1 Kg/t of Ti alloy for alloying to obtain alloyed molten steel, and smelting stainless steel by the alloyed molten steel through a three-step method of converter decarburization, AOD furnace preliminary decarburization and VOD furnace vacuum refining decarburization to obtain the alloy containing Cr: 16.00 to 18.00; si: less than or equal to 0.50; mo: less than or equal to 3; ni: 10.00-12.00; mn: less than or equal to 2.00; ti: 5% by C to 0.80 ; n: 0.1 to 0.16; less than or equal to 0.030; s: less than or equal to 0.030; p: less than or equal to 0.035 wt%, and the balance Fe; the stainless steel water is sent to an LF furnace for refining for 45-90min and then sent to a continuous casting machine set to form a square billet, in order to ensure the purity of the steel water, the liquid level of a continuous casting tundish is kept at 900-1000mm, and the phenomenon of secondary pollution of the steel water such as slag entrapment and the like is ensured to occur in the continuous casting process, the continuously cast square billet is subjected to hot rollingObtaining the hot-rolled black skin coil.
4. The method for manufacturing a stainless steel strip according to claim 3, wherein: and the hot-rolled black coil is annealed and pickled, and then is rolled by adopting a continuous rolling technology of a rolling mill for multiple times to produce the stainless steel coil.
5. The method for manufacturing a stainless steel strip according to claim 4, wherein: the hot rolling heating temperature is 1160-12900C, a crimping temperature of 700-800 DEG C0C, solid solution temperature of 1010-11200C。
6. The method for manufacturing a stainless steel strip according to claim 5, wherein: the method comprises the following steps of treating a surface rolling oil on a precisely rolled stainless steel coil by a degreasing unit, then obtaining a precise alloy stainless steel band by a bright annealing unit, softening and hardening the band steel by a stretching and straightening unit, and finally longitudinally cutting the precise alloy stainless steel band by a longitudinal cutting unit to obtain the stainless steel band.
7. A method for forming a microtube of a stainless steel strip, characterized by: conveying the stainless steel strip of claim 6 by a conveying device to a cleaning device to clean the stainless steel strip, ensuring that the conveying process and the forming process are not damaged by friction of foreign matters, then the stainless steel band is conveyed to a bilateral cutting machine by a conveying device, the stainless steel band is cut into a steel band with a set width by a bilateral simultaneous cutting mode, finally, the stainless steel band is gradually formed by a progressive forming device through a plurality of microtubule forming dies with gradually changed sizes to form a microtube, the microtube which is gradually formed is conveyed to a cleaning device by the conveying device to finish cleaning before welding, the welding surface is ensured to be clean, and a welding seam is prevented from being formed by foreign matters on the welding surface, the method is characterized in that a micro pipe is subjected to laser butt welding by a precisely controlled laser welding machine in a thermal conduction welding mode, welding seam eddy current inspection is carried out after welding is finished, and the welding power density requirement is 10 during laser welding.5W/cm2The welding speed needs to be controlled at 2m/min, and the defocusing amount adopts positive separationFocal length 1mm, pulse width 2.0 ms.
8. A manufacturing equipment of stainless steel band, characterized by: including electric arc furnace, AOD stove, VOD stove and conticaster, the discharge gate of electric arc furnace with the feed inlet butt joint of AOD stove, the discharge gate of AOD stove with the feed inlet butt joint of VOD stove, the discharge gate of VOD stove with the feed inlet butt joint of conticaster.
9. The apparatus for manufacturing a stainless steel strip according to claim 8, wherein: and a GOR converter is connected between the electric arc furnace and the AOD furnace, and an LF furnace is connected between the VOD furnace and the continuous casting machine.
10. The apparatus for manufacturing a stainless steel strip according to claim 8, wherein: the discharge port of the continuous casting machine is connected with a rolling mill, the discharge port of the rolling mill is connected with a degreasing unit, the discharge port of the degreasing unit is connected with a bright annealing unit, the discharge port of the bright annealing unit is connected with a stretching and straightening unit, and the discharge port of the stretching and straightening unit is connected with a longitudinal cutting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113810.7A CN110846595A (en) | 2019-11-14 | 2019-11-14 | Stainless steel strip, method and apparatus for manufacturing the same, and method of forming microtube |
Applications Claiming Priority (1)
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