CN112605148A - Manufacturing process of seamless steel tube for seawater - Google Patents

Manufacturing process of seamless steel tube for seawater Download PDF

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Publication number
CN112605148A
CN112605148A CN202011345067.0A CN202011345067A CN112605148A CN 112605148 A CN112605148 A CN 112605148A CN 202011345067 A CN202011345067 A CN 202011345067A CN 112605148 A CN112605148 A CN 112605148A
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CN
China
Prior art keywords
less
steel pipe
seawater
equal
steel tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011345067.0A
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Chinese (zh)
Inventor
唐俊杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hengyang Hongchang Mechanization Co ltd
Original Assignee
Hengyang Hongchang Mechanization Co ltd
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Publication date
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Priority to CN202011345067.0A priority Critical patent/CN112605148A/en
Publication of CN112605148A publication Critical patent/CN112605148A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • 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
    • 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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • C—CHEMISTRY; METALLURGY
    • 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
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • 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
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B2045/026—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention relates to the technical field of steel pipe manufacturing processes, in particular to a manufacturing process of a seamless steel pipe for seawater, which comprises the following steps: smelting raw materials, by weight, including 0.1-0.15% of C, 0.20-0.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 7-9% of Cr, 0.7-0.8% of Mo, less than or equal to 0.20% of Cu, less than or equal to 0.015% of Al, and the balance of Fe into a metal bar blank, perforating the bar metal bar blank, carrying out first acid cleaning, polishing the surface of the steel pipe after the first acid cleaning, and carrying out second acid cleaning and lubrication: the concentration of hydrochloric acid is 20-30%, the temperature is 20-45 ℃, the time is 6-7 hours, and oxide skins and graphite residues on the inner and outer surfaces of the hot-expanding raw material steel pipe are cleaned. During cold rolling, the steel pipe and the cold roll are completely immersed in lubricating oil, so that the surface of the pipeline is smoother, the quality of the finished steel pipe is better, the steel pipe with the smooth surface is more difficult to permeate seawater to corrode the steel pipe, and the quality of the finally formed steel pipe is more excellent.

Description

Manufacturing process of seamless steel tube for seawater
Technical Field
The invention relates to the technical field of steel pipe manufacturing processes, in particular to a manufacturing process of a seamless steel pipe for seawater.
Background
Since the rapid development of science and technology brings about negative effects such as environmental pollution, people have gradually realized that the serious problem is that great energy and financial resources are invested in the aspect of environmental improvement, seawater has strong corrosivity, and when the marine operation is performed, such as offshore oil exploitation, if the corrosion resistance of a pipeline is not good, the pipeline is easy to leak, thereby bringing about great troubles to the environmental pollution.
Disclosure of Invention
The invention aims to solve the defect of poor corrosion resistance of a steel pipe used for offshore operation in the prior art, and provides a manufacturing process of a seamless steel pipe for seawater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing process of a seamless steel tube for seawater comprises the following steps: smelting raw materials, by weight, of 0.1-0.15% of C, 0.20-0.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 7-9% of Cr, 0.7-0.8% of Mo, less than or equal to 0.20% of Cu, less than or equal to 0.015% of Al and the balance of Fe into a metal bar blank, perforating the bar metal bar blank, carrying out first pickling, polishing the surface of the steel tube after the first pickling, then carrying out cold rolling, completely immersing the steel tube and a cold rolling roller into lubricating oil in the cold rolling process, carrying out anaerobic bright annealing on the steel tube after 1 cold rolling, carrying out second pickling and lubricating after sand blasting surface treatment: the concentration of hydrochloric acid is 20-30%, the temperature is 20-45 ℃, the time is 6-7 hours, oxide skins and graphite residues on the inner and outer surfaces of the hot-expanding raw material steel pipe are cleaned, and finally, the quality, the wall thickness, the outer diameter and the bending degree of the inner and outer surfaces are tested, and ultrasonic flaw detection is carried out.
And cold rolling and annealing are carried out in a vacuum environment.
The concentration of the lubricating oil liquid is 26-32%, the pH value is 12.5-13.5, the temperature of the prepared liquid is 45-55 ℃, and the treatment time is 35-50 minutes.
The temperature of the perforation is 1100-1250 ℃.
The weight percentage of the raw materials of the metal bar blank is 0.15 percent of C, 0.50 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.01 percent of S, 9 percent of Cr, 0.8 percent of Mo, less than or equal to 0.20 percent of Cu, less than or equal to 0.015 percent of Al, and the balance of Fe.
The invention provides a manufacturing process of a seamless steel tube for seawater, which has the beneficial effects that: during cold rolling, the steel pipe and the cold roll are completely immersed in lubricating oil, the surface of the pipeline can be smoother, the quality of the finished steel pipe is better, the steel pipe with the smooth surface is more difficult to permeate into and corrode the steel pipe, meanwhile, cold rolling and annealing are carried out in a vacuum environment, the inner gap of the steel pipe is favorably reduced, and the quality of the finally formed steel pipe is more excellent.
Detailed Description
The technical solutions in the following embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
A manufacturing process of a seamless steel tube for seawater comprises the following steps: smelting raw materials, by weight, of 0.1-0.15% of C, 0.20-0.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 7-9% of Cr, 0.7-0.8% of Mo, less than or equal to 0.20% of Cu, less than or equal to 0.015% of Al and the balance of Fe into a metal bar blank, perforating the bar metal bar blank, carrying out first pickling, polishing the surface of the steel tube after the first pickling, then carrying out cold rolling, completely immersing the steel tube and a cold rolling roller into lubricating oil in the cold rolling process, carrying out anaerobic bright annealing on the steel tube after 1 cold rolling, carrying out second pickling and lubricating after sand blasting surface treatment: the concentration of hydrochloric acid is 20-30%, the temperature is 20-45 ℃, the time is 6-7 hours, oxide skins and graphite residues on the inner and outer surfaces of the hot-expanding raw material steel pipe are cleaned, and finally, the quality, the wall thickness, the outer diameter and the bending degree of the inner and outer surfaces are tested, and ultrasonic flaw detection is carried out. And cold rolling and annealing are carried out in a vacuum environment.
During cold rolling, the steel pipe and the cold roll are completely immersed in lubricating oil, the surface of the pipeline can be smoother, the quality of the finished steel pipe is better, the steel pipe with the smooth surface is more difficult to permeate into and corrode the steel pipe, meanwhile, cold rolling and annealing are carried out in a vacuum environment, the inner gap of the steel pipe is favorably reduced, and the quality of the finally formed steel pipe is more excellent.
The concentration of the lubricating oil liquid is 26-32%, the pH value is 12.5-13.5, the temperature of the prepared liquid is 45-55 ℃, and the treatment time is 35-50 minutes.
The temperature of the perforation is 1100-1250 ℃.
In a more preferred embodiment, the raw material weight percentage of the metal bar stock is C0.15%, Mn 0.50%, P0.01% or less, S0.01% or less, Cr 9%, Mo 0.8%, Cu 0.20% or less, Al 0.015% or less, and the balance Fe. The presence of P in the steel can increase the brittleness of the steel and cause serious segregation of alloying elements, so that the content of P is strictly controlled, and too high content of Al can weaken the functions of other elements and also strongly reduce the endurance quality of the steel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. The manufacturing process of the seamless steel pipe for seawater is characterized by comprising the following steps: smelting raw materials, by weight, of 0.1-0.15% of C, 0.20-0.50% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 7-9% of Cr, 0.7-0.8% of Mo, less than or equal to 0.20% of Cu, less than or equal to 0.015% of Al and the balance of Fe into a metal bar blank, perforating the bar metal bar blank, carrying out first pickling, polishing the surface of the steel tube after the first pickling, then carrying out cold rolling, completely immersing the steel tube and a cold rolling roller into lubricating oil in the cold rolling process, carrying out anaerobic bright annealing on the steel tube after 1 cold rolling, carrying out second pickling and lubricating after sand blasting surface treatment: the concentration of hydrochloric acid is 20-30%, the temperature is 20-45 ℃, the time is 6-7 hours, oxide skins and graphite residues on the inner and outer surfaces of the hot-expanding raw material steel pipe are cleaned, and finally, the quality, the wall thickness, the outer diameter and the bending degree of the inner and outer surfaces are tested, and ultrasonic flaw detection is carried out.
2. The process for manufacturing seamless steel pipes for seawater as claimed in claim 1, wherein the cold rolling and annealing are performed in a vacuum environment.
3. The process for manufacturing the seamless steel tube for seawater as claimed in claim 1, wherein the concentration of the lubricating oil is 26-32%, the ph value is 12.5-13.5, the solution preparation temperature is 45-55 ℃, and the treatment time is 35-50 minutes.
4. The process for manufacturing seamless steel tube for seawater as claimed in claim 1, wherein the temperature of the perforation is 1100-1250 ℃.
5. The process for manufacturing the seamless steel tube for seawater as claimed in claim 1, wherein the raw materials of the metal bar blank comprise, by weight, 0.15% of C, 0.50% of Mn, 0.01% or less of P, 0.01% or less of S, 9% of Cr, 0.8% of Mo, 0.20% or less of Cu, 0.015% or less of Al, and the balance of Fe.
CN202011345067.0A 2020-11-26 2020-11-26 Manufacturing process of seamless steel tube for seawater Withdrawn CN112605148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011345067.0A CN112605148A (en) 2020-11-26 2020-11-26 Manufacturing process of seamless steel tube for seawater

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Application Number Priority Date Filing Date Title
CN202011345067.0A CN112605148A (en) 2020-11-26 2020-11-26 Manufacturing process of seamless steel tube for seawater

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831179A (en) * 2015-04-28 2015-08-12 苏州钢特威钢管有限公司 High-temperature resistant seamless austenitic stainless steel pipe and preparation method thereof
CN104862593A (en) * 2015-04-28 2015-08-26 苏州钢特威钢管有限公司 Ferritic stainless steel seamless steel tube and preparation method thereof
CN107639129A (en) * 2017-08-31 2018-01-30 宝丰钢业集团有限公司 The processing technology of corrosion-resistant stainless steel seamless steel pipe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831179A (en) * 2015-04-28 2015-08-12 苏州钢特威钢管有限公司 High-temperature resistant seamless austenitic stainless steel pipe and preparation method thereof
CN104862593A (en) * 2015-04-28 2015-08-26 苏州钢特威钢管有限公司 Ferritic stainless steel seamless steel tube and preparation method thereof
CN107639129A (en) * 2017-08-31 2018-01-30 宝丰钢业集团有限公司 The processing technology of corrosion-resistant stainless steel seamless steel pipe

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Application publication date: 20210406