Carbon steel and austenitic stainless steel combined steel plate and production method thereof

A technology of austenitic stainless steel and composite steel plate, which is applied in natural gas steel pipe, carbon steel and austenitic stainless steel composite steel plate and its production, manufacturing and transportation of corrosive petroleum fields, and can solve the problem that carbon steel cannot meet the corrosion resistance requirements, etc. problem, to achieve good resistance to hydrogen-induced cracking, good resistance to intergranular corrosion, and good composite effect

Inactive Publication Date: 2015-07-08
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current oil pipeline is generally made of low carbon steel, such as API B-X70, X80 and other steel grades. However, with the development of corrosive oil and gas and offshore oil and gas in the future, general carbon steel cannot meet its corrosion resistance requirements. If you continue to use General pipeline steel will bring greater quality risk

Method used

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  • Carbon steel and austenitic stainless steel combined steel plate and production method thereof
  • Carbon steel and austenitic stainless steel combined steel plate and production method thereof
  • Carbon steel and austenitic stainless steel combined steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition of steel base material X70 in this experiment is C: 0.06%, Si: 0.02%, Mn: 1.55%, P: 0.005%, S: 0.002%, Alt: 0.03%, N: 0.005%, H: 0.0001%, in addition Ni: 0.10%, Cr: 0.15%, Nb: 0.02%, Ti: 0.015%. The composition of the clad layer 316L meets the requirements of the ASTM A240M-05 standard "Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plates, Sheets and Strips for Pressure Vessels and General Purposes", and the weight percentage is C: 0.02%, Mn: 1.0% , Si: 0.4%, P: 0.03%, S: 0.01%, Cr: 16.5%, Ni: 10%, Mo: 2%. The steel plate specification is: (20+3)×2040×12000mm (thickness×width×length), of which the thickness of X70 is 20mm, and the thickness of stainless steel is 3mm.

[0022] The production process includes billet formation, heating, direct rolling, and warm water cooling, specifically:

[0023] (1) The steel billet smelted according to the chemical composition is designed and smelted for billet rolling; the carbon st...

Embodiment 2

[0030] The chemical composition of steel base material X70 in this experiment is C: 0.06%, Si: 0.02%, Mn: 1.55%, P: 0.005%, S: 0.002%, Alt: 0.03%, N: 0.005%, H: 0.0001%, in addition Ni: 0.10%, Cr: 0.15%, Nb: 0.02%, Ti: 0.015%. The composition of the clad layer 316L meets the requirements of the ASTM A240M-05 standard "Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plates, Sheets and Strips for Pressure Vessels and General Purposes", and the weight percentage is C: 0.02%, Mn: 1.0% , Si: 0.4%, P: 0.03%, S: 0.01%, Cr: 16.5%, Ni: 10%, Mo: 2%. The specifications of the steel plate are: (16+3)×2060×12000mm (thickness×width×length), of which the thickness of X70 is 16mm, and the thickness of stainless steel is 3mm.

[0031] The production process includes billet formation, heating, direct rolling, and warm water cooling, specifically:

[0032] (1) The steel billet smelted according to the chemical composition is designed and smelted for billet rolling; the ...

Embodiment 3

[0039] The chemical composition of steel base material X70 in this experiment is C: 0.06%, Si: 0.02%, Mn: 1.55%, P: 0.005%, S: 0.002%, Alt: 0.03%, N: 0.005%, H: 0.0001%, in addition Ni: 0.10%, Cr: 0.15%, Nb: 0.02%, Ti: 0.015%. The composition of the clad 316L meets the requirements of the ASTM A240M-05 standard "Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plates, Sheets and Strips for Pressure Vessels and General Purposes", and the weight percentage is C: 0.02%, Mn: 1.0% , Si: 0.4%, P: 0.03%, S: 0.01%, Cr: 16.5%, Ni: 10%, Mo: 2%. The steel plate specification is: (14+3)×1860×12000mm (thickness×width×length), of which the thickness of X70 is 14mm, and the thickness of stainless steel is 3mm.

[0040] The production process includes billet formation, heating, direct rolling, and warm water cooling, specifically:

[0041] (1) The steel billets smelted according to the chemical composition are designed and smelted for billet rolling; the carbon steel ...

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Abstract

The invention discloses a carbon steel and austenitic stainless steel combined steel plate and a production method thereof, and belongs to the technical field of metal composite plate production. A steel blank is adopted for symmetrical combination (dual-blank lamination) for the combined steel plate; the upper and lower layers are made from carbon steel made from X70 materials; the two middle layers are made from 316L stainless steel; scaling powder is not added between the carbon steel and the stainless steel; an insulation agent is added between stainless steel; then four edges of the steel blank are welded and sealed, and vacuumization treatment is carried out by using a vacuum dispersion pump. The blank assembling technology of the steel blank is that smelted X70 and 316L steel blanks are respectively subjected to blooming forging to the designed middle size; then the steel blank is subjected to surface polishing treatment; and then welding, edge sealing and vacuumization are carried out. The carbon steel and austenitic stainless steel combined steel plate and the production method thereof have the advantages that the use safety of a petroleum pipeline is improved, and great significance is achieved for the pipeline development of China.

Description

technical field [0001] The invention belongs to the technical field of metal composite plate production, and in particular relates to a carbon steel and austenitic stainless steel composite steel plate and a production method thereof, which are suitable for manufacturing steel pipes for transporting corrosive oil and natural gas. Background technique [0002] The current oil pipeline is generally made of low-carbon steel, such as API B-X70, X80 and other steel grades. However, with the development of corrosive oil and gas and offshore oil and gas in the future, general carbon steel cannot meet its corrosion resistance requirements. If you continue to use General pipeline steel will bring greater quality risk. The use of stainless steel and carbon steel composite plates as corrosive oil and gas transmission materials has significant advantages. It not only has the corrosion resistance of stainless steel materials, but also has the strength and toughness of general pipeline st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/18B23P15/00
Inventor 王小勇李家鼎孙启昆谌铁强李少坡张海王海宝郝宁刘建明隋鹤龙马长文白学军杨立明
Owner SHOUGANG CORPORATION
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