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Austenitic stainless steel clad steel plate and process for manufacturing same

A technology of cladding steel plate and manufacturing method, which is applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., can solve problems such as ensuring the corrosion resistance of cladding materials, and achieve excellent sensitization resistance characteristics , Excellent bonding effect

Active Publication Date: 2016-06-08
JFE STEEL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this technique, there is also no mention of a method of ensuring the corrosion resistance of the cladding material

Method used

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  • Austenitic stainless steel clad steel plate and process for manufacturing same
  • Austenitic stainless steel clad steel plate and process for manufacturing same
  • Austenitic stainless steel clad steel plate and process for manufacturing same

Examples

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Effect test

Embodiment 1

[0081] Hereinafter, examples of the present invention will be described. For the mechanical properties of the base material, tensile test pieces and DWTT test pieces conforming to API-5L were used to perform tensile tests and DWTT (DropWeightTearTest) tests (drop weight tear tests). In the DWTT test, the test temperature was set to -10°C.

[0082] In addition, for the corrosion resistance test of the cladding material, according to the ferric chloride corrosion test method of stainless steel in JISG0578:2000, the immersion test is carried out at a test temperature of 50 ° C, and the corrosion loss is less than 60g / (m 2 ·hr) is considered to be excellent in corrosion resistance of the cladding material.

[0083] In addition, the bondability as a clad steel plate was performed in accordance with the shear strength test described in the test method of the clad steel plate of JISG0601:2012. Regarding the evaluation criteria, it was judged that the bondability was good when the s...

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Abstract

Provided are: an austenitic stainless steel clad steel plate which exhibits excellent corrosion resistance, particularly excellent sensitization resistance characteristics, and in which excellent junction is achieved between a base metal and a cladding material,and a process for manufacturing the same. An austenitic stainless steel clad steel plate which comprises both a cladding material that contains, in mass%, 0.020% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.030% or less of S, 12.00 to 15.00% of Ni, 16.00 to 18.00% of Cr and 2.00 to 3.00% of Mo with the balance being Fe and unavoidable impurities and that has either a partially recrystallized austenite grain structure or a recrystallized austenite grain structure and a base metal that is superposed on the cladding material and bonded thereto and which exhibits a shear strength of 300MPa or more.

Description

technical field [0001] The present invention relates to an austenitic stainless steel clad steel plate used for chemical tankers, pressure vessels, pipelines, etc. Background technique [0002] The clad steel plate is a high-performance steel plate that has both the mechanical properties of the base material and the corrosion resistance of the cladding material (cladding material), and is excellent in economical efficiency. Austenitic stainless steel clad steel sheets are often used for chemical tankers, but with the development of the energy development field, the need for pipeline applications is expected. In recent years, the development of energy resources has been carried out in areas called difficult-to-mine environments, and such environments require more than ever the low-temperature toughness of the base material, especially the property of stopping the propagation of brittle fractures, and the corrosion resistance of the cladding material. [0003] The so-called c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C21D8/02C22C38/58
CPCC21D8/02C22C38/00C22C38/58C21D6/004C21D8/0247C21D2211/001C21D2251/02B32B15/01B32B15/011C22C38/02C22C38/04C22C38/12C22C38/14C22C38/40C22C38/44C21D6/008C21D8/0226C21D8/0263C21D1/02
Inventor 横田智之橘俊一黑沼洋太三田尾真司
Owner JFE STEEL CORP
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