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Austenitic stainless steel clad steel plate and manufacturing method thereof

A technology for cladding steel plates and a manufacturing method, which is applied in chemical instruments and methods, layered products, metal layered products, etc., can solve the problem of not mentioning the corrosion resistance of cladding materials, and achieve excellent sensitization resistance characteristics. , excellent bonding effect

Active Publication Date: 2017-08-04
JFE STEEL CORP
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  • Summary
  • 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 manufacturing method thereof
  • Austenitic stainless steel clad steel plate and manufacturing method thereof
  • Austenitic stainless steel clad steel plate and manufacturing method thereof

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, take a tensile test piece and a DWTT test piece that comply with API-5L, and perform a tensile test and a DWTT (Drop Weight Tear Test) test (drop weight tear test). 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 JIS G0578:2000, the immersion test is carried out at the 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 sheet was carried out in accordance with the shear strength test described in JIS G0601:2012 Test methods for clad steel sheets. Regarding the evaluation criteria, it was judged that the bondability was good when th...

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Abstract

The present invention provides an austenitic stainless-steel clad steel sheet excellent in corrosion resistance, especially excellent in sensitization resistance, and excellent in bondability between a clad material and a base material, and a method for producing the same. An austenitic stainless clad steel plate comprising: a cladding material containing C: 0.020% or less, Si: 1.00% or less, Mn: 2.00% or less, and P: 0.045% in mass % Below, S: 0.030% or less, Ni: 12.00-15.00%, Cr: 16.00-18.00%, Mo: 2.00-3.00%, and the balance is composed of Fe and unavoidable impurities. The cladding material has the ability to partially recrystallize an austenitic grain structure of a microstructure or a recrystallized structure; and a base material formed so as to overlap with the cladding material, and the shear strength of the austenitic stainless steel clad steel plate is 300 MPa or more .

Description

technical field [0001] The present invention relates to an austenitic stainless clad steel plate used for chemical tankers, pressure vessels, pipelines, etc., and a manufacturing method thereof. 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 mate...

Claims

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Application Information

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Patent Type & Authority Patents(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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