Title:
MICROORGANISM-CORROSION-RESISTANT LOW-ALLOY STEEL MATERIAL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/181895
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a microorganism-corrosion-resistant low-alloy steel material and a method for producing the microorganism-corrosion-resistant low-alloy steel material. Provided is a microorganism-corrosion-resistant low-alloy steel material characterized by having a component composition comprising, in % by mass, 0.01 to 0.50% of C, 0.01 to 1.00% of Si, 0.10 to 3.00% of Mn, 0.030% or less of P, 0.0100% or less of S, 0.0100% or less of N, 0.001 to 0.30% of Al, 4.00% or less of Cr, 0.10 to 2.50% of Cu and a remainder comprising Fe and unavoidable impurities and also having a ratio of a minimum value to a maximum value (i.e., a (minimum value)/(maximum value) ratio) of the dislocation density of the steel sheet surface of 0.40 or more. Also provided is a method for producing a microorganism-corrosion-resistant low-alloy steel material, in which the final pass reduction ratio in a temperature range from 1000 to 1100°C is managed within a range from 5 to 20% during the hot rolling of a steel material having the above-mentioned component composition.
Inventors:
SAMUSAWA ITARU (JP)
SHIMAMURA JUNJI (JP)
MURAKAMI YOSHIAKI (JP)
SHIMAMURA JUNJI (JP)
MURAKAMI YOSHIAKI (JP)
Application Number:
PCT/JP2023/008448
Publication Date:
September 28, 2023
Filing Date:
March 07, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/02; C22C38/38; C22C38/60
Domestic Patent References:
| WO2015087531A1 | 2015-06-18 |
Foreign References:
| JP2014505170A | 2014-02-27 | |||
| JP2000160295A | 2000-06-13 | |||
| JP2017190522A | 2017-10-19 |
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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