Title:
LOW-ALLOY STEEL, PLATE AND WELDED PIPE RESISTANT TO CARBON DIOXIDE AND MICROORGANISM CORROSION, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/067480
Kind Code:
A1
Abstract:
Disclosed is a low-alloy steel. The low-alloy steel comprises, in addition to Fe and inevitable impurities, the following chemical elements in percentages by mass: C: 0.02%-0.1％, Si: 0.1%-1.5％, Mn: 0.10%-1.8％, Cr: 1.0%-5.5％, Ni: 0.3%-3.0％, Cu: 0.3%-4.8％, Mo: 0.10%-2.5％, V: 0.01%-0.2％, Al: 0.01%-0.1％, and REM: 0.1%-1.0％. The low-alloy steel of the present disclosure has good resistance to carbon dioxide and microorganism corrosion, and can be suitable for a service environment where microorganism corrosion and CO2 corrosion coexist. In addition, further disclosed in the present application are a plate and a welded pipe made of the low-alloy steel, and a manufacturing method for the plate and the welded pipe.
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Inventors:
QI YAMENG (CN)
ZHANG CHUNXIA (CN)
ZHANG ZHONGHUA (CN)
GAO ZHAN (CN)
ZHANG CHUNXIA (CN)
ZHANG ZHONGHUA (CN)
GAO ZHAN (CN)
Application Number:
PCT/CN2023/121089
Publication Date:
April 04, 2024
Filing Date:
September 25, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/58; C21D1/18; C21D8/10; C22C38/18; C22C38/20; C22C38/24; C22C38/34; C22C38/38; C22C38/40; C22C38/42; C22C38/44; C22C38/46
Foreign References:
| CN102199736A | 2011-09-28 | |||
| CN107619994A | 2018-01-23 | |||
| CN113667891A | 2021-11-19 | |||
| CN113802070A | 2021-12-17 | |||
| CN114657477A | 2022-06-24 | |||
| CN1401809A | 2003-03-12 | |||
| KR20170075863A | 2017-07-04 |
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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