Effect of Zr-Ti deoxidisation on the hydrogen-induced cracking of X65 pipeline steels

被引：9
作者：
Du, Y. [1 ]
Wu, K. M. [1 ]
Cheng, L. [1 ]
Li, Y. [1 ]
Isayev, O. [1 ]
Hress, O. [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Hubei Prov Key Lab Syst Sci Met Proc, State Key Lab Refractory Mat & Met, Wuhan 430081, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Zr-Ti combined deoxidisation; HIC; Centre segregation; Inclusions; MnS; STRESS-CORROSION CRACKING; HEAT-AFFECTED ZONE; LOW-ALLOY STEELS; COMBINED DEOXIDATION; MICROSTRUCTURES; INCLUSIONS; FERRITE; METALS;
D O I：
10.1080/02670836.2016.1157971
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of Zr-Ti combined deoxidisation, compared with the traditional Al deoxidisation, on inclusion and microstructure in X65 pipeline steels was investigated by means of analytical characterisation techniques such as non-aqueous solution electrolysis method, optical and electron microscopy in conjunction with energy dispersive X-ray spectroscopy and hydrogen-induced cracking test. Large inclusions as well as elongated MnS particles were observed in the conventional Al-deoxidised steel. However, the type and size of inclusions were efficiently controlled in the Zr-Ti-deoxidised steel, in which MnS particles were spheroidised and evenly dispersed in the matrix. Hydrogen-induced cracking test results showed that centre segregation was the main factor accountable for hydrogen-induced cracking in X65 pipeline steels. The Zr-Ti-deoxidised X65 pipeline steel revealed better HIC-resistance performance.
引用
收藏
页码：728 / 735
页数：8
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