期刊文献+

Microstructure Control of Non-quenched and Tempered CT80Grade Coiled Tubing Steel 被引量:5

Microstructure Control of Non-quenched and Tempered CT80Grade Coiled Tubing Steel
原文传递
导出
摘要 Complex working condition of coiled tube (CT) steel demands high strength and low ratio of yield strength (YS) to tensile strength (TS). Reasonable microstructure control is a key problem of CT steel. Controlled rolling and controlled cooling experiments were carded out by two kinds of tested steels with different chemical compositions to develop the non-quenched and tempered CT80 steel. Mechanical properties of the tested steels at different processes are all in good agreement with the properties requirement of CT80. Increasing of Mo and Nb contents improves transformation of acicular ferrite and martensite-austenite (M-A) islands. 4 vol% of fine M/A islands increase TS and decreases ratio of YS/ TS, Cooling rate increasing also improves acicular ferrite transformation and enhances TS, but has little effect on ratio of YS/TS. To meet the requirement of high strength and low ratio of YS/TS, optimized complex microstructure of the CT80 steel is composed of acicular ferrite, about 30 vol% of bainite and 4 vol% of M-A islands. Complex working condition of coiled tube (CT) steel demands high strength and low ratio of yield strength (YS) to tensile strength (TS). Reasonable microstructure control is a key problem of CT steel. Controlled rolling and controlled cooling experiments were carded out by two kinds of tested steels with different chemical compositions to develop the non-quenched and tempered CT80 steel. Mechanical properties of the tested steels at different processes are all in good agreement with the properties requirement of CT80. Increasing of Mo and Nb contents improves transformation of acicular ferrite and martensite-austenite (M-A) islands. 4 vol% of fine M/A islands increase TS and decreases ratio of YS/ TS, Cooling rate increasing also improves acicular ferrite transformation and enhances TS, but has little effect on ratio of YS/TS. To meet the requirement of high strength and low ratio of YS/TS, optimized complex microstructure of the CT80 steel is composed of acicular ferrite, about 30 vol% of bainite and 4 vol% of M-A islands.
出处 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2014年第3期464-468,共5页 金属学报(英文版)
基金 supported by the Beijing Higher Education Young Elite Teacher Project (No. YETP0355) the Fundamental Research Funds for the Central Universities of China (No. FRF-TP-12-046A)
关键词 Coiled tube M-A islands Acicular ferrite Mechanical properties Coiled tube M-A islands Acicular ferrite Mechanical properties
  • 相关文献

同被引文献52

引证文献5

二级引证文献24

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部