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焊丝和焊剂对高强管线用钢焊接接头韧性的影响
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作者 李根全 孟澜全 杨满存 《焊接》 北大核心 1992年第8期9-12,共4页
通过对管线用高强度热轧带钢的焊接性试验和制管试生产,找到了较合适的焊丝和焊剂,解决了螺旋埋弧焊管焊缝高韧性问题,提高了焊管在高落差、低温条件下服役的安全性和可靠性。
关键词 焊缝韧性 焊丝 焊剂 高强管线用钢 埋弧焊
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Latest Development and Application of High Strength and Heavy Gauge Pipeline Steel in China 被引量:3
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作者 Zhang Yongqing Guo Aimin +3 位作者 Shang Chengjia Liu Qingyou J. Malcolm Gray Frank Barbaro 《Journal of Mechanics Engineering and Automation》 2016年第1期19-24,共6页
Over the past twenty years, significant advances have been made in the field of microalloying and associated applications, among which one of the most successful application cases is HTP practice for heavy gauge, high... Over the past twenty years, significant advances have been made in the field of microalloying and associated applications, among which one of the most successful application cases is HTP practice for heavy gauge, high strength pipeline steels. Combined the strengthening effects of TMCP and retardation effects of austenite recrystallization with increasing Nb in austenite region, HTP conception with low carbon and high niobium alloy design has been successfully applied to develop X80 coil with a thickness of 18.4 mm used for China's Second West-East pipeline. During this process, big efforts were made to further develop and enrich the application of microalloying technology, and at the same time the strengthening effects of Nb have been completely unfolded and fully utilized with improved metallurgical quality and quantitative analysis of microstructure. In this paper, the existing status and strengthening effect of Nb during reheating, rolling and cooling have been analyzed and characterized based on mass production samples and laboratory analysis. As confirmed, grain refinement remains the most basic strengthening measure to reduce the microstructure gradient along the thickness, which in turn enlarges the processing window to improve upon low temperature toughness, and finally make it possible to develop heavy gauge, high strength pipeline steels with more challenging fracture toughness requirements. As stated by a good saying that practice makes perfect. Based on application practice and theoretical analysis, HTP has been extended to develop heavy gauge and high strength pipeline steels with increasing requirements, including X80 SSAW pipe with a thickness of 22.0 mm and above, X80 LSAW pipe combining heavy gauge and large diameter, heavy gauge X80 LSAW pipe with low temperature requirements, as well as X90 steels. In this paper, alloy design, production processing, as well as mechanical properties and microstructure used for these products would be illustrated. 展开更多
关键词 HTP high strength pipeline steel low carbon bainitic microstructure.
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