焊管
銲管
한관
WELDED PIPE AND TUBE
2015年
5期
13-17
,共5页
高Nb钢%X80管线钢%M/A岛%合金成分%冷却速度
高Nb鋼%X80管線鋼%M/A島%閤金成分%冷卻速度
고Nb강%X80관선강%M/A도%합금성분%냉각속도
high Nb steel%X80 pipeline steel%M/A islands%alloy composition%cooling rate
以高Nb X80管线钢为研究对象，对钢中M/A岛的大小、形貌和分布特征进行了分析。结果表明，冷却速度的提高使钢中M/A岛尺寸更为细小，分布更为弥散、均匀，形貌趋于圆形或球状，有利于提高管线钢的力学性能；相同的冷却速度下，提高Nb含量可以促进了条状M/A岛的生成，说明高Nb含量促进了M/A岛从点状、块状向条状的转变；合金成分和冷却速度的调整可以减少M/A岛对钢性能产生的不利影响。
以高Nb X80管線鋼為研究對象，對鋼中M/A島的大小、形貌和分佈特徵進行瞭分析。結果錶明，冷卻速度的提高使鋼中M/A島呎吋更為細小，分佈更為瀰散、均勻，形貌趨于圓形或毬狀，有利于提高管線鋼的力學性能；相同的冷卻速度下，提高Nb含量可以促進瞭條狀M/A島的生成，說明高Nb含量促進瞭M/A島從點狀、塊狀嚮條狀的轉變；閤金成分和冷卻速度的調整可以減少M/A島對鋼性能產生的不利影響。
이고Nb X80관선강위연구대상，대강중M/A도적대소、형모화분포특정진행료분석。결과표명，냉각속도적제고사강중M/A도척촌경위세소，분포경위미산、균균，형모추우원형혹구상，유리우제고관선강적역학성능；상동적냉각속도하，제고Nb함량가이촉진료조상M/A도적생성，설명고Nb함량촉진료M/A도종점상、괴상향조상적전변；합금성분화냉각속도적조정가이감소M/A도대강성능산생적불리영향。
In this article, it took high-Nb X80 pipeline steel as research object to analyze the size, morphology and distribution characteristics of M/A islands. The results showed that increasing cooling rate can make M/A islands become more fine and uniform, and the shape tends to be round or globular, it is in favour to improve the mechanical properties of pipeline steel. Under the same cooling rate, increasing Nb content can improve M/A islands forming, it explained high Nb content to promote M/A islands transformation from the dot, block to strip. The adverse effects on steel properties of the M/A islands can be reduced when the composition and cooling rate are adjusted.
