DEVELOPMENT OF HIGH PLASTICITY-TOUGHNESS LOW COST MICROALLOYED SUBMARINE PIPELINE STEEL
The paper is subjected to take some heat treatment process to improve the plasticity and toughness in low carbon microalloyed submarine pipeline steel.The results showed that the combination of furnace cooling after normalizing,annealing at AC1+60-100℃ and two-step intercritical tempering above AC1” can obtained the optimum plasticity.The uniform elongation and toughness was 23.82%and 230 J at-40℃ respectively with NLTT process.However,the uniform elongation was up to 26.26%with 16.49%(volume fraction)obtained austenite when the cooling mode was furnace cooling after normalizing in the N”LTT process.
normalizing annealing intercritical tempering obtained austenite
Sheng-fu Yuan Xiu-chen Li Cheng-jia Shang
Department of Materials Science and Technology University of Science and Technology,Bei Jing,Xueyuan Road 30,Haidian District,Bei Jing,China
国内会议
杭州
英文
1063-1069
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）