摘要
基于Gray博士的低碳低锰专利设计X65MS管线钢的合金成分,通过Gleeble-3800热模拟试验机研究形变奥氏体的相变规律。将得到的膨胀量曲线,结合各个冷速下的金相显微组织以及显微硬度,绘制出CCT曲线。结果表明,对于该成分的X65MS管线钢,在40℃/s的冷却速度下,能够得到较高的抗H_2S腐蚀性能的单相贝氏体显微组织。同时,终冷温度不得低于480℃,以防止因为马氏体组织的出现而引起组织不均匀性,降低管线钢的抗H_2S腐蚀性能。
Based on Dr Gray＇s patent of low carbon and low manganese,chemical composition of X65 MS pipeline steel was designed and the phase transformation of deformed austenite was investigated using Gleeble -3800 simulation experiment machine. According to the swell increment curves,metallographic microstructure and hardness,the CCT curve was measured. The results show that the single bainite can be obtained under the cooling speed of 40 ℃ / s,which has high corrosion resistance to H2S. Meanwhile,the final cooling temperature should be higher than 480 ℃ in order to avoid the nonuniformity of microstructure caused by the emergence of martensite.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第11期75-78,共4页
Heat Treatment of Metals
关键词
低碳低锰
相变规律
膨胀量曲线
CCT曲线
抗H2S腐蚀
low carbon and low manganese
phase transition law
swell increment curve
CCT curve
corrosion resistance to H2S
