摘要
文章通过对加入La以及不加稀土的BT100H实验钢力学性能检测,研究了La对其屈服强度、抗拉强度、延伸率、0^-60℃低温冲击功的影响,结果表明,相较于不加稀土的实验钢,加入La的实验钢屈服强度平均值提高6.3 MPa,抗拉强度平均值提高9.8 MPa,延伸率平均值提高近1%,实验温度从0降低到-60℃,14#实验钢冲击功降低了33.8%,不加稀土的实验钢冲击功降低60.7%;通过显微电镜、透射电镜、扫描电镜及能谱分析仪,研究了La对BT100H稠油热采专用套管实验钢显微组织、夹杂物及原始奥氏体晶粒度的影响,结果表明,La的加入使得BT100H实验钢碳化物分布更加弥散,夹杂物由带尖角多边形氧硫夹杂转变为球状稀土复合夹杂,原始奥氏体晶粒也因La的加入得到明显细化。
Effect of La on yield strength, tensile strength elongation, and impact energy at low temperature(0 to-60 ℃)of BT100 H steel was studied by mechanical property testing. The results show that, compared with the steel without La, yield strength, tensile strength and elongation of test steel with La increased 6.3 MPa, 9.8 MPa and 1% on average, respectively, and impact energy from-60 ℃ to 0 decreased 33.8% for No.14 steel and 60.7% for steel without La. Effects of La on microstructure inclusion, and original Austenitic grain size of BT100 H casing for heavy oil thermal recovery were also investigated by electronic microscopy. TEN, SEM and EDS. The results showed that addition of La makes carbide distribution in BT100 H steel more diffuse, inclusions covert to spherical rare earth compound from sulfur oxide in shape of polygen with sharp corners, and original Ausenite grain become more fine.
作者
石晓霞
李晓
任慧平
贺景春
张行刚
SHI Xiao-xia;LI Xiao;REN Hui-ping;HE Jing-chun;ZHANG Xing-gang(inner Mongolia University of Science&Technology,Baotou 014010,China;Baogang Steel Federation Co.Ltd.,Baotou 014010,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2020年第6期126-133,共8页
Chinese Rare Earths
关键词
稀土
BT100H
力学性能
显微组织
rare earth
BT100H
mechanical property
microscopic structure
