Effect of rare earth la on the properties and microstructure of BT100H heavy oil thermal recovery casing

摘要

Effect of La on yield strength,tensile strength elongation,and impact energy at low temperature (0℃to-60℃) of BT100H 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 BT100H casing for heavy oil thermal recovery were also investigated by electronic microscopy.TEN,SEM and EDS.