Development of Controlled Rolling Process for N80-1 Steel Tube in ARE Tube-rolling Train
LI Jing
LIANG Jianshan
LIU Jinpeng
Abstract：The thesis introduces the development of N80-1 steel tube with 178 mm diameter billets, which meets the requirements of specification of API 5CT. With the process controlling of billets’heating and dimension forming, this steel tube was manufactured by controlled rolling process instead of normalized in the ARE tube-rolling mill. The results showed that the microstructure of the product is ferrite and pearlite, which particle is homogeneous and fine with a degree higher than 8;the tensile strength is between 781 and 819 MPa, the yield strength is between 615 and 660 MPa, the elongation is between 26%and 29%;the extreme difference of hardness is 24.5 HV on wall thickness direction, 18 HB on circumferential direction and 23 HB on longitudinal direction; the calculated processing capability indices are 1.638. The performances of the whole tube are homogeneity and the processing ability is sufficient.
Keywords：ARE tube-rolling trainsteel tubecontrolled rollingprocess controlproperty
Publication Date：2014-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 18-19,21 )