Effect of Crystal Textures and Microstructure on the Toughness of the Stretch Reduced Steel Tube in Austenite and Ferrite Two-phase Region

The hot stretch reducing process of steel tubes has been attracting attention as an effective means to achieve both high strength and excellent formability by developing the {011}<100> texture reducing in austenite and ferrite (α/γ) two-phase region. However, it has been known that, in the case of control-rolled steel plate, the textures developed by the hot rolling in the α/γ region closely relate with the brittle fracture.