Method for determining hot working temperature interval of low-alloy high-strength steel for oceanographic engineering

• Main Authors: NING BAOQUN, DONG ZHIZHONG, LIU JIANYU, WANG ZHIQI
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2020
• Subjects: ALLOYS; CALCULATING; CHEMISTRY; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PHYSICS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for determining a hot working temperature interval of low-alloy high-strength steel for oceanographic engineering, and belongs to the technical field of steel processing for oceanographic engineering. The method comprises the following steps: firstly, carrying out a high-temperature compression experiment on the low-alloy steel to obtain a true stress-strain curve,then establishing a high-temperature deformation constitutive equation and a thermal deformation machining graph of the material by adopting a hyperbolic sine model, and determining structure evolution mechanisms of different regions in the machining graph by combining a microscopic structure. A thermal deformation constitutive model and a thermal machining graph are combined, the thermal deformation rheological stress and the thermal deformation power dissipation efficiency under any deformation condition are analyzed, and therefore the optimal thermal machining temperature interval is obtained, and the result is of