Method for preparing Iron Steel Rods with unamicroestructura composed predominantly of Tempered Martensitic Fine GrainThe Steel Plate and Method for Controlling the average ratio of the length of the Pancake during the processing of Iron.

摘要

A heavy-duty Steel, weldable, Low Alloy, containing by weight less than 9% Nickel,With excellent cryogenic temperature for and the Base Plate and the Heat Affected Zone (Zac) to be a Soldier,With a tensile strength exceeding one 830 MPa (120 KSI) and a microstructure comprising predominantly fine-grained Lower bainite, fine-grained, lukewarmFine granular bainite (BGF) heated, or mixtures of these.It is prepared by heating an iron, which comprises Iron and Steel Weight percentages of some or all of the specified Additives of carbon, nitrogen, Manganese, Nickel, Copper, Chromium.Silicon, Molybdenum, niobium, Vanadium, Titanium,Aluminum and Boron; reducuendo Iron to form a sheet in one or more passes at a range of temperatures at which the austenite recrystallizes; Finishing Laminate the sheet or in aMore passes to a range of temperature below the recrystallization temperature of austenite.And above the transformation temperature AR3; Turning off the finished sheet laminationA Temperature Pressure shutdown shutdown; stopping and Tempering the sheet at an adequate temperature for a sufficient period of time to produceParticles in precipitation hardening.