The quality experiment results of 20 heats 65Mn steel showed that the analyses of steel were C 0.63~0.68, Mn 0.95~1.07, P 0.009~0.023, S 0.006~0.017, and the deviation of carbon content at section of casting billet was ≤0.02%.
The reforming of once heating into product of continuous casting billet is done in 400mm×2/250mm×5 small section plant of Shiheng special steel works.
The distribution of size and frequency of inclusion in samples of surface layer of IF steel(1()150) mm×230 mm casting slab with unsteady casting speed(1.4 m/min to 0.6 m/min and 0.6 m/min to 1.4 m/min) has been studied by Original Position Analysis System(OPA-100).
The influence of heating temperature(1 200 ℃,1 180 ℃)of 180 mm cast slab,rolling passes for 2.3 mm hot coil(7 pass and 5 pass),finishing rolling temperature(780~860 ℃)and coil temperature(≤710 ℃)on iron loss and magnetic intensity of 0.5 mm cold rolled non-oriented silicon steel 50W600 has been tested.
The characteristics of structure and grain, yield strength - ultimate tensile strength (YS-UTS) ratio, and elongation of 2.0~12.7 mm steel Q345B strip produced by CSP process (71 mm cast slab) and conventional process (250 mm cast slab) have been analyzed by quantimet and statistic of product mechanical properties.
A new processing technique for seamless tubes manufacture of austenitic stainless steel is introduced,in which hollow cast blank is directly used for hot extrusion.
Quantitative fluid velocity and turbulence measurements, which were obtained using laser Doppler velocimetry (LDV) during the course of the physical modeling of the molten steel flow in a continuous casting billet mold, are presented.
Prerolling the cast slab about 25 pct produces a smaller grain size in the slab after reheating prior to hot rolling with the result of a uniform and improved texture in the product.
Prerolling the cast slab about 25 pct produces a smaller grain size in the slab after reheating prior to hot rolling with the result of a uniform and improved texture in the product.
Finite-element analysis is used to determine the temperatures in the mold and cast slab, and these data are then used in an elastic-viscoplastic analysis to investigate the deformation of the mold wall in service.
The microchemical results indicate that brittleness is induced by the presence of a low amount of lead that is retained in supersaturated solution when the cast blank was produced.