EFFECT OF THERMAL BARRIER COATINGS ABOVE MOULD MENISCUS ON MOULD HEAT TRANSFER AND OSCILLATION MARK MORPHOLOGY OF STRANDS

Oscillation marks are closely related to the surface quality of bloom. Excellent surface quality of bloom is essential assurance of the technology of continuous casting and rolling. The improvement of heat transfer process through mold is beneficial to alleviate oscillation marks. A new method of inhibiting formation of oscillation marks in continuous casting, namely spraying […]

Analysis on Initial Defects Based on Mechanical State of Meniscus Shell

The meniscus shell plays an important role in slab quality and process operation for continuously cast steel. One decisive reason is initial solidifying shell and growing dendrite under the mechanical stress caused by mold oscil- lation and liquid steel flow to generate disturbance of casting. The mechanical state of meniscus shell was analyzed using mathematical […]

Numerical Simulation of Flow Field and Submerged Entry Nozzle in Mold of Wide and Thick Slab Continuous Casting

A three-dimensional mathematical model was developed based on the equipment parameters and process conditions of arc caster for wide and thick slab continuous casting. The model was established on the basis of Navier-Stokes momentum equation and low Reynolds number turbulence κ-ε equation. The flow field of liquid steel with three different structures and sizes of […]

Study on Process Parameters of Constant Temperature Billet of High-speed Continuous Casting and Direct Rolling Process

The billet with constant temperature is an important condition to realize high-speed continuous casting and direct rolling process of long profiles. In order to successfully realize the continuous casting billet with constant temperature, the influence of casting speed, cooling intensity and slab comer radius in the process from mold meniscus to cutting point location on […]

Effect of the vertical height on inclusions in extra-thick slab

Inclusion is an important defect in reducing the slab internal quality. Increasing the vertical height of caster is conducive to reduce the number of slab internal inclusions and improve its distribution. In order to find out the most appropriate vertical height of caster, CFD model was adopted to study the effect of the vertical height […]

Study on the Mold Flow State Influenced by Two-hole Nozzle

The particle image velocimetry-PIV technique was used to study the factors affecting the flow state in the continuous casting mold. iWith the increase of casting speed, the distance of narrow face im- pact point to level decreases, and difference in the level flow velocity decreases, resulting in the flow state tending to be symmetric. With […]

Trial Production of Continuous Casting AAR M-101 F Axle Billet

The molten steel purity is controlled during smelting process, and superheat degree is controlled during continuous casting process, and soaking temperature is controlled during casting billet heating process, and AAR M- 101 F steel produced by continuous casting can meet the requirements of technical agreement and achieve successful tri- M production.

Study on Reducing Clogging at Submerged Entry Nozzle in Continuous Casting Molten Aluminum Deoxidation Steel

The problem of clogging at submerged entry nozzle in continuous casting mohen aluminum deoxidized steel was analyzed. It was concluded that the A1203 inclusions accumulated at the inner wall of the submerged entry nozzle was the main cause leading to clogging at submerged entry nozzle. The new type of the refining slag was developed and […]