4 results about "Narrow face" patented technology

This invention belongs to the field of steel production technology and discloses an effective production method for controlling edge defects in hot-rolled high-strength steel. The process includes converter smelting → LF refining → continuous casting → soaking furnace heating → hot continuous rolling → cooling and coiling. Specifically: the LF refining process controls the nitrogen content in the molten steel to be ≤40ppm at the end point; the continuous casting uses a funnel-shaped crystallizer with a taper ratio of 1.1%~1.3%, and the narrow face taper is adjusted during casting to maintain the heat flux density of the narrow face at 55%~85% of the heat flux density of the wide face; the secondary cooling intensity is controlled to ensure that the corner temperature of the billet is >900℃ in the straightening zone; the soaking furnace heating temperature is ≥1150℃, and the time in the furnace is ≥30min; in the vertical roll fixed-width side pressing pass of hot continuous rolling, the rolling force of the vertical roll mill is controlled to be >300kN. This invention significantly reduces the incidence of edge quality defects such as edge cracks, burrs, and broken edges in high-manganese and high-titanium series high-strength steel by optimizing the steel composition, continuous casting, and hot rolling processes.

This invention discloses a high-manganese steel production apparatus for improving the quality of high-manganese steel, belonging to the field of steel production technology. The apparatus includes a casting furnace and a casting pipe. A pipe seat that mates with the casting pipe is provided at the casting furnace. The casting pipe is inclined downwards at an angle f. In this high-manganese steel production apparatus, the casting pipe is inclined downwards at an angle of 12°, compared to the previous 15° angle. This shortens the distance between the steel stream and the narrow copper plate of the crystallizer, and places it higher up. The time for the stream to reach the meniscus is shortened, and the steel flow is increased. The stream exiting the nozzle experiences a smaller temperature drop as it flows upwards to the meniscus after hitting the narrow face. This maintains a higher superheat at the meniscus, which is beneficial for promoting the stability of the slag layer, uniform heat transfer, and improving the surface quality of the slab. It also reduces the probability of adhesion and longitudinal cracks.

This invention discloses a method for rapid preparation of a thin slab continuous casting machine, comprising: sequentially stacking consumable parts, steel plates, and shear plates and binding them with tape to form a consumable parts assembly; assembling iron sheets to form a cold material iron sheet assembly with the same dimensions as the wide face of the crystallizer; after the dummy bar is inserted into place, installing the entire consumable parts assembly on the head of the dummy bar, keeping it centered and tightening the bolts; after the consumable parts assembly is installed, placing asbestos strips on the two long sides of the consumable parts assembly and fixing them with tape; after fixing the asbestos strips, opening the crystallizer and pulling down the dummy bar, closing the crystallizer and clamping it to compact the asbestos strips between the wide face of the crystallizer and the consumable parts; after the asbestos strips are clamped and sealed, sealing the gap between the consumable parts and the narrow face of the crystallizer with asbestos, and stacking the combined cold material on top; after the cold material is placed on the narrow face of the crystallizer, sequentially stacking the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable parts, preparing for subsequent casting.