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Carbon steel double-roller thin-belt continuous metal cast process

A twin-roll thin strip continuous casting and carbon steel technology, applied in metal rolling and other directions, can solve the problem of limited effect of heat flow density, and achieve the effects of improving productivity, improving heat transfer and reducing production costs

Active Publication Date: 2009-03-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is limited to the effect of improving the heat flux density, because the melting point of manganese oxide and silicon dioxide mixed oxide cannot be very low, and the thickness of the oxide film formed on the surface of the crystallization roller is also thin, which is harmful to the surface of the crystallization roller. Increased cleaning requirements

Method used

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  • Carbon steel double-roller thin-belt continuous metal cast process
  • Carbon steel double-roller thin-belt continuous metal cast process
  • Carbon steel double-roller thin-belt continuous metal cast process

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Adding titanium 0.04% Ti to the ordinary carbon steel composition, in the argon or argon-hydrogen mixed gas, the composition of the crystallization roller surface deposit is a mixed oxide of silicon oxide, manganese oxide and titanium oxide, and the morphology of the oxide See Figure 4 . When the gas is argon, the oxygen partial pressure is 10 -2 ~10 -4 Within the range, the average heat flux at this time is 8MW / m 2 , when the gas is Ar-10%H 2 , the partial pressure of oxygen can reach 10 -22 atm, the average heat flux reaches 12MW / m 2 .

Embodiment 2

[0047] Adding titanium 0.1% Ti to the ordinary carbon steel composition, in the argon or argon-hydrogen mixed gas, the composition of the deposit on the surface of the crystallization roller is a mixed oxide of silicon oxide, manganese oxide and titanium oxide, when the gas is argon , when the oxygen partial pressure is 10 -2 ~10 -4 Within the range, the average heat flux at this time is 10MW / m 2 , when the gas is Ar-5%H 2 , the partial pressure of oxygen can reach 10 -14 atm, the average heat flux reaches 14MW / m 2 .

[0048] The heat flux is increased, and for the same process parameters of the same steel grade, the heat transfer coefficient is increased, the heat transfer coefficient is increased, and the casting speed can be increased, thus improving the productivity.

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Abstract

The invention discloses a carbon steel double-roller bond continuous metal cast process, which comprises the following steps: a, smelting and adding the titanium in the carbon steel in the smelting process; b, proceeding with the bond continuous metal cast, making the steel smelt entering the air-tight fused bath which is formed by the crystallization roller by ladle, bakie, immersion inlet, forming the casting band by cooling with the crystallization roller and rolling slightly, forming the deposit film(the component is the mixture of SiO2, manganese oxide, and titanium oxide), and leading in the mixture of inactive gas and reducing gas; c, rolling hotly, controlling the cooling and batching. The invention improves the heat diffusion between the casting band and the crystallization roller and the production efficiency, which has the lubricating function, reduces the frictional force between the casting band and the crystallization roller, and improves the surface quality of the casting band.

Description

technical field [0001] The invention relates to the field of thin strip continuous casting technology, in particular to a carbon steel twin-roll thin strip continuous casting method. Background technique [0002] One of the main forms of thin strip continuous casting is that molten steel passes through high-speed rotating crystallization rolls, and is solidified into a 2-5mm cast strip under the action of rolling force. At present, the basic technological process of thin strip continuous casting production is: thin strip continuous casting machine (twin roll, single roll, wheel belt type) - airtight chamber - looper - pinch roll - hot rolling (single stand or two stand or no ) - controlled cooling - coiling. The molten steel enters the molten pool formed by the rotating water-cooled crystallization roller and side sealing plate from the ladle through the long nozzle, tundish and submerged nozzle, and is cooled by the water-cooled crystallization roller to form a casting bel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14B21B1/46B22D11/14
Inventor 于艳崔健方园叶长宏卢志明
Owner BAOSHAN IRON & STEEL CO LTD
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