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high productivity slab casting of peritectic steel grades

High productivity slab casting of peritectic steel grades

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第八届全国连铸学术会议

作者： J. Watzinger A. Harvey A. Flick Siemens VAI Metals Technologies GmbH ＆ Co Turmstrasse 44 P.O Box 4 A-4031 Linz/Austria Siemens VAI Metals Technologies GmbH ＆ Co Turmstrasse 44 P.O Box 4 A-4031 Linz/Austria Siemens VAI Metals Technologies GmbH ＆ Co Turmstrasse 44 P.O Box 4 A-4031 Linz/Austria

＜正＞In the second half of 2004 NANJING Iron ＆ Steel Co.（NISCO）started up a new plate production facility based on converter steel making,wide slab casting,walking beam furnace and rolling by a combined plate/Steckel mill. The concept challenges the caster to produce 150 mm thick slabs up to 3.250 m wide at a high quality level, which are direct charged into the reheat *** variety of steel grades is demanding including pipe grades X65 and X80. In particular the sensitive peritectic steel grades at large slab width showed the most difficulties in regard to surface *** features together with casting technologies and liquid steel quality that have contributed to the successful production of defect-free slabs will be *** influence of cast parameters on slab quality at stable high steel throughput up to 5.5 tons per minute will be systematically shown gathered from several test cast sequences of peritectic steel in the range of 0.10 to 0.14% carbon including micro-alloying elements.

关键词： peritectic steel high speed casting

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CEM? Process: the Most Efficient Process for Thin Gauge Products

CEM? Process: the Most Efficient Process for Thin Gauge Prod...

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第十一届中国钢铁年会

作者： KO Young-ju CHO Myung-jong CHUNG Jae-sook HWANG Jong-yeon Global POIST Project Department CEM Project POSCO

POSCO has developed CEM(Compact Endless casting and rolling Mill) process, which is based on high casting speed with 6 m/min and endless rolling from mold meniscus to down coiler. Mechanical design improvement and high speed technology development have been achieved through various efforts such as the molten flow control in the mold, water cooling in the caster and the mold level hunting control. For stable change of coil thickness and width during endless rolling, the control software of casting and rolling have been reinforced continuously against a lot of abnormal situation. Owing to the stable endless rolling technology, the production ratio of thin gauge HR coils was increased significantly to 70% but, on the contrary, the cobble ratio in the rolling region was greatly decreased. Because the temperature and the speed of the strip are constant during endless rolling in finishing mill region, and it makes easy to control the strip temperature to produce AHSS in the run out table.

关键词： CEM? high speed casting endless rolling thin gauge advanced high strength steel

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Latest Improvements In Slab Caster Technology

Latest Improvements In Slab Caster Technology

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第十七届（2013年）全国炼钢学术会议

作者： ADANI Pierluigi WAKELEY Keith ELLIS Ian Danieli Davy Distington

＜正＞This paper highlights the latest advances / improvements in equipment design, process technology and control software for thin,medium and "conventional" thickness slab *** Davy Distington（DDD） has supplied many such machines to high quality steel manufacturers such as *** have also supplied new high speed casting machines with speeds at 8.0m/min which have required new levels of automation control for systems such as mould level,oscillation,secondary cooling and soft reduction *** high speeds have also resulted in accelerated component *** experience gained during these installations has resulted in the development of the "3Q" technological packages and Human Computer Interface（HO） that can be supplied independently and retrospectively to meet the ever increasing demand for production and slab *** addition,the reliability and stability of many critical components have been modified and improved to meet the demanding conditions of high speed *** applying these changes to more conventional casting speeds,the improvements have been quite *** "3Q" suite of technological packages addresses three key principles of Quality,Quantity and Quickness, delivering the highest product quality in the required quantity with the quickness of response required for online control systems.

关键词： Slab Casters process technology high speed casting automation

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