Ordinal decoupling design of the complex coupling model for a wide strip tandem cold mill;

Speed up expanding the production capacity of cold rolled wide strip;

The direct rolling technology for conventional hot wide strip mill used in Europe and America;

Through an analysis of chemical compositions,mechanical properties,metallographic structures,inclusions of Q345B wide strip steel,it was found that original cracks exist in casting blank and that while rolling,a great amount of inclusions and too high content of manganese lead to the further expansion of them,ultimately to form burst edges.

The edge crack on Q345B wide strip steel was analyzed by means of chemical composition analysis,mechanical property testing,micro metallographical examination.

This anticle analyzes edge crack on Q345B wide strip steel of chemical composition,me- chanical property,metallographical organization,metallic inclusion and find to he due to cast steel existing original flaw ,while rolling,great amount metallic inclusion and overtop Manganese con- tents to lead to flaw further expand,ultimate to form burst edg

Technical Analysis for Wide Flat Steel Hot Continuous Mill;

It has outstripped the design capability to roll 865mm wide flat steel on 950 hot tandem mill,causing some problems such as strip running off,spread rolling,back-up roll flaking and difficult control to strip shape etc.

The varieties and gauges,processing characteristics and the equipment performance of the medium-width strip mill of Lingyuan Iron and Steel Group Cowere introducedThe advantages and existing problems of this mill were pointed out,and its reformation schemes were introduced too