By using the matured rolling procedure of hot coiling box in traditional production line of hot rolled strip in order to obtain the endless rolling after butt welding on intermediate slab the stability on sheet strip rolling and the dimension accuracy on the head and tail of the strip can be improved.
By statistics and analysis of heating time,size,rolling specification,black mark temperature difference and thickness acouracy difference,this paper found out the effects of billet width on intermediate billet black mark temperature difference,and found out the relationships between goal thickness and finished product thickness accuracy,as well as goal thickness and unqualified rate.
The rolling technology and equipment for typical product, the stock (150×800×9500mm) being rolled to intermediate plate (22×800×lmm) by two-roll mill and finished plate (3.0×800×Lmm) by four-roll mills, were analysised in this paper.
In order to reduce production cost, the best production process using niobium microalloy instead of vanadium to produce Q345B plates of different thickness is discussed through analyzing the reason of forming Widmannstaetten structure and the influences of slab thickness, the reduction in pass, low temperature rolling and control cooling etc on the grain size and the properties.
The targets of this project are, via building the prediction model of silicon steel slab's stress field, to analyze temperature field and stress field under various technical process and the mechanism of fissure occurring to get the best technical parameters and establish model and the analysis platform of the relationship between silicon steel fissure and all kinds of technical parameters.
To exclude sampling errors due to missed lesions at the slab limits after cutting off the overlap, we reviewed the complete middle slab separately.
例句来源
Threc main techniques to reduce heat loss from intermediate stocks during strip steel hot rolling process were introduced, namely, coil box, thermal isolating panel and intermediate stand. It would be the reference to new building and revamping of hot strip mills.
This paper dealt with the latest endless rolling technique of hot strip mill.By using the matured rolling procedure of hot coiling box in traditional production line of hot rolled strip in order to obtain the endless rolling after butt welding on intermediate slab the stability on sheet strip rolling and the dimension accuracy on the head and tail of the strip can be improved. The technique will be the new trend of development on traditional production of hot rolled strip.
The endless rolling technology of hot strip rolling mill is introduced. The mature hot coiling- box rolling technology is employed on the traditional hot strip production line and endless rolling is achieved after butt welding the heads and tails of semifinished products of hot rolled strips. The stability of thin strip rolling is improved and dimension precision of the strip heads and tails is enhanced. This technology is the new developing tendency or hot strip production technology.