The Development Of The New Type Of Hot Rolling Hole System With Toothed Channel Steel

The new type of to toothed channel steel studied in this paper belongs to the C-type steel in view of the section shape.Judging from its function,it is a pre-embedded channel steel used in the construction industry.At present,the production methods of similar pre-embedded channel steel are mostly cold-formed.However,compared with cold-formed steel,The internal stress of the steel produced by hot rolling was small,And the stability and mechanical properties of the steel were good.Therefore the new type of toothed channel steel in this paper was produced by hot rolling.this type of steel is widely used in embedded structures in subway tunnels.With the construction of a large number of high-speed railways in China in recent years,this new type of pre-embedded parts with toothed channels will have a broad market prospect.In this paper,based on the understanding of the domestic and foreign research status of the slotted embedded parts,and summarizing the shortcomings of this type of steel hole design in the early stage,designs a set of well-typed hole type systems.And the rigid plastic finite element software DEFORM-3D was used to simulate the designed hole shape.To solve the problem of uneven tooth height along the tooth width in the tooth profile of the rolling piece;and the problem of the residual shoulder filling and local defects of waist and leg.On the basis of reasonable design of the hole type system,the law of elongation rate,rolling force,temperature field variation of the rolling piece and metal flow velocity field in the deformation zone of the hole were summarized and analyzed.After the hole-type system has been designed,the most important special hole type(K11~K1)was selected for the experimental study.After the adjustment of the rolling mill,a qualified rolling sample was rolled out,which could be applied for hole type to The future actual production At the same time,In this paper the research on the new hot-rolled hole system with slot-grilled steel also fills the status quo of insufficient research on hot-rolled C-shaped steel in China.