Three Rolling process schedules refer to deformation system, rolling speed system and rolling temperature system. 1.Deformation system Under certain rolling conditions, the deforming course from materials to final products is called transformation system, its main content is to define total deflection and pass deflection. Distribution of the deflection is a…
After refining and blowing outside the furnace, the composition of the steel in any position in the ladle is uniform. And after solidification, chemical compositions of continuous casting billet from center to surface isn*t same, even some of the differences are very large. This non-uniformity of the composition is called…
With advanced communication and internet technology, the intelligence level of steel mills has been greatly improved, and more automation functions such as online automatic tracking and monitoring, loading, cutting, sampling,stacking have been realized, that reduces workers’ labor intensity, significantly improves plant efficiency and products get good consistency. Automation coding machine…
There are two casting processes in production of steel ingot or steel billet, die casting and continuous casting process. There are their typical merits and shortcomings, though the continuous casting process acts an important role, but the die casting process can’t be replaced. The die casting process is one batch…
Hydrogen energy is regarded as the most promising clean energy in the 21st century, with the advantages of diverse sources, clean and low-carbon, flexible and efficient, and rich application scenarios. The current hydrogen metallurgy process mainly includes blast furnace hydrogen-rich smelting and direct hydrogen reduction. The main purpose of blast…
Classification of the residual elements Residual elements in steel are divided into three categories according to their oxidation potential, fully reserved elements, partial reserved elements and minimal reserved elements. The oxidation potential of the fully reserved elements Cu,Ni,Co,As,W,Mo,Sn,Sb is lower than iron, does not participate in the oxidation reaction during…
The high speed wire rod rolling mill process is flexible, complete control means, can produce a wide range variety of high-quality wire rods. Twist-free finishing mill units both in production efficiency and product quality are greatly superior to the open-train mill, even in the lower speed range, its performance is…
Rough rolling will make the billet compressed or stretched, and delivers qualified work pieces with the right section shape, qualified size and good surface. Generally the section size of rolled pieces after rough rolling process is more than or equal 50mm. The rough rolling process is different because there are…
Phosphorus element is generally expressed as [P]. Phosphorus’s influences to steel properties To deteriorate the welding properties of steel. To reduce the plasticity and toughness of steel, thus steel is cold brittleness, that is, the impact toughness of steel at low temperatures is significantly reduced. To make steel easily processed…
At early stage of bar production line, open-train mill is main equipment but people discover its inadequacy and limitations. In order to reach more high yield with lower cost, factories optimize rolling process and improve performance of equipment and process. In result, the semi-continuous rolling mill replaces the open-train mill,…