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,…
The prerequisite of the project shall have reliable energy supply (water, electricity, fuel) and land resources. Then the project owners must carefully plan the factory and set its capacity, raw material, products and process. SME specializes in the metallurgy industry, especially in the steel Turnkey or EPC project. We have…
The purity of the cast billet is mainly determined by the treatment process before the molten steel enters the mould. How can keep the billet with less inclusions? Currently there are a few methods ito use, such as the appropriate process of refining process, tundish metallurgy, protective pouring operations. The…
When we make a design of steel plant, firstly type of CCM shall give full consideration combining the product process, product quality and project economic aspects. When the CCM works with electric furnace or converter, some points must be considered carefully. Points to be considered Multi-furnace continuous casting In order…
Continuous casting process will turn steel liquid into billets, in CCM unit main process equipment or machines as following. Ladle support equipment In continuous casting, ladles are generally used to supply steel to the continuous caster. The equipment that transports the ladle to the top of the intermediate tank and…
The Source of Nitrogen Nitrogen in steel is mainly inhaled and dissolved in the exposed process of steel.Electric furnace steelmaking, including secondary refining arc heating, accelerates the dissociation of gas, so the content of nitrogen is high. Long smelting time in open hearth furnace increases nitrogen content. Improper control of…
