Our company has been engaged in steel industry for more than 10 years.Full of experience and strong business relations with our customers and factories. And our products include galvanized steel sheet,Patterned galvanized steel plate ,angle steel, galvanized steel coil, galvanized square pipe, galvanized angel bar,galvanized channel steel,Alloy plate,high-pressure vessel plate ,galvanized steel pipe and hardox wear resistant steel plate.
The main task of steelmaking is to adjust the content of carbon and alloying elements in the steel to within the specified range according to the quality requirements of the steel being made, and to reduce the content of impurities such as P, S, H, O, and N to the allowable Under the limit. The steelmaking process is essentially an oxidation process. The excess carbon in the charge is oxidized and burned into CO gas to escape, and other Si, P, Mn and other components are oxidized and enter the slag. Part of S enters the smelting slag, and part of it generates SO2 and is discharged. When the composition and temperature of the molten steel reach the required process, the steel can be tapped. But in order to remove excess oxygen in steel and adjust its overall chemical composition, deoxidizers and iron alloys or alloy elements can be added.
After a series of treatments, such as desulfurization and slag blocking, the delivered molten iron can be poured into the converter as the main charge. In addition, less than 10% of scrap steel will be added. Then, oxygen is blown into the converter to burn, the excess carbon in the molten iron will be oxidized and a large amount of heat will be released. When the probe measures the low carbon content we predetermined, it will stop blowing oxygen and tap steel. Generally, operations such as deoxidation and composition adjustment are required in the ladle; then the carbonized rice husk is thrown on the surface of the molten steel to prevent the molten steel from being oxidized again, and it can be sent to the continuous casting or die casting area. For some steel grades with higher requirements, you can increase bottom argon blowing, RH vacuum treatment, powder spraying (spraying SI-CA powder and modified lime), which can effectively reduce the gas and inclusion content in the steel, and further reduce The role of carbon and sulfur reduction. After these refining measures outside the furnace, the composition can be finally fine-tuned to meet our demand for high-quality steel.
The main processing methods of steel：
Rolling: The metal blank is passed through the gap between a pair of rotating rolls (it can be of various shapes according to requirements). Due to the compression of the rolls, the cross-section of the material is reduced and the length is increased. This is also the most commonly used production for steel production. Method, mainly used to produce profiles, plates and pipes. Divided into cold rolling and hot rolling.
Forging: A pressure processing method that uses the reciprocating impact of a forging hammer or the pressure of a press to change the blank into the shape and size we need. Generally divided into free forging and die forging, it is often used to produce some large materials, billets and other materials with relatively large cross-sectional dimensions.
Drawing: It is a processing method in which rolled metal blanks (forms, tubes, products, etc.) are drawn through a die hole to reduce the cross section and increase the length. This method is mostly used for cold working.
Extrusion: It is a processing method in which metal is placed in a closed extrusion cylinder and one end is applied pressure to extrude the metal from a prescribed die hole to obtain a finished product with the same shape and size. This type of production method is mostly used to produce non-ferrous metals metallic material.
Production sawing is used to cut carbon, stainless, and aluminum long products to custom lengths. Sawing tolerances are typically +/- 1/16”, with variations possible for different products and finished length.