What is high quality steel products
Article:    Author:    View:67     Time:2022-05-12

  Steel can be seen everywhere in our daily life. What is steel? How are high quality steel products produced?What does it do? What type of steel is there? Next, I will take you to play with high quality steel products, understand high quality steel products and enter the field of steel.
1.What is high quality steel products? 
  Simply put, steel is an iron-carbon alloy with a carbon content of more than 0.025% and less than 2.11%. High quality steel products is a material of a certain shape, size and performance made of steel ingots, billets or steel through pressure processing. Most steel processing is through pressure processing, which plastically deforms the processed steel (bill, ingot, etc.). According to the different processing temperature of steel, it can be divided into cold working and hot working. The chemical composition of high quality steel products can vary greatly, and steel containing a small amount of manganese, phosphorus, silicon, sulfur and other elements, and carbon content less than 1.7% is called carbon steel ; In actual prosuction,high quality steel products often contain different alloying elements, such as manganese, nickel, vanadium, etc., The application and research of steel has a long history, but until the invention of the Bainite steelmaking method in the 19th century, the production of steel was a high-cost and low-efficiency work. Today, steel is one of the most used materials in the world due to its low price and reliable performance. It is an indispensable component in the construction industry, manufacturing industry and people's daily life. It can be said that steel is the material basis of modern society.
2.How is high quality steel products produced?
A general process of steel production is as follows:
(1)Iron making

Iron making

(2)Steelmaking



(3)Continuous casting (or die casting)

Continuous casting

(4)Hot rolling (out of hot rolled high quality steel products)
Hot rolling

The main purpose of the steelmaking process is to mix the blast furnace molten iron with an appropriate amount of scrap steel in the steelmaking furnace through oxidation, decarburization and slagging processes to reduce harmful elements and smelt molten steel that meets the requirements. At present, there are three main steelmaking methods, namely open hearth steelmaking, converter steelmaking and electric furnace steelmaking. Among them, oxygen top-blown converter and electric furnace steelmaking have developed rapidly. Especially the pure oxygen top-blown converter steelmaking method has been widely used due to its advantages in productivity, product quality, cost and so on. This steelmaking process mainly includes three processes: raw material pretreatment process, blowing process, ingot casting or continuous casting process.
3.What is the role of steel?
There are many types of steel, and each high quality steel products has its own unique role. For example: medium and heavy plate high quality steel products is mainly used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridge construction, etc. It is mostly used to manufacture various vessels (especially pressure vessels), furnace shells and bridge structures of boilers, as well as automobile girder structures, structures for river and sea transportation, as well as automobile girder structures, ship hulls for river and sea transportation, and certain mechanical parts. Assembled and welded into large components, etc.; 4340 high quality steel products is used as important quenched and tempered parts that require good toughness, high strength, and large size, such as heavy machinery and high-load shafts, turbine shafts with a diameter greater than 250mm, helicopter rotor shafts, turbine shafts Jet engine turbine shafts, blades, high-load transmission parts, crankshaft fasteners. Gears, etc.; can also be used for rotor shafts and blades, etc., where the operating temperature exceeds 400 °C.
4.What type of high quality steel products is there?
(1) According to chemical composition: It is consistent with the chemical composition of crude steel, and two kinds of adjustments are made to ordinary steel (including ordinary carbon steel and low-alloy steel) and high-quality steel (including alloy steel, other high-quality steel, and high-alloy steel). For non-alloy steel, low alloy steel, alloy steel (excluding stainless steel), stainless steel four.
(2) According to the processing technology: from hot-rolled steel, cold-processed steel, forged steel, extruded and hydraulic steel, to hot-rolled steel, cold-rolled (drawn) steel, coated steel, forged and spinning steel, Five other processing technology steels, highlighting the cold rolling and coating processing technology.
(3)According to the variety: The steel varieties are refined from 18 large varieties to 22 large varieties, the classification of profiles has been adjusted, and the classification of plates and strips has been refined. The main adjustment situation is: the 4 varieties of ordinary large, ordinary medium, ordinary small, and high-quality section steel in the profiles are adjusted to 4 varieties of large section steel, medium and small section steel, bar, and steel bar, and the extra-thick plate, medium-thickness section in the plate and strip. The 4 varieties of plate, sheet and strip are adjusted to extra-thick plate, thick plate, medium plate, hot-rolled sheet, cold-rolled sheet, medium-thick and wide steel strip, hot-rolled thin and wide steel strip, cold-rolled thin and wide steel strip, coating There are 12 varieties of strips, coated strips, hot-rolled narrow steel strips, and cold-rolled narrow steel strips, three varieties of cold-formed steel, coiled steel parts, and forged steel parts are merged into other steels, and one variety of steel balls is cancelled.
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