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Cold Rolled Mild Steel DC01 DC02 DC03 Carbon Steel Coil Electro Galvanized Steel Coils Best Quality Large Quantity Supply
cold rolled steel coil is made of hot-rolled coils as raw materials, which are rolled at room temperature below the recrystallization temperature, including plates and coils, which can be produced by many domestic steel plants such as Baosteel, Wuhan Iron and Steel, and Anshan Iron and Steel.
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cold rolled steel coil description
cold rolled steel coil is made of hot-rolled coils as raw materials, which are rolled at room temperature below the recrystallization temperature, including plates and coils, which can be produced by many domestic steel plants such as Baosteel, Wuhan Iron and Steel, and Anshan Iron and Steel. Among them, the one delivered in pieces is called steel plate, also called box plate or flat plate; the one that is very long and delivered in coils is called steel strip, also called coil.
cold rolled steel coil is rolling under recrystallization, but it is generally understood as rolling using normal temperature rolled materials. Aluminum cold rolling is divided into plate rolling and foil rolling. Those with a thickness of 0.15 to above are called plates, and those with a thickness of 0.15 to below are called foils. In Europe and America, 3~6 continuous rolling mills are mostly used as cold rolling equipment [1].
Raw material properties
cold rolled steel coil production is the finishing process of steel strip rolling. The raw material of cold rolled steel coil is hot rolled steel strip. To obtain high-quality cold rolled steel coil, there must be good hot-rolled steel strip raw materials to ensure. The control of the chemical composition, purity and hot rolling process of steel has a great influence on the structure and performance of the final cold rolled steel strip; the shape, shape and surface condition of the hot rolled steel strip will directly affect the cold rolling The dimensional accuracy, plate shape and surface quality of the steel coil.
Controlling the chemical composition of steel during steelmaking is the basis for ensuring the production of high-quality cold-rolled steel coils. The chemical composition of steel is closely related to the formability of the steel coil. The influence of the carbon content of the steel on the formability of the steel strip is realized by affecting the yield limit and the plastic strain ratio of the steel. Carbon is one of the most significant elements to increase the strength of steel. As the carbon content increases, the yield limit increases, the plastic strain ratio decreases, and the forming performance deteriorates [2].
Hot rolling influence
The structure and properties of hot-rolled steel strip directly affect the structure and properties of cold-rolled steel strip. The factors that affect the structure and properties of hot-rolled steel strips are: the heating temperature and heating time of the billet, the rolling temperature, the degree of final rolling deformation and the coiling temperature.
For low-carbon steel, the microstructure characteristics of hot rolling and cold rolling are ferrite grain structure and a certain amount of cementite, so the ferrite grain size, shape and uniformity of its microstructure characteristics are determined by cementite. The size and dispersion of the distribution determine the performance of the steel. The size of the ferrite grains of the steel plate after cold rolling is related to the heat treatment conditions of cold rolling and the microstructure of the hot rolled steel strip. The microstructure characteristics of the hot-rolled steel strip will remain on the cold-rolled steel strip, and the coarse grains, excessively fine grains and uneven grains obtained during the hot rolling deformation cannot be eliminated during cold rolling, which will be inherited to the cold rolled steel Bring it. These phenomena have been proved by production practice [2].
Features and uses
Cold-rolled steel has good properties, that is, cold-rolled steel strips and steel plates with thinner thickness and higher precision can be obtained through cold rolling, with high flatness, high surface finish, clean and bright surface of cold-rolled plates, and easy coating It has a wide range of processing, variety, and wide use. At the same time, it has the characteristics of high stamping performance, non-aging, and low yield point. Therefore, cold-rolled sheets have a wide range of uses, mainly used in automobiles, printed iron drums, construction, building materials, bicycles and other industries. It is also the best choice for the production of organic coated steel sheets
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Shandong Chengming Steel Co.,Ltd
Our company supplies cold/hot-rolled stainless steel sheets,stainless steel bars ,stainless steel coil stainless steel pipes,lead plate,bearing steel,spring steel,steel plate pile,tank plate,alloy steel plate,weather resistant steel plate and wear resistant plate to many steel factories from at home and abroad, including Shanxi Taigang Iron& Steel CO,.LTD (TISCO) Zhangjiagang Pohang (ZPSS), Shanghai Krupp, Ningbo Baoxin and steel factories in Taiwan area, Mainland Chinese and foreign countries and regions.
Our annual capacity is 25, 000 tons. The Annual Domestic Sale is 20 million, Annual Exported Sale about 12 million dollars.Our products supplied to more than 20 countries, such as Indonesia, Spain, Japan, Korea, Vietnam, Italy, Israel,Australia, Malaysia, Brazil, Pakistan, U. A. E, Peru, India etc. Good quality has been getting more and more prise from buyers at home and abroad.Our long-term business lines are 304 .202, 201 .430.409L, 304L, 316L, 309S and 310S, Finish: 2B ,BA ,NO.1 NO.4 ,HL, NO.8 and so on . For the sheets and coils,the thickness ranging from 0.3mm to 100mm.For the bars,the diameter ranging from 1mm to 300mm.For the pipes ,we have seamless pipe and weld pipe. Meanwhile, our company is also engaged in the long-term supply of homemade & imported medium and thick plates,galvanized or carbon
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Steel Sheet pile Description The steel sheet pile is a kind of steel structure with a linkage device on the edge, and this linkage device can be freely combined to form a continuous and compact steel structure with a retaining wall or a water retaining wall. The steel sheet pile is a type of steel with a lock. Its cross-sections are straight, trough and Z-shaped. There are various sizes and interlocking forms. The common ones are Larsonian, Lakwanaian and so on. Its advantages are: high strength, easy to penetrate hard soil; can be constructed in deep water, if necessary, add diagonal support to become a cage. It has good waterproof performance; it can be formed into cofferdams of various shapes as required and can be reused many times. Therefore, it has a wide range of uses. classification Steel sheet pile products are classified into cold-formed thin-walled steel sheet piles and hot-rolled steel sheet piles according to the production process. (1) There are two types of cold-formed steel sheet piles: non-bite type cold-formed steel sheet piles (also called channel plates) and bite type cold-formed steel sheet piles (divided into L-shaped, S-shaped, U-shaped, and Z-shaped) . Production process: Use thinner plates (commonly used thickness 8mm ~ 14mm) to be continuously rolled and formed in the cold bending unit. Advantages: less investment in the production line, lower production cost, flexible control of product size. Disadvantages: the thickness of each part of the pile body is the same, the section size cannot be optimized, which leads to an increase in steel consumption, the shape of the lock part is difficult to control, the joint is not tightly buckled, and the water cannot be stopped, and the pile body is easy to tear during use. (2) Hot-rolled steel sheet piles Hot-rolled steel sheet piles in the world mainly include U-shaped, Z-shaped, AS-shaped, H-shaped and dozens of specifications. The production, processing and installation processes of Z-type and AS-type steel sheet piles are relatively complicated, and are mainly used in Europe and America; U-type steel sheet piles are mainly used in China. Production process: It is formed by high temperature rolling by a section steel rolling mill. Advantages: standard size, superior performance, reasonable cross-section, high quality, and tight water barrier for the lock bite. Disadvantages: technical difficulty is relatively high, production cost is relatively high, specification series are not flexible. In engineering construction, the application range of cold-formed steel sheet piles is relatively narrow, and most of them are used as supplementary materials for applications. Hot-rolled steel sheet piles have always been the leading product for engineering applications. Based on the many advantages of steel sheet piles in construction operations, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standardization Management Committee issued the national standard for "Hot Rolled U-shaped Steel Sheet Pile" on May 14, 2007, and on December 1, 2007 Formally implemented. At the end of the 20th century, Maanshan Iron & Steel Co., Ltd. produced more than 5,000 tons of U-shaped steel sheet piles with a width of 400mm with the introduction of the universal rolling mill production line from abroad. The U-shaped steel sheet piles were successfully used in the cofferdam of Nenjiang Bridge and the 300,000 tons of Jingjiang New Century Shipyard. Ton shipyard and Bangladesh flood control projects. However, due to the low production efficiency, poor economic efficiency, low domestic demand and insufficient technical experience during the trial production period, continuous production was not possible. According to statistics, the annual consumption of steel sheet piles in my country remains at about 30,000 tons, accounting for only 1% of the world’s total, and it is limited to permanent projects such as the construction of some ports, wharves, and shipyards, as well as the construction of bridges, cofferdams, and foundation pit support Temporary works. The cold-formed steel sheet pile is continuously rolled and formed by the cold-formed unit, and the side lock can be continuously overlapped to form a steel structure of the sheet pile wall. The cold-formed steel sheet pile is made of thinner plates (commonly used thickness is 8mm-14mm) and processed by cold-formed forming units. The production cost is lower and the price is cheap, and the fixed-length control is more flexible. However, due to the simple processing method, the thickness of each part of the pile body is the same, the cross-sectional size cannot be optimized, which leads to an increase in steel consumption; the shape of the lock part is difficult to control, the joint is not tightly buckled, and the water cannot be stopped; limited by the capacity of cold bending processing equipment, It can produce low-strength ste
The steel sheet pile is a kind of steel structure with a linkage device on the edge, and this linkage device can be freely combined to form a continuous and compact steel structure with a retaining wall or a water retaining wall.
Stainless steel round steel belongs to the category of long products and bars. The so-called stainless steel round steel refers to a long product with a uniform circular cross section
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