Packaging steel strip manufacturers: cold-rolled sheet production features good performance, multiple varieties and wide applications

Packaging steel strip manufacturers: cold-rolled sheet production features good performance, multiple varieties and wide applications
　　 has good performance, many varieties and wide applications. Another outstanding advantage of cold-rolled steel plate is good performance, variety and wide application. By properly matching the degree of cold rolling deformation and the heat treatment after cold rolling, the requirements of users can be met in a relatively wide range. For example, almost all of the automotive sheet must be stamped and formed, so the deep-drawing performance has become the core issue in the production and use of the sheet. One of the main requirements of stamping steel is to have a dominant favorable texture. The plastic strain ratio r of the hot-rolled sheet can only reach 0.8—0.95 today, while the r of the cold-rolled first-generation rimmed steel automobile sheet is 1.0—1.2, the second-generation 08Al steel r is 1.4—1.8, and the third-generation cold-rolled automobile The r of the plate is 1.8-2.8, which cannot be achieved by hot rolling.
　　Silicon steel is one of the important materials in the electromechanical industry, and the main users are the motor manufacturing industry and the power transmission equipment manufacturing industry. Rising energy prices and the energy crisis inevitably require the use of low-energy-consumption materials, so hot-rolled silicon steel sheets with high energy consumption began to be eliminated in the 1960s and replaced by cold-rolled silicon steel sheets. Using 100,000 tons of cold-rolled non-oriented silicon steel to manufacture a motor can save 198 million kW·h/a in actual measurement compared with 100,000 tons of hot-rolled Guigang. The motor running for 10 years is equivalent to saving a 200,000 kW power plant for the whole year. Power generation. Moreover, the total weight of the 360,000 kV·A transformer produced by Lengzhagui steel sheet is 204t, and the weight of a 120,000 kV·A transformer made of hot-rolled silicon steel sheet is 200t. Therefore, cold-rolled silicon steel sheet is used instead Hot-rolled silicon steel sheet has significant economic benefits. Cold rolling can also produce stainless steel plates, which are used in furniture and building decoration, chemical industry, etc. In recent years, there has been a great development of surface treatment steel plates. There are many kinds of coated steel plates with cold-rolled plates as substrates, and their applications are extremely wide.
　　 Due to the above reasons, the production of cold-rolled sheet has been rapidly developed. In terms of output, the output of general cold-rolled plates accounts for about 20% of the total output of rolled products, and the technological equipment is constantly innovated. The rolling speed of the early cold-rolled sheet was less than 1m/s, and now it has reached 41.6 m/s. The width of the steel plate was 406mm in 1905, 914mm in 1925, and now it is as wide as 2337mm. The weight of the steel coil has also grown from a few tons to 60t. The annual output of a modern cold rolling mill can reach 2.5 million tons.