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Galvanized steel plate related information
Jun 04, 2018

The development history

The United States in 1937 established the first continuous hot dip galvanized steel strip production line, built in 1942 in the United States the first continuous electricity galvanized strip steel production line, from entering the industrial production has more than 70 years of production history.

Hot-dip galvanized products are widely used in construction, household appliances, vehicles and ships, container manufacturing, electrical and mechanical industries, etc. In recent years, the world's demand for galvanized steel is increasing, and the output is growing rapidly. In the United States, Japan and other large steel production countries, hot galvanized steel has accounted for as much as 13-15% of the steel.

Recently, the automobile industry pays more and more attention to the service life of materials. In this case, corrosion - resistant and low - cost hot galvanized sheet began to be popular among automobile manufacturers.

The greatest advantage of coated steel plate is good corrosion resistance, paint coating, decoration and good formability. In recent years, the amount of coated steel plate in automobile has been on the rise and become the main body of automobile thin plate. All countries in the world are studying how to enlarge the types and specifications of coating plates, improve the plating process and improve the quality of coating, that is, corrosion resistance, anti-powder peeling, coating and welding. Coating sheet formability is always an important aspect of its, it mainly depends on substrate performance, coating process and performance and the conditions of forming process, through comprehensive match the advanced technology to achieve a good application effect.

The production status

The development of hot-dip galvanizing in China has been lagging behind. In the 1950 s and '60 s built 13 sheet steel hot galvanizing unit flux method, capacity of 100000 t/a, but because of low yield, high cost, poor quality, environmental pollution, poor economic benefits defects have been stopped, and production. Only in the late 1970s did China begin to build large-scale wideband hot-dip galvanizing units.

Hot-dip galvanized strip steel has been in short supply in our market. Every year since the mid-1990s, between 800,000 and 1 million tons have been imported from abroad. With the development of domestic economy, especially the development of automobile, household appliances and construction industry, the demand for galvanized strip steel has also increased greatly. In recent 20 years has built a batch of annual production capacity of 100000 tons production line, but from the process flow, equipment composition to the varieties of products belong to a low level of the traditional technology of hot galvanizing units, on the varieties of quality quantity cannot meet the demand of the development of economy in China, still need to build new hot galvanizing line to meet the needs of the market.

Since the 1990s, the production of galvanized steel plate in China has made great progress, and the processing capacity of galvanized steel plate in China has reached nearly 3 million t. The market share of domestic galvanized sheets increased rapidly, from about 27 percent in 1996 to about 59 percent in 1998. The main domestic manufacturers for baosteel, wuhan steel, pansteel, hangang, bensteel and other five enterprises have a total production capacity of more than 1.3 million tons.

The main difference between the existing hot-dip galvanizing units in China and foreign countries is that most of them have no pre-cleaning equipment, which is difficult to guarantee the surface quality of galvanized. The existing finishing machines are simple two-roll finishing machines (panzhihua is a four-roll machine), which cannot improve the mechanical properties of strip steel, especially the deep impact performance. Existing varieties are single galvanized sheet, only a small amount of alloying board, far from meeting the market needs.

The hot-dip galvanized steel plate produced by our factory is mainly used in building materials, light industry, agriculture, transportation and other industries. Due to the limitations of the existing equipment conditions, technology and properties of the original galvanized sheet, few galvanized sheets can be used in automobile manufacturing.

Features of galvanized steel: galvanized steel can effectively prevent corrosion, prolong service life. Galvanized steel sheet (thickness: 0.4-1.2mm) is also called galvanized iron sheet, commonly known as galvanized iron sheet. Galvanized steel plate is widely used in construction, vehicles, household appliances, daily necessities and other industries.