Galvanized steel sheet profiles and production status
Surface hot dip galvanized or zinc plating welding steel plate steel plate, hot-dip galvanized products are widely used in construction, home appliances, transport, container manufacturing, mechanical and electrical industries. Development history 1937 United States established the first continuous hot-dip zinc Strip steel production lines, in 1942 in the United States has its first continuous galvanized Strip steel production line, from entering industrial production has been more than 70 years of production history. Hot dip galvanized products are widely used in construction, home appliances, transport, container manufacturing, mechanical and electrical industries, involved in virtually all areas of life. In recent years, the increasing world demand for galvanized steel plate, production increased quickly in the United States, Japan and other steel producing countries, the proportion of hot-galvanized steel is 13%-15%.
Recently, the car industry more and more importance to the life of the material, coating corrosion resistance of cold-rolled steel sheet has been unable to meet requirements. In this case, corrosion resistance and low cost hot galvanized plate had generally favored by the automobile manufacturers. Coating steel plate's biggest advantage is an excellent corrosion resistance, paint, decoration and good formability. Coating and in recent years there has been an upward trend in the use of steel in automobiles, and become the subject of automobile sheet. Countries around the world are considering how to expand the varieties, specifications of the coating plate, improvement of coating process and coating, the corrosion resistance, resistance to chalking stripping, painting, welding. Coated steel sheet formability is always an important aspect of its application, it depends on substrate properties and forming technology, coating technology and performance conditions, through integrated advanced technologies in order to achieve good results. Production status
Development of hot-dip galvanizing production in China has been lagging. In the 1950 of the 20th century to 60 were built the 13 single-flux method of hot galvanizing plate, capacity of 100,000 t/a, but due to the low yield and high cost, poor quality, environmental pollution, poor economic returns have been stopped, converting. In the late 1970 of the 20th century, China began to build large broadband hot galvanizing. Hot-dip galvanized steel has always been in short supply in the Chinese market. Since in the mid 1990 of the 20th century, are imported from abroad about 801 million t per year. With the development of the domestic economy, especially the development of automobiles, home appliances and construction, has greatly increased demand for galvanized steel. In the past 20 years has built a number of annual output of over 100,000 t line, but in the process flow and equipment on the product are low levels of traditional technology of hot galvanizing, in variety and quality in quantity can not meet the demand of China's economic development still needs to build a new hot galvanizing line to meet market needs. In the 1990 of the 20th century galvanized steel sheet production in China has since developed, and has been under construction galvanized steel processing capacity of nearly 3 million t. In recent years, the market share of domestic galvanized steel soon, in 1996 to about 27% in 1998 to 59%. Major domestic manufacturers for Baosteel, Wuhan iron and steel, panzhihua steel, Handan iron and steel, 5 companies such as steel production capacity has exceeded the sum of 1.3 million tons. China existing of hot plating zinc unit and abroad advanced level exists of main gap is most unit no pre cleaning equipment, on plating zinc surface to guarantee; existing light machine are is compared simple of two roll light machine (panzhihua iron and for four roll), cannot better to improved strip of mechanical performance, especially deep rushed performance; existing varieties are is single of plating zinc Board, only has few of alloy of Board, far cannot meet market need. Manufacturers in China are hot-dip galvanized steel in building materials, light industry, agriculture, transportation and other industries as the main user. Due to the existing hot dip galvanizing equipment, process technology and the properties of limits, the actual production of galvanized sheet for the automotive industry to use rarely.
Galvanized steel characteristics: galvanized can effectively prevent steel corrosion and prolong service life. Galvanized steel sheet (thickness of 0.4~1.2mm), also known as galvanized iron, commonly known as Tin. Galvanized steel is widely used in buildings, vehicles, home appliances, daily necessities and other industries.
Source: http://tj.zzsteel.net/
