In the history of cold-formed steel in China, it has been restricted by the low production of strip and strip. Due to the slow development of raw material shortage, with the great development of China's steel industry in recent years, the production of strips has also increased greatly. This is for deep processing, especially for cold-formed steel. It will be an excellent opportunity. With the accelerated development of China's steel industry and steel structure and other related industries, the demand for cold-formed steel is also growing. China's cold-formed steel is facing a new development climax.
Cold-formed steel is an economical section steel and an energy-efficient material. It is a new type of steel with strong vitality. It is widely used in various fields of the national economy. Its use can be roughly divided into highway guardrails, steel structures, automobiles, Containers, steel formwork and scaffolding, railway vehicles, ships and bridges, steel sheet piles, transmission towers, and other 10 categories. After a large amount of information collection and investigation and analysis, Ding Guoliang predicted that the current domestic demand for cold-formed steel is about 5.972 million tons, and will increase to 8.45 million tons during the 11th Five-Year Plan period. Among them, the current demand for highway guardrails is about 350,000 tons. It will continue to develop during the 11th Five-Year Plan period, with an increase of 380,000 tons. The demand for steel for steel structures will increase from the current 2 million tons to 2.5 million tons. Steel demand will continue to increase, from the current 700,000 tons to 1 million tons; container steel demand will increase from the current 1.5 million tons to 2 million tons; steel formwork and scaffolding due to the market is basically saturated, the demand is difficult to enlarge, Will continue to maintain 1.1 million tons; due to train speed, etc., the demand for railway automotive steel will also be enlarged, from the current 80,000 tons, will increase to 120,000 tons; ship bridge steel demand will increase from 130,000 tons to 150,000 tons, steel sheet piles China's current market has not yet been fully developed, currently only 10,000 tons of domestic production, and basically used for export. Steel sheet pile is a new type of economical steel, which has its unique advantages. It is widely used in water conservancy and civil construction in foreign countries. It is still a blank in China and needs to be developed. The “Eleventh Five-Year Plan” will focus on the development of the steel sheet pile market, predicting that the demand for steel sheet piles will reach 500,000 tons; the steel for transmission towers is currently only 2,000 tons domestically, most of the transmission towers are still using hot-rolled angle steel profiles, while cold-formed steel profiles are Due to its many advantages such as economy, anti-corrosion and various shapes, it has become an inevitable trend to replace the hot-rolled angle steel to construct a transmission tower. During the “Eleventh Five-Year Plan” period, the demand for this part of cold-formed steel will also reach 500,000 tons. In addition, there are other uses such as agricultural machinery, vegetable greenhouses, shelves, etc. The current domestic demand is about 100,000 tons, and will reach 200,000 tons during the 11th Five-Year Plan period. The current market demand for cold-formed steel is only 2% of current domestic steel production, and will reach 3.4% during the 11th Five-Year Plan period.
In recent years, users' understanding of cold-formed steel has been greatly improved. The shape of cold-formed steel can be very complicated. The production equipment and process are relatively simple. The one-time investment is small, the speed is fast, the organization is flexible, and the length, width and thickness can be selected arbitrarily. ;; not the first batch limit; product surface is smooth, high dimensional accuracy; the same cross-sectional shape and size performance, can save metal 15-50%, although the unit price is higher than hot-rolled profiles, but the engineering cost is still lower than the commonly used materials, these specialties With his strong vitality, cold-formed steel is bound to be welcomed by various industries and departments of the country. The large market that used hot-rolled steel was gradually replaced by cold-formed steel, which is an irresistible development trend.
The development of China's cold-formed steel industry also has problems such as unresolved institutional problems, more competition in market competition, less negative effects brought by less cooperation, insufficient market development, backward technical equipment, and unsupported units. These have restricted the healthy development of China's cold-formed steel industry. How to seize this opportunity to make the cold-formed steel industry healthier and more effective development is a question worth pondering. We must start planning from five aspects. First, we must vigorously develop the market of cold-formed steel according to China's national conditions; It is to develop a complete and advanced standard system for cold-formed steel; third, to improve the level of equipment technology and equipment; fourth, to improve the level of technical management; fifth, to guide the rationalization of the development of cold-formed steel in China.