The Chinese nation is the world's first steelmaking country, our ancestors three thousand years ago had mastered some iron smelting, steelmaking, casting and forging and heat treatment technology, to 1700 years earlier than Europe, made an important contribution to world civilization and human progress.
Iron and steel has become the most basic and important material for modern industrial and agricultural production, transportation, national defense and even people's lives. At present, although a variety of new inorganic materials and organic synthetic materials have been greatly developed. But from the point of view of production cost and extensive applicability, they are far from replacing iron and steel. Therefore, the production capacity of iron and steel is still one of the important symbols to measure a country's national strength. Steel materials are so widely used for iron ore deposits, large storage capacity, mining, smelting iron and steel more economical, semi-finished products of cold and hot deformation ability. The finished products have excellent mechanical properties (strength, plasticity and impact resistance) and processability (cutting, welding, cold deformation, etc.). But compared with silicate materials, polymer materials and some nonferrous metals, the biggest drawback is that it is in the atmosphere or of acid and alkali, salt and other medium conditions, easy weight loss due to corrosion loss, and even completely destroyed.
Enterprise public no
