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由热轧或冷轧钢板,钢带为坯料,经冷加工(冷轧或冷弯) 成型的冷弯薄壁型钢,是一种经济型材,它的生产和应用已有百来年历史,尤其是近三、四十年来,随着世界各国生产建设和科学技术的发展,一些工业发达国家如美、苏、法,德、日、奥等国,对此积累了大量经验,并促进了有关标准、规范的问世,推动了适用配套材料的出现,使冷弯型钢日益发展成为建筑行业中一种重要建筑型材。据有关资料估计,目前各国冷弯型钢年产量已超过1000万吨,规格品种亦已
Hot-rolled or cold-rolled steel plates, steel strips for blanks, and cold-formed thin-walled steels formed by cold working (cold or cold bending) are economical profiles. Its production and application has been a hundred years old, especially in recent years. In the past three or four decades, with the development of production and construction and science and technology in various countries of the world, some industrialized countries such as the United States, the Soviet Union, France, Germany, Japan, and Austria have accumulated a great deal of experience and promoted relevant standards. The advent of the specification has promoted the emergence of applicable supporting materials, and has made cold-formed steel an increasingly important building profile in the construction industry. According to relevant data, the current annual output of cold-formed steel has exceeded 10 million tons, and specifications have also been