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近年来,世界上工业比较发达的国家,都在大量兴建钢结构的高层建筑:厂房、办公室、大型体育馆和仓库以及停机厂、停车厂、大垮度桥梁。同时造船、运输车辆等部门,也都大量需要各种类型的金属结构型钢。由于工业部门的日益发展,技术的日益进步,对金属的钢结构现已向轻量、大型和扩大预制件的趋势发展。因此要求冶金机械工业部门能大量提供具有更经济断面的各种类型的型钢。而采用高频焊接法生产的结构型钢,就是属于一种宽边的经济断面型钢。
In recent years, most industrialized countries in the world have been building steel structures in high-rise buildings: factories, offices, large-scale gymnasiums and warehouses, as well as shut-down plants, parking facilities and bridges. At the same time shipbuilding, transport vehicles and other departments, also require a large number of various types of metal structural steel. Due to the increasing development of the industrial sector and the advancement of technology, the metal structure of steel has been developed towards the trend of light weight, large size and the expansion of prefabricated parts. Therefore, the metallurgical machinery industry is required to provide large quantities of various types of sections with more economical sections. The use of high-frequency welding method of structural steel, is a wide-brimmed section of the economy of steel.