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一、前言随着工业技术的进步,各种焊接建筑物越来越向大型化、轻量化发展,因此日本一直在大力开发焊接结构高强度钢,690兆帕级高强度钢已在各个领域广泛采用,785兆帕级钢也已用于高压水管、大跨度桥梁、压力容器和建筑机械等。本文综述了日本几个主要钢铁企业研究785兆帕级(80公斤级)焊接结构高强度钢的情况,以及这些钢的性能、
I. Introduction With the advancement of industrial technology, all kinds of welded buildings are becoming more and more large-scale and lightweight. Therefore, Japan has been vigorously developing high-strength welded structural steel, and the 690 MPa high-strength steel has been widely used in various fields Adopted, 785 MPa class steels have also been used for high pressure pipes, long span bridges, pressure vessels and construction machinery. This paper presents an overview of several major Japanese steel mills in the study of 785 MPa (80 kg) high strength welded structural steel, as well as the performance of these steels,