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一、前言本文讨论了用3种试验成分所获得的高强度耐候钢的原始结果。试验用钢化学成分的主要特点是采用了较普通耐候钢要高的含铜量(1.3％)。这种钢除了能改善耐腐蚀性能外,还可获得显著的沉淀强化。在这些试验钢种中,除含铜量高外,为使轧制和时效工艺具有更大的灵活性,采用了添加铌、钛两两种微量元素的做法,要比添加单一微量元素获得的强度水平高得多。本研究的另一个目的是,试图在新研制的含铜钢中,用成本较低的硅代替成本较高的镍元素。近年来研制的一些用于北方高寒
I. INTRODUCTION This paper discusses the original results of high-strength weathering steels obtained with three test compositions. The main characteristic of the chemical composition of the test steel is the use of higher copper content (1.3%) than normal weathering steels. In addition to improving the corrosion resistance of this steel, a significant precipitation hardening is also achieved. In addition to the high content of copper, the addition of niobium and titanium in the test steels for both rolling and aging processes was more effective than the addition of a single trace element The intensity level is much higher. Another objective of this study was to attempt to replace the more costly nickel with lower cost silicon in newly developed copper-containing steels. Some developed in recent years for the northern alpine