摘要
铁素体-奥氏体双相不锈钢比奥氏体不锈钢有较高的机械性能、优良的耐应力腐蚀和点腐蚀性能以及较低的价格(Ni含量低),特别是通过降低钢中的碳含量和增加氮含量而改善了钢的可焊性。双相钢中含较高的氮含量有两个有利的因素:抑制δ-铁素体的形成和提高抗点蚀当量。介绍了4种不同类型的含氮双相不锈钢和常用双相不锈钢的牌号和化学成分、双相不锈钢5种冶金工艺、太钢双相不锈钢的生产、高氮双相不锈钢的形变热处理以及双相不锈钢的研究和发展趋势。
As compared with austenite stainless steel, the ferrite-austenite duplex stainless steel has higher mechanical properties, excellent stress and pitting corrosion, and lower cost due to lower Ni content, especially improve weldability of steel due to lower carbon content and higher nitrogen content in steel. Higher nitrogen content in duplex stainless steel has two favourable factors- depressing formation of 8- ferrite and increasing pitting resistance equivalent. The 4 kinds of nitrogen- bearing duplex stainless steel grades, and designation and chemical compositions of conventional duplex stainless steel; 5 kinds of metallurgical processes ; production of duplex stainless steel at Taiyuan Steel, thermomechanical processing for duplex stainless steel and trend of research and development of duplex stainless steel are presented in this article.
出处
《特殊钢》
北大核心
2006年第4期36-38,共3页
Special Steel
关键词
含氮
双相不锈钢
冶金工艺
Nitrogen-Bearing, Duplex Stainless Steel, Metallurgical Process
