改善Super304H不锈钢抗晶间腐蚀性能的途径  

Approach to Improve Intergranular Corrosion Resistance Performance of Super304H Stainless Steel

作　　者：钟力强[1] 朱伟恒[2] 高岩[2] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《广东电力》2014年第3期34-39,共6页Guangdong Electric Power

基　　金：中国南方电网有限责任公司科技项目(K-GD2012-385)

摘　　要：首先从成分、结构特点、与贫Cr区的关系,以及界面、合金元素和应力状态对析出的影响等方面阐述了奥氏体不锈钢中M23C6的特性;然后以超超临界压力锅炉的过热器管和再热器管常用的奥氏体Super304H不锈钢为例,结合Super304H不锈钢的成分和特点,提出通过调整晶界工程、优化高温软化工艺、加速M23C6形成和增加去敏化工艺等方法来改善Super304H钢高晶间腐蚀的敏感性;最后指出研究Super304H不锈钢去敏化过程的规律是今后的研究方向。This paper firstly states characteristics of M23 C6 in Austenitic stainless steel in aspects of ingredients,structural features,relationship between Cr-depleted zone and impacts of interface,alloying elements and stress states on precipitati-on.Taking superheater pipe of the supercritical pressure boiler and Austenitic Super403H stainless steel often used for rehea-ter pipe as examples and combining ingredients and characteristics of Super304 H stainless steel,it proposes to improve sensi-tivity of intergranular corrosion of Super304H by means of adjusting grain boundary engineering,optimizing high tempera-ture softening technics,speeding up formation of M23 C6 and increasing sensitizing technics.At last,it points out that stud-ying on laws of sensitizing process of Super304H stainless steel is a future research direction .

关 键 词：奥氏体不锈钢 SUPER304H钢 M23 C6 晶间腐蚀 M23 C6 

分 类 号：TB35[一般工业技术—材料科学与工程]