论文部分内容阅读
常用的铬镍奥氏体不锈钢含有贵缺的元素镍,这类钢代镍的问题,早就引起人们的注意。从1958年起,中国科学院金属研究所开展了以锰和氮代镍的铬锰氮奥氏体—铁素体复相不锈钢的研究。经过生产和使用部门的共同努力,已将一种0Cr17Mn14Mo2N钢作成设备和部件,应用到腐蚀性的尿素、醋酸、合成纤维和印染等工业介质。实践证明其耐蚀性和使用性良好。实验室的研究得出,这种钢在稀硝酸、磷酸、草酸和柠檬酸中具有与铬镍不锈钢相近或更高的耐蚀性。但在稀硫酸中,耐蚀性很差,不能使用。因此,有必要改善它的耐蚀性能。本文研究了合金元素在提高铬氮锰不锈钢腐蚀中的作用。
Commonly used chrome-nickel austenitic stainless steel contains a lack of elemental nickel, nickel-based steel on this issue, has long attracted people’s attention. Since 1958, the Institute of Metal Research, Chinese Academy of Sciences has conducted research on austenitic-ferritic duplex stainless steels with manganese and nitrogen-substituted nickel. Through the joint efforts of the production and use departments, a 0Cr17Mn14Mo2N steel has been made into equipment and components for use in corrosive industrial media such as urea, acetic acid, synthetic fibers and printing and dyeing. Practice has proved its corrosion resistance and good use. Laboratory studies have shown that this steel has similar or higher corrosion resistance to dilute nitric acid, phosphoric acid, oxalic acid and citric acid than chromium-nickel stainless steel. But in dilute sulfuric acid, corrosion resistance is poor, can not be used. Therefore, it is necessary to improve its corrosion resistance. In this paper, the effect of alloying elements on improving the corrosion of chromium, nitrogen and manganese stainless steel was studied.