超临界CO_(2)腐蚀对耐热材料力学性能影响研究进展  

Effect of Corrosion Behavior on Mechanical Properties of Alloy in Supercritical CO_(2) Environment

作　　者：王梦瑶[1] 梁志远[1] 桂雍 郭亭山 邵怀爽 赵钦新[1] WANG Mengyao;LIANG Zhiyuan;GUI Yong;GUO Tingshan;SHAO Huaishuang;ZHAO Qinxin(Key Laboratory of Thermo-Fluid Science and Engineering of MOE,(School of Energy and Power Engineering,Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China)

机构地区：[1]热流科学与工程教育部重点实验室(西安交通大学能源与动力工程学院),陕西省西安市710049

出　　处：《中国电机工程学报》2023年第17期6709-6717,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52276015);中国博士后科学基金(2020M683474,BX20190269)。

摘　　要：超临界二氧化碳循环系统为清洁能源发展提供了新途径,但高温与含碳环境对耐热材料力学性能和抗腐蚀性能等提出了新的挑战。温度过高时,结构材料在抗氧化性和结构完整性等方面性能要更优异,超临界CO_(2)环境下腐蚀与渗碳综合作用会使耐热钢形成碳化物,造成其抗氧化性和力学性能降低。因此,建立安全稳定超临界CO_(2)循环发电系统的前提是明确在超临界CO_(2)环境中候选材料的最高长时使用温度,以及确定腐蚀与渗碳的综合作用对候选材料的蠕变性能与抗渗碳能力的影响。该文总结国内外关于超临界二氧化碳腐蚀对耐热钢、镍基合金等耐热材料力学性能影响的研究现状,分析合金成分、温度、压力、杂质等因素对耐热材料力学性能的影响规律,讨论渗碳对于裂纹生长以及裂纹扩展等的影响机理,并提出目前实验以及分析的不足之处及未来的发展方向。The supercritical carbon dioxide cycle system provides a new way for the development of clean energy.But high temperature poses challenges to the oxidation resistance and strength of materials,including the ability to resist creep deformation and maintain mechanical strength.When the temperature is too high,the structural material must behave better in terms of oxidation resistance and structural integrity.The combined action of corrosion and carburizing in supercritical CO_(2) environment can form carbides in heat-resistant steel.Therefore,it is very important to determine the maximum long-term service temperature of materials in supercritical CO_(2) environment,as well as the combined effects of corrosion and carburizing on the mechanical properties of candidate materials.This paper summarizes the research status of the influence of supercritical carbon dioxide corrosion on the mechanical properties of heat resistant steel and nickel-base alloy.The influence mechanism of carburizing on crack growth and crack propagation is analyzed,and the shortcomings of current experiment and analysis are pointed out.

关 键 词：超临界CO_(2)动力系统 腐蚀 力学性能 耐热钢 蠕变 

分 类 号：TG132[一般工业技术—材料科学与工程]