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材料导报  2021, Vol. 35 Issue (Z1): 395-401    
  金属与金属基复合材料 |
镍铁基高温合金摩擦焊接接头在煤灰/烟气中的腐蚀行为
李博帅1,2, 鲁金涛2, 朱明1, 黄锦阳2, 党莹樱2, 谷月峰2
1 西安科技大学材料科学与工程学院,西安 710054
2 西安热工研究院有限公司,国家能源清洁高效火力发电技术研究中心,西安 710032
Corrosion Behavior of Friction Welding Joints of Ni-Fe Based Superalloy in Coal Ash/Flue Gas
LI Boshuai1,2, LU Jintao2, ZHU Ming1, HUANG Jinyang2, DANG Yingying2, GU Yuefeng2
1 College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
2 National Energy Clean and Efficient Thermal Power Technology Research Center, Xi'an Thermal Power Research Institute Co. Ltd, Xi'an 710032, China
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摘要 以HT700惯性摩擦焊焊接接头为研究对象,从腐蚀动力学、氧化膜相组成及微观结构方面研究了不同组织状态的焊接接头在750 ℃煤灰/烟气中的腐蚀行为。结果表明,焊接接头主要腐蚀产物基本一致,为富Fe、Cr的氧化物,另有少量Al2O3、TiO2及Ti的内硫化腐蚀产物。焊态焊接接头晶粒细小,Cr元素可以更加及时地扩散至焊接接头表面,氧化初期可以快速形成氧化膜,延缓腐蚀;焊后热处理态焊接接头Cr元素扩散速率低,形成连续内氧化层的时间晚于焊态组织,导致氧化膜厚度更大。两种组织状态的焊接接头不同区域的腐蚀行为均呈现晶粒越小、氧化膜越薄的特征,焊缝熔合线具有最薄的氧化膜厚度。
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李博帅
鲁金涛
朱明
黄锦阳
党莹樱
谷月峰
关键词:  Ni-Fe基高温合金  摩擦焊  煤灰/烟气腐蚀  焊缝组织  焊后热处理    
Abstract: The oxidation behavior of welded joints with different microstructure in 750 ℃ coal ash/flue gas was studied in terms of corrosion kinetics, composition of oxide film phase and microstructure of HT700 Ni-Fe based superalloy. The results show that the main corrosion products on the surface of welded joints are basically the same, mainly Fe, Cr rich oxides, and a small amount of Al2O3, TiO2 and Ti, Mo corrosion products of internal vulcanization. After welding, the diffusion rate of elements Cr welded joints is low, and the time of forming continuous oxide layer is later than that of welded structure, which leads to larger oxide film thickness. The oxidation behavior of weld seam in different regions of weld state and heat treatment state after welding shows the characteristics of smaller grain size and thinner oxide film, and the weld fusion line has the thinnest oxide film thickness.
Key words:  Ni-Fe based superalloy    friction welding    coal ash/flue gas corrosion    weld organization    heat treatment after welding
                    发布日期:  2021-07-16
ZTFLH:  TG17  
基金资助: 陕西省自然科学基础研究计划(2020JM-716);陕西省特支计划青年拔尖项目(ZD18SST05);中国华能集团有限公司科技项目(HNKJ20-H43);西安市科技计划项目(GXKD13.1)
通讯作者:  mingzhu@xust.edu.cn   
作者简介:  李博帅,西安科技大学硕士研究生。研究方向为电站高温材料。朱明,男,西安科技大学副教授,硕士研究生导师。2006年毕业于中国科学院金属研究所材料科学与工程专业,获工学博士学位。主要从事高温结构材料的高温腐蚀机理及表面防护涂层、材料表面改性和金属基复合材料等方向的研究工作。作为主要研发人员参加了包括国家自然科学基金、国家科技支撑计划项目在内的重点项目的研究和推广工作。近年来在国内外学术刊物上共发表论文20余篇,已被SCI、EI检索论文15篇,主编/参编教材4部,获发明专利4项。
引用本文:    
李博帅, 鲁金涛, 朱明, 黄锦阳, 党莹樱, 谷月峰. 镍铁基高温合金摩擦焊接接头在煤灰/烟气中的腐蚀行为[J]. 材料导报, 2021, 35(Z1): 395-401.
LI Boshuai, LU Jintao, ZHU Ming, HUANG Jinyang, DANG Yingying, GU Yuefeng. Corrosion Behavior of Friction Welding Joints of Ni-Fe Based Superalloy in Coal Ash/Flue Gas. Materials Reports, 2021, 35(Z1): 395-401.
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