定向凝固富W钴基高温合金的氧化和热腐蚀行为

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/METAL/2021033

Yue Zhou, C. Mo, Hong Wang

{"title":"定向凝固富W钴基高温合金的氧化和热腐蚀行为","authors":"Yue Zhou, C. Mo, Hong Wang","doi":"10.1051/METAL/2021033","DOIUrl":null,"url":null,"abstract":"In this study, isothermal and hot corrosion in molten 75 mass% Na2 SO4 +25 mass% NaCl at 900 °C was carried out on an W richen Co-based directionally solidified Co-27.53Cr-9.85W-10.29Ni-0.75Al superalloy. For comparison, K38G with composition of 16.34Cr-4Al-1.77Mo-3.81Ti-2.66W-8.38Co were also conducted under same condition. Isothermal oxidation indicates that Co-based superalloy forms a Co-oxide dispersion chromia scale. However, K38G forms a purer chromia scale due to higher weight percentage ratio of Cr to Al. Under molten Na2 SO4 -NaCl salts, the defects in Ni/Co oxide dispersion chromia layer make it feasible that the molten salt can penetrates along grain boundaries into the internal interface to form internal sulfides, which causes the spallation of scales and significantly decreases its hot corrosion resistance.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"13 1","pages":"313"},"PeriodicalIF":0.9000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Oxidation and hot corrosion behavior of a directionally solidified W richen cobalt-based superalloy\",\"authors\":\"Yue Zhou, C. Mo, Hong Wang\",\"doi\":\"10.1051/METAL/2021033\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this study, isothermal and hot corrosion in molten 75 mass% Na2 SO4 +25 mass% NaCl at 900 °C was carried out on an W richen Co-based directionally solidified Co-27.53Cr-9.85W-10.29Ni-0.75Al superalloy. For comparison, K38G with composition of 16.34Cr-4Al-1.77Mo-3.81Ti-2.66W-8.38Co were also conducted under same condition. Isothermal oxidation indicates that Co-based superalloy forms a Co-oxide dispersion chromia scale. However, K38G forms a purer chromia scale due to higher weight percentage ratio of Cr to Al. Under molten Na2 SO4 -NaCl salts, the defects in Ni/Co oxide dispersion chromia layer make it feasible that the molten salt can penetrates along grain boundaries into the internal interface to form internal sulfides, which causes the spallation of scales and significantly decreases its hot corrosion resistance.\",\"PeriodicalId\":18527,\"journal\":{\"name\":\"Metallurgical Research & Technology\",\"volume\":\"13 1\",\"pages\":\"313\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2021-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Metallurgical Research & Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1051/METAL/2021033\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metallurgical Research & Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1051/METAL/2021033","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

摘要

本文研究了一种富W co基定向凝固Co-27.53Cr-9.85W-10.29Ni-0.75Al高温合金在75质量% Na2 SO4 +25质量% NaCl熔液中900℃的等温和热腐蚀。为了比较，在相同条件下也进行了成分为16.34Cr-4Al-1.77Mo-3.81Ti-2.66W-8.38Co的K38G。等温氧化表明，co基高温合金形成了Co-oxide弥散色标。而K38G由于Cr与Al的质量比较高，形成了更纯净的铬层。在Na2 SO4 -NaCl盐的熔融作用下，Ni/Co氧化物弥散铬层的缺陷使得熔盐沿晶界渗透到内部界面形成内部硫化物，导致了铬层的剥落，显著降低了其耐热腐蚀能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Oxidation and hot corrosion behavior of a directionally solidified W richen cobalt-based superalloy

In this study, isothermal and hot corrosion in molten 75 mass% Na2 SO4 +25 mass% NaCl at 900 °C was carried out on an W richen Co-based directionally solidified Co-27.53Cr-9.85W-10.29Ni-0.75Al superalloy. For comparison, K38G with composition of 16.34Cr-4Al-1.77Mo-3.81Ti-2.66W-8.38Co were also conducted under same condition. Isothermal oxidation indicates that Co-based superalloy forms a Co-oxide dispersion chromia scale. However, K38G forms a purer chromia scale due to higher weight percentage ratio of Cr to Al. Under molten Na2 SO4 -NaCl salts, the defects in Ni/Co oxide dispersion chromia layer make it feasible that the molten salt can penetrates along grain boundaries into the internal interface to form internal sulfides, which causes the spallation of scales and significantly decreases its hot corrosion resistance.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.