Exhaust Valve Spindles for Marine Diesel Engines Manufactured by Hot Isostatic Pressing

A. Lapina, H. Hoeg, J. Knudsen, T. Berglund, Rune Møller, J. Hattel
{"title":"Exhaust Valve Spindles for Marine Diesel Engines Manufactured by Hot Isostatic Pressing","authors":"A. Lapina, H. Hoeg, J. Knudsen, T. Berglund, Rune Møller, J. Hattel","doi":"10.21741/9781644900031-14","DOIUrl":null,"url":null,"abstract":". The exhaust valve spindle is one of the most challenging components in the marine two-stroke diesel engine. It has to withstand high mechanical loads, thermal cycling, surface temperatures beyond 700 ° C, and molten salt induced corrosion. Powder metallurgy gives the opportunity of improving the component using materials not applicable by welding or forging. Therefore exhaust valve spindles have been produced by Hot Isostatic Pressing (HIP) with a spindle disc coating of a Ni-Cr-Nb alloy that cannot be manufactured by welding or forging. This paper presents the service experience gathered by MAN Diesel & Turbo in a number of service tests on ships (up to 18000 running hours): corrosion and degradation phenomena in the spindles produced by HIP are presented and compared with the performance of state-of-the-art exhaust valve spindles. The macroscopic geometrical changes experienced by the spindles are studied by means of Finite Element Method (FEM) calculations and strategies for further development of the component are outlined.","PeriodicalId":202011,"journal":{"name":"Hot Isostatic Pressing: HIP’17","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hot Isostatic Pressing: HIP’17","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21741/9781644900031-14","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

. The exhaust valve spindle is one of the most challenging components in the marine two-stroke diesel engine. It has to withstand high mechanical loads, thermal cycling, surface temperatures beyond 700 ° C, and molten salt induced corrosion. Powder metallurgy gives the opportunity of improving the component using materials not applicable by welding or forging. Therefore exhaust valve spindles have been produced by Hot Isostatic Pressing (HIP) with a spindle disc coating of a Ni-Cr-Nb alloy that cannot be manufactured by welding or forging. This paper presents the service experience gathered by MAN Diesel & Turbo in a number of service tests on ships (up to 18000 running hours): corrosion and degradation phenomena in the spindles produced by HIP are presented and compared with the performance of state-of-the-art exhaust valve spindles. The macroscopic geometrical changes experienced by the spindles are studied by means of Finite Element Method (FEM) calculations and strategies for further development of the component are outlined.
热等静压制船用柴油机排气阀轴
. 排气阀轴是船用二冲程柴油机中最具挑战性的部件之一。它必须承受高机械负荷,热循环,表面温度超过700°C,以及熔盐引起的腐蚀。粉末冶金为使用焊接或锻造不适用的材料改进部件提供了机会。因此,排气阀主轴采用热等静压(HIP)生产,主轴盘涂有Ni-Cr-Nb合金,不能通过焊接或锻造制造。本文介绍了MAN Diesel & Turbo在船舶(运行时间高达18000小时)的多次服务试验中收集到的服务经验:介绍了HIP生产的主轴的腐蚀和退化现象,并将其与最先进的排气阀主轴的性能进行了比较。采用有限元方法对主轴的宏观几何变化进行了研究,并提出了进一步发展的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信