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Erosion during Brazing in Stainless Steel grade 304
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The erosion or dissolution of stainless steel grade 304 as base metal by molten brazing fillermetal was investigated using one nickel and two iron based filler metals. The difference betweentwo iron filler metal is 5 % Manganese content in one of the filler metal. The Wettability of fillermetal is effected by oxidation of base or filler metal for which high vacuum or non reacting gasis used as a furnace atmosphere to reduce the partial pressure of oxygen. The furnace parameterseffecting erosion of base metal was observed e.g. peak temperature and brazing time. The effectof filler mass was also observed. The erosion depth was measured by light optical microscope.All the three filler metal shows different erosion behavior in nitrogen atmosphere compare tohigh vacuum. In high vacuum some of the elements evaporates at brazing temperature whichchanges the properties of filler metal. This change of composition in filler metal was observed byEDX analysis. SEM analysis was used to identify different element rich phases.

Place, publisher, year, edition, pages
2012. , 50 p.
Keyword [en]
Erosion, dissolution of base, filler metal, Wettability, oxygen partial pressure, high vacuum, SEM analysis.
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-116688OAI: oai:DiVA.org:kth-116688DiVA: diva2:600280
External cooperation
Höganäs AB
Subject / course
Materials Design and Engineering
Educational program
Master of Science - Materials Science and Engineering
Uppsok
Technology
Supervisors
Available from: 2013-02-11 Created: 2013-01-23 Last updated: 2013-02-11Bibliographically approved

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Erosion during Brazing in Stainless Steel grade 304(8004 kB)1118 downloads
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CiteExportLink to record
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  • apa
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