Structure Analyses of Experimental Welds Designed for Repair Welding of VVER 1000 Presssure Vessel

Miroslava Matějová; Dagmar Jandová; Josef Kasl

doi:10.4028/www.scientific.net/KEM.647.131

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 647Structure Analyses of Experimental Welds Designed...

Structure Analyses of Experimental Welds Designed for Repair Welding of VVER 1000 Presssure Vessel

Abstract:

Microstructural analysis and microhardness measurement of experimental repair weld joints were carried out in heat affected zone (HAZ) of the base material (BM) – steel 15Ch2NMFA after weld deposition of several layers by welding metal of Inconel FM 52. A temper bead welding (TBW) technique was used. Required microhardness up to 350 HV0.1 in heat affected zone of base material in distance 0.5 mm from fusion line was exceeded in all three experimental blocks with various welding energy inputs during deposition of three or five weld layers. Metallography showed reaustenitization and structure transformation in HAZ after the deposit of first layer in all three blocks. After deposit of the last layer the structure of HAZ in two blocks was tempered only and one variant of them have been recommended for futher technological tests. Structure of HAZ of the third block was not full tempered even after the last layer deposit.

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Periodical:

Key Engineering Materials (Volume 647)

Pages:

131-140

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.647.131

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Online since:

May 2015

Authors:

Miroslava Matějová*, Dagmar Jandová, Josef Kasl

Keywords:

Inconel Fm 52, Microhardness HV, Microstructure, Pressure Vessel of Nuclear Power Plant, Repair Welding, Steel 15Ch2NMFA, Temper Bead Welding

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References

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DOI: 10.5937/zzk1702077c

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