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SIGMUND, M.
Originální název
Plasma overlay welding of cobalt alloy
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
This article describes the overlay welding of a cobalt alloy. This overlay is made by the plasma transfer arc (PTA) welding technology. Cobalt alloy is overlaid on a creep resistant steel as the seat of a high-pressure steam valve. High-pressure steam valves are used in the energy, nuclear, petrochemical, oil, gas and pharmaceutical industries. Creep resistant high alloy steels are weldable with proper welding conditions, including stress relieving. Cobalt alloys, on the other hand, have worse weldability. Overlay welding of these heterogeneous materials is possible as well with meeting specific conditions especially proper welding parameters. In this article, the whole experiment is described, including design of the part that is overlaid by plasma arc welding. The technological procedure of overlay welding is described, including a description of the welding equipment, subsequent evaluation and all standards and specified inspections needed for welding procedure qualification (WPQR). WPQR qualification of overlay welding was also done and finished with Notify Body.
Klíčová slova
Cobalt alloy – Stellite, creep resistant steel, overlay welding, plasma transfer arc (PTA) welding, valve seat, metal powder, preheating, hardness, pWPS, WPQR, WPS.
Autoři
Vydáno
1. 10. 2019
Nakladatel
MM (Modern Machinery) Science Journal
Místo
Prague
ISSN
1803-1269
Periodikum
MM Science Journal
Ročník
2019
Číslo
10
Stát
Česká republika
Strany od
2982
Strany do
2986
Strany počet
5
URL
https://www.mmscience.eu/journal/issues/October%202019/articles/plasma-overlay-welding-of-cobalt-alloy
BibTex
@article{BUT159010, author="Marian {Sigmund}", title="Plasma overlay welding of cobalt alloy", journal="MM Science Journal", year="2019", volume="2019", number="10", pages="2982--2986", doi="10.17973/MMSJ.2019\{_}10\{_}2018132", issn="1803-1269", url="https://www.mmscience.eu/journal/issues/October%202019/articles/plasma-overlay-welding-of-cobalt-alloy" }