Detail publikace

Plasma overlay welding of cobalt alloy

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

SIGMUND, M.

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"
}