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Title: Weldment for austenitic stainless steel and method

Abstract

For making defect-free welds for joining two austenitic stainless steel mers, using gas tungsten-arc welding, a thin foil-like iron member is placed between the two steel members to be joined, prior to making the weld, with the foil-like iron member having a higher melting point than the stainless steel members. When the weld is formed, there results a weld nugget comprising melted and then solidified portions of the joined members with small portions of the foil-like iron member projecting into the solidified weld nugget. The portions of the weld nugget proximate the small portions of the foil-like iron member which project into the weld nugget are relatively rich in iron. This causes these iron-rich nugget portions to display substantial delta ferrite during solidification of the weld nugget which eliminates weld defects which could otherwise occur. This is especially useful for joining austenitic steel members which, when just below the solidus temperature, include at most only a very minor proportion of delta ferrite.

Inventors:
 [1];  [1]
  1. (Hempfield, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
865697
Patent Number(s):
4558202
Assignee:
United States of America as represented by Department of Energy (Washington, DC) OSTI
DOE Contract Number:  
AM02-76CH94000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
weldment; austenitic; stainless; steel; method; defect-free; welds; joining; mers; gas; tungsten-arc; welding; foil-like; iron; placed; joined; prior; weld; melting; formed; results; nugget; comprising; melted; solidified; portions; projecting; proximate; relatively; rich; causes; iron-rich; display; substantial; delta; ferrite; solidification; eliminates; defects; otherwise; occur; especially; useful; below; solidus; temperature; minor; proportion; weld nugget; delta ferrite; austenitic steel; especially useful; stainless steel; austenitic stainless; relatively rich; gas tungsten; minor proportion; /219/228/428/

Citation Formats

Bagnall, Christopher, and McBride, Marvin A. Weldment for austenitic stainless steel and method. United States: N. p., 1985. Web.
Bagnall, Christopher, & McBride, Marvin A. Weldment for austenitic stainless steel and method. United States.
Bagnall, Christopher, and McBride, Marvin A. Tue . "Weldment for austenitic stainless steel and method". United States. https://www.osti.gov/servlets/purl/865697.
@article{osti_865697,
title = {Weldment for austenitic stainless steel and method},
author = {Bagnall, Christopher and McBride, Marvin A.},
abstractNote = {For making defect-free welds for joining two austenitic stainless steel mers, using gas tungsten-arc welding, a thin foil-like iron member is placed between the two steel members to be joined, prior to making the weld, with the foil-like iron member having a higher melting point than the stainless steel members. When the weld is formed, there results a weld nugget comprising melted and then solidified portions of the joined members with small portions of the foil-like iron member projecting into the solidified weld nugget. The portions of the weld nugget proximate the small portions of the foil-like iron member which project into the weld nugget are relatively rich in iron. This causes these iron-rich nugget portions to display substantial delta ferrite during solidification of the weld nugget which eliminates weld defects which could otherwise occur. This is especially useful for joining austenitic steel members which, when just below the solidus temperature, include at most only a very minor proportion of delta ferrite.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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