EFFECT OF WELDING CONDITIONS ON COOLING RATE AND HARDNESS IN THE HEAT AFFECTED ZONE

RELATIONSHIPS HAVE BEEN ESTABLISHED BETWEEN THE ARC WELDING PARAMETERS AND THE WELD SIZE AND COOLING RATE FOR THE CONTINUOUS-ELECTRODE PROCESSES OVER A WIDE RANGE OF TRAVEL SPEEDS. THE CROSS-SECTIONAL AREA OF THE FUSED METAL IS RELATED TO THE PRODUCT OF THE EFFECTIVE HEAT AND THE CUBE ROOT OF THE TRAVEL SPEED; THE COOLING RATE IS INVERSELY PROPORTIONAL TO THE HEAT INPUT, AS PREDICTED BY CLASSICAL HEAT FLOW THEORY. THE EFFECT OF TRAVEL SPEED AND INDENTATION LOAD ON THE MEASURED HARDNESS IN THE HEAT-AFFECTED ZONE OF A LOW-ALLOY STEEL HAS ALSO BEEN INVESTIGATED. THE HARDNESS RANGE WAS FOUND TO BE APPROXIMATELY THE SAME FOR A FIXED HEAT INPUT, REGARDLESS OF THE TRAVEL SPEED USED. THE USE OF LOW INDENTATION LOADS PRODUCED A WIDE RANGE OF HARDNESS VALUES, DUE TO THE HETEROGENEOUS CHARACTER OF THE HEAT-AFFECTED ZONE MICROSTRUCTURE. HEAVIER LOADS PRODUCED AVERAGE HARDNESS VALUES, WHICH WOULD BE EXPECTED TO CORRELATE MORE CLOSELY WITH CRACK SENSITIVITY. /AUTHOR/

• Supplemental Notes:
  • Vol 48, No 11, PP 499-S - 504-S
• Authors:
  • Bradstreet, B J
• Publication Date: 1969-11

Media Info

• Serial:
  • Welding Journal American Welding Soc

Subject/Index Terms

• TRT Terms: Cooling; Cracking; Electric arc welding; Electrodes; Hardness; Heat; Rates; Size
• Uncontrolled Terms: Parameters; Relationships; Zone
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216924
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1970 12:00AM