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Formulation and growth of present ideas on heat-affected-zone cracking: M34-20/99E-PDF

“Heat-affected-zone cracking is a problem in the metal-arc welding of hardenable steels. Encountered first in welding armour, the problem has persisted because high strength is now demanded in steels for many purposes. There are four main factors responsible: a) The hardenability of the steel which depends on carbon and alloy content. b) The cooling rate in the joint which depends on heat input, thermal severity and ambient temperature. c) The hydrogen available in the heat-affected zone, most commonly derived from moisture in the electrode covering. d) Stresses built up in the joint because of thermal contractions. The origins of the salient ideas about the problem have been traced among the more important contributions to an abundant literature on the subject. The fairly obvious dangers of heat affected zone cracking are dealt with briefly. Methods of varying complexity, based mainly on the elimination of hydrogen and the control of heat input, are described for the prevention of heat-affected-zone cracking"--Abstract, p. i.

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Department/Agency Natural Resources Canada. Mines Branch.
Title Formulation and growth of present ideas on heat-affected-zone cracking
Series Title Technical bulletin ;
Publication Type Series - View Master Record
Language [English]
Format Electronic
Electronic Document

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Note Cover title. "March 1968." Digitized edition from print [produced by Natural Resources Canada].
Date 1968.
Number of Pages vi, 43 p.
Catalogue Number
  • M34-20/99E-PDF
Departmental Catalogue Number 299985
Subject Terms Steel