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4. Treatment deformations
During the conventional quenching and tempering process, deformations appear, the origin of which can be attributed to :
on the one hand, to volume variations generated by structural transformations ( , carbide precipitation, etc.) and the associated changes in material density;
on the other hand, to variations in shape linked to mechanical stresses that may be imposed on steel, whose yield strength is greatly reduced by temperature: for example, untensioned machining stresses, the parts' own mass if they are poorly supported, thermal stresses generated by temperature gradients created during heating or cooling; as a first approximation,...
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Treatment deformations
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Bibliography
Standardization
French and European standards
- Steel designation system – Part 1: Symbolic designation, main symbols. Classification number : A02-005-1. - NF EN 10027-1 - 11-1992
- Steel designation systems – Part 2: Digital systems. Classification number : A02-005-2. - NF EN 10027-2 - 11-1992
- Steel designation...
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Construire acier (formerly Office Technique pour l'Utilisation de l'Acier), 20, rue Jean Jaurès, 92800 Puteaux, France.
Center technique des industries mécaniques (CETIM), BP 67, 60304 Senlis Cedex,
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