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4. Risks. Precautions. Remedies
During heat treatment, certain precautions must be taken to avoid rejecting parts. Some of these precautions are more specific to a given treatment, while others require strict adherence to the defined heat cycle.
4.1 Precautions specific to each treatment
They are listed in the table at 3 and concern the risks of tapping, deformation and thermal brittleness.
Tapping is linked to either part geometry or metallurgical problems. While the former are independent of heat treatment, the latter can result from it (excess internal stresses, cohabitation of different structures, particularly acicular ones).
Deformations are caused by high residual stresses...
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Risks. Precautions. Remedies
Bibliography
References
Standardization
- Foundry – Cast iron with lamellar graphite (classification index: A32-101) - NF EN 1561 - 10-1997
- Foundry – Malleable cast iron (classification index: A32-701) - NF EN 1562 - 10-1997
- Foundry – Malleable cast iron (classification index: A32-701/A1) - NF EN 1562/A1 - 9-2006
- Foundry – Spheroidal graphite cast iron (2nd edition, March 1998) (classification index: A32-201) - NF EN 1563 - 10-1997
- Foundry...
Theses
http://www.sudoc.abes.fr
ADRIEN (J.). – Optimization of thermal cycles applied to ferritic GS cast irons with respect to fatigue properties. INSA de Lyon (2004).
SERBAN (F.). – Evaluation and modeling of residual stresses in austenoferritic spheroidal graphite cast irons: influence of thermal and thermomechanical treatment. University of Reims, Champagne-Ardenne (2004).
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