RESEARCH METHODS FOR «HOT CRACK» DEFECTS
https://doi.org/10.17073/0368-0797-2016-11-799-805
Abstract
As a result of the comparative analysis of “hot crack” defect (“HC”) descriptions in various technological processes, the characteristics were identified that distinguish them from other defects that may be incorrectly identified as “HC” at superfi cial control. It is shown that in welding and metallurgical practice the metallographic research techniques of defect and about defective zones are used for the exact identification and classification of “HC”. In foundry production such research techniques are not used. However, taking into account complexity of formation mechanisms of “HC” and defects like “HC” in mold pieces, detailed study of such methods is required. The common regularities in macro – and a microstructure of surfaces of defect and about defective zone and characteristic features in defects like “HC” in steel shaped mold pieces are revealed. The technique of identification of “HC” in steel mold pieces was developed.
Keywords
defect,
hot crack,
quasihot crack,
classification,
identification,
macroanalysis,
microanalysis,
steel,
dendrite
About the Authors
S. S. Kuzovov
Bryansk State Technical University
Russian Federation
Russian Federation
Assistant of the Chair “Mechanical Engineering and Materials Science”,
Bryansk
K. V. Makarenko
Bryansk State Technical University
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Mechanical Engineering and Materials Science”,
Bryansk
N. A. Zhizhkina
Bryansk State Technical University
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “Mechanical Engineering and Materials Science”,
Bryansk
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Review
For citations:
Kuzovov S.S., Makarenko K.V., Zhizhkina N.A. RESEARCH METHODS FOR «HOT CRACK» DEFECTS. Izvestiya. Ferrous Metallurgy. 2016;59(11):799-805. (In Russ.) https://doi.org/10.17073/0368-0797-2016-11-799-805
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