Effect of porosity on the reliability of magnetic quality control of the heat treatment of sintered steels

The authors investigate the effect of porosity on the hardness and magnetic properties of sintered carbon steel 30N2M after sintering and heat treatment with the purpose of using this dependence as a nondestructive quality control technique in the production line. They find a significant drop in coe...

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Veröffentlicht in:	Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States) 1987-07, Vol.26 (7), p.553-556
Hauptverfasser:	Ul'yanov, A. I., Korobeinikova, V. S., Sterkhov, G. V., Sidorov, N. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	360102 - Metals & Alloys- Structure & Phase Studies 360103 - Metals & Alloys- Mechanical Properties 360104 - Metals & Alloys- Physical Properties ALLOYS CARBON ADDITIONS CARBON STEELS COERCIVE FORCE CONTROL CRYSTAL STRUCTURE CRYSTAL-PHASE TRANSFORMATIONS FABRICATION HARDNESS HEAT TREATMENTS IRON ALLOYS IRON BASE ALLOYS LEAST SQUARE FIT MAGNETIC PROPERTIES MAGNETIZATION MARTENSITE MATERIALS MATERIALS SCIENCE MATERIALS TESTING MAXIMUM-LIKELIHOOD FIT MECHANICAL PROPERTIES METALLURGY MICROSTRUCTURE MOLYBDENUM ALLOYS NICKEL ALLOYS NONDESTRUCTIVE TESTING NUMERICAL SOLUTION PEARLITE PHASE TRANSFORMATIONS PHYSICAL PROPERTIES POROSITY POWDER METALLURGY QUALITY CONTROL SINTERED MATERIALS SINTERING STEELS TESTING
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Zusammenfassung:	The authors investigate the effect of porosity on the hardness and magnetic properties of sintered carbon steel 30N2M after sintering and heat treatment with the purpose of using this dependence as a nondestructive quality control technique in the production line. They find a significant drop in coercive force and hardness with increasing porosity and attribute this to martensitic-pearlitic transformations within the structure. A reduction in thermal conductivity is also observed.
ISSN:	0038-5735 1573-9066
DOI:	10.1007/BF01156556