High-temperature mechanical properties of near-eutectoid steel

The high-temperature mechanical properties of near-eutectoid steel were studied with a Cleeble-1500 simu- lation machine. Zero strength temperature （ZST）, zero ductility temperature （ZDT）, hot ductility curves, and strength curves were measured. Two brittle zones and one plastic zone were found in t...

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Veröffentlicht in:	International journal of minerals, metallurgy and materials metallurgy and materials, 2013-09, Vol.20 (9), p.829-834
Hauptverfasser:	Fu, Jun, Wang, Fu-ming, Hao, Fang, Jin, Gui-xiang
Format:	Artikel
Sprache:	eng
Schlagworte:	Billets Ceramics Characterization and Evaluation of Materials Chemistry and Materials Science Composites Corrosion and Coatings Crack initiation Ductility Ductility tests Eutectoid temperature Glass Grain boundaries Heat resistant steels High temperature Inclusions Materials Science Mechanical properties Melting point Melting points Metallic Materials Metallurgy Natural Materials Pearlite Pearlitic transformations Plastic zones Precipitates Segregations Steels Strength Surface cracks Surfaces and Interfaces Thermal simulation Thin Films Tribology 强度曲线温度范围热延性珠光体转变过共析钢零塑性温度零强度温度高温力学性能
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Zusammenfassung:	The high-temperature mechanical properties of near-eutectoid steel were studied with a Cleeble-1500 simu- lation machine. Zero strength temperature （ZST）, zero ductility temperature （ZDT）, hot ductility curves, and strength curves were measured. Two brittle zones and one plastic zone were found in the temperature range from the melting point to 600℃. Embrittlement in zone I is caused by the existence of liquid film along dendritic interfaces. Ductility loss in zone Ⅲ mainly results from precipitates and inclusions as well as S segregation along grain boundaries. Pearlite transformation also accounts for ductility deterioration in the temperature range of 700-600℃. Moreover, the straightening temperature of the test steel should be higher than 925℃ for avoiding the initiation and propagation of surface cracks in billets.
ISSN:	1674-4799 1869-103X
DOI:	10.1007/s12613-013-0803-7