TY - GEN
T1 - Alloying effect on reverse transformation from tempered martensite
AU - Miyamoto, Goro
AU - Usuki, Hirokazu
AU - Li, Zhao Dong
AU - Furuhara, Tadashi
PY - 2008/1/1
Y1 - 2008/1/1
N2 - Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.
AB - Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.
KW - Austenite
KW - Cementite
KW - Kinetics
KW - Martensite
KW - Reverse transformation
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M3 - Conference contribution
AN - SCOPUS:84928227184
T3 - Proceedings of the 17th IFHTSE Congress
SP - 482
EP - 485
BT - Proceedings of the 17th IFHTSE Congress
PB - The Japan Society for Heat Treatment (JSHT)
T2 - 17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
Y2 - 26 October 2008 through 28 October 2008
ER -