Analysis of Valence Electron Structure of RE in Solid Solution in Medium and Low Carbon Steel
来源期刊：JOURNAL OF RARE EARTHS2004年第2期
论文作者：刘艳 朱莹光 刘伟东 刘志林
Key words：metal materials; valence electron structure; phase transformation; recrystallization; rare earths;
Abstract: According to EET theory,the valence electron structures of RE in the solid solution of austenite,pearlite and martensite were calculated.The influence of RE in solid solution on phase transformation of pearlite and recrystallization of martensite was explained by the valence electron structure data of phases.Calculating results indicate that C element is favorite to enhance the number of RE in the solid solution.RE in the solute solution shortens the incubation period of proeutectoid ferrite,increases its quantity and carbon content,decreases the quantity of pearlite and thickness of its lamellas and lamellar spacing,then the strength and hardness of pearlite are improved and granular pearlite can be obtained.RE dissolved in martensite intensifies martensite,enhances tempering stability of martensite,increases its recrystallization temperature and prolongs the holding time needed during tempering.
刘艳1，朱莹光1，刘伟东1，刘志林1
(1.Department of Material and Chemical Engineering,Liaoning Institute of Technology,Jinzhou 121001,China;
2.College of Science,Northeastern University,Shenyang 110006,China)
Abstract:According to EET theory,the valence electron structures of RE in the solid solution of austenite,pearlite and martensite were calculated.The influence of RE in solid solution on phase transformation of pearlite and recrystallization of martensite was explained by the valence electron structure data of phases.Calculating results indicate that C element is favorite to enhance the number of RE in the solid solution.RE in the solute solution shortens the incubation period of proeutectoid ferrite,increases its quantity and carbon content,decreases the quantity of pearlite and thickness of its lamellas and lamellar spacing,then the strength and hardness of pearlite are improved and granular pearlite can be obtained.RE dissolved in martensite intensifies martensite,enhances tempering stability of martensite,increases its recrystallization temperature and prolongs the holding time needed during tempering.
Key words:metal materials; valence electron structure; phase transformation; recrystallization; rare earths;
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