Effect of rare earth elements on the thermal cracking resistance of high speed steel rolls

The effect of rare earth elements on the thermal cracking resistance of high speed steel （HSS） rolls was investigated. Laser rapid heating was used for thermal fatigue experiments. Thermal cracks and microstructure were observed using metalloscopy and scanning electron microscopy. The results showed...

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Bibliographic Details
Published inJournal of rare earths Vol. 29; no. 5; pp. 489 - 493
Main Author 王明家 李艳美 王子兮 包耳
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2011
Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China%College of Electromechanical and Information Engineering, Dalian Nationalities University, Dalian 116600, China
Subjects
Carbides
Cracks
Fatigue cracking
Fracture mechanics
high speed steel roll
High speed tool steels
HSS
M7C3型碳化物
MC型碳化物
Rare earth elements
Rare earth metals
Rolls
thermal cracking resistance
共晶碳化物
稀土元素
high speed steel roll
rare earth elements
thermal cracking resistance
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(10)60485-1

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Summary:The effect of rare earth elements on the thermal cracking resistance of high speed steel （HSS） rolls was investigated. Laser rapid heating was used for thermal fatigue experiments. Thermal cracks and microstructure were observed using metalloscopy and scanning electron microscopy. The results showed that thermal cracks initiated from the interface between the matrix and eutectic carbides （including M6C and M7C3 type carbides）,and propagated along the interface between the two phases. MC type carbides enriched with vanadium could prevent the propagation of thermal cracks. The presence of rare earth elements decreased the quantity of big eutectic carbides,and proportionally increased spherical and rod-shaped MC type carbide content. HSS0 （0.00% RE） had approximately three times the thermal cracking density of HSS3 （0.12 wt.% RE）. Rare earth elements were shown to significantly improve the microstructure and thermal cracking resistance of HSS rolls.
Bibliography:11-2788/TF
WANG Mingjia ,LI Yanmei,WANG Zixi ,BAO Er （1. Key Laboratory of Metastable Materials Science and Technology,College of Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China; 2. College of Electromechanical and Information Engineering,Dalian Nationalities University,Dalian 116600,China）
high speed steel roll; thermal cracking resistance; rare earth elements
The effect of rare earth elements on the thermal cracking resistance of high speed steel （HSS） rolls was investigated. Laser rapid heating was used for thermal fatigue experiments. Thermal cracks and microstructure were observed using metalloscopy and scanning electron microscopy. The results showed that thermal cracks initiated from the interface between the matrix and eutectic carbides （including M6C and M7C3 type carbides）,and propagated along the interface between the two phases. MC type carbides enriched with vanadium could prevent the propagation of thermal cracks. The presence of rare earth elements decreased the quantity of big eutectic carbides,and proportionally increased spherical and rod-shaped MC type carbide content. HSS0 （0.00% RE） had approximately three times the thermal cracking density of HSS3 （0.12 wt.% RE）. Rare earth elements were shown to significantly improve the microstructure and thermal cracking resistance of HSS rolls.
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SourceType-Scholarly Journals-1
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ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(10)60485-1