Influence of rare earth elements on solidification behavior of a high speed steel for roll using differential scanning calorimetry

被引：20

作者：

Wang Mingjia ^{[1
]}

Chen Lei ^{[1
,2
]}

Wang Zixi ^{[1
]}

Bao Er ^{[3
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

[2] Yanshan Univ, Coll Mech & Engn, Qinhuangdao 066004, Peoples R China

[3] NE Univ Nationalities, Coll Electromech & Informat Engn, Dalian 116600, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2011年 / 29卷 / 11期

关键词：

high speed steel roll; rare earths; solidification; DSC; CAST-IRON; MICROSTRUCTURES;

D O I：

10.1016/S1002-0721(10)60604-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of rare earths (RE) on solidification behavior of a high speed steel for roll was investigated by using differential scanning calorimetry (DSC) in combination of microstructure analysis. It was found that the sequence of solidification was L ->gamma, L ->gamma+MC, L ->gamma+M2C, L ->gamma+M6C, respectively. The start temperature and the latent heat liberated by unit mass of L ->gamma and L ->gamma+MC increased with increase of RE addition, indicating that RE could trigger the crystallization of the primary gamma and the MC carbide more effectively. The promoting effect of RE on the heterogeneous nucleation was believed to be an important cause of this effect. Grain refinement, discontinuous network of eutectic carbides and disperse and finer MC were observed in the samples with RE addition, moreover, RES could act as the heterogeneous nucleus of the MC. RE addition was favorable for stable M6C at the expense of the metastable M2C.

引用

页码：1089 / 1094

页数：6

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