Effects of Alternative Magnetic Field on Phase Structure in Ceramic Layer of Ceramic Lined Compound Steel Pipes Fabricated by SHS

Jiao Wanli

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Effects of Alternative Magnetic Field on Phase Structure in Ceramic Layer of Ceramic Lined Compound Steel Pipes Fabricated by SHS
Vol. 29, Issue 7, Pages: 596-598(2009)
Published： 2009 ，
DOI：

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[1]焦万丽.交变磁场对SHS制备复合钢管陶瓷层相结构的影响[J].特种铸造及有色合金,2009,29(07):596-598+581.

Jiao Wanli. Effects of Alternative Magnetic Field on Phase Structure in Ceramic Layer of Ceramic Lined Compound Steel Pipes Fabricated by SHS. [J]. Special Casting & Nonferrous Alloys 29(7):596-598(2009)
[1]焦万丽.交变磁场对SHS制备复合钢管陶瓷层相结构的影响[J].特种铸造及有色合金,2009,29(07):596-598+581. DOI：

Jiao Wanli. Effects of Alternative Magnetic Field on Phase Structure in Ceramic Layer of Ceramic Lined Compound Steel Pipes Fabricated by SHS. [J]. Special Casting & Nonferrous Alloys 29(7):596-598(2009) DOI：

摘要

将交变磁场引入自蔓延反应

研究其对陶瓷层的相结构的影响

采用NiO作为添加剂进行对比试验。试验结果表明

交变磁场并不改变陶瓷层的相组成。显微结构分析表明

随着磁感应强度的增加

α-Al2O3的枝晶尺寸减小

形态逐渐向细小的等轴晶形态过渡

在磁感应强度为0.2T时

出现等轴晶组织。NiO的加入增强了交变磁场的影响效果

在NiO加入量为0.4%时可以在0.1T的磁感应强度下得到细小的等轴晶组织。

Abstract

Effects of alternative magnetic field on phase structure in ceramic layer of ceramic lined compound steel pipes fabricated by SHS were described

and NiO was added as additive to contrast. The results show that change of phase structure in ceramic layer can not be observed in alternative magnetic field. With increasing in magnetic flux intensity

size of α-Al2O3 is decreased

and morphology is gradually transformed into fine equiaxed grain structure. Effects of alternative magnetic field are strengthened by adding NiO

which results in the refinement of grain size at a lower magnetic flux density.