| Effects of alloy elements on microstructure and crack resistance of Fe-C-Cr weld surfacing layer |
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| 作者姓名： | 孙大谦 王文权 宣兆志 任振安 |
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| 作者单位： | School of Materials Science and Engineering，Jilin University，Changchun，130025，School of Materials Science and Engineering，Jilin University，Changchun，130025，School of Materials Science and Engineering，Jilin University，Changchun，130025，School of Materials Science and Engineering，Jilin University，Changchun，130025 |
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| 基金项目： | theCommitteeofScienceandTechnologyofJilinProvince(No :19980 12 4) |
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| 摘 要： | 0 IntroductionFe C Crsurfacingalloysarewidelyusedinindustries ,mainlyduetotheirhighwearresistance .Underconditionsofabrasiveenvironments,theeffectofcompositionandmi crostructureontheabrasionresistancehasbeenextensivelystudied1～4 ] .TheauthorsalsoevaluatederosionresistanceofFe C Crweldsurfacinglayersbecausealargenumberofma chinecomponentssufferedfromsevereerosion ,suchasper cussiveplate ,rotorbladeandexhaustpipe ,etc .However,thelowcrackresistanceofFe C Crweldsurfacinglayershasbecomethei…
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| 关 键 词： | 表面焊接 耐磨性 合金成分 显微结构 焊接工艺 |
Effects of alloy elements on microstructure and crack resistance of Fe-C-Cr weld surfacing layer |
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| Sun Daqian,Wang Wenquan,Xuan Zhaozhi,Ren Zhenan.Effects of alloy elements on microstructure and crack resistance of Fe-C-Cr weld surfacing layer[J].China Welding,2003,12(2):92-97. |
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| Authors: | Sun Daqian Wang Wenquan Xuan Zhaozhi Ren Zhenan |
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| Abstract: | Effects of alloy elements on the microstructure and crack resistance of Fe-C-Cr weld surfacing layer were investigated. The results show that microstructures of the layer mainly consist of carbides and austenite matrix. Increasing C and Cr contents impair the crack resistance of the layer due to increased amount of brittle carbides. The addition of Ni, Nb or Mo improves the crack resistance of Fe-C-Cr weld surfacing layer by increasing the amount of austenite and forming fine NbC or M 7C 3 carbides in the layer. But, the excessive Nb (>2.50wt%) or Mo (>1.88wt%) impairs the crack resistance of the layer, which has relation with increased carbides or carbide coarsening and austenite matrix solid solution strengthening. The proper combination of C, Cr, Ni, Nb and Mo can further improve not only the crack resistance of Fe-C-Cr weld surfacing layer but also the erosion resistance as a result of fine NbC and M 7C 3 carbides distributing uniformly in austenite matrix. The optimal layer compositions are 3.05wt%C, 20.58wt%Cr, 1.75wt%Ni, 2.00wt%Nb and 1.88wt%Mo. |
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| Keywords: | weld surfacing layer alloy element crack resistance |
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