Microstructure and properties of Zr/FeCSiB layers produced by laser cladding

Zhang Qingmao; He Jinjiang; Liu Wenjin; Zhong Minlin

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Volume 27 Issue 2

Sep. 2013

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Article Navigation > LASER TECHNOLOGY > 2003 > 27(2): 81-84,93

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Microstructure and properties of Zr/FeCSiB layers produced by laser cladding

1.
Center of Laser Processing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084

Received Date: 2002-05-27

Abstract

Fe-based composite layers reinforced by in situ ZrC particles were formed by laser overlapping and single cladding using preplaced FeCSiB alloy powders on a medium carbon steel matrix. The morphologies,microstructures,interface structure and the distribution of the ZrC particles in the clad layers were observed with optical microscopy,field emission electric scanning microscopy (FEEM). The microstructure of ZrC-reinforced Fe-based composite layers is the typical γ austenite dendrite and cellular distributed on the eutectic substrate. The energy dispersive spectroscopy (EDS) analysis shows the reinforcements are in situ synthesis carbides which main compositions consist of transition elements Zr,Mo and carbon. The compound carbide particles distributed within dendrite and interdendritic regions with 1.96%,2.2%～3.84% volume fractions for single and overlapping layers respectively. The martensite transformation went with the rapid cooling processes also. The Fe-based composite layers are dense and free of cracks with a good metallurgical bonding between the layer and substrate. The microhardness values across layer cross section vary between 800HV0.2～1100HV0.2.
- laser cladding,
- metallurgical bonding,
- hypoeutectic,
- compound carbide

References

[1]	Gassmann R C.Mater Sci Technol,1996,12(8):691～696.
[2]	Baker T N,Xin H,Hu C.Mater Sci Technol,1994,10 (6):536～544.
[3]	Hui X D,Yang Y S. J Mater Sci Lett,2000,19(14):1281～1283.
[4]	方岱宇.复合材料学报,2000,17(2):1～7.
[5]	Tjong S C,Ma Z Y.Mater Sci Engng,2000,29:49～113.
[6]	Meng Y,Hu H Q.J Materials Science,1996,31(16):4303～4306.
[7]	谭文,刘文今,贾俊红.金属热处理,1997,21(1):58～63.
[8]	Pei Y T,de Hosson J T M.Acta Mater,2000,48(10):2617～2624.
[9]	查莹,周昌炽,唐西南 et al.中国激光,1999,A26(10):947～950.
[10]	Shi G,Liu J,Ding P et al.Mater Sci Technol,1998,14:80～84.
[11]	陈传忠,王文中,曹怀华 et al.中国激光,1999,A26(9):841～846.
[12]	裴宇韬,孟庆昌,欧阳家虎 et al.中国激光,1995,A22(12):935～938.
[13]	刘宁,田春艳,舒士明 et al.硅酸盐学报,1998,26(2):200～216.
[14]	章守华主编.合金钢.北京:冶金出版社,1981:4～8.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Microstructure and properties of Zr/FeCSiB layers produced by laser cladding

1. Center of Laser Processing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084

Received Date: 2002-05-27
Available Online: 2003-03-25

Abstract: Fe-based composite layers reinforced by in situ ZrC particles were formed by laser overlapping and single cladding using preplaced FeCSiB alloy powders on a medium carbon steel matrix. The morphologies,microstructures,interface structure and the distribution of the ZrC particles in the clad layers were observed with optical microscopy,field emission electric scanning microscopy (FEEM). The microstructure of ZrC-reinforced Fe-based composite layers is the typical γ austenite dendrite and cellular distributed on the eutectic substrate. The energy dispersive spectroscopy (EDS) analysis shows the reinforcements are in situ synthesis carbides which main compositions consist of transition elements Zr,Mo and carbon. The compound carbide particles distributed within dendrite and interdendritic regions with 1.96%,2.2%～3.84% volume fractions for single and overlapping layers respectively. The martensite transformation went with the rapid cooling processes also. The Fe-based composite layers are dense and free of cracks with a good metallurgical bonding between the layer and substrate. The microhardness values across layer cross section vary between 800HV0.2～1100HV0.2.

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Reference (14)

[1]	Gassmann R C.Mater Sci Technol,1996,12(8):691～696.
[2]	Baker T N,Xin H,Hu C.Mater Sci Technol,1994,10 (6):536～544.
[3]	Hui X D,Yang Y S. J Mater Sci Lett,2000,19(14):1281～1283.
[4]	方岱宇.复合材料学报,2000,17(2):1～7.
[5]	Tjong S C,Ma Z Y.Mater Sci Engng,2000,29:49～113.
[6]	Meng Y,Hu H Q.J Materials Science,1996,31(16):4303～4306.
[7]	谭文,刘文今,贾俊红.金属热处理,1997,21(1):58～63.
[8]	Pei Y T,de Hosson J T M.Acta Mater,2000,48(10):2617～2624.
[9]	查莹,周昌炽,唐西南 et al.中国激光,1999,A26(10):947～950.
[10]	Shi G,Liu J,Ding P et al.Mater Sci Technol,1998,14:80～84.
[11]	陈传忠,王文中,曹怀华 et al.中国激光,1999,A26(9):841～846.
[12]	裴宇韬,孟庆昌,欧阳家虎 et al.中国激光,1995,A22(12):935～938.
[13]	刘宁,田春艳,舒士明 et al.硅酸盐学报,1998,26(2):200～216.
[14]	章守华主编.合金钢.北京:冶金出版社,1981:4～8.

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Microstructure and properties of Zr/FeCSiB layers produced by laser cladding

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通讯作者: 陈斌, bchen63@163.com

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