Study on the property of laser remelting high-carbon-high-alloy steel
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Received Date:
2002-06-19
Accepted Date:
2002-09-08
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Abstract
Laser remelting on the surface of Cr12 steel was performed with CO2 laser.The bending strength and wear resistance of Cr12 before and after laser surface remelting were compared.Fractorgraphy and TEM of microstructure in the remelting layer were studied by electron microscope.Austenitic distribution of the laser remelting layer as a function of distance from surface was measured with X-ray diffractometer.The experimental results show that super-refined microstructure is formed in the remelting layer.The bending strength and wear resistance are enhanced evidently.Plenty of dislocation cluster are found in the TEM of microstructure in the remelting layer after the bending strength and wear test.Super-refined microstructure,strain-induced martensite transformation in the retained austenite and formation of dislocation cluster are the important reasons to reinforce the bending strength and wear resistance.
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References
[1]
|
Rykalin N.Pergamon Press,1987,35(5):326~327. |
[2]
|
沈莲,李成劳.机械工程材料,1989,3(2):78~81.
|
[3]
|
刘江龙,谭继福.机械工程材料,1989,(5):11~14.
|
[4]
|
Pelletier J M,Pergue D,Fouquet F.Materials Science,1989,24(12):4343~4349. |
[5]
|
胡健东,李章.金属热处理学报,1990,11(2):19.
|
[6]
|
潘清跃,李延民.金属学报,1996,32(7):718.
|
[7]
|
朱企业.激光精密加工.北京:机械工业出版社,1994:199.
|
[8]
|
王家金.激光加工技术.北京:中国计量出版社,1992:186.
|
[9]
|
Granamuthu D S.ASM,Metals Park,1979,129(4):1~44. |
[10]
|
程荫芋,李柏武,张惠斌 et al.固体润滑,1986(2):65~74.
|
[11]
|
雷天同,赵鹏文,陈文福 et al.金属热处理,1984(7):13~18.
|
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Proportional views
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