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| Fracture Analysis on Weld of 23MnNiMoCr54 Steel Chain |
| ZHAO Ya-juan, TAO Tao, TIAN Li |
| Technology and Quality Department��Nanjing Iron and Steel Co., Ltd., Nanjing 210035,Jiangsu,China |
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Abstract 23MnNiMoCr54 chain steel fractured at the weld joints in using process, the fracture phenomenon was analyzed in detail. By using spectrometer, oxygen nitrogen analyzer, scanning electron microscope and electron probe instrument, the samples were observed. The results show that the chemical composition, morphology at low magnifications, hardness can meet the national standard requirements, the reason for fracture at weld seam is that the foreign Cu leads to weakness of grain boundaries, and the grain boundary strength decrease sharply, thus fracture happens. So the welding process should be strictly controlled to improve the quality of weld seam.
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Received: 17 October 2013
Published: 27 June 2014
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Corresponding Authors:
Ya-Juan
E-mail: zhaoyajuan80@126.com
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2014, Vol. 32 
