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DING Weidong, LI Zhuoxin, LI Guodong. Performance study of high boron clad layer welded by PTA on hydraulic support piston rod surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 77-80. DOI: 10.12073/j.hjxb.20170418
Citation: DING Weidong, LI Zhuoxin, LI Guodong. Performance study of high boron clad layer welded by PTA on hydraulic support piston rod surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 77-80. DOI: 10.12073/j.hjxb.20170418
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Performance study of high boron clad layer welded by PTA on hydraulic support piston rod surface

  • College of Materials Science and Engineering, Beijing University of Technology, Beijing 100024, China

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  • Received Date: May 05, 2015
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  • In this paper, plasma transferred arc welding (PTA)is used to prepare high boron clad layer on hydraulic support piston rod surface. The microstructural, component distribution, phase constitution, microhardness, wear resistance and corrosion resistance are analyzed. The results show that four high boron clad layers is formed well and no cracking, microstructure homogeneity are found. With the increase of the boron content, the microhardness of clad layer increases gradually with the maximum 440 HV20, and wear resistance increases first, then decreases. In salt spray test, No.1 and No.2 clad layers don't have corrosion points after 480 hours, which shows the good corrosion resistance. Finally it is concluded that No.2 wire has high corrosion resistance which has well microhardness and wear resistance at the same time. It meets the demand of hydraulic support piston rod.
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