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FENG Tao, YU Zhenqi, LIU Yonghua, LI Si, WANG Yinzhen. Microstructure and properties of joints of 600 MPa grade ultrafine grained steel obtained by friction welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(3): 85-88.
Citation: FENG Tao, YU Zhenqi, LIU Yonghua, LI Si, WANG Yinzhen. Microstructure and properties of joints of 600 MPa grade ultrafine grained steel obtained by friction welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(3): 85-88.
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Microstructure and properties of joints of 600 MPa grade ultrafine grained steel obtained by friction welding

  • 1.

    College of Mechanical & Electronic Engineering, China University of Petroleum, Qingdao 266580, China

  • 2.

    China Petroleum Pipeline Bureau Domestic Division, Langfang 065000, China

  • 3.

    Chinese Mechanical Engineering Society, Beijing 100048, China

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  • Received Date: January 24, 2014
    Graphical Abstract
    • Abstract
  • 13mm diameter bars of 600MPa grade ultra-fine grain steel were welded by friction welding. Experimental results show that ultra-fine grain steel has good weldability of friction welding when the friction welding process parameters were properly controlled. Ultra-fine grain steel friction welding joint was mainly composed of four zones: welding seam, thermo-mechanically affected zone (TMAZ), heat affected zone(HAZ) and base material. The grain size was about 9-11 μm in the HAZ, which was slightly larger than the one of the base metal. Mechanical properties results showed that joint strength of the ultrafine-grained steel friction welding was up to 715 MPa with 22% elongation and 68% contraction ratio of cross section, and impact toughness was about 98 J. Meanwhile typical ductile fracture was obtained for this kind of joint.
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    • References (6)
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