吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (01): 68-73.

• paper • Previous Articles     Next Articles

Effect of technological parameters on quality of Q460 high-strength-steel internal thread formed by cold extrusion

MIAO Hong1, ZUO Dun-wen2, WANG Min2, ZHANG Rui-hong1, WANG Hong-feng2   

  1. 1. College of Mechanical Engineering,Yangzhou University, Yangzhou 225000,China;
    2. Mechanical Engineering Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016,China
  • Received:2010-11-11 Online:2012-01-01 Published:2012-01-01

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Abstract:

The process performance of cold extrusion of Q460 high-strength-steel internal thread was studied by experiments. The effects of hole-diameter, extrusion speed and number of extrusions on the quality of the thread, such as surface morphology, residual stress and micro hardness were analyzed. High quality internal thread was obtained by optimization of the technological parameters. Results show that the optimized technological parameters are as follows, the hole-diameter is in the range of 21.20 mm to 21.30 mm, the rotation speed of the machine tool is from 20 r/min to 40 r/min, one-step cold extrusion forming is the best technology rather than multi-step extrusion.

Key words: materials synthesis and processing technology, Q460 high-strength steel, internal thread processing, cold extrusion technique, residual stress, hardness

CLC Number: 

  • TG376.2


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