Micro-Shear Properties of Welded Joints of ASTM4130 Steel

Abstract:

The effect of soaking time and temperature of post weld heat treatment on the micro-properties of the welded joints of ASTM4130 steel was investigated by using micro-shear test. The results show that micro-shear test can be adopted to evaluate the mechanical properties of uneven materials such as the welded joint. The micro-strength of the weld, fusion line and base metal is not obviously affected by the soaking time. The width and strength loss of the softened zone slightly decrease with increasing soaking time. The micro-shear strength of the weld firstly decreases and then significantly increases with increasing PWHT temperature. But the BM shows the opposite trend. The width and strength loss of the softened zone are not obviously affected by PWHT temperature. At PWHT temperature of 590 °C, the width of softened zone and the strength loss rate are the largest. In terms of hardness, width and degree of the softened and toughness, 640°C/165min PWHT is preferred.

• Periodical: Advanced Materials Research (Volumes 816-817)
• Pages: 70-74
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.816-817.70
• Online since: September 2013
• Authors: Qing Kun He, Chong Sun
• Keywords: ASTM4130, Micro-Shear Test, Welded Toint

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