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Analysis of microstructure and property of welded joint on S355NL
hot rolled H-shaped steel with resistance to low temperature |
YANG Dong,LI Chao |
Laiwu Company, Shandong Iron and Steel Co., Ltd., Jinan 271104, China |
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Abstract SMAW welding process tests of S355NL European standard HE1000B large size hot rolled H-typed steel with resistance to low temperature were carried out. The microstructure and property of welded joint were tested and analyzed. The results showed that the tensile strength of welded joint of S355NL hot rolled H-typed steel was higher than 514 MPa. The average value of impact absorbing energy at -40 ℃ was more than 83 J. The hardness in heat affected zone was less than 209HV10. The microstructure was composed of ferrite, pearlite and granular bainite with different morphologies. All these properties could meet the requirements of the standard.
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Received: 06 July 2021
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