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| Research on the bonding properties of Q345B cladding heavy steel plate |
| LI Wen-bin，YUAN Si-yu，LI Guang-long，FEI Jing |
| Iron and Steel Research Institute， Angang Group， Anshan 114009， Liaoning， China |
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Abstract In order to develop thick steel plate which is more than 150 mm thickness， the process which consists of the application of Q345B continuous casting slab with surface scarfing， vacuum welding and heat in chamber furnace， and the rolling by heavy steel plate mill was used to produce cladding heavy steel plate 200 mm in thickness. The bonding degree and mechanical properties were tested by flaw detection， tensile， shear and cold bending tests. Microstructure and the tensile fracture of heavy steel plate were analyzed by means of optical microscope and scanning electron microscope. Results show that the heavy steel plate produced by current process has good bonding properties and can satisfy the GB/T 7734—2004Ⅰdemand of flaw detection. Both the structure at bonding site and matrix structure are ferrite plus pearlite. The reduction on cross section in thickness direction reaches more than 35%.
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Received: 21 April 2015
Published: 29 October 2015
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2015, Vol. 50 
