Li Yuqian, Du Qiming, Mei Donggui, Cheng Huimei. Study on Production Technology and High Heat Input Welding Property of Q345 Grade Ti-oxide Metallurgy Steel[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(6): 155-161. doi: 10.7513/j.issn.1004-7638.2018.06.025
Citation:
Li Yuqian, Du Qiming, Mei Donggui, Cheng Huimei. Study on Production Technology and High Heat Input Welding Property of Q345 Grade Ti-oxide Metallurgy Steel[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(6): 155-161. doi: 10.7513/j.issn.1004-7638.2018.06.025
Li Yuqian, Du Qiming, Mei Donggui, Cheng Huimei. Study on Production Technology and High Heat Input Welding Property of Q345 Grade Ti-oxide Metallurgy Steel[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(6): 155-161. doi: 10.7513/j.issn.1004-7638.2018.06.025
Citation:
Li Yuqian, Du Qiming, Mei Donggui, Cheng Huimei. Study on Production Technology and High Heat Input Welding Property of Q345 Grade Ti-oxide Metallurgy Steel[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(6): 155-161. doi: 10.7513/j.issn.1004-7638.2018.06.025
Effects of Ti-oxide metallurgy and TMCP process on the matrix mechanical properties and high heat input welding property of Q345 grade steel plate were studied under industrial conditions.Microstructures and inclusion characteristics were analyzed by OM,SEM and EPMA.High heat input welding simulation and EGW experiments were carried out.Results indicated that the industrially produced steel plates obtained good matrix mechanical properties and high heat input welding property.Fine-sized inclusions containing Ti,Ca and Mg were distributed uniformly in steel,which promoted the formation of acicular ferrite structure in CGHAZ effectively.Impact toughness of the weld joint under 200 kJ/cm was improved significantly.
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