Improvement of smelting process of Q345B steel for flaw detection delivery
The Q345B steel produced by Steelmaking Plant of Wuhan Iron & Steel Group Echeng Iron & Steel Co.,Ltd.was flaw detected before delivery,and the qualification rate was only 40 ％.The metallographic analysis and energy spectrum analysis of inclusions were carried out with the flawdetection unqualified Q345B plates.The results showed that titanium compounds,alumina inclusions,manganese sulfide and hydrogen were main factors which caused the flaw detection unqualified.The production process of the steel Q345B was improved comprehensively.The qualification rate of the steel Q345B came up to over 91％ using converter-slab continuous casting-slab hot direct charging production process.It was realized to smelt the flaw detection steel through the low-cost process.
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NSTL
万方数据
维普
