According to the mechanism of crack formation of blooming, blooming process control method. By controlling the surface crack of slab to reduce the amount of finished steel crack scrap. Needs to be pointed out is the first step to control the composition of molten steel, which is the premise of quality control of blooming, especially n, Nb content control, Nb and carbonitride precipitation caused by grain boundary embrittlement and the brittle zone to the high temperature expansion, when the Nb content can reach 0.01% crack on a sharp increase in the.

    Xinhua Nanjing, May 13 (Xinhua) recently, Wuxi inspection and Quarantine Bureau in to a group from Japan imported complete sets of equipment to conduct on-site inspection and found that the airtight inspecting machine clip with pressure vessel and the highest rated pressure of 33Mpa, because manufacturers failed to provide AQSIQ issued by the pressure vessel of the people's Republic of China manufacturing license ", according to the relevant provisions of the special equipment management in China, the were destroyed.