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为解决HP345焊瓶钢屈强比超标问题,在通钢FTSR生产线上,对影响屈强比的主要因素控轧控冷工艺进行试验研究。试验结果表明,提高终轧温度和卷取温度,层流冷却模式采取后段冷却,能够使HP345焊瓶钢的屈强比由最初的0.81降低至0.76,且各项力学性能满足国标GB 6653—2008要求。
In order to solve the problem that the yield ratio of HP345 welded steel bottle exceeds the standard, the key factors influencing the yield ratio are controlled experimentally and controlledly in the FTSR production line. The experimental results show that the increase of finish rolling temperature and coiling temperature and the adoption of post-stage cooling in laminar cooling mode can reduce the yield ratio of HP345 welded steel from 0.81 to 0.76 and the mechanical properties meet the requirements of GB 6653- 2008 requirements.