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CSP流程下退火加熱制度對深沖板織構和性能的影響

Effects of heating process on the textures and properties of deep drawing steel sheets produced by CSP process

  • 摘要: 以包鋼CSP流程熱軋板為基料的SPCD冷軋板為試驗材料,采用單臺階和雙臺階兩種退火加熱制度進行實驗室試驗,對比分析了不同規程下的再結晶織構、組織和性能特點.結果表明,雙臺階退火工藝對應的γ織構、α織構上的111〈110〉成分均有所提高,但是雙臺階工藝下的Δr值偏大.分析認為,雙臺階和單臺階在回復階段上有所不同,不利取向組分形核受到了抑制,最終導致有利織構含量上的差別.在雙臺階工藝下,110〈110〉織構強度的提高導致Δr值偏大.

     

    Abstract: With cold-rolled strips(SPCD) under Baotou CSP line as experimental materials, two batch annealing processes, double-step annealing and single-step annealing, were applied by laboratory experiments.The characters of textures, microstructures and properties were studied under different annealing processes.The results indicate that the double-step annealing process enhances the intensity of γ-fiber and the 111〈110〉 of α-fiber, but the value of Δr increases, too.The difference of pre-recovery between the two annealing processes delays nucleation in the unfavorable regions, consequently leading to the difference of favorable textures.Upon the double-step annealing process, the high intensity of 110〈110〉 results in the higher value of Δr.

     

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