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采用 1.2 mm厚的 15F热轧板为母带 ,以奥氏体不锈钢 1Cr18Ni9作为覆层材料 ,在实验室条件下研究了反向凝固法生产复合奥氏体不锈钢薄带的可行性。实验表明 ,随着母带在钢液中浸渍时间的增加 ,新相层的生长经历“快速生长”、“平衡相持”和“迅速回熔”阶段 ;新相层厚度随着钢液过热度的增加而近似线性地减少。此外 ,母带表面状态、母带在钢液中的浸渍时间及钢液过热度对铸带质量有显著影响 ,控制合适的工艺参数可以获得质量优良的铸带
The feasibility of producing reverse austenite stainless steel strip by reverse solidification was studied under the laboratory conditions by adopting a 1.2 mm thick 15F hot rolled plate as a master and an austenitic stainless steel 1Cr18Ni9 as a coating. Experiments show that with the increase of immersion time of the masterbatch in the molten steel, the growth of the new phase layer undergoes “rapid growth”, “equilibrium phase hold” and “rapid meltback”. The thickness of the new phase increases with the superheat of the molten steel Increase and decrease approximately linearly. In addition, the surface condition of the masterbatch, the impregnation time of the masterbatch in the molten steel and the superheat of the molten steel have a significant effect on the quality of the cast strip. Controlling the suitable process parameters can obtain good quality castings