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在反向凝固与高温轧制过程中 ,母带与凝固层间一直进行着互扩散 ,C元素靠反应扩散由母带扩散到凝固层 ,Cr由凝固层扩散到母带 ,母带与凝固层之间存在明显的扩散层。Cr在母带中的扩散厚度约为 13μ。扩散到母带中的Cr和母带中的Fe形成固溶体 ,并析出Cr的碳化物。母带与凝固层界面实现了冶金结合
In the process of reverse solidification and high temperature rolling, the masterbatch and the solidified layer have been interdiffusion all the time. The reaction of C element spreads from the masterbatch to the solidified layer, and Cr diffuses from the solidified layer to the masterbatch, masterbatch and solidified layer There is a clear diffusion layer between. The diffusion thickness of Cr in the master tape is about 13μ. Cr diffused into the mother band and Fe in the mother band form a solid solution, and carbides of Cr are precipitated. Metallurgical bonding is achieved with the masterbatch and the solidified layer interface