Production of Clad Steel Strips by Twin‐Roll Strip Casting
Production of Clad Steel Strips by Twin‐Roll Strip Casting
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DOI：
10.1002/adem.201500094
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发表时间：
2015-11
影响因子：
3.6
通讯作者：
M. Vidoni;R. Ackermann;S. Richter;G. Hirt
中科院分区：
文献类型：
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作者：
M. Vidoni;R. Ackermann;S. Richter;G. Hirt
本工作介绍了通过奥氏体不锈钢1.4301和碳钢1.1248组合的垂直双辊薄带连铸生产钢复合带的实验研究结果。该生产方法基于在铸辊之间引入固体带，在那里发生与凝固熔体的接合。这是第一次使用这种方法来联合收割机结合两种钢合金。与其他方法相比，如冷或热轧结合，它需要更短的生产路线，因为其中一种合金可以直接铸造。带材横截面的显微照片显示，本工作中采用的材料和层厚组合导致连接界面处实心带材的不均匀局部重熔。界面的显微外观不同于文献中报道的其他包覆工艺。23%的连接表面的特征在于波浪形界面，表明引入的固体带材的局部重熔。73%的连接表面呈现出平坦的界面。剩余的4%的表面被归类为连接缺陷。扩散发生在两种合金之间，其特征在于电子探针显微分析。对复合板进行了弯曲试验，并使用优化剪切表面的剪切试验来测量两种材料之间连接的机械阻力。接头的平均剪切阻力为218 MPa，标准偏差为29 MPa。
This work presents the results obtained from the experimental investigations performed on the production of steel clad strips by vertical twin‐roll strip casting with a combination of the austenitic stainless steel 1.4301 and the carbon steel 1.1248. This production method is based on the introduction of a solid strip between the casting rolls, where the joining with a solidifying melt takes place. For the first time this process is used to combine two steel alloys. In comparison to other methods such as cold or hot roll bonding it requires a shorter production route as one of the alloys can be directly cast. Micrographies of the strip cross‐section show that the material and layer thickness combination adopted in this work lead to a non‐uniform local remelting of the solid strip at the joining interface. The micrographic appearance of the interface differs from the one reported in the literature for other cladding processes. Twenty‐three percent of the joining surface is characterized by a wavy interface indicating a local remelting of the introduced solid strip. Seventy‐three percent of the joining surface exhibits a flat interface. The remaining four percent of the surface is classified as joining defect. Diffusion takes place between the two alloys and is characterized by electron probe microanalysis. Bending tests are performed on the clad strip and shear tests with an optimized shearing surface are used to measure the mechanical resistance of the joining between the two materials. The average shear resistance of the joining is 218 MPa with a standard deviation of 29 MPa.