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Experimental Investigation of Oxide Layer Formation Depending on Temperature Holding Time during Inductive Heating of Annealed 16MnCr5

机译:氧化物层形成根据温度持续时间的氧化物层形成,其诱导升温时间为16MnCr5

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摘要

Fine blanking is a highly productive process of industrial mass production of high quality components in particular for the automotive industry. The manufacturing process faces a limit at elevated tensile strengths of the materials to be processed. Consequently, high-strength steels can currently only be fine blanked to a limited extent. This can be overcome by lowering the flow stress of high-strength steels by means of inductive heating. Heating a steel sheet which is not self-passivating creates an oxide layer on the sheet surface. An oxide layer can affect a subsequent fine blanking process by changing the material properties of the processed steel sheet. In order to avoid this, the process could be carried out under protective gas atmosphere. However, to reduce cost, it would be preferable to perform the process without a protective gas atmosphere. It is thus necessary to investigate the oxide layer formation of steel sheets depending on temperature holding time during inductive heating of steel sheets prior to fine blanking. This was done for soft-annealed 16MnCr5 steel sheets using material characterization methods as well as SEM and EDX. The dependence of the oxide layer formation on the temperature holding time could be determined. In addition, the resulting oxide layer was characterized with regard to its manifestation and physical properties.
机译:精致的消隐是高质量组件的高制生产过程,特别是汽车行业。制造过程面向待加工材料的升高的拉伸强度的极限。因此,高强度钢目前只能在有限的范围内罚款。通过电感加热降低高强度钢的流量应力,可以克服这一点。加热不自钝化的钢板在片材表面上产生氧化物层。通过改变加工钢板的材料特性,氧化物层可以影响随后的细小消隐工艺。为了避免这种情况,该过程可以在保护气体气氛下进行。然而,为了降低成本,优选的是在没有保护气体气氛的情况下进行过程。因此,需要根据钢板在微小消隐前的电感加热期间的温度保持时间来研究钢板的氧化物层形成。这是针对软退火的16MnCr5钢板使用材料表征方法以及SEM和EDX来完成。可以确定氧化物层形成对温度保持时间的依赖性。另外,所得氧化物层的特征在于其表现和物理性质。

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