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Modelling of drawing and rolling of high carbon flat wires

机译：高碳扁线的拉伸和轧制建模

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In order to meet customer requirements, it is necessary to develop new flat wires with a high tensile strength and a high width/thickness ratio. These products are manufactured from wire rod. The first step is to draw the wire until we have the required mechanical properties and required surface area of the section. After this, the wire is rolled from a round to a rectangular section. During the flat rolling process it can be reduced by more than 50 percent. Then the wire is exposed to a high level of stress during this process. Modelling allows us to predetermine this stress level, taking into account the final dimensions and the mechanical properties, thus optimizing both rolling and drawing process. Forge2005 was used in order to simulate these processes. The aim of this study is to determine the value of residual stresses after drawing and so to optimise rolling. Indeed, the highest stress values are reached at this step of the process by changing the section of the wire from a round to a rectangular one. In order to evaluate the stress value accuracy for high strain levels, a behaviour law has been identified. This is a result of tensile tests carried out at each step of the drawing process. Finally, a multi-axial damage criterion was implemented using Forge2005. The optimisation of the rolling is directly linked to the minimization of this criterion.
机译：为了满足客户需求，有必要开发具有高抗拉强度和高宽度/厚度比的新型扁平线。这些产品由线材制造。第一步是拉丝，直到我们具有所需的机械性能和所需的截面表面积。此后，将金属丝从圆形部分卷成矩形部分。在扁平轧制过程中，可减少50％以上。然后，在此过程中，导线会承受很高的应力。通过建模，我们可以考虑最终尺寸和机械性能来预先确定此应力水平，从而优化轧制和拉伸过程。为了模拟这些过程，使用了Forge2005。这项研究的目的是确定拉拔后的残余应力值，从而优化轧制。实际上，在该过程的此步骤中，通过将导线的截面从圆形改变为矩形，可以达到最高应力值。为了评估高应变水平下的应力值准确性，已经确定了行为定律。这是在拉伸过程的每个步骤进行拉伸测试的结果。最后，使用Forge2005实现了多轴损伤准则。轧制的优化与该标准的最小化直接相关。

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