This article describes the problems involved in modelling material cracking in skew rolling processes. The use of the popular damage criteria is impossible because of the lack of a calibration test that would make it possible to determine the critical value of material damage under conditions similar to those found in skew rolling. To fill this gap, a test called channel-die rotational compression was proposed. It consisted of rolling a disk-shaped specimen in a cavity created by two channels of cooperating tools (flat dies), which had heights smaller than the diameter of the specimen. When the rolling path was sufficiently long, a crack formed in the axial zone of the specimen. In this test, modelling using the finite element method made it possible to determine the critical values of material damage. As an illustration, the test was used to determine the critical damage value when conducting a rotational compression process on 50HS steel (1.5026) specimens formed in the temperature range of 950–1200 °C. The analysis was conducted using the Cockcroft–Latham damage criterion.

本文介绍了斜轧过程中材料开裂建模中涉及的问题。由于缺乏校准测试，因此无法使用普遍的损坏标准，因为校准测试可以在与斜轧相似的条件下确定材料损坏的临界值。为了填补这一空白，提出了一种称为通道模旋转压缩的测试。它包括在一个由两个协作工具（平模）通道形成的腔中滚动一个盘状样本，该工具的高度小于样本的直径。当滚动路径足够长时，在试样的轴向区域中形成裂纹。在该测试中，使用有限元方法进行建模可以确定材料破坏的临界值。举例来说，该测试用于确定在950–1200°C温度范围内形成的50HS钢（1.5026）试样上进行旋转压缩过程时的临界损伤值。使用Cockcroft-Latham损伤准则进行分析。