The use of rapid microstructure analysis for qualilty assurance and process optimization in the wire manufacturing

为了质量控制的目的，在DFG -优先程序1204中开发了一种快速显微结构分析（SMA）方法。在棒材生产的连续工艺链上对选定的钢种进行了试验。首先，该方法在实验室规模上进行了测试。该方法基于x射线衍射图（XRD）分析。在此基础上，将变形状态与SMA、光学显微镜和力学试验结果一起存储在数据库中并进行关联。在这些数据库的基础上，对给定材料的微观结构特征和SMA之间的快速关联是可能的。转让项目的目标是在实际应用中验证所开发的方法，并进一步发展与工业需求有关的方法。此外，计划进一步扩展sma -属性-微观结构-相关性数据库，以更广泛地应用于实际相关材料。因此，计划研究的重点是具有更复杂组织的钢种及其在轧制、拉丝和弹簧生产整个工艺链中的发展。在sma数据库调查中开发的模型将是过程链内微观结构演变模拟的基础，也是质量管理任务检查或过程优化的工具。

For the purpose of quality control a fast method for microstructural analysis (SMA) was developed within the DFG - priority program 1204. The method developed was tested for selected steel grades using a continuous process chain for rod production. First the method was tested in a laboratory scale. The method is based on the analysis of X-ray diffraction pattern (XRD). Herein the deformation state together with the results of SMA, optical microscopy as well as mechanical tests were stored and correlated in a data base. On the basis of these data base a fast correlation between microstructure characteristics and SMA for a given material is possible.A verification of the developed method in practical application and a further development in relation to industrial requirements is the goal of the transfer project.Additional, a further extension of the data base of SMA-property-microstructure-correlations to a wider spectrum of practical relevant materials is planned.Therefore the focus of the planned investigations is on steel grades with a more complex microstructure and its development during the whole process chain of rolling, rod drawing and spring production.Models developed within the investigations in the SMA-data base will be the foundation for a simulation of the microstructure evolution within the process chain as well as a tool for the quality management tasks inspection or process optimization.