Process Specification for Powder Metallurgy Component Fabrication to Targeted Features and Quality: An Inverse Problem

9813207德国这项研究将涉及粉末冶金工艺及其在从汽车到电动工具等应用的工程型材制造中的应用。这项研究将确定计算机设计工具所需的特征，选择粉末和合金，并将压实的金属粉末加工成高性能结构，从而避免昂贵的加工步骤。为了完成这项任务，研究计划包括三个主要任务的集成：(1)粉末冶金处理；(2)通过超声波方法进行密度和质量监测；(3)基于计算机的分析和设计。这将通过压实钢粉来确定与施加压力和后续热处理相关的尺寸和密度变化。通过使用诊断传感器和计算机分析的这些实验，制造过程中的梯度将被隔离。消除这些梯度将提高产品质量，提高精度，并降低生产和开发成本。这项研究将生成将工艺规则嵌入设计阶段的计算机程序，以提高工艺的经济性和产品质量。

9813207 German The research will involve powder metallurgy process and its use in the fabrication of engineering shapes for applications ranging from automobiles to power tools. This study will determine the features needed to computer design the tooling, select the powder and alloy, and process the compacted metal powders into high performance structures that avoid expensive machining steps. To accomplish this task, the research plan consists of the integration of three major tasks: (1) powder metallurgy processing; (2) density and quality monitoring via ultrasonic methods; and (3) computer-based analysis and design. This will be accomplished by the compaction of steel powders to determine the dimensional and density change associated with the applied pressure and subsequent heat treatments. Gradients in the fabrication processes will be isolated though these experiments using diagnostic sensors and computer analysis. The elimination of these gradients will improve product quality, improve precision, and lower production and development costs. This research will generate computer programs that embed process rules into the design phase to improve on the economies of the process and improve product quality.