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RECENT RESEARCH TO IMPROVE WHEEL AND AXLE COMPOSITION, PROPERTIES AND DESIGNS

机译：最近的研究，改善车轮和轴组成，性能和设计

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This paper describes research efforts by a North American railroad wheel and axle manufacturer to improve steel chemistry, cleanliness, and properties for improved component service performance. The authors describe extensive work to improve steel cleanliness in the melting process. Also they review attempts to correlate ultrasonic testing data with microcleanliness test results, and detail subsequent work to determine steel cleanliness using the Advanced Steel Cleanliness Assessment Technique (ASCAT), which is being developed by a university and a supplier. Emphasis is placed on determining the type, number and size of discontinuities within the steel. Additionally, efforts to improve mechanical properties of microalloyed axles are reviewed along with microstructural details relevant to the work. The role of vanadium, molybdenum, aluminum, and other elements, on axle structure and properties is discussed. A new axle design, with significantly larger body diameter, is described and finite element analysis (FEA) results for the design are presented.
机译：本文介绍了北美铁轮和轴制造商的研究努力，以改善钢化学，清洁度和性能，以改善组件服务性能。作者描述了广泛的工作，以改善熔化过程中的钢制清洁。此外，他们还审查了将超声波检测数据与微型化测试结果相关联，并使用高级钢清洁度评估技术（ASCAT）进行详细的后续工作，以确定钢清洁度，该技术正在由大学和供应商开发。重点是确定钢内不连续性的类型，数量和大小。另外，改善微合金轴的机械性能的努力以及与工作相关的微观结构细节。讨论了钒，钼，铝和其他元件在轴结构和性能上的作用。描述了新的轴设计，具有明显较大的体直径，并提出了设计的有限元分析（FEA）结果。

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