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Progress and Challenges of Ultrasonic Testing for Stress in Remanufacturing Laser Cladding Coating

机译:再制造激光熔覆涂层应力超声测试的进展与挑战

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摘要

Stress in laser cladding coating is an important factor affecting the safe operation of remanufacturing components. Ultrasonic testing has become a popular approach in the nondestructive evaluation of stress, because it has the advantages of safety, nondestructiveness, and online detection. This paper provides a review of ultrasonic testing for stress in remanufacturing laser cladding coating. It summarizes the recent research outcomes on ultrasonic testing for stress, and analyzes the mechanism of ultrasonic testing for stress. Remanufacturing laser cladding coating shows typical anisotropic behaviors. The ultrasonic testing signal in laser cladding coating is influenced by many complex factors, such as microstructure, defect, temperature, and surface roughness, among others. At present, ultrasonic testing for stress in laser cladding coating can only be done roughly. This paper discusses the active mechanism of micro/macro factors in the reliability of stress measurement, as well as the impact of stress measurement on the quality and safety of remanufacturing components. Based on the discussion, this paper proposes strategies to nondestructively, rapidly, and accurately measure stress in remanufacturing laser cladding coating.
机译:激光熔覆涂层中的应力是影响再制造组件安全运行的重要因素。超声波测试已成为应力无损评估中的一种流行方法,因为它具有安全性,无损性和在线检测的优点。本文概述了再制造激光熔覆涂层中应力的超声测试。总结了超声应力测试的最新研究成果,并分析了超声应力测试的机理。再制造的激光熔覆涂层表现出典型的各向异性行为。激光熔覆涂层中的超声测试信号受许多复杂因素的影响,例如微观结构,缺陷,温度和表面粗糙度等。目前,只能对激光熔覆涂层中的应力进行超声波测试。本文讨论了微观/宏观因素在应力测量可靠性中的作用机理,以及应力测量对再制造零件质量和安全性的影响。在讨论的基础上,本文提出了无损,快速和准确地测量再制造激光熔覆涂层应力的策略。

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