Abstract

Propagation rates of ultrasound waves and Poisson coefficients in the rolled stock from 40Kh steel after various types and conditions of thermal treatment were studied. An unambiguous relationship of structural states and hardness with the rates of longitudinal, transversal, and Rayleigh waves and Poisson coefficients with the approximation coefficients of 0.83–0.99 was determined. The developed procedures of studies and special equipment, which implements a shadow–mirror technique of multiple reflections using contactless transmission and surface mount electromagnetic acoustic transducers, provide high exactness, reproducibility, and reliability of the acoustic structuroscopy methods.

中文翻译：

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棒形40Kh钢的热处理效果和结构状态对超声波速度和泊松系数的影响

摘要

研究了各种类型和条件的热处理后，40Kh钢在轧制件中超声波的传播速率和泊松系数。确定了结构状态和硬度与纵向波，横向波和瑞利波的比率以及具有近似系数0.83至0.99的泊松系数的明确关系。已开发的研究程序和专用设备，使用非接触式传输和表面安装电磁声换能器实现了多次反射的阴影镜技术，从而提供了声学结构检查方法的高度准确性，可重复性和可靠性。