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为了获得更好的材料性能,需要对热处理工艺参数进行精确地优化。非线性超声无损检测技术是一种可以有效表征材料微观结构状态变化的评估方法,可以用来评估、优化热处理工艺参数。利用非线性超声波对热处理后的X-750合金材料进行评估,根据超声传播的非线性响应不同,对材料的性能变化做出判断,并与线性超声检测技术的评估结果进行了对比研究。研究发现经过热处理之后,材料性能显著提高,在其中传播的超声非线性响应则明显下降。材料经过热处理后性能提升越大,其声学非线性响应就会变得越小。根据超声波传播的非线性响应定性评估了3种不同的热处理工艺,明确了最优的镍基高温合金X-750退火工艺参数。研究证实了非线性超声方法的敏感度优于传统的线性超声评估方法,可以对材料的热处理效果进行无损评估,从而对热处理工艺参数进行优化与完善。
In order to obtain better material properties, heat treatment process parameters need to be precisely optimized. Non-linear ultrasonic non-destructive testing is an effective method to evaluate the microstructural changes of materials. It can be used to evaluate and optimize the parameters of heat treatment. The heat-treated X-750 alloy was evaluated by using nonlinear ultrasonic wave. According to the nonlinear response of ultrasonic propagation, the material properties were evaluated and compared with the linear ultrasonic testing. The study found that after heat treatment, the material properties significantly increased, in which the propagation of ultrasound nonlinear response was significantly decreased. Material after heat treatment, the greater the performance increase, the acoustic nonlinear response will become smaller. According to the nonlinear response of ultrasonic propagation, three different heat treatment processes were qualitatively evaluated, and the optimal annealing parameters of X-750 nickel-base superalloy were determined. The research confirms that the sensitivity of nonlinear ultrasonic method is superior to the traditional linear ultrasonic evaluation method, which can evaluate the heat treatment effect of the material non-destructively, and optimize and perfect the heat treatment process parameters.