优化镍基高温合金X-750热处理工艺参数的非线性超声无损评估方法

发布时间：2018-07-28 09:49

【摘要】：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。
[Abstract]:In order to obtain better material properties, heat treatment process parameters need to be optimized accurately. Non-linear ultrasonic nondestructive testing (NDT) is an effective method to characterize the microstructure of materials. It can be used to evaluate and optimize the heat treatment process parameters. The X-750 alloy material after heat treatment was evaluated by nonlinear ultrasonic wave. According to the nonlinear response of ultrasonic propagation, the performance changes of the material were judged and compared with the evaluation results of linear ultrasonic testing technique. It is found that after heat treatment, the properties of the materials are improved significantly, and the ultrasonic nonlinear response propagating in the materials decreases obviously. The larger the performance of the material after heat treatment, the smaller the acoustic nonlinear response. According to the nonlinear response of ultrasonic propagation, three different heat treatment processes were evaluated qualitatively, and the optimal annealing parameters of nickel-based superalloy X-750 were determined. It is proved that the sensitivity of the nonlinear ultrasonic method is better than that of the traditional linear ultrasonic evaluation method, which can be used to evaluate the heat treatment effect of the material and optimize and perfect the heat treatment process parameters.
【作者单位】：厦门大学航空系;
【基金】：国家自然科学基金(51405405) 中央高校基本科研业务费专项资金(20720140511)~~
【分类号】：TG115.285;TG156

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