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第 39 卷 第 3 期                                                                       Vol. 39, No. 3
             2020 年 5 月                          Journal of Applied Acoustics                      May, 2020

             ⋄ 研究报告 ⋄



               P92钢焊接接头蠕变损伤的非线性超声检测研究




                                     黄桥生      1†   任德军     2   章亚林     1   刘胜利      2


                                            (1 国电科学技术研究院有限公司        武汉   430066)
                                             (2 国电长源电力股份有限公司        武汉  430066)

                摘要：为解决 P92 钢焊接接头蠕变损伤的无损检测问题，该文选用温度为 650 C、施加应力为 95 MPa 的加速
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                试验方法，制作不同蠕变时间的试样，对 P92 钢焊接接头进行蠕变性能试验。采用非线性超声波技术和金相检
                测对蠕变试样焊接接头各区域进行研究。结果表明：P92 钢焊接接头母材、热影响区以及焊缝区域的非线性超
                声二次谐波幅值在蠕变试验后都呈上升趋势，在热影响区中的增加速率要快于其在母材和焊缝中，P92 钢焊接
                接头热影响区非线性二次谐波参数的变化与蠕变损伤严重程度存在对应关系。该文为开展 P92 钢焊接接头蠕
                变损伤的无损检测工程应用打下了坚实的基础。
                关键词：P92；蠕变损伤；非线性超声；IV 型裂纹
                中图法分类号: TG44           文献标识码: A          文章编号: 1000-310X(2020)03-0366-06
                DOI: 10.11684/j.issn.1000-310X.2020.03.007



                Nonlinear ultrasonic detection of creep damage in welded joints of P92 steel



                             HUANG Qiaosheng   1  REN Dejun  2  ZHANG Yalin  1  LIU Shengli 2


                           (1  Guodian Science and Technology Research Institute Co., Ltd., Wuhan 430066, China)
                                    (2  Guodian Changyuan Power Co., Ltd., Wuhan 430066, China)
                 Abstract: In order to solve the problem of non-destructive testing of P92 steel welded joint creep damage,
                 in this paper, the creep properties of the P92 steel welded joint are tested by means of an accelerated test
                 method with a temperature of 650 C and a stress applied of 95 MPa. Nonlinear ultrasonic technology and
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                 metallographic testing were used to study the welding joint areas of creep samples. The results showed that the
                 secondary harmonic amplitude of the welding joint base, thermal influence area and weld area of the T/P92
                 steel welded joint showed an upward trend after the creep test. The increase rate of the second harmonic in the
                 thermal impact zone was faster than that in the parent and weld areas. The change of nonlinear parameters
                 in the thermal impact zone of the welded joint of P92 steel had a corresponding relationship with the creep
                 damage degree. This paper lays a solid foundation for developing the engineering application of P92 steel
                 welded joint creep damage detection.
                 Keywords: P92 steel; Creep damage; Nonlinear ultrasound; Type IV crack








             2019-07-18 收稿; 2019-11-28 定稿
             作者简介: 黄桥生 (1980– ), 男, 湖南衡东人, 硕士, 高级工程师, 研究方向: 电力设备无损检测。
             † 通信作者 E-mail: 63292537@qq.com
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