...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Nondestructive Evaluation >Non-destructive Case Depth Determination by Means of Low-Frequency Barkhausen Noise Measurements
【24h】

Non-destructive Case Depth Determination by Means of Low-Frequency Barkhausen Noise Measurements

机译：通过低频布哈豪森噪声测量的非破坏性壳体深度测定

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The availability of a fast and reliable method for non-destructive case depth determination which can be used to directly monitor the quality of various heat treatment processes is of great interest. Conventionally hardened steel components are analyzed by means of depth-resolved microhardness measurements providing the case hardening depth (CHD) of the material. However, as a consequence of mechanical destruction, the investigated part cannot be used in its original state anymore and needs to be replaced by a twin part whose properties might be different. In this work, a new approach of non-destructive CHD determination based on Barkhausen noise analysis with an excitation frequency of 0.5Hz is described. The use of a low frequency allows to enhance the penetration depth of the external magnetic field and to reduce the eddy current damping of the filtered Barkhausen (BN) signal at the same time. In this way, simultaneous information about the hard case and the soft base material core is experimentally accessible. Various measurands derived from the detected BN signals are sensitive to the different magnetic properties of the case and the core. The so-obtained correlations with the measured CHD can be used for non-destructive CHD determination by means of appropriate calibration data. The investigated sample set consists of cylindrical parts of 18CrNiMo7-6 which were case-hardened and ground in order to provide graded CHD values up to 3.6mm. The sensitivity of the tested low-frequency method will be quantitatively demonstrated over the complete range of interest and its potential for industrial applications will be discussed.
机译：可用于非破坏性壳体深度测定的快速可靠方法，其可用于直接监测各种热处理过程的质量非常令人兴趣。通过深度分辨的微硬度测量来分析常规硬化的钢组分，其提供了材料的外壳硬化深度（CHD）。然而，由于机械破坏的结果，所调查的部分不能再使用它的原始状态，并且需要由一个性质可能不同的双部分取代。在这项工作中，描述了一种基于Barkhausen噪声分析的非破坏性CHD测定的新方法，其具有0.5Hz的激发频率。使用低频允许增强外部磁场的穿透深度，并同时降低过滤的Barkhausen（BN）信号的涡电流阻尼。以这种方式，有关硬壳和软基材料核心的同步信息是通过实验访问的。从检测到的BN信号导出的各种测量对于壳体和核心的不同磁性度敏感。通过适当的校准数据，可以使用与测量CHD的所获得的与测量CHD的相关性。调查的样品组由18crnimo7-6的圆柱形部分组成，其壳体硬化和研磨，以便提供高达3.6mm的渐变CHD值。在全面的兴趣范围内，将定量证明测试的低频方法的灵敏度，并将讨论其工业应用的潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号