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磁粉探伤中Betz环的近似理论

仲维畅

仲维畅. 磁粉探伤中Betz环的近似理论[J]. 无损检测, 2008, 30(12): 903-905.
引用本文: 仲维畅. 磁粉探伤中Betz环的近似理论[J]. 无损检测, 2008, 30(12): 903-905.
ZHONG Wei-Chang. Approximate Theories for Betzs Ring in Magnetic Particle Testing[J]. Nondestructive Testing, 2008, 30(12): 903-905.
Citation: ZHONG Wei-Chang. Approximate Theories for Betzs Ring in Magnetic Particle Testing[J]. Nondestructive Testing, 2008, 30(12): 903-905.

磁粉探伤中Betz环的近似理论

基金项目: 

国家自然科学基金资助项目(50371045后续)

详细信息
    作者简介:

    仲维畅(1937-),男,高级工程师,主要从事声振动和磁性无损检测工作及其基础理论的研究。

  • 中图分类号: TG115.27;TG115.28

Approximate Theories for Betzs Ring in Magnetic Particle Testing

  • 摘要: 简介了磁粉探伤中Betz环的两种近似理论,即等效(磁偶极矩、埋藏深度)近似和磁偶极子链近似。由磁偶极子链近似理论计算和画出了Betz环表面上显现出埋藏小孔磁痕的外加临界磁化电流与小孔数间的关系曲线,其中之一的趋势与实验曲线一致。同时证明了磁化电流无需饱和即可显现Betz环上12个孔。
    Abstract: Two types of approximate theories for Betzs ring in magnetic particle testing were briefly introduced, which were the approaching of equivalent magnetic dipole strengths and equivalent hole depths as well as the approaching of magnetic dipole chains. From the later, the characteristic curves between the number of small hole and the critical applied magnetizing current, by which the magnetic particle pattern of the buried hole were revealed on the ring circumference, were calculated and plotted. The tendency of one of these characteristics is identical with the experimental curves. And it was also proved that for the magnetizing electric current there is no need to reach saturation to reveal all twelve holes of Betzs ring.
  • [1] Betz C E. Principle of magnetic particle testing[M]. Chicago, Illinois, USA: Magnaflux Corporation,1967.
    [2] 美国无损检测学会,编.美国无损检测手册·磁粉卷[M].《美国无损检测手册》译审委员会,译.上海:世界图书出版公司,1994.
    [3] Swartzendruber L J. Magnetic leakage and force fields for artificial defects in magnetic particle test rings[C]. Proceedings of The Ⅻth Symposium on NDE. San Antonio, Texas, USA: 1979:150-162.
    [4] 仲维畅.工具钢环形试件表面因其表面下人工孔而产生的漏磁场——磁粉探伤原理之三十二[CD]. 第九届全国无损检测新技术学术研讨会论文集.宁波:2004:116-120.
    [5] 仲维畅.磁偶极子链的横向排斥[J].无损检测,2003,25(9):454-457.
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出版历程
  • 收稿日期:  2007-04-24
  • 刊出日期:  2008-12-09

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