公开(公告)号：US3862047A

公开(公告)日：1975-01-21

申请号：US24789372

申请日：1972-04-26

Applicant: GEN DYNAMICS CORP

Inventor： WELTMAN HENRY J ,  CARROLL MARK T ,  HALKIAS JOHN E ,  KAARLELA WILLIAM T ,  REYNOLDS JACK D

IPC: G01N27/84 ,  H01J1/28

CPC classification number: G01N27/84 ,  G01N15/0656

Abstract: A procedure for examining and inspecting drilled holes or other metal surface conformations by applying a castable, two component, magnetically active material comprised of room temperature vulcanizing rubber or a polymerizing material containing magnetizable particles and specific sensitizing agents, magnetizing the area to be inspected, and curing the castable material to form a permanent replica impression of the inspection area which, when removed, reveals the presence of surface flaws, such as cracks, scratches, tool marks or dimensional inaccuracies and subsurface flaws which may tend to develop in structurally deficient members.

Abstract translation: 通过应用由室温硫化橡胶或包含可磁化颗粒和特定敏化剂的聚合材料组成的可铸塑的两组分的磁性活性材料来磁化待检查的区域，以及用于检查和检查钻孔或其它金属表面构造的步骤 固化可浇铸材料以形成检查区域的永久复制印模，当被去除时，其可以揭示在结构缺陷的构件中可能趋于发展的表面缺陷，例如裂纹，划痕，工具痕迹或尺寸不准确性以及地下缺陷的存在。