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所在平台: Udemy |
课程主页: https://www.udemy.com/course/ndt_magnetic_particle_testing/
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**课程名称：** 无损检测 - 磁粉检测 II 级 **课程概述：** 本课程将深入介绍磁粉检测（MPT），也称为磁粉探伤（MPI）。MPT/MPI 是一种基于磁性原理的无损检测方法。当磁化的铁磁材料出现不连续性时，会发生磁通泄漏，细小的铁粉颗粒在这些区域聚集形成可见的指示，从而识别出缺陷。MPT/MPI 因其快速的检测效率而成为最广泛使用的无损检测方法之一。 **主要学习内容：** * **磁粉检测原理：** 掌握磁粉检测的基本物理原理。 * **磁化电流类型：** 了解不同类型的磁化电流及其在检测中的应用。 * **磁粉检测设备：** 熟悉各种磁粉检测设备，并通过练习巩固。 * **退磁方法：** 学习并掌握有效的退磁技术。 * **磁粉介质：** 了解不同类型的磁粉介质及其特性。 * **磁粉检测技术：** 掌握各种磁粉检测技术，并通过练习熟练应用。 * **磁粉检测程序：** 学习规范的磁粉检测操作流程。 * **显示评价与验收标准：** 掌握如何评价检测显示并应用相应的验收标准。 * **限制因素回顾与练习：** 了解磁粉检测的局限性，并通过练习加以巩固。 **课程亮点：** * **高效快速：** MPT 是一种非常快速的检测方法。 * **操作简便：** MPI 的操作过程不复杂，所需技能水平要求不高。 * **适用性广：** 可快速检测大小、形状各异的工件。 * **即时结果：** 检测结果立即可见。 * **表面及亚表面缺陷识别：** 能够有效识别表面和一定深度（理想条件下可达 0.6 英寸）的缺陷。 * **便携性与现场检测：** MPI 设备通常便携，可进行现场或工作站检测。 * **成本效益高：** 相较于射线检测（RT）和超声波检测（UT），MPI 的检测成本较低。 **局限性：** * **材料限制：** 无法用于检测非铁磁性材料。 * **表面准备：** 大多数情况下需要清除涂层。 * **油漆涂层风险：** 检查涂漆工件时，可能产生烟雾引发火灾。 * **供电需求：** 磁化工件通常需要电源。 * **后续处理：** 检查后需要进行清洁和退磁。 **课程目标：** 成功完成本课程的学习后，学员将获得 II 级磁粉检测（MPT）资格，并通过相关考试获得认证。
Magnetic Particle Testing (MPT) is also known as Magnetic Particle Inspection (MPI). MPT / MPI is based on the principle of magnetism. Defects are identified as magnetic flux leakage occurs when there is a discontinuity in magnetized ferromagnetic material and fine iron particles sprinkled over specimens create cluster formation. MPT/MPI is the most widely used method as it is also known as the fastest method of NDT inspection.Magnetic Particle Testing is used to identify surface and subsurface defects. Defects in depth are inspected till 0.6-inch depth only (Under ideal condition). To inspect surface defects we use AC current and for subsurface defects, we use DC current. Surface preparation is not as critical as in DPT and it is also known as the planer testing method.Advantages of Magnetic Particle Testing-· Magnetic Particle Testing technique is a very fast method.· MPI requires a normal level of skill as its process is not very complicated.· Specimens of big and small sizes can be tested quickly, whether they have a simple or complex shape.· The immediate result is observed in MPI as it is quick and fast.· Surface and sub-surface defects can easily be identified using the MPT method.· MPI is portable for many parts and can be performed on-site or workstation.· The cost of inspection using MPI is very low as compared to RT & UT.Disadvantages of Magnetic Particle Testing-· It cannot be used to inspect nonferromagnetic materials.· Before inspection removal of paint is required in most of cases.· In case painted parts get inspected, fumes may cause a fire.· Electric supply is required in most of the cases for the magnetizing object. Post cleaning & demagnetization is important.NDT Level II Magnetic Particle Testing (MPT) Syllabus· Principle of Magnetic Particle Testing· Principle of Magnetic Particle Testing· Type of Magnetizing Current· Magnetic Particle Testing Equipment Review and Exercises· Method of De-Magnetization· Magnetic Particle Medium· Magnetic Particle Testing Techniques Review and Exercises· Magnetic Particle Testing Procedures· Evaluation of Indications and Acceptance Standards· Limitation Review and ExercisesAfter successful completion of training, participants will be appearing for the Level II exam.Participants will be certified as NDT MPT Level II after successfully clearing the exam.
