
【国外标准】 Standard Practice for Electromagnetic (Eddy Current/Magnetic Induction) Sorting of Ferrous Metals
本网站 发布时间:
2024-02-28
开通会员免费在线看70000余条国内标准,赠送文本下载次数,单本最低仅合13.3元!还可享标准出版进度查询、定制跟踪推送、标准查新等超多特权!  
查看详情>>

适用范围:
5.1 Absolute and comparative methods provide a means for sorting large quantities of ferrous parts of stock with regard to composition, condition, structure, or processing, or a combination thereof.5.2 The comparative or two-coil method is used when high-sensitivity testing is required. The advantage of this method is that it almost completely suppresses all internal or external disturbances such as temperature variations or stray magnetic fields, provided both the coils and both the reference parts are exposed to the same conditions which are not of relevance.5.3 The ability to accomplish satisfactorily these types of separations is dependent upon the relation of the magnetic characteristics of the ferromagnetic parts to their physical condition.5.4 These methods may be used for high-speed sorting in a fully automated setup where the speed of testing may approach ten specimens per second depending on their size and shape.5.5 The success of sorting ferromagnetic material depends mainly on the proper selection of magnetic field strength and frequency of signal in the test coil, fill factor, and variables present in the sample.5.6 The degree of accuracy of a sort will be affected greatly by the coupling between the test coil field and the test specimen and the accuracy with which the specimen is held in the test coil field during the measuring period. Testing with harmonics can, to a large extent, reduce the sensitivity to accuracy of location.5.7 When high currents are used in the test coil, a means should be provided to maintain a constant temperature of the reference standard in order to minimize measurement drift.1.1 This practice covers the procedure for sorting ferrous metals using the electromagnetic (eddy current/magnetic induction) method. The procedure relates to instruments using absolute or comparator-type coils for distinguishing variations in mass, shape, conductivity, permeability, and other variables such as hardness and alloy that affect the electromagnetic or magnetic properties of the material. The selection of reference standards to determine sorting feasibility and to establish standards is also included.21.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
标准号:
ASTM E566-19
标准名称:
Standard Practice for Electromagnetic (Eddy Current/Magnetic Induction) Sorting of Ferrous Metals
英文名称:
Standard Practice for Electromagnetic (Eddy Current/Magnetic Induction) Sorting of Ferrous Metals标准状态:
Active-
发布日期:
-
实施日期:
出版语种:
- 推荐标准
- ASTM F3016/F3016M-19 Standard Test Method for Surrogate Testing of Vehicle Impact Protective Devices at Low Speeds
- ASTM F3019/F3019M-19 Standard Specification for Chromium Free Zinc-Flake Composite, with or without Integral Lubricant, Corrosion Protective Coatings for Fasteners
- ASTM F302-09(2021) Standard Practice for Field Sampling of Aerospace Fluids in Containers
- ASTM F3021-17 Standard Specification for Universal Design of Fitness Equipment for Inclusive Use by Persons with Functional Limitations and Impairments
- ASTM F3022-16e1 Standard Test Method for Evaluating the Universal Design of Fitness Equipment for Inclusive Use by Persons with Functional Limitations and Impairments
- ASTM F3023-18 Standard Test Methods for Evaluating Design and Performance Characteristics of Stationary Upright and Recumbent Exercise Bicycles and Upper and Total Body Ergometers
- ASTM F3026-14(2019) Standard Guide for Helicopter Inland Search and Rescue (SAR) Crew Chief
- ASTM F3027-18 Standard Guide for Training of Personnel Operating in Mountainous Terrain (Mountain Endorsement)
- ASTM F3033-16(2021) Standard Practice for Installation of a Single-Sized, Cured-In-Place Liner Utilizing an Inflatable Bladder for Resurfacing Manhole Walls of Various Shapes and Sizes
- ASTM F3034-21 Standard Specification for Billets made by Winding Molten Extruded Stress-Rated High Density Polyethylene (HDPE)
- ASTM F3035-22 Standard Practice for Production Acceptance in the Manufacture of a Fixed Wing Light Sport Aircraft
- ASTM F3036-21 Standard Guide for Testing Absorbable Stents
- ASTM F3038-21 Standard Test Method for Timed Evaluation of Forced-Entry-Resistant Systems
- ASTM F3043-15 Standard Specification for “Twist Off” Type Tension Control Structural Bolt/Nut/Washer Assemblies, Alloy Steel, Heat Treated, 200 ksi Minimum Tensile Strength
- ASTM F3045-21 Standard Test Method for Evaluation of the Type and Viscoelastic Stability of Water-in-oil Mixtures Formed from Crude Oil and Petroleum Products Mixed with Water