T/CSRE 6001-2024 Sintered NdFeB Permanent Magnet Alloy Powder Flowability Test Method Part 1: Determination of Flow Rate

Scope

Main Technical Content: Method for Testing the Fluidity of Sintered Neodymium-Iron-Boron Permanent Magnet Alloy Powder Part 1: Determination of Flow Velocity 1 Scope This document describes the method for determining the flow velocity of sintered neodymium-iron-boron permanent magnet alloy powder. It is applicable to the determination of the flow velocity of sintered neodymium-iron-boron permanent magnet alloy powder, with a particle size range of (1.5~50.0) μm. 2 Normative References This document does not specify any normative references. 3 Terms and Definitions There are no terms or definitions requiring definition in this document. 4 Method Summary Measure the time required for 100g of sintered neodymium-iron-boron permanent magnet alloy powder to pass through a standard funnel of specified dimensions. 5 Technical Requirements Flow Velocity Measurement Device The schematic diagram of the flow velocity measurement device for sintered neodymium-iron-boron permanent magnet alloy powder and its main components are shown in Figure 1. Any instrument that can obtain the correct flow velocity based on the principle of flow velocity can be used. Main Components - Glove Box: The glove box should be filled with inert gas and equipped with an oxygen content testing and control system. The gas pressure is set to (100~400) Pa, and the temperature is (20~23) °C. The glove box should have a transition compartment to transfer materials. - Baffle Box: The baffle box is used to place the measurement system to avoid being affected by external airflow and should be easy to open or close. - Controller: Used to control the oxygen and water content in the glove box and the entire test system. - Feeding Spoon: Used to add sintered neodymium-iron-boron permanent magnet alloy powder to the sieve and the sieve with a high sleeve. - High Sleeve: Used to increase the height of the funnel to increase the amount of sintered neodymium-iron-boron permanent mag

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