Linear cutting fluid for neodymium-iron-boron permanent magnet material

Abstract

A linear cutting fluid for a neodymium-iron-boron permanent magnet material is characterized by comprising the compositions in percent by weight: 3%-9% of an aliphatic acid, 10%-15% of ethanolamine, 3%-6% of an amino boron phosphate, 5%-10% of a cleaning agent, 6%-9% of an antirust agent, 0.3%-1.0% of a hard water resistant agent, 0.3%-1.0% of an antifoaming agent and the balance water. The preparation method of the linear cutting fluid comprises: adding the aliphatic acid into a reaction kettle according to the amount of the formula, heating to 60-70 DEG C, adding ethanolamine with stirring, continuing to heat to 120-150 DEG C and reacting for 2 h, then cooling to 80 DEG C, successively adding the amino boron phosphate, the cleaning agent, the antirust agent, the antifoaming agent, the hard water resistant agent and water, and continuing to stir for 2 hours to obtain the finished product. The linear cutting fluid provided by the invention is low in cost, can realize long-acting antibiosis, belongs to environment-friendly product, is specially used in neodymium-iron-boron permanent magnet material processing technology, and has good cutting, cooling and rust resisting effects.

Description

technical field [0001] The invention relates to a water-based metal wire cutting fluid, in particular to a special wire cutting fluid for NdFeB permanent magnet materials and a preparation method thereof. Background technique [0002] NdFeB permanent magnet material is an alloy material made of rare earth metal powders such as neodymium, lanthanum, cerium and dysprosium, mixed with iron and boron powder, pressed and calcined, and has typical powder metallurgy characteristics. Due to the chemically active elements such as neodymium and boron contained in this type of material and the microporous metallurgical structure, the NdFeB permanent magnet permanent magnet material is more prone to corrosion than other metal materials. [0003] At present, in order to avoid corrosion, most domestic enterprises still use oil-based cutting fluid or emulsion as lubricating coolant in the NdFeB forming process. Generally, the main component of oil-based cutting fluid is kerosene or diesel...

AI Technical Summary

Problems solved by technology

[0009] The post-processing technology of NdFeB permanent magnet materials mainly includes slicing, grinding, hole drilling and wire cutting of specific shapes. Since NdFeB products themselves contain rare earth elements and metallurgical micropores, different metals are easy to form primary batteries and generate electricity. Chemical corrosion, general water-based metalworking fluids are difficult to meet the anti-rust requirements in its processing technology. From the above existing patents and technologies, the existing water-based metalworking fluids are mainly suitable for iron, aluminum, copper and other metals. For the forming and processing of alloys, the three cutting fluids listed above are mainly aimed at the lubrication and corrosion problems during the processing of NdFeB permanent magnet materials. The conductivity of the cutting fluid is not considered, and there is a lack of electrolyte substances in the cutting fluid. Poor electrical conductivity, small discharge gap is not conducive to cooling and chip removal of electric machining process, can not meet the requirements of wire cutting process of NdFeB permanent magnet materials, only suitable for slicing, grinding and drilling process of NdFeB permanent magnet materials

Images