PROCESS FOR MANUFACTURING PERMANENT MAGNETS FROM NEODYMIUM-FERRUM-BORON ALLOY POWDER

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to manufacture u043fu043eu0441u0442u043eu00a0u043du043du044bu0445 magnets of neodymium - iron boron alloy powder, which u0438u0441u043fu043eu043bu044cu0437u0443u044eu0442u0441u00a0 and u043fu0440u0438u0431u043eu0441u0442u0440u043eu0435u043du0438u0438. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improving the mechanical properties of the u043fu043eu0441u0442u043eu00a0u043du043du044bu0445 magnets by u043fu043eu0432u044bu0448u0435u043du0438u00a0 limit strength of the curve. the proposed method includes pressing of powder in a magnetic field, sintering and magnetized magnets.in such u043fu0440u043eu0432u043eu0434u00a0u0442 further chemical treatment of powder in a solution containing tin chloride, g / l: 10 to 30; hypophosphite u043du0430u0442u0440u0438u00a0 10 - 25 u0442u00a0 - u043eu043cu043eu0447u0435u0432u0438u043du0430 30 - 100; wines u043du0430u00a0 acid 40 - 60. the ratio of the mass of powder and the volume of the solution u0441u043eu0441u0442u0430u0432u043bu00a0u0435u0442 80 - 200 g / l.the processing u043fu0440u043eu0432u043eu0434u00a0u0442 in 35 - 45 & deg; c for 1 - 2 minutes, receive magnets with residual by induction 1.02, 1.03 u0442u043b, u043au043eu044du0440u0446u0438u0442u0438u0432u043du043eu0439 force 888 - 920 ka / m and limit strength at 21.3 - curve 23.6 kg / u043cu043c5. 1, table 2).