Permanent magnets key technology items
Developed countries in urgent need of high temperature magnet, SmCo high temperature magnets reach 500 ° c, magnet energy accumulation exceed 9.5 mgoe, low temperature coefficient magnets reach more stable than 1/2 level of SmCo magnets (under the same magnetic performance conditions), belongs to international advanced level.
Project conquer 100 tonnage neodymium iron nitrogen magnetic powder production line key technologies, magnetic powder performance reach: intrinsic coercive force > 5koe; remanence 9-10kgs; Maximum magnetic energy product is 15-20mgoe, is in international leading level. Broke through n53 Ndfeb produced casting piece speed condensed type and n55 Ndfeb magnets ingredients core technology, high-grade sintering Ndfeb magnets n50~n53 series products reach batch production level. High grade product broke the developed countries market monopoly, has already been used in "shenzhou" number series spacecraft, satellites, and magnetic resonance imaging and voice coil actuator (VCM) and various high-tech products key components.
This project takes place intensive study to related materials and industrialization key technology, high performance permanent magnetic materials mechanism research breakthroughs. Aiming at speed coagulation thin composition segregation, innovation and development and put forward "speed process of combined with double alloy technology" theory and technology. Synthesis of more than ten new magnetic rare earth compounds, synthetic compounds smco7 - XMX (m = cu, ga), is expected to become the new permanent magnetic materials or high temperature magnets
Injecting isotropic binding NdFeB energy deposition reach 5-6mgoe; Injecting anisotropic binding samarium iron nitrogen energy deposition reach 8-9mgoe. Multivariate HDDR anisotropic Ndfeb magnetic powder and the property of the magnets are respectively: jr = 137 t, hc = 1260ka/m, (bh) Max = 39.86 mgoe and (bh) Max=19.2mgoe, hci=1191ka/m, br=0.949t. Study Ndfeb magnets ultrasonic electroless plating surface protection technology, can achieve wet-hot tests (85 ℃, 85% relative humidity) 1008 hours or more. The dark nickel plating/cu/bright nickel 3 layer composite coating, its corrosion resistance performance can be immersed 1203 hours in 5% solution without corrosion.
Project implementation promotes rare earth materials, high performance applicable products and related equipment industry large-scale development, building or rebuilt eight production line, increase production capacity of 5000 tons, capacity account for 70% of the world, the product also from originally low-standard promoted to high-grade, add value of 1 billion, the sales revenue by the original 20% rise to 40%. China has become the world's largest ndfeb magnets production base, the world's largest potential market, all provide ndfeb magnets rare earth permanent magnetic material research and development center.
Domestic and foreign projects got 7 invention patent. "Clearance atomic effect and new magnetic materials research" gains second prize of national natural science, the project has also won Beijing science and technology progress first prize and metallurgical science and technology second prize. Technical achievement transfer 3 items. In domestic and foreign journals publish 50 pieces, retrieval 30 pieces by sci, ei, published one monograph. The implementation of projects have raised a high quality and stable development, production team.
