●Comprehensive use of 3 main advanced manufacturing technology of sintered
Nd-Fe-B combined with our own modifications:Double Alloying: Sub-alloy in big proportion，helpful in mixing with main alloy evenly. Strip- Casting: Inner circulating cooling water kept at 10℃±2℃ to have excellent crystallized ingot.
Hydrogen Decrepitating: This technology and equipment was developed and manufactured by ourselves. It has accurate temperature and pressure control to have ingot crush evenly and completely, and excellent anti-oxidizing.
●Multi-step compound milling
Multi-step compound milling is used to make sure small evenly distribution of smaller powder particles.Jet-milling is modified to keep Nitrogen in cooling so that the fine powder will not be get heated, and increase powder yield
●Powder Mixing
We have large powdering tank up to 1.2 ton to that magnet property will have conformance for one order.Powders are mixed 3 times to make sure the powders are even and conformance: One-hour mixing when anti-oxidizing agent add after Hydrogen crushing. Two-hour mixing when minute quantity of alloy elements added after primary grinding. Four-hour mixing after fine grinding.
●Large block shape magnet forming
Floating two-way mold pressing technologyThis technology will improve the density distribution within the magnet block so that no inner crack, small shape distortion resulting in less surface grinding.
Two-step forming
For extra large block magnet，two-step preformed processing is used to solve inner crack problem. The maximum one directional length could reach as long as 150mm.