HD technology is China with foreign sintering neodymium nd-fe-b sintering process technology of boron chest iron.
1, neodymium iron boron hydrogen blasting technology called HD ( Hydrogen Decrepitation ) technology. Whether to use HD technology in China and abroad of sintered NdFeB sintered neodymium iron boron technology is one of the most important differences. Whether the strip technology, or double alloy technology recognized advanced technology is inseparable from the HD technology. HD technology is a high performance, high quality sintered neodymium iron boron preparation is an indispensable step.
An introduction to HD Technology
In 2, the so-called HD technology is cast or strip sheet with the treatment of H2( reaction at ambient temperature or about 200 oC, H2 pressure less than 0.3 MPa in general ), and then to 400~600oC dehydrogenation.
Hydrogen evolution reaction in two steps: first at the grain boundaries of Nd-rich phase were ( at room temperature can be ), and then at a certain temperature and the main phase of Nd2Fe14B reaction of [1,2], reaction temperature is 300 oC.
3, this equipment is mainly to the above purposes based on design and manufacture of an external heat type, rotary hydrogen reaction equipment.
1) in terms of security, taking up and SHIMADZU and NKE as basic design, with a gas operated safety interlocking system, including the disc, a pressure relief valve ( two), power failure automatic argon protection, hydrogen absorbing negative pressure automatic argon slow reaction. Heating dehydrogenation into the external heat type, with SHIMADZU and NKE design is not the same. Dynamic seal to the magnetic fluid seal technology, and NKE magnetic coupling technology. Cooling spray water cooling wind strong cold type.
2) charging using fast flange butt, neodymium iron boron material not in contact with air, charging and discharging are very simple and prevent the oxidation of material problem. Because of adopting the rotating, so complete, uniform suction, dehydrogenation.
Hydrogen broken furnace
