Looking for reference for the annealing schedule for Nitronic 50 which minimizes permeability. I've seen 1950F to 2050F for 1 hour in vacuum but no cooling rate is specified (I suspect rapid cooling or water quench but I can't verify this). Does anyone have know of a more definitive reference...
MagBen,
Thank you for your advise. As I review the HT instructions for soft magnetic materials I think I am gaining an understanding of the process. The HT at 1180C (1177C upon further review) is an anneal/stress relief step and applied bias has no effect. The anneal is combined with dry H2...
The materials may include any of the common soft magnetic alloys; Ni-Fe 50, Fe-Co 50, 430FR SS or low carbon Fe (>99.8%). The application will be as a core for long (long is a relative term) cylindrical solenoid core. The heat treatment for Ni-Fe (50/50) will be something like 1180C / 6 hr...
Does anyone have recommended sources for low volume heat treatment of soft magnetic materials that would include magnetic bias during the thermal process schedule? The objects may be up to 5 feet in length.
MAGBEN, maybe HACKSAW is correct, perhaps my version of the problem statement is misleading. In simple terms (the only kind I can even hope to master) I am developing a linear electromagnet (a solenoid around a rod core). The purpose of the electromagnet is to produce a magnetic dipole moment...
I guess that there are not many simple answers. Maybe I'm looking at the problem all wrong. I am developing a solenoid to produce a dipole moment that will result in a torque when immersed in an external field. A saturable ferromagnetic core is used to minimize the power required to develop...
MagBen - Very interesting but this is at the pain threshold for my brain. So if I understand the spin rotation effect, the rod would be annealed while exposed to a transverse magnetic field (not sure how I would do this but lets move on). This would effectively magnetize the rod in the...
EDStainless - Thank you for your assistance. I would like high Bs (don't laugh), low Br and high permeability (in order of importance). This usually results in a material that also has low Hc. The application is for an electromagnet than may be operated in the linear region (dipole moment...
Does anyone know what alloys / heat treatment would be good candidates for a solenoid core that is required to have very low residual magnetism (Br), high permeability and high saturation flux density (Bm)? The form of the core will be a long thin rod. The squareness (Br/Bm) is a good...
