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All clear. Thanks guys

495c, thanks, clear. But looking at the cooling rate of 0.9k/min (4c/secomd, right?) it can be really tricky. Or I miss something here again?

So, if the part will operate at the service temperature 20-30c I should proceed with the take out @ 490-500c for the best magnetics properties?

Please correct me if I'm wrong."Service temperature" is nothing else but operating temperature?

Hello. Please help me understand the detail about the "Take-out-temperature " of the soft magnetics 7904 material. I don't fully understand the therm "Service temperature" at figure 7&8 site 7 of the data sheet...

Hi guys, thanks a lot for tips and technical details I have to ask from the manufacturers. I hope I can find something close as described. Cheers!

Hello, I decided to buy furnace for small in house batches. I need it for Permalloy small thin parts (transformer laminations). By search I found several manufacturers, mainly from China and they offer relaivelly cheap options (from 3-5k$) but I'm not sure about parameters I have to define. Ok...

thanks @EdStainless. Yes, uncoated :( As I mentioned above, I'm not sure how fast should be the cooling from annealing temp to 593°C? Can I just switch off the heating and wait temp. to drop or I need some inert gas to speed the process? If I need to speed it up, what rate?

Hi guys, thanks for the tips. Since Im not sure about the amount of vacuum inside this little furnaces I presume that I have to find one locally and do the experiment. Unfortunatelly, parts I want to anneal are thin (0,2mm laminate) and I presume that I have to use Mgo powder to separate them...

Hi dgallup. I cant find technical details about this furnace, but I give this one as the example. There is a lot of other small (and affordable) dental furnaces on the market and i can choose the right one, but not sure which one? Also, if you know exact model please recommend. My application...

Hi MagBen, yes, Fe ni 78 or 80liek this 0.02 C, 0.50 Mn, 0.35 Si, 80.00 Ni, 4.20 Mo, Bal. Fe. As far i know dry H2 is recommended for the maximum permeability and to clean impurities, but I will be happy with the average results. This is from the manufacturer datasheet: "For maximum softness...

Hello. I need small quantity parts to be annealed and wonder can I use dental vacuum furnace? Something like this: https://www.ebay.co.uk/itm/BIODENT-Keramikofen-Typ-SYSTOMAT-M-Vakuumpumpe-9887-/232481417446 Most of them are capable to reach 1200c but I'm not sure are those furnaces good enough...

Thanks MagBen. It seems that I will have to search better for this kind of service. This requirements are not so usual in my region.

Thanks MagBen. Happy New Year. I understand that Endo gas will cause some magnetics degradation but unfortunately I have no appropriate HT service in my region. That's why I ask this dumb question. Of course, I can experiment and find it myself but this kind of material is not cheap enough to do...

Thanks EdStainless, I understand. I have no problem with thin oxide layer since the parts are transformer laminations but carburization is something else. I'm not sure is that going to affect magnetics properties of the final part???

Hi Edstainless. Endo gas composition is : H2 33%, Co23%, Co2 0,3%, Ch4 0,5%, H2O 0,6%, rest N2. Dew point is 0c. Btw, what are the disadvantages of the higher dew point than recommended (-50c)?

Hi guys. I wonder is it possible to use endothermic gas instead of hydrogen atmosphere for 80Ni soft magnetic materials heat treatment? Any disandvantages?

I can't help much but I can share my practical experience. I had a similar chalenge and my lams were ngt mgo coated so we used mg oxide powder to isolate the parts. The parts were placed carefully on the plate and they were not touching each other but we sanwiched them with mgo powder between. I...

Thanks Magben. I will try as you recommend.

Polite bump :) I know that my oxide coating question is off topic but please can you give me the advice regarding that? Of course, I can try to experiment but if you are familiar with process it will be great for me to save some material from possible damage. I need this thin oxide layer because...