What I see missing is the "WHY". Is there a problem with your current HT oven?
Ok , let s first clear something about me ...So,
WHY ? Because , I don t want to spend my free time watching Tv or hanging on social network , I have no profile on any of them....poor me
So I spend part of my free time working on something that relax me ....except when I work on installing 300 HP Maserati V6 engine in small Honda for my son ...
Now , back to this MF of bomb
This vacuum HT ovens looks like atomic bomb
They need to heat and quench steel so they must be complicated .....But if we cut part which is important to us , what is left is simple heat treat oven just sealed to keep vacuum and gas inside oven ?
I think that i will keep FAN ..........
So I think that outside chamber is not necessary .We can save lot of gas this way . Normal HT oven with bricks , ONLY frame should be made little different.Stronger frame and make door sealed .Of course outlet for gas and vacuum , HT elements wire and TC wire sealed too .I don t see any problem to do that . We deal with LOW temperature in all that points so ...........
What i wonder is ......CAN furnace work only on vacuum without gas? How will TC measure in vacuum is question ?
vacuum pump , vacuum and gas pressure meter for gas is all I need extra..and some valve of course .
I decide to try this ...with small , very small furnace ...25 x 12 x 10 cm. Most time for stainless folder blade /I have some idea for folders lock / so i need small furnace to play with stainless steel . I will install FAN to i think .....that is good thing for heat uniformity. I will use only bricks for this and HT element only on top/roof. Inlet for vaccum/gas is best to be located from bottom side i think ?
To start with project I need some tool to precisely cut some bricks so after one hour work i come to this ......will serve to purpose