SolusCast: Cracks in heavy model

[dcpattni]

Hello Everyone,

Sorry for delay....@M-Williams thank you i used cool water and will continue, check below images....i'm not 100% happy with casting special for door details what could be the problem?...
@ 775C 5 hours did vacuum flasks for almost 1 min then return in oven after 2 1/2 hours did casting @ 630C.

[dcpattni]

More images below

[dcpattni]

images below

[mongerdesigns]

Which investment are you using?

[dcpattni]

@ mongerdesigns- SRS cadcast investment.

[rsaldivar]

just by the looks of it , to me , it looks like not enough curing , but if you cured that as you posted , for like 8 hours , I would say it's not the cure , I don't know that investment you are using , I like optima , I do see I don't agree with you burnout cycle , one hour is not enough in my opinion

this is what I do
bench sit 3 hours min. , and when poss. overnight
3 hours at 350 F.
1.5 - 2 hours at 700 F
3 hours at 1450 F , these look thin , for heavy you should do more time
down to cast temp. of about 900 - 1000 F , should take about 1 - 1.5 hours to get there , these look thin , so I would cast at about 900 - 1000 because if they were a reg. halo ring for example I would use 700 - 800 to cast , for these you want the metal not to cool down going to where it need to get to , and a hotter flask will help with that

[dcpattni]

what i did as said early nothing to hid, door details is more important! (after print cleaning in warm soap water by using Ultrasonic, curing unit from Reify, curing already done 8 hours under water, remove supports again curing underwater 3hr & without water 2 hours).

40/100 with boric powder 2%.
after investment 5 hours bench sit.
burnout cycle
165c-1 Hour
550c- 1 hour
775c- 7 hours
630c- casting temp....Silver will melt @ 1020C hand pour.

[Jewelermdt]

Any wax you use on a resin model needs a way to melt out. If it's trapped in the investment, it will boil and can cause defects. I find getting fine detail to come out is to pain that area with investment before you pour and vacuum it. Plus have lots of feeds to it. Might also cast better tilted as much a possible so metal flowing over the design doesn't cause disturbance.
I also think your 550C needs to be at least 2 hours to give the wax more time to melt out.

[rsaldivar]

165 c should be 3 hours min. 4 if poss. , at one hour the crucible is still wet , it need to dry out
550 c should be 2 hours

[dcpattni]

Hi,

will try again SC resin same door after putting in flasks will share you image if need to change will do then cast...
@ Jewelermdt what do you mean by feeds (vibrating after pouring investment?).....tilted also i didn't understand can u give some picture....

cast burn out will do as per said
bench sit 5h
165C-3h
550C-2h
775C-7h
casting at 630C.