That's a good question about how long it has to wait between the two heat treat processes. There will be days or even weeks between the fitst cycle and the second.
Tolerance is not that critical. As long as we are within .005" we will have a superior product.
Thanks for the input.
The biggest problem is cost. There other processes that are better than what we are using but the cost goes up quite a bit.
The HIP and HT (after HIP) are 2 expenses we didn't expect to have. Of course they will reduce the profit margin. Down the road after we establish the improved...
Edstainless,
Thanks for the input, well thought out! I make several hundred a year of these.
The holes are deep in the casting and yes the HIP facility said the cooling rate is quite slow.
With the exception of the holes this program is going very well. I like your idea about welding the...
A billet prop is much more expensive than cast. A casting is about $300. A block of 15-5 billet, 16" x 16" x 10" would weigh about 720 lbs (it's been a while since I did the math) @ $5 per pound would cost about $3600. The casting is $300 + $140 for HIP.This is substantially less than billet...
These are boat propellers. 16.5" diameter. Since we machine them the blades are very thick, about 10 times thicker than a typical cast propeller. The foundry has made great advances with the casting process. We used to have holes about .25" diameter throughout the joint of the blade and the...
Thanks for the input.
The parts that are going through HIP now have already been through the solution treatment. I assume the HIP, since it is not a rapid cool down, will undo that?
Then do the 1900 for 1/2 hour, rough machine and then H900?
I was hoping to avoid the h1950 treatment but it...
Thanks for reading. I have a product I manufacture that is made of 15-5 stainless. Up until just recently the process was; casting, heat treat H1950, heat treat H900, then machine.
Due to casting issues we have deceided to have our product HIP'ed (hot isostatic pressure). I am wondering what...
