pardal
Automotive
- Oct 17, 2001
- 444
My task to do is to generate a compression force between two plates when they rise it's temperature from ambient to 480°C
This 300 mm diameter round Sae 1010 plates 38 mm thick, will hold a stack of about 100 each Sae 1070 1mm thick to be flattened .
This, can be called sandwich, will be hold by a 40 mm round SAE 4140 threaded bar heat treated as a 12.9 grade bolt.
To build up a increasing compression , I intent to put a spacer over one plate and under the nut that will tighten all the array , this spacer shall be of a material with a different thermal expansion from the others components.
I thought on a aisi 304 hollow bar as it have a thermal exp coefficient about 17E-6 micro mm/meter/°c
and the carbon and alloy steel had about 10e-6 .
My concern is about the behavior of all this array at the 480 C temperature, it will be about 4 hour since this temp is reached.
The task to cope, is to avoid a loss on the compression, so all the 1070 plates are gathered side by side , so they will last flattened when this force is released, of course that it will happen after the eat treatement.
Any comment will be granted.
This 300 mm diameter round Sae 1010 plates 38 mm thick, will hold a stack of about 100 each Sae 1070 1mm thick to be flattened .
This, can be called sandwich, will be hold by a 40 mm round SAE 4140 threaded bar heat treated as a 12.9 grade bolt.
To build up a increasing compression , I intent to put a spacer over one plate and under the nut that will tighten all the array , this spacer shall be of a material with a different thermal expansion from the others components.
I thought on a aisi 304 hollow bar as it have a thermal exp coefficient about 17E-6 micro mm/meter/°c
and the carbon and alloy steel had about 10e-6 .
My concern is about the behavior of all this array at the 480 C temperature, it will be about 4 hour since this temp is reached.
The task to cope, is to avoid a loss on the compression, so all the 1070 plates are gathered side by side , so they will last flattened when this force is released, of course that it will happen after the eat treatement.
Any comment will be granted.
