On Wed, 07 Jul 2004 14:18:41 GMT, Seppo Renfors
wrote:



Eric Stevens wrote:

On Tue, 06 Jul 2004 01:18:46 GMT, Seppo Renfors
wrote:



Eric Stevens wrote:

On Mon, 05 Jul 2004 00:46:51 GMT, Seppo Renfors
wrote:



Eric Stevens wrote:

On Sun, 04 Jul 2004 01:02:50 GMT, Seppo Renfors
wrote:



Eric Stevens wrote:

On Sat, 03 Jul 2004 07:38:25 GMT, Seppo Renfors
wrote:
[..]
Anything can be welded at virtually any temperature by using pressure.
The Mini Minor crown wheel for the diff started off as a steel disc
cut off from a round billet. This was placed on a mould at the end of
a hydraulic ram, and the other half of the mould was on another
hydraulic ram. To form the crown wheel they were slammed together
under huge pressure - it made a very nice crown wheel - and fast!


You are confusing forging with welding.

Actually I referred to neither. I referred to the use of pressure only
as "merely by pressure" was your point.

But I was discussing welding. You seem to be confusing cold forging
with welding.


No, it appears that there is an issue of splitting hairs into quarters
again. At what point is something "melted"? It appears that it has to
also need the "melted" + "a length of time" to qualify as such.

So if you want to go pick up one of those crown wheels, with your bare
hands immediately AFTER it is made - the same piece of metal you put
into the die BEFORE the event with your bare hand - well go for it,
you say it is "cold" after all!


As in so many other areas, your knowledge of metallurgy appears to be
unique.

So "unique" that you cannot find a hole in the arguments I put to you,
instead you find a need attack me personally not only on this but also
"in so many other areas" - your mere assertions amounts to nothing.
Remember the last time you resorted to something like this - can I
just mention "slide rule" to remind you, hmmm?

The question then was whether 43/7 equalled 18/3. I said it didn't.
You insisted it did. I think I abandoned that argument at the point
when you effectively resorted to arguing that 'approximately' is
identical to 'exactly'.

Apart from that, those forging blanks were NEVER hot enough to melt.
It was NOT NECESSARY that they be melted for them to be reformed. One
of the reasons for forging is to presever the original grain flow of
the lank and that would be lost if the blank was melted.



Eric Stevens