One
Banned
I’ve wondered whether or not there might be more to the edge quench than what’s been stated and if traditionally it might actually have been more about edge quality and geometry than the whole 90 degree bend thing.
Heat treating a triangular or wedge shaped cross section is much different than heat treating a rectangular cross section, much more complicated and problematic because of the “temperature gradient“. So much so, that it is often actually considered a design flaw which should be avoided or at the very least dealt with. The problem is that there are different heating and cooling rates, differences in expansion and contraction etc., between the edge and the spine. In essence the whole edge is a stress riser.
Perhaps the edge quench is one way of dealing with this problem. Maybe it allows for higher quench speeds without as much possibility of cracking and minimal stock reduction post heat treat.
It talks about design influences on heat treating in this article.
http://books.google.com/books?id=SX... part geometry on heat treating steel&f=false
Any thoughts?
Heat treating a triangular or wedge shaped cross section is much different than heat treating a rectangular cross section, much more complicated and problematic because of the “temperature gradient“. So much so, that it is often actually considered a design flaw which should be avoided or at the very least dealt with. The problem is that there are different heating and cooling rates, differences in expansion and contraction etc., between the edge and the spine. In essence the whole edge is a stress riser.
Perhaps the edge quench is one way of dealing with this problem. Maybe it allows for higher quench speeds without as much possibility of cracking and minimal stock reduction post heat treat.
It talks about design influences on heat treating in this article.
http://books.google.com/books?id=SX... part geometry on heat treating steel&f=false
Any thoughts?