![]() |
my profile |
register |
faq |
search upload photo | donate | calendar |
|
|
#13 |
|
Twice a Lifer
Lifetime Forum Patron Join Date: Mar 2011
Location: Atop the highest hill in Schuyler County NY
Posts: 3,419
Thanks: 7,605
Thanked 2,672 Times in 1,403 Posts
|
That's right. Quenching is important during initial hardening, to cool quickly when the steel is hot enough to be non-magnetic. Ever notice when grinding on a shiny piece of metal that when it gets really hot, the same gradient in the pic emanates from the cut? The color is not much more, if any, than one molecule thick!
__________________
"... Liberty is the seed and soil, the air and light, the dew and rain of progress, love and joy."-- Robert Greene Ingersoll 1894 |
|
|
|
|
|