Notice only the edge is glowing. This is the Visayan Sea region of the Philippines. Only the edge gets hard, as typical. Interesting that he acheives this effect only through fire and steel handling without a heat sink (ala Japanese swords) or differential quench (ala N American tools). Interesting. Interesting that he quenches the blade from the side rather than the edge; more likely to cause warping, but then on a soft-bodied blade like these warps are easier to correct. Thanks for posting
it's amazing to me how the pandays in the philippines do this by eye. What a skill! Thanks for the video, you can really see how the blackmsith takes care to heat the blade properly before quenching. Particularly, how the blade colour changes slightly and how he works to homogenize that colour throughout the blade, which is what I assume is indicative of heat distribution on the blade.
@jim- no, water would harden but leaf springs are generally 5160 or something close to that which is an oil hardening steel, this means it has alloys which allow it to be hardened in a slower quench like oil. water would cool it too quickly and likely crack or warp unless great care is taken in normalizing. most cutlery steels are oil hardening steels nowadays.
Notice only the edge is glowing. This is the Visayan Sea region of the Philippines. Only the edge gets hard, as typical. Interesting that he acheives this effect only through fire and steel handling without a heat sink (ala Japanese swords) or differential quench (ala N American tools). Interesting. Interesting that he quenches the blade from the side rather than the edge; more likely to cause warping, but then on a soft-bodied blade like these warps are easier to correct. Thanks for posting
TOMHYLE88 1 month ago
this looks more like hardening than tempering
hathegkla 5 months ago
it's amazing to me how the pandays in the philippines do this by eye. What a skill! Thanks for the video, you can really see how the blackmsith takes care to heat the blade properly before quenching. Particularly, how the blade colour changes slightly and how he works to homogenize that colour throughout the blade, which is what I assume is indicative of heat distribution on the blade.
Tenkuu 10 months ago
@jim- no, water would harden but leaf springs are generally 5160 or something close to that which is an oil hardening steel, this means it has alloys which allow it to be hardened in a slower quench like oil. water would cool it too quickly and likely crack or warp unless great care is taken in normalizing. most cutlery steels are oil hardening steels nowadays.
savageknives1 1 year ago
What liquid did he use in the final process? Is it used oil or water?
linatusay 2 years ago
oil
Slic3R1 2 years ago
Sorry so long to comment... Yes... he used oil... Not sure if it was 'used oil' or not...
YouAreFullOfIt 2 years ago
thanks.
linatusay 2 years ago
Because water would soften it wouldn't it?
JimTheMingebag 2 years ago