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Sen/Pak heat treating bags are shown in the two photos.....Therefore, holes will be punched in the bags after they are immersed completely in the hardening oil!. Jim Allen
Quote from: strictlybusiness1 on July 02, 2015, 08:58:19 PMSen/Pak heat treating bags are shown in the two photos.....Therefore, holes will be punched in the bags after they are immersed completely in the hardening oil!. Jim AllenVery interesting, Jim- are the foil bags themselves filled with an inert gas or something consumable to mitigate oxygen inside while being sealed up?- is the general idea of punching the bag while submerged that oil floods in & contacts the steel (ie not atmosphere/oxygen)- what does double tempering accomplish & what's the methodology? (ie a repeat of temper #1 or different temp/time recipe?)- maybe I missed, but interested to know what heat treating oven you usethx/Peter