O1 heat treating

[Claude Marquis]

Hi everybody,
I have recently made a few "sandwich" blades with the outer layers of nickel-steel damascus and the center core out of pure O1.
After forging to shape,I found extremely dificult to drill a hole or file the blade. The outer layers remained "soft", but the O1 was really too hard. This was before tempering !
What have I done wrong?
Can anybody tell me the right way to do ?
Many thanks to everybody.
Please be indulgent with my English, I usually speak French!
Claude

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[yoda4561]

Um Claude.... I guess you arent familiar with this type of forum.... You can edit your posts, and when you wish to add something to the topic, post it in the same thread..

 

[mikeS]

Claude, you didn't mention anealing after forging, 0-1 will be in abrittle state after forging to anneal heat to 1400 f. and cool at the rate of 50 f. an hour to 1200 f. hope this helps