Hello,
i made my first chinese style knife and after tempering it's blue. I used Uddeholm 1770 (C70 / 1.1620) steel and tempered it with my kitchen oven at 250°C / 482 °F for 1h like in the datasheet. To achieve such a color, the blade would have to have been ~ 320°C / 608 °F? The max temp setting of my oven is 250°C / 482 °F. So i set it to max power.
Do you have an idea why the blade is blue now? Can I still use the blade?
extra information:
- I never used Uddeholm 1770 before
- The blade was in the oven while he was heating up from 20°C -> 250°C
- Maybe there was oil residue on the blade
- Maybe the temperature control of the oven is very imprecise. But i think its impossible to reach 320°C with a old kitchen oven
Thanks for help,
Michael
i made my first chinese style knife and after tempering it's blue. I used Uddeholm 1770 (C70 / 1.1620) steel and tempered it with my kitchen oven at 250°C / 482 °F for 1h like in the datasheet. To achieve such a color, the blade would have to have been ~ 320°C / 608 °F? The max temp setting of my oven is 250°C / 482 °F. So i set it to max power.
Do you have an idea why the blade is blue now? Can I still use the blade?
extra information:
- I never used Uddeholm 1770 before
- The blade was in the oven while he was heating up from 20°C -> 250°C
- Maybe there was oil residue on the blade
- Maybe the temperature control of the oven is very imprecise. But i think its impossible to reach 320°C with a old kitchen oven
Thanks for help,
Michael
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