I agree with everything Ray said. Especially the part about trying too many "new" things at once. When you go that route, and something goes wrong, it's very difficult to determine exactly what it is/was that caused issues, and therefore that much harder to figure out/overcome.
One thing in the pics that caught my eye is that it appears there are still some very heavy grit scratches on the blade.... those are potential stress risers..... in other words, begging fractures/cracks to occur during heat treat. The rule in my shop is before anything goes to heat treat, there are no scratches anywhere, larger then 120 grit.
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