The Hamon Thread

Finished this kwaiken out. I tried hot vinegar and wasn’t happy with what I had. Ended up going back to the ferric, 1500 grit powdered abrasive and green flitz with light back forth passes with felt wrapped around steel.
E6EEE738-2B8B-4947-9F12-6B9AA4F7A302.jpeg B8219FE5-9B9D-4123-9531-A71D7066A9E4.jpeg
 

Attachments

  • 75820412-04BC-4584-A81C-F2BAFF57A98A.jpeg
    75820412-04BC-4584-A81C-F2BAFF57A98A.jpeg
    81.8 KB · Views: 3
  • 2B004A91-5AF9-4466-B318-75ED3F1465CE.jpeg
    2B004A91-5AF9-4466-B318-75ED3F1465CE.jpeg
    90.6 KB · Views: 2
I did a couple 26c3 knives recently. I still polishing the little one. The larger one was cycle three times at 1425f, coated LIGHTLY, and heat treated at 1425f into brine. It survived the quench, but even though though the edge was 0.040”, it developed the worst bacon edge I have had in my shop since heat treating with a weed burner and used motor oil. I could see incredible activity at even 60grit on the grinder. Unfortunately I cracked the worst part of the bacon edge on the 6th temper over clamping it.

I’ll talk to @Larrin about some tests we can do to improve activity. I think the steel is ready for easy heat treat from the mill, but we can get more activity relatively easily with some grain refinement. I suspect brine will be overkill. I’ll be doing more experiments this week.
 
Willie71 said:
I did a couple 26c3 knives recently. I still polishing the little one. The larger one was cycle three times at 1425f, coated LIGHTLY, and heat treated at 1425f into brine. It survived the quench, but even though though the edge was 0.040”, it developed the worst bacon edge I have had in my shop since heat treating with a weed burner and used motor oil. I could see incredible activity at even 60grit on the grinder. Unfortunately I cracked the worst part of the bacon edge on the 6th temper over clamping it.

I’ll talk to @Larrin about some tests we can do to improve activity. I think the steel is ready for easy heat treat from the mill, but we can get more activity relatively easily with some grain refinement. I suspect brine will be overkill. I’ll be doing more experiments this week.
Click to expand...
Not to resurrect an old thread but I am curious if you ever reached out to Larrin. As far as getting the most activity out of these steels, I am assuming we want the smallest grain size possible that will still fully harden. We also want to aus low as possible as well correct? And as far as the microstructure pre HT, what would be best?
 
I think this is a worthy thread to bring up periodically, and a good update question as well.
 
You must log in or register to reply here.
Back
Top