A2 quality issue?

D

Dmitry.M

Joined
Jun 13, 2006
Messages
1,008
I was finishing a blade made of A2 steel. I got the steel from FlatGround. It was clean and neat after all steps including HT and tempering. But after I removed the last tiny layer of metall during finish I discovered ugly rough and dark stripe and few dots on the blade close to the edge, it looks like flocken(bubble, void) that was rolled over. It is almost in the very middle of the flat piece from wich I ground it. Did anybody experienced anything like that? The blade is damaged too much for use and sale now and I am concerned about the quality of ALL blades that I've made from the same piece of A2...:(
 
Call the supplier and tell them what you have , they should replace it !
 
Can you post a nice SHARP AND CLEAR Photo of what you mean? I've used plenty of A2 from Flatground and have never had a problem with it.
 
I've never had a problem with any of the A2 that I've gotten from Flatground.com, either. I'm really interested to see a photo of the problem.
- Mitch
 
I have been using A2 from flatground (and D2) since 2001 and have only had one blade fail in heat treat. I sent them a photo and said I wasn't sure what had happened, tbey sent a whole new bar and asked me not to use the rest of the original bar. Their replacement was very prompt and I think theu are top notch.

This failure was a split that looked like delamination and happened during cryo. That is what started me looking more closely into the effects of cold trreatment.
 
Ok here is the pic. It is cropped to magnify the problem area.
If I would ground it more the upper double dark spot will open in a continuos groove. So there is actualy two problem places. One is closer to the edge and another more to the middle. At the right side there are more light than regular metall spots. In the biggest one there is pinhole spot also and it is inline with upper spot on the left.
I could grind it deeper and possibly take it off of there is no more voids. Otherwise I will remove current ones and open new voids.
 
That's what we call a 'slight imperfection ' in the steel industry !! LOL They should replace it without question.
 
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