Hi all,
I was hoping I could ask some advice, Im just making my third and fourth blades, there have been a few new things Ive done with these that I havent done before, the bevels were ground by hand tools only, and most relevant to this post, I was unable to use the furnace that I normally use ( a work one with electronic temp regulation) so I used the method were you use a pot bellied barbeque and put a hairdryer at the air intake to get the temperature up
Anyway, the pictures Ive attached are of the blades after tempering, What concerns me is the mottling on the blade the patterns are physical indentations ( though not particularly deep).
I know that this is cause by temperatures that are too high, but some people have suggested to me that this amount of motelling is not too bad and nothing to be worried about.
I was just hoping for some second opinions, what do you guys think? The lower picture is probably the best out of the two, as the mottled pattern doesnt quite reach the bevels
Finally, if I do have to redo these, whats the procedure to correct the larger grain size?
Many thanks in advance, Id be lost without forums like these!
Andrew
I was hoping I could ask some advice, Im just making my third and fourth blades, there have been a few new things Ive done with these that I havent done before, the bevels were ground by hand tools only, and most relevant to this post, I was unable to use the furnace that I normally use ( a work one with electronic temp regulation) so I used the method were you use a pot bellied barbeque and put a hairdryer at the air intake to get the temperature up
Anyway, the pictures Ive attached are of the blades after tempering, What concerns me is the mottling on the blade the patterns are physical indentations ( though not particularly deep).
I know that this is cause by temperatures that are too high, but some people have suggested to me that this amount of motelling is not too bad and nothing to be worried about.
I was just hoping for some second opinions, what do you guys think? The lower picture is probably the best out of the two, as the mottled pattern doesnt quite reach the bevels
Finally, if I do have to redo these, whats the procedure to correct the larger grain size?
Many thanks in advance, Id be lost without forums like these!
Andrew
