- Joined
- Jun 22, 2003
- Messages
- 3,049
since theres been a few threads describing "chipped busse's", i thought it approapriate to post a thread that showed 4 common types of edge deformation and damage, the dent, the mash, the roll, and the chip. the first three can be steeled out in most cases, and the 4th is pretty much unfixable, except for regrinding that section of the edge geometry.
the two blades i used for the pictures are a super cheap set of throwers, i assume made of 420, wich can be bent (very very easily) in the hands. their basically butter soft. the second (the chipped blade) is a himalayan imports 20" sirupati. i beleive that i hit that section on a small rock while cutting up branches in a garbage can. the fact that it chipped shows that that area is of high hardness (for 5160/spring steel).
1: edge dent.
an edge dent is where something hits the edge at an angle, and moves a small section of the edge to the right or left, misaligning that portion. no metal is removed in this action, and it can be steeled out, basically bumping it back into alignment. an edge dent can be very very small, to a degree that its dificult to see wether or not the edge has been pushed over, or mashed down.
2: an edge mash.
an edge mash is when you hit something dead on, like a peice of metal, or a rock, that causes teh metal to push into itself, mushrooming out the sides. this can be pushed back into form with steeling, though this is harder to do then with a dent. no metal is removed in this deformation. in the case of this cheap thower - the mash is bad enough that it actually split the metal that was mushroomed out. a better/harder steel wouldnt have dont that, this stuff is just really, really, REALLY soft. to cause this mash i hit the edge on the back of another knife.
the other side - mushroomed out on both sides of the blade
the two blades i used for the pictures are a super cheap set of throwers, i assume made of 420, wich can be bent (very very easily) in the hands. their basically butter soft. the second (the chipped blade) is a himalayan imports 20" sirupati. i beleive that i hit that section on a small rock while cutting up branches in a garbage can. the fact that it chipped shows that that area is of high hardness (for 5160/spring steel).
1: edge dent.
an edge dent is where something hits the edge at an angle, and moves a small section of the edge to the right or left, misaligning that portion. no metal is removed in this action, and it can be steeled out, basically bumping it back into alignment. an edge dent can be very very small, to a degree that its dificult to see wether or not the edge has been pushed over, or mashed down.
2: an edge mash.
an edge mash is when you hit something dead on, like a peice of metal, or a rock, that causes teh metal to push into itself, mushrooming out the sides. this can be pushed back into form with steeling, though this is harder to do then with a dent. no metal is removed in this deformation. in the case of this cheap thower - the mash is bad enough that it actually split the metal that was mushroomed out. a better/harder steel wouldnt have dont that, this stuff is just really, really, REALLY soft. to cause this mash i hit the edge on the back of another knife.
the other side - mushroomed out on both sides of the blade
