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need help Answered

Does anyone know a way to straighten a knife with minimal tools?

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ll.13

11 years ago

Light a fire to heat the blade red hot, then straighten it, then heat it back up, ( (until it loses magnetic attraction), then dunk it in oil, old engine oil, vegetable..... clear off all the oil, then cook it for a few hours at a low heat, (200-300 Celsius) The result should be a straightened knife, and a tempered blade. (;

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abbabibble2ll.13

Reply 11 years ago

Not tempered. Hardened. To temper you have to do it carefully AFTER you've hardened it. What you do is for higher carbon steel is you heat it red, quench, then you take a torch or the dragon's breath of your forge and heat it from the spine, and wait for the rainbow of colors to creep across the blade. Generally, for the steel i use (high carbon leaf springs) you want the blade to be straw color.

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ll.13masterochicken

Reply 11 years ago

Don't worry I don't either, I did this (or very similar) with, wood, a few bricks, and a hammer. :) very, very low tech, but it worked. Just build a fire, charcoal for BBQ's is good, otherwise use coal or if that's not available use wood, and when there's lots of good embers stick the blade in. 'till cherry red, check magnetism, then on a (very)flat rock, or brick, your vice, just something solid bash it flat, then check it for straightness. repeat if necessary. ;)

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Goodhartll.13

Reply 11 years ago

If it has enough carbon it it. Some stainless steel knives are not worth a fart in a windstorm for this. :-)

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jtobako

11 years ago

You will need to slightly over bend it to get it strait, a big pair of pliers (or better, a vice) and a couple of nails would work. The nails will give the extra room to over bend so that the blade will spring back to strait.

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Vendigroth

11 years ago

If it bent one way, it'll bend back. Use a wooden mallet, or a light hammer with the face covered in cloth (so's you don't scratch it) and gently tap it back into shape.

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guyfrom7up

11 years ago

buy a new one, all you need is a wallet, lol.

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guyfrom7upmasterochicken

Reply 11 years ago

I was just joking, anyways what kind of knife is it? Some knifes your can't be straighten.

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Goodhartmasterochicken

Reply 11 years ago

Ok, if it is good stainless, it will have some flexibility to it, but also a bit of hardness. Too hard a whack may break it. If it is cheaper stainly, you could probably smash it straight with a good sledge hammer on an anvil or the flat heel of a vise. Paring knives are not usually made with the finest steel :-) If it bent in the first place, and didn't break, it is probably not super hard steel either. Just remember, with each "bend", one side of the steel is stretched and the other side compressed. Bending it back stresses the opposite side in the opposite way. So with each bend and each straightening, you weaken the blade tremendously.

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Goodhartmasterochicken

Reply 11 years ago

Well then, if it isn't bent too far around, it shouldn't be too hard to hammer straight.

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chaoscampbell

11 years ago

well it depends on the knife...... and what kind of condition you want it in when your done..... and how straight you want it. I'd suggest: 1. A vice tightend as tight as you can get it 2. a hammer and a hard surface 3. a blow tourch and a pair of pliers

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masterochickenchaoscampbell

Reply 11 years ago

I don't care much about the condition at all. This is more of a learning experience for me.