If the cutting tool made of poor steel, it is conventional quenching in water will not save him. To fix its softness and increase durability, can be carried out before cyanidation quenching with ferrocyanide, also known as potassium ferrocyanide, yellow sirkali, cruiselocal salt.
It is a powder in the form of crystals, which when heated saturates the surface layer of steel with carbon and nitrogen. Wear and korrozionnostojkoj processed in sirkali tool increased significantly faster than with carburizing. Cyanidation is possible to normalize hoe, knife, axe, chisel, and other tools or parts of machinery. It does not require much time, and so the method is convenient to apply at home.
What you’ll need:
- yellow blood salt;
- horn or cutting torch;
- a container of water.
First, artisanal check the hardness of the metal will circlem file.
Hit on the nail.
The result is obvious.
The process of cyanidation and hardening tool
A tool whose hardness is to be increased before treatment should be imprisoned, because after the cyanide and quenching it will make it more difficult at times. After sharpening the cutting edge is heated red-hot.
The hot tool is immersed in a cutting edge powder ferrocyanide. Upon contact, the crystals will start to melt, which is accompanied by toxic smoke. In connection with this work is best done under the hood or on the street.
Immediately after application of the crystal tool is returned back as heat.
It is necessary to re-heat and re-dip in salt.
This is repeated 2-3 times. If the tool has a thin cutting edge like a hoe or a knife, then the thickness of carburizing obtained for the 3 sets will be enough.
Then it is heated to the quenching temperature and cooled in water.
For example, the chopper can be assessed as far as her blade became stronger after quenching with pre-cyanidation.
Before processing, it is deformed when hitting the nail, after it could be easily cut.
Being able to get yellow blood salt can transform cheap tools of soft “clay” of steel in normal. Also this method will be able to increase the durability of gears, splines and other parts. If the product will be a heavy load, then after quenching with cyanidation should also do leave steel to prevent breakage.
After sharpening the edge of the blade is not inferior to the razor.