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For more information, see the Knife article.
Additional recommended knowledge
Materials for Blades
Different steels are suited to different applications. It is a tradeoff between hardness, toughness, edge retention, price, and corrosion resistance, achievable sharpness, Also the difficulty of working with the material must be taken into account. Some examples of extremes:
Forge Anvil Hydraulic Press
In forging, the metal heated to high temperature in Forge and pounded against an Anvil to achieve the shape, often %90 done. Steel can be folded either to form decorative pattern welded steel or to refine raw steel, as the Japanese call it, tamahagane. Grain size should be kept at a minimum and growth is easily occurring in forging.
In mass production or well equipped shops blanking can be done. This is done with a number of methods, depending on the thickness and the alloy of steel to be cut. Thinner, low alloy blanks can be stamped from sheet. More difficult, or higher production jobs can be done with cnc water jet cutters, lasers or electron beam cutting. These two lend themselves towards larger custom shops.
Knifemakers will sometimes contract out to a shop with the above capabilities to do blanking. For lower production makers, or lower budgets, other methods must suffice. Knifemakers may use many different methods to profile a blank. These can include hacksaws, files, belt grinders, wheel grinders, oxy-acetylene torches, or any number of other methods depending on budget.
If no power equipment is available, this can be done with files if the piece of steel has not yet been hardened. Grinding wheels, or small belt sanders are usually what a beginner uses. Well equipped makers usually use a large industrial belt grinder, or a belt grinder made specifically for knifemaking.
The finish quality of the blade is determined by the Grit of the finishing grind. These can range from a low-shine 150-250 grit finish to a mirror-shine accomplished with a Japanese water-stone, which has an approximate grit of 10,000-12,000. Most high quality manufactured knives have about an 8000 grit finish.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Knife_making". A list of authors is available in Wikipedia.|