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A knife is a tool with a cutting edge or blade often attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least two-and-a-half million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone, over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin.
Differential heat treatment is a technique used during heat treating to harden or soften certain areas of a steel object, creating a difference in hardness between these areas. There are many techniques for creating a difference in properties, but most can be defined as either differential hardening or differential tempering. These were common heat treating techniques used historically in Europe and Asia, with possibly the most widely known example being from Japanese swordsmithing. Some modern varieties were developed in the twentieth century as metallurgical knowledge and technology rapidly increased.
The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload. There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, HRB, HRC, etc., where the last letter is the respective Rockwell scale . When testing metals, indentation hardness correlates linearly with tensile strength.
A blade is the portion of a tool, weapon, or machine with an edge that is designed to puncture, chop, slice or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are to be used on. Historically, humans have made blades from flaking stones such as flint or obsidian, and from various metal such as copper, bronze and iron. Modern blades are often made of steel or ceramic. Blades are one of humanity's oldest tools, and continue to be used for combat, food preparation, and other purposes.
Buck Knives is an American knife manufacturer founded in San Diego, California and now located in Post Falls, Idaho. The company has a long history through five generations of the Buck family from 1902 to the present day. Buck Knives primarily manufactures sport and field knives and is credited with inventing the "folding hunting knife" and popularizing it to such a degree that the term "buck knife" has become synonymous with folding lockback knives, including those made by other manufacturers.
Strider Knives, Inc. is a custom and production knifemaking facility headed by Mick Strider based in San Marcos, California.
Spyderco is an American cutlery company based in Golden, Colorado, producing knives and knife sharpeners. Spyderco pioneered many features that are now common in folding knives, including the pocket clip, serrations, and the opening hole. Spyderco has collaborated with 30 custom knife makers, athletes, and self-defense instructors for designs and innovated the usage of 20 different blade materials.
Ernest R. Emerson is an American custom knifemaker, martial artist, and edged-weapons expert. Originally an engineer and machinist in the aerospace industry, Emerson became a knifemaker by producing knives for a martial arts class and making art knives early in his knifemaking career. In the 1980s he became better known for his combat knives and popularizing a style of knife known as the Tactical-folder.
A ceramic knife is a knife designed with a ceramic blade typically made from zirconium dioxide (ZrO2; also known as zirconia). These knife blades are usually produced through the dry-pressing and firing of powdered zirconia using solid-state sintering. It is 8.5 on the Mohs scale of mineral hardness, compared to 4.5 for normal steel and 7.5 to 8 for hardened steel and 10 for diamond. The resultant blade has a hard edge that stays sharper for longer when compared to conventional steel knives. While the edge is harder than a steel knife, it is more brittle. The ceramic blade is sharpened by grinding the edges with a diamond-dust-coated grinding wheel.
Knife making is the process of manufacturing a knife by any one or a combination of processes: stock removal, forging to shape, welded lamination or investment cast. Typical metals used come from the carbon steel, tool, or stainless steel families. Primitive knives have been made from bronze, copper, brass, iron, obsidian, and flint.
Christopher Stanley Reeve is a South African-American knife maker, recognized as one of the most influential people in knife making history. Reeve founded Chris Reeve Knives (CRK), and is co-owner of the company with his wife, Anne Reeve. In 2015 he was inducted into the Blade Magazine Hall of Fame.
Kershaw Knives designs, sources and manufactures a wide range of knives, including pocketknives, sporting knives, and kitchen cutlery. Kershaw is a brand of Kai USA Ltd., a member of the KAI Group, headquartered in Tualatin, Oregon, United States.
Rogue Warrior is a 2009 first-person shooter video game developed by Rebellion Developments and published by Bethesda Softworks for Microsoft Windows, PlayStation 3 and Xbox 360. The game was released on 26 November 2009 in Australia, 27 November in Europe, and 1 December in North America.
Ken Onion is an American custom knifemaker based in Kaneohe, Hawaii, United States who invented the "SpeedSafe" assisted opening mechanism for Kershaw Knives. Ken Onion was the Premier Knife Designer for Kershaw Knives.
SOG Specialty Knives, Inc. is an American knife and tool manufacturing company famous for their reproduction SOG Knife from the Vietnam era.
Chris Reeve Knives is an American knife manufacturing corporation with international sales and distribution headquartered in Boise, Idaho, that designs, develops, and sells folding pocket knives and fixed-blade knives. Its products include the Sebenza, Inkosi, Umnumzaan, TiLock, Mnandi folding knives, Impinda slip joint, and the Green Beret, Pacific, Professional Soldier, Nyala, and Sikayo fixed blade knives. Chris Reeve Knives' industry contributions include the Integral Lock, contributions to the blade steel CPM S35VN, and has won Blade Magazine's Blade Show Manufacturing Quality Award 15 times. Their motto is Think Twice, Cut Once.
The CQC-6 or Viper Six is a handmade tactical folding knife with a tantō blade manufactured by knifemaker Ernest Emerson. Although initially reported as the sixth design in an evolution of fighting knives and the first model in the lineup of Emerson's Specwar Custom Knives, Emerson later revealed that the knife was named for SEAL Team Six. It has a chisel-ground blade of ATS-34 or 154CM stainless steel and a handle made of titanium and linen micarta. The CQC-6 is credited as the knife that popularized the concept of the tactical folding knife.
The Commander (knife) is a large recurve folding knife made by Emerson Knives, Inc. that was based on a custom design, the ES1-M, by Ernest Emerson that he originally built for a West Coast Navy SEAL Team. It was winner of the Blade Magazine Overall Knife of the Year Award for 1999.
Mike Snody is a Southern Texas knife maker who is known for his use of exotic materials in his custom knives. He is currently based in Walsenburg, Colorado.
References
- 1 2 3 4 5 6 7 8 9 10 Hartink, A.E. (September 30, 2005). Complete Encyclopedia of Knives. Lisse, The Netherlands: Chartwell Books. pp. 448. ISBN 978-1-85409-168-0.
- ↑ Rowe, Janice (1991)Mad Dog Knives. Fighting Knives Magazine, Spring 1991, pp. 38-41
- 1 2 Dockery, Kevin (2004). Weapons of the Navy SEALs. New York: Berkley. ISBN 0-425-19834-0.
- ↑ McClung, Kevin (1991)Get A Grip. Fighting Knives Magazine, Summer 1991, pp. 18-19, 93-94
- ↑ Huntington, Roy (2000).Kevin McClung is a Mad Dog, American Handgunner Magazine, Volume 10, Issue 5
- 1 2 Karwan, Chuck(1999)Mirage X Ceramic Blades. Tactical Knives Magazine, May 1999, pp. 66-71
- ↑ Dick, Stephen (1995), "Blades of the Combat Swimmers", Tactical Knives, vol. 1, no. 2, p. 68-73
- ↑ Marcinko, Richard (with John Weisman)(1995) Rogue Warrior: Green Team, ISBN 0-671-79959-2
- ↑ Zeman, Ned.(2002) Seagal Under Siege. Vanity Fair , October 2002: p. 236-250.
- ↑ Elite Military Knives
