case-hardened surface

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• case hardened — adjective Metal that is harder at its surface, due to a case hardening process …   Wiktionary

• case-hardened steel — noun steel with a surface that is much harder than the interior metal • Hypernyms: ↑steel …   Useful english dictionary

• case — I. /keɪs / (say kays) noun 1. an instance of the occurrence, existence, etc., of something. 2. the actual state of things: *This has been the case for a year, now. –glenda adams, 1982. 3. a question or problem of moral conduct: a case of… …  

• Case hardening — or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question …   Wikipedia

• case-harden — transitive verb Date: 1677 1. to harden (a ferrous alloy) so that the surface layer is harder than the interior 2. to make callous or insensible • case hardened adjective …   New Collegiate Dictionary

• case-harden — verb 1》 harden the surface of (a material). 2》 [as adjective case hardened] made callous or tough by experience …   English new terms dictionary

• Nitriding — is a heat treating process that diffuses nitrogen into the surface of a metal to create a case hardened surface. It is predominantly used on steel, but also titanium, aluminum and molybdenum. Typical applications include gears, crankshafts,… …   Wikipedia

• building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …   Universalium

• Induction hardening — is a form of heat treatment in which a metal part is heated by induction heating and then quenched. The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part. Induction hardening is used to… …   Wikipedia

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• Blade — For other uses, see Blade (disambiguation). Knife blades A blade is that portion of a tool, weapon, or machine with a cutting edge and/or a pointed tip that is designed to cut and/or puncture, stab, slash, chop, slice, thrust, or scrape animate… …   Wikipedia