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单词 hard facing
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hard facing
hard facing n. a hard outer or surface layer; (Metallurgy) a coating of a metal resistant to abrasion applied to another, less resistant, metal; the application of such coatings.
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society > occupation and work > industry > working with specific materials > working with metal > [noun] > protecting metal with coating
hard facing1833
1833 Descr. Catal. Animals Zool. Soc. Dublin 68 Whilst the body of the tooth is of a softer substance, nature has provided it with a peculiarly hard facing of enamel.
1840 Jrnl. Amer. Inst. 4 302 This hard facing should be commenced upon the parts of the road most travelled.
1883 U.S. Patent 278,784 1/2 Silver or other white metal..was applied to the inferior metal and highly burnished before applying thereto the hard facing of nickel.
1930 Jrnl. Iron & Steel Inst. 122 542 Welded-on overlays or ‘hard facings’ have been applied to drill bits.
2003 Power Mar. 80 (advt.) Trim for the Power Industry: Control valve replacement parts, softgoods,..reverse engineering, specialty welding, hardfacing, precision machining.
extracted from hardadj.n.
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