| 单词 | heat treatment |
| 释义 | heat treatment
a. The specialized application of heat to various substances to produce a desired metallurgical or physical condition, e.g. hardness, softness, toughness. Hence heat-treat v.; heat-treatable a.; heat-treated ppl. a.; heat-treating vbl. n.
1895H. M. Howe in Trans. Amer. Inst. Mining Engin. 1894 XXIV. 746, I..call your attention to two directions in which very important progress may be..hoped for—pyrometry and the heat-treatment of steel. Ibid. 747 In the hardening and tempering of tools, in the annealing of steel castings,..and in the manufacture of guns, projectiles, and armor, we have already extensive and careful if empirical heat-treatment. 1899Jrnl. Iron & Steel Inst. LIV. 147 The simple heat treatment had converted the more or less brittle annealed material into tough and strong steel. 1904F. W. Harbord Metallurgy of Steel xxxix, (title) Heat treatment of steel. 1908Chem. Abstr. II. 1121 The Structure of Metals. Changes Produced by Working and by Heat Treatment. 1908Westm. Gaz. 2 June 4/2 The wonderful effect of heat-treating [of steel]. Ibid., With these alloying materials added to steel small gears can be made that, if properly heat-treated, they will be so tough and strong as to make it impossible to break out a tooth even with a sledge-hammer. 1946Nature 27 July 120/2 Plants from heat-treated grain were..somewhat shorter in the straw. 1947Hansard, Commons 4 Dec. 559 Mr. Lambert asked the Minister of Education the number of rural schools..in which the children are supplied with heat-treated milk. 1947Food & Drugs Statut. Rules & Orders dcxii. (heading) The ice cream (heat treatment, etc.) regulations, 1947. Ibid., The mixture shall be subjected to heat treatment as follows [etc.]. 1950J. G. Davis Dict. Dairying 332 Heat treatment of milk. The term is a general one covering any of the ordinary commercial heating methods by which the keeping quality of milk is enhanced and pathogenic organisms destroyed. 1956Nature 25 Feb. 360/1 He invented the heat-treatment which has for decades been applied as compulsory routine at every ginnery in the country. Ibid. 3 Mar. 436/2 The specimen [of an alloy] had been heat-treated. 1960Farmer & Stockbreeder 5 Jan. 64 All seed grown from heat-treated stocks. 1960Times (Roy. Soc. Number) 19 July p. xxi/3 Heat-treatable aluminium alloys. 1963B.S.I. News Feb. 17/1 Fifteen different steels..were heat-treated by the National Engineering Laboratory. 1971Nature 26 Nov. 231/1 Heat treatment (57°C for 30 s in summer) disrupted the layer into irregular globules.
b. The therapeutic use of heat, esp. radiant and infra-red heat.
1934J. E. Mansion Harrap's Fr. & Eng. Dict. 837/2 Thermothérapie, heat cure, heat treatment, thermotherapy. 1967Listener 5 Oct. 427/2 He asked for..heat treatment, which my wife should apply herself. |
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