| 释义 |
marage, v. Metallurgy.|ˈmɑːreɪdʒ|
[f. martensite + age v.]
trans. To allow (a maraging alloy) to cool slowly in the air so that it develops great strength without significant changes in dimensions as a result of the transformation of austenite to martensite and subsequent age-hardening of the martensite.
1962Trans. Amer. Soc. Metals LV. 524/2 Specimens were initially maraged at one temperature, and then maraged for various times at a second temperature. 1963Engineering 24 May 715 When homogenized and maraged it [sc. steel] is claimed not to be notch sensitive despite its exceptional strength.
So ˈmaraged ppl. a., ˈmaraging vbl. n., esp. in marag(e)ing alloy, maraging steel, steel that has been or may be hardened by maraging, generally containing up to 25 per cent nickel and smaller amounts of titanium, cobalt, molybdenum, or other elements.
1961Engineering 24 Mar. 407/3 The original American release says that the steel develops its high strength by means of a remarkably easy heat treatment involving age-hardening of martensite. For this they have invented a term ‘mar-aging’. 1962Trans. Amer. Soc. Metals LV. 61/2 Maraged hardness increased linerly [sic] as the product, cobalt times molybdenum, increased. Ibid. 529/2 In annealing of 18% Ni maraging steel, temperatures in the range 1100 to 1300 F should be avoided to prevent retained austenite. 1968R. Kumar Physical Metall. Iron & Steel xi. 292 In marageing alloys, the role of interstitial carbon in raising the strength of steel is taken over by substantial amounts of nickel, cobalt, and molybdenum. Ibid., Maraged steel is hardened without as much sacrifice of ductility. 1969Times 2 May (Suppl.) p. iv/8 The Deep Quest, which has reached 8,350 ft., the deepest point yet attained by a submersible, has a hull of maraging steel of high strength allied to exceptional toughness and weldability. 1970McGraw-Hill Yearbk. Sci. & Technol. 348/2 Hardening by maraging does not produce distortion or surface softening..so that no machining is necessary after hardening. 1972T. H. G. Megson Aircraft Struct. vii. 204 Maraging steels have been used as: aircraft arrester hooks, rocket motor cases, in helicopter undercarriages, gears, ejector seats and various structural forgings. |