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单词 precipitation hardening
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precipitation hardening
precipitation hardening n. Metallurgy hardening of an alloy by heat treatment that causes the precipitation from solid solution of crystals of a solute phase; a strengthening process utilizing this phenomenon.
ΘΚΠ
society > occupation and work > industry > working with specific materials > working with metal > [noun] > hardening, tempering, or annealing > other types of hardening
case-hardening1666
precipitation hardening1926
martempering1943
shot-peening1944
marquenching1947
1926 R. S. Archer in Trans. Amer. Soc. Steel Treating 10 719 It is proposed in this paper..to develop the general theory of what may be called ‘precipitation hardening’.
1931 Jrnl. Iron & Steel Inst. 124 671 The binary iron-boron alloys were incapable of hardening by quenching and the precipitation hardening was hardly noticeable.
1989 A. C. Davies Sci. & Pract. Welding (ed. 9) I. ii. 130 As time passes the constituents precipitate into a more uniform pattern in the alloy and the strength and hardness increase. This is known as natural age-hardening or precipitation hardening and can be from a few hours to many months.
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