self-fluxingn.
/ˌsɛlfˈflʌksɪŋ/, U.S. /ˌsɛlfˈfləksɪŋ/ 1. In smelting: the action or process of an ore or sinter releasing its impurities in the form of liquid slag without the addition of a separate flux (flux n. 11a), such as limestone, to facilitate this. Now rare.
ΘΚΠ
society > occupation and work > industry > working with specific materials > working with metal > [noun] > extraction from ore > smelting > part of process
fermentation1791
sintering1873
self-fluxing1880
1880 Engin. & Mining Jrnl. 14 Feb. 121/1 This ore, unlike that of the Longfellow, does not carry the necessary properties for self-fluxing.
1966 Iron & Steel 14 Dec. 596/1 Self-fluxing of sinter and pellets must be of such an extent that there is no need to include raw limestone in the burden.
2. In brazing, soldering, and welding: the action or process of melting and flowing without the addition of a separate flux (flux n. 11a).
ΚΠ
1922 Power 23 May 833/1 A good welding steel has the self-fluxing property; that is to say, its scale melts and forms a natural welding flux.
1968 Automatic Welding Sept. 59/1 The boron and silicon lower the melting point of the chromium-nickel alloy, and give it a capacity for self-fluxing.
2016 P. M. Roberts Introd. Brazing Technol. iv. 65 This latter effect might be the result of a form of partial self-fluxing of the filler material.
This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).
self-fluxingadj.
/ˌsɛlfˈflʌksɪŋ/, U.S. /ˌsɛlfˈfləksɪŋ/ 1. Of ore (esp. iron ore) or sinter: that releases its impurities during smelting in the form of liquid slag without the addition of a flux (flux n. 11a), typically because it contains a high proportion of lime.
ΚΠ
1857 Charleston (S. Carolina) Mercury 11 Sept. Iron ore (the Black Band which is self-fluxing in a great degree) abounds in a great quantity.
1884 W. H. Greenwood Steel & Iron vi. 104 The ore is accompanied by a sufficient quantity of calcareous matters to yield the necessary flux without any further addition of fluxing materials to the charge; such ores are..known as ‘self-going’ or ‘self-fluxing’.
1923 F. W. Harbord & J. W. Hall Metall. Steel (ed. 7) II. xxvi. 504 A few ores have an excess of lime, and if unable to secure self-fluxing ores the blast furnace manager endeavours to mix siliceous and calcareous ores..to form a self-fluxing mixture.
1966 Michigan Technic Nov. 26/3 The introduction of self-fluxing sinter in which the sintered ore fines are mixed with the calcium oxide and charged to the furnace has also increased production.
2006 S. Afr. Archaeol. Bull. 61 147/1 While much pre-European iron smelting used self fluxing ores, some societies used sand..as a flux.
2. In brazing, soldering, and welding: that melts and flows without the addition of a separate flux (flux n. 11a).
ΚΠ
1899 U.S. Patent 628,541 1/1 Such self-fluxing solder or wire has heretofore been constructed in the form of a tube..filled with a flux either dry or pulverized or in the form of a paste.
1911 Brotherhood of Locomotive Firemen & Enginemen's Mag. July 6/1 Charcoal iron carries considerably more impurities than soft open hearth steel, and these impurities form a self-fluxing mixture which facilitates welding.
1972 Mutual Substitutability Aluminum & Copper (National Materials Advisory Board) v. 41 With the use of a self-fluxing brazing alloy.., joints between copper conductors can be made readily because of capillary action of the brazing alloy.
2000 Lighting Jrnl. Mar. 34/1 Any necessary repairs to the galvanising system should be made using a heated self-fluxing galvanising repair stick.
This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).
<
n.1880adj.1857