An essay on the mystery of tempering steel : wherein the effects of that operation are fully considered / Extracted from the works of the celebrated Mons. Reaumur ; By J. Savigny.

  • René Antoine Ferchault de Réaumur
Date:
1771
Catalogue details

Licence: Public Domain Mark

Credit: An essay on the mystery of tempering steel : wherein the effects of that operation are fully considered / Extracted from the works of the celebrated Mons. Reaumur ; By J. Savigny. Source: Wellcome Collection.

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    ( *7 ) partis, might in fome meafure oppofe their adhefion but that the fire in ran- fying the fteel, expelled this air from among its particles, the return of which was effectually prevented, by the fudden manner of cooling it, though it would again have entered the fteel, little by lit¬ tle, had it been fuffered to cool by de¬ grees ; but led any one fliould adopt this notion, as I myfelf was tempted to do, I will mention an experiment, which convinced me of its fallacy. I contrived means, after having given a very fufii- cient heat to a piece of fteel, to let it cool in a fpace free from air; now the reader will readily conceive, that if the hardnefs of fteel was occafioned by means of preventing the re-entrance of air, fteel D cooled