| 释义 |
dead-melt, v. trans.|ˈdɛdmɛlt|
To keep (metal) at a melting temperature until it is perfectly fluid and no more gas is evolved. Hence dead-melted ppl. a., dead-melting vbl. n.
1880Encycl. Brit. XIII. 341/2 If cast immediately it is found that a much larger quantity of gas separates during solidification, rendering the steel porous, than is evolved if the metal is dead-melted, i.e., allowed to remain melted for an extra half hour or more. Ibid., The ‘dead melting’ effect of the extra time allowed in fusing steel for the molten metal to stand in the furnace after fusion is brought about is due [etc.]. 1884[see dead a. A. 22 c]. 1952C. A. Edwards Struct. & Prop. Mild Steel i. 15 Towards the end of the operation of making steel by the acid process..the oxygen content of the metal will be extremely low... A charge of this kind is known as ‘dead melted’ steel, which means that..solidification proceeds without the liberation of gas.
So dead melt n., the state of a melt when it contains no solid and is evolving no gas.
1929W. Lister Pract. Steelmaking viii. 48 When the whole charge has come to a dead melt, but not before, commence to feed. |