| 释义 |
▪ I. ˈrimming, (vbl.) n.
[f. rim n.1 or v.1]
The action of providing with a rim; a rim or border.
1831Carlyle Sart. Res. i. x, The Carman, who understands..the rimming of wheels..is the more cunningly gifted of the two. 1868A. I. Menken Infelicia 81 To-night, O Soul! Shut off thy little rimmings of Hope.
▪ II. ˈrimming, ppl. a.
[f. rim n.1 or v.1]
rimming steel: a low-carbon steel in which deoxidation has been controlled and limited to produce ingots having an outer rim or skin relatively free from carbon and impurities.
1926Iron Age CXVII. 1778 Rimming steel is also called by some ‘open steel’, because the top of the ingot does not freeze over as rimming in proceeds, but the central metal continues fluid and in active motion for some minutes after teeming. 1930Engineering 14 Mar. 357/2 Exceptions are metals such as steel of the ‘rimming’ type, from which very large quantities of gas are rapidly evolved during solidification. 1956J. Dearden Iron & Steel To-Day (ed. 2) ix. 148 Low carbon steel which has been only partially killed is known as ‘rimming steel’ because of the rim of almost pure iron which forms the outer portion of the ingot. 1967A. H. Cottrell Introd. Metallurgy xi. 138 The alternative is to prevent the metal from shrinking by allowing a small amount of CO to form as bubbles, when it freezes. This is done in rimming steels. These are low-carbon (‹ 0·15 per cent C) steels usually used for sheet steel pressings. |