| 单词 | oil-hardening | 
| 释义 | > as lemmasoil-hardening   oil-hardening  n. the process of hardening of steel by quenching it in oil. ΚΠ 1890    Nature 18 Sept. 503/1  				This process of oil-hardening, introduced first by Lord Armstrong in the case of barrels, is now almost universally adopted for all gun forgings. 1924    E. L. Rhead Metallurgy 		(new ed.)	 xi. 197  				Quenching in mercury..produces greater hardness and brittleness than quenching in water, while quenching in oil (oil hardening) produces a degree of hardness without brittleness. 1995    G. Tweedale Steel City ix. 318  				Sanderson Bros...built up a market in ground flat stock, especially in oil-hardening tool steel. < as lemmas  | 
	
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