| 单词 | soft-centre steel |
| 释义 | > as lemmassoft-centre steel a. Designating a mixture of hardened steel and a softer, stronger metal (esp. iron) in which the steel is fused to a core made of the other metal, as soft-centre steel, etc.Soft-centre steel is a strong and resilient material with a hard-wearing surface. John Lane (1824–97) is credited with having first developed and (in 1868) patented a technique for making ploughshares from the material. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > steel > [noun] > other types of steel hardened steel1557 shear steel1815 blister-steel1831 mild steel1850 carbon steel1856 Bessemer steel1864 soft centre1865 silicon steel1882 weld-steel1884 rimmed steel1920 1865 Rep. Chiefs Bureaus 360 in Message President in U.S. Congress. Serial Set (39th Congr., 1st Sess.: House of Representatives Executive Doc. No. 1) V 1,000 pounds round cast-steel ½ to 1¼ inch, soft centre. 1877 U.S. Patent 192,346 2/2 The soft-center ingot or slab, having hard-steel faces or outer surfaces, one of said outer surfaces being wrought cast-steel and the other cast-steel unwrought, substantially as specified. 1878 U.S. Patent 200,707 26 Feb. 1/1 Plow shares and points are commonly made either of steel or what is termed iron-center or soft-center steel. a1884 E. H. Knight Pract. Dict. Mech. Suppl. 828/1 Soft Center Steel, a composition of iron and steel... Used for safes, plows, etc. 1961 I. F. Reed et al. Moldboard plows (U.S. Dept. Agric. Farmers' Bull. No. 2172) 10/2 The surface of soft-center shares is harder than that of any other share and is therefore most resistant to wear and scours best. 2016 V. Smil Still Iron Age iii. 51 The mass production of mold-board steel ploughs with soft-center steel. < as lemmas |
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