Abstract：30MnVS non-quenched and tempered steel for direct cutting is produced by the following processes： 100 t electric arc furnace smelting→LF＋VD refining→320 mm×480 mm bloom continuous casting with soft reduction-controlled rolling and cooling process. The rational chemical composition has been formulated， Other measurements， such as the critical processes of the EAF end-point control， the deoxidization by producing white slag in LF， the addition of nitrogen and sulfur， the modification of sulphide and the casting with full protection at the low overheating temperature， etc. were proposed. The carbon difference on the cross section of steel bar was approximately 0.02%， and the grain size maitained No. 10 grade. Thus， the steel had an excellent combination of strength and toughness， as well as high thermal stability. The impact energy of as rolled steel bar was higher than 160 J. The yield strength was above 620 MPa， the impact energy was above 120 J， and the elongation was higher than 20% after normalizing at 1 160-1 200 ℃， which were much better than that of normal non-quenched and tempered steel.
收稿日期: 2016-06-29
出版日期: 2017-03-10
引用本文:
周 蕾，魏刚武，高延祥，孙 华. 30MnVS非调质钢的开发[J]. 钢铁, 2017, 52(3): 76-81.
ZHOU Lei，WEI Gang-wu，GAO Yan-xiang，SUN Hua. Development of 30MnVS non-quenched and tempered steel. Iron and Steel, 2017, 52(3): 76-81.
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