【正文】
re earth on the properties and structures of lowsulphur result shows that of steel can be greatly improved by adding rare earth does not affect the structures of steel,but it can increase the ferrite amount and reduce the pearlite magnitude as well as improve slightly the grain size level.Keywords rare earth lowsulphur steel property1 前言 稀土在冶金工業(yè)中尤其是鋼中的應(yīng)用是一個(gè)古老而新興的課題,稀土在鋼中的作用主要表現(xiàn)在三個(gè)方面[1],即凈化鋼液:脫氧、脫硫、減少鋼中夾雜物和降低磷、硫、砷、銻、鉍、鉛、錫等元素的有害作用?! £P(guān)鍵詞 稀土 低硫鋼 性能Behaviour of Rare Earch in LowSulphur SteelZhu Xingyuan Chen Bangwen Zeng Jing(Wuhan Iron % Steel Corp.)Zhu Tianyou Lin Qin(University of Science amp。2 試驗(yàn)條件和試驗(yàn)方案 試驗(yàn)鋼在50kg真空感應(yīng)爐中冶煉,稀土為含鈰量大于99%的純鈰金屬,稀土在冶煉終點(diǎn)和出鋼前加入,試驗(yàn)鋼的基本成分設(shè)計(jì)參照工業(yè)管線用鋼,其化學(xué)成分的平均值見表1?!∠⊥翆?duì)鋼的延伸率、斷面收縮率及冷彎的影響 表3為試驗(yàn)鋼的橫向與縱向延伸率及橫向斷面收縮率的結(jié)果,由表可以看出,稀土元素的加入可以改善鋼的橫向延伸率[4],其對(duì)縱向延伸率及斷面收縮率的影響不顯著,而180176。 表3 各組試驗(yàn)鋼的橫向與縱向延伸率及橫向斷面收縮率編號(hào)橫向延伸率/%橫向斷面收縮率/%橫向