稀土對含鈮鋼組織和性能的影響-全文預(yù)覽
【正文】 %的純鈰金屬,稀土在冶煉終點和出鋼前加入,試驗鋼的化學(xué)成分見表1。 Steel Corp.）Zeng Jing（Wuhan Iron amp。稀土對含鈮鋼組織和性能的影響朱興元 陳邦文 姜鳳琴 曾靜 朱天佑 林勤摘 要：研究了稀土對含鈮鋼組織和性能的影響,研究結(jié)果表明,稀土元素的加入使鋼的縱橫向強(qiáng)度先下降而后上升,鋼的延伸率和沖擊功則先上升而后下降,其對改善鋼的強(qiáng)度和20℃以下沖擊功的各向異性不明顯,而且對細(xì)化晶粒度和夾雜物級別影響不顯著,但稀土元素的加入使鈮的析出量略有增加。 Steel Corp.）Jiang Fengqin?。╓uhan Iron amp。 Technology Beijing）Abstract：Effects of rare earth on the micro structure and properties of Nbbearing steel have been investigated. Results prove that addition of rare earth elements into the steel causes the transversal and longitudinal strength of the strength decline initially and rise afterward, and the elongation and impact energy of the steel change in the reversal direction. As the results addition of rare earth in the steel could hardly improve the strength, anistropism and impact toughness below 20℃ and its effects on the grain refining and inclusion size improvement are also negligible, however it could probably offer a slight increase in Nb precipitation.Keywords：rare earth Nb bearing steel property1 前 言 近幾十年來,隨著微合金化元素Nb、V、Ti在鋼中的廣泛應(yīng)用,使得微合金化鋼得到了迅速發(fā)展,而微合金化元素Nb、V、Ti主要是利用其碳氮化物應(yīng)變誘導(dǎo)析出與高溫形變再結(jié)晶的交互作用產(chǎn)生晶粒細(xì)化以及沉淀強(qiáng)化的效果
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