稀土在含鈮鋼中的作用規(guī)律

1、稀土在含鈮鋼中的作用規(guī)律稀土在含鈮鋼中的作用規(guī)律朱興元陳邦文姜鳳琴曾靜朱天佑林勤摘要：要：研究了稀土對(duì)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(duì)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(duì)細(xì)化晶粒度和夾雜物級(jí)別影響不顯著但稀土元素的加入使鈮的析出量略有增加。關(guān)鍵詞：關(guān)鍵詞：稀土含鈮鋼性能ROLEROLEOFOFRARERAREEARTHEARTHININN

2、bBEARINGNbBEARINGSTEELSTEELZhuXingyun（WuhanIron&SteelCp.）ChengBangwen（WuhanIron&SteelCp.）JiangFengqin（WuhanIron&SteelCp.）ZengJing（WuhanIron&SteelCp.）ZhuTianyou（UniversityofScience&TechnologyBeijing）Linqin（UniversityofSci

3、ence&TechnologyBeijing）AbstractAbstract：EffectsofrareearthonthemicrostructurepropertiesofNbbearingsteelhavebeeninvestigated.Resultsprovethatadditionofrareearthelementsintothesteelcausesthetransversallongitudinalstrengtho

4、fthestrengthdeclineinitiallyriseafterwardtheelongationimpactenergyofthesteelchangeinthereversaldirection.Astheresultsadditionofrareearthinthesteelcouldhardlyimprovethestrengthanistropismimpacttoughnessbelow20℃itseffectso

5、nthegrainrefininginclusionsizeimprovementarealsonegligiblehoweveritcouldprobablyofferaslightincreaseinNbprecipitation.KeywdsKeywds：rareearthNbbearingsteelproperty1前言近幾十年來(lái)隨著微合金化元素Nb、V、Ti在鋼中的廣泛應(yīng)用使得左右時(shí)最低而后隨著稀土含量的增加其縱橫向力學(xué)性能又

6、提高這與有關(guān)文獻(xiàn)報(bào)導(dǎo)所呈現(xiàn)的趨勢(shì)相吻合［2］。表3稀土微合金鋼的屈服點(diǎn)及抗拉強(qiáng)度編號(hào)橫向屈服點(diǎn)MPa橫向抗拉強(qiáng)度MPa橫向屈強(qiáng)比縱向屈服點(diǎn)MPa縱向抗拉強(qiáng)度MPa縱向屈強(qiáng)比14405300.8304305230.82324485250.8524184980.83934055130.7903684650.79044485200.8614204980.84454735530.8554485450.8123.1.2稀土對(duì)鋼的延伸率、斷面收縮率