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：研究了稀土對含鈮鋼組織和性能的影響研究結果表明稀土元素的加入使鋼的縱橫向強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度和20℃以下沖擊功的各向異性不明顯而且對細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。關鍵詞：關鍵詞：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前言近幾十年來隨著微合金化元素Nb、V、Ti在鋼中的廣泛應用使得左右時最低而后隨著稀土含量的增加其縱橫向力學性能又

6、提高這與有關文獻報導所呈現(xiàn)的趨勢相吻合［2］。表3稀土微合金鋼的屈服點及抗拉強度編號橫向屈服點MPa橫向抗拉強度MPa橫向屈強比縱向屈服點MPa縱向抗拉強度MPa縱向屈強比14405300.8304305230.82324485250.8524184980.83934055130.7903684650.79044485200.8614204980.84454735530.8554485450.8123.1.2稀土對鋼的延伸率、斷面收縮率