欢迎登录材料期刊网

材料期刊网

高级检索

Using a Gleeble 3800 thermo-mechanical simulator, the effect of niobium and titanium on the dynamic re-crystallization (DRX) behavior of low carbon steels was investigated. Isothermal single compression tests were per-formed in the temperature range of 850 to 1 150 ℃ at eonatant strain rates of 0. 1 to 5 s-1. The experimental results showed that the addition of niobium and titanium to the low carbon steels significantly increased both the peak stress and steady state stress. The activation energy of deformation Qd was larger than the activation energy associated with the steady state stress Qss. Furthermore, the difference between Qd and Qss became significant because of the addition of niobium and titanium. DRX is effeetively retarded beeause of solute dragging and dynamic precipitate pinning of niobium and titanium, resulting in higher values of the peak strain and steady state strain. Finally, the influence of niobium and titanium on the DRX kinetics and steady state grain size was determined.

参考文献

[1] S.F.MEDINA;C.A.HERNANDEZ .THE INFLUENCE OF CHEMICAL COMPOSITION ON PEAK STRAIN OF DEFORMED AUSTENITE IN LOW ALLOY AND MICROALLOYED STEELS[J].Acta materialia,1996(1):149-154.
[2] Medina S F;Hernandez C A .Modeling of the Dynamic Recrystallization of Austenite in Low Alloy and Microalloyed Steels[J].Acta Materials,1996,44(01):165.
[3] Sang-Hyun CHO;Ki-bong KANG;John J. JONAS .Mathematical Modeling of the Recrystallization Kinetics of Nb Microalloyed Steels[J].ISIJ International,2001(7):766-773.
[4] Elwazri A M;Wanjara P;Yue S .Dynamic Recrystatlization of Austenite in Microalloyed High Carbon Steels[J].Materials Science and Engineering,2003,339A(1-2):209.
[5] Fernández A I;Uranga P;López B et al.Dynamic Recrystallization Behavior Covering a Wide Austenite Grain Size Range in Nb and Nb-Ti Mieroalloyed Steels[J].Materials Science and Engineering,2003,361A(1-2):367.
[6] 余驰斌,叶传龙,赵刚,张云祥,苏毅,宋平,陈良,鄢檀力.Nb-Ti钢高温变形时动态再结晶行为及模型探讨[J].武汉科技大学学报(自然科学版),2003(04):334-336.
[7] 马立强,袁向前,刘振宇,张丕军,焦四海,吴迪,王国栋.铌微合金钢动态再结晶的规律[J].钢铁研究学报,2006(09):47-50.
[8] Sieiliano F Jr;Jonas J J .Mathematical Modeling of the Hot Strip Rolling of Mieroalloyed Nb,Multiply-Alloyed Cr-Mo,and Plain C-Mn Steels[J].Metallurgical and Materials Transactions,2000,31A(02):511.
[9] Irvine K J;Pickering F B;Gladman T .Grain-Refined C-Mn Steel[J].Iron Steel Inst,1967,205(02):161.
[10] Matsuda S;Okumura N .Effect of Distribution of Ti Nitride Precipitate Particles on the Austenite Grain Size of Low Carbon and Low Alloy Steels[J].Transactions of the Iron and Steel Institute of Japan,1978,18(04):198.
[11] Zou H L;Kirkaldy J S .Thermodynamic Calculation and Experimental Verification of the Carbonitride-Austenite Equilibrium in Ti-Nb Microalloyed Steels[J].Metallurgical and Materials Transactions,1992,23A:651.
[12] Akben M G;Chandra T;Plassiard P et al.Dynamic Precipitation and Solute Hardening in a Titanium Microalloyed Steel Containing Three Levels of Manganese[J].Acta Metallurgy,1984,32(04):591.
[13] Hong S G;Kang K J;Park C G .Strain-lnduced Precipitation of NbC in Nb and Nb-Ti Microalloyed HSLA Steels[J].Scripta Materialia,2002,46(02):163.
[14] Sellars C M;Tegart W J M .Relationship Between Strength and Structure in Deformation at Elevated Temperatures[J].Memoires Scientifiques De La Revue De Metallurgie,1966,63(09):731.
[15] Uvira J L;Jonas J J .Hot Compression of Armco Irion and Silicon Steel[J].Trans Mctall Soc AIME,1968,242(08):1619.
[16] Sang-Hyun CHO;Ki-Bong KANG;John J. JONAS .The Dynamic, Static and Metadynamic Recrystallization of a Nb-microalloyed Steel[J].ISIJ International,2001(1):63-69.
[17] Stewart GR;Jonas JJ;Montheillet F .Kinetics and critical conditions for the initiation of dynamic recrystallization in 304 stainless steel[J].ISIJ International,2004(9):1581-1589.
[18] McQueen HJ.;Ryan ND. .Constitutive analysis in hot working[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1-2 Special Issue SI):43-63.
[19] Sellars C M.Recrystallization of Metals During Hot Deformation[A].London,UK:Metals Society,1980:3.
[20] Derby B;Ashby M F .On Dynamic Recrystallisadon[J].Scripta Metallurgica,1987,21(06):879.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%