采用Gleeble-3500热模拟试验机对一种新型冷轧工作辊用高速钢进行了热压缩变形试验,研究了该钢在900～1150℃、应变速率为0.01～10 s-1条件下的动态再结晶行为,测量了该钢的应力-应变曲线并观察了其典型的微观组织,建立了Z参数表达式、热变形方程、峰值应力和峰值应变与Z参数的关系及动态再结晶模型图。结果表明：冷轧工作辊用高速钢的应力-应变曲线表现为动态再结晶型;其热变形激活能为541.4 kJ/mol;峰值应力、峰值应变与Z参数近似成指数关系;随着Z参数的增大,发生动态再结晶的临界应变εp和发生完全再结晶的应变εs均增加。
Hot compressive experiment of a novel high speed steel for cold mill work roller was carried out on a Gleeble-3500 thermo- simulation machine. The dynamic recrystallization behavior of the steel between 900 to 1150 ℃ and with strain rates from 0.01 to 10 s-1 was investigated. The stress-strain curves were measured and the typical microstructure were observed. Meanwhile, the Zener-Hollomon parametric equation, the thermal deformation equation, the relationship between the peak stress, peak strain and Z parameter and dynamic recrystallization diagram were established, respectively. The results show that the stress-strain curve of the high speed steel for cold mill work roller exhibits dynamic recrystallization characteristics and its thermal deformation activation energy is 541.4 kJ/mol. The peak stress, peak strain and Z parameter follow an exponential law. With the increase of Z parameter, the critical strain εp for dynamic reerystallization occurring and strain εs for complete dynamic recrystallization increase together.
参考文献
| [1] | Hanguang Fu;Yinhu Qu;Jiandong Xing;Xiaohui Zhi;Zhiqiang Jiang;Mingwei Li;Yi Zhang .Investigations on Heat Treatment of a High-Speed Steel Roll[J].Journal of Materials Engineering and Performance,2008(4):535-542. |
| [2] | N. F. Garza-Montes-de-Oca;W. M. Rainforth .Wear mechanisms experienced by a work roll grade high speed steel under different environmental conditions[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2009(Pt.1):441-448. |
| [3] | XIAODAN ZHANG;WEI LIU;ANDREW GODFREY .The Effect of Long-Time Austenization on the Wear Resistance and Thermal Fatigue Properties of a High-Speed Steel Roll[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2009(9):2171-2177. |
| [4] | E. J. Kerr .High speed steel work rolls at dofasco[J].Iron & Steelmaker,2000(1):27-30. |
| [5] | Hwang K C;Lee S;Lee H C .Effects of alloying elements on microstructure and fracture properties of cast high speed steel rolls.Part I:Microstructure analysis[J].Materials Science and Engineering A,1998,254(01):282-295. |
| [6] | Hwang KC.;Lee HC.;Lee S. .Effects of alloying elements on microstructure and fracture properties of cast high speed steel rolls Part II. Fracture behavior[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):296-304. |
| [7] | 杜忠泽,李萍,符寒光,丰振军,冯奇.热处理对高钒高速钢组织和性能的影响[J].金属热处理,2009(05):32-34. |
| [8] | 符寒光,汪长安.高速钢轧辊的热处理工艺[J].金属热处理,2010(09):60-65. |
| [9] | 禹宝军,关小军,赵健,周兰聚,王丽君,刘千千.高性能桥梁钢A709M-HPS485wf动态再结晶临界条件的预测[J].材料热处理学报,2011(01):150-154. |
| [10] | Sluzalec A Jr .A preliminary analysis of temperatures within roll-forging dies,using a finite-element method[J].International Journal of Machine Tools and Manufacture,1984,24(03):171-179. |
| [11] | Ramzi Othman;Pierrick Guegan;Georges Challita;Franck Pasco;Daniel LeBreton .A Modified Servo-hydraulic Machine For Testing At Intermediate Strain Rates[J].International journal of impact engineering,2009(3):460-467. |
| [12] | Yi Liu;Rui Hu;Jinshan Li;Hongchao Kou;Hongwei Li;Hui Chang;Hengzhi Fu .Characterization of hot deformation behavior of Haynes230 by using processing maps[J].Journal of Materials Processing Technology,2009(8):4020-4026. |
| [13] | H. Farnoush .Hot deformation characteristics of 2205 duplex stainless steel based on the behavior of constituent phases[J].Materials & design,2010(1):220-226. |
| [14] | Michel J P;Jonas J J .Precipitation kinetics and solute strengthening in high temperature austenites containing A1 and N[J].Acta Metallurgica,1981,29(03):513-526. |
| [15] | M ecking H;Kocks U F .Kinetics of flow and strain-hardening[J].A cta Metallurgica,1981,29(11):1865-1875. |
| [16] | S.F.MEDINA;C.A.HERNANDEZ .GENERAL EXPRESSION OF THE ZENER-HOLLOMON PARAMETER AS A FUNCTION OF THE CHEMICAL COMPOSITION OF LOW ALLOY AND MICROALLOYED STEELS[J].Acta materialia,1996(1):137-148. |
| [17] | H. Mirzadeh;A. Najafizadeh .Extrapolation of flow curves at hot working conditions[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(7/8):1856-1860. |
| [18] | R. Ebrahimi;S.H. Zahiri;A. Najafizadeh .Mathematical modelling of the stress-strain curves of Ti-IF steel at high temperature[J].Journal of Materials Processing Technology,2006(2):301-305. |
| [19] | Momeni, A.;Arabi, H.;Rezaei, A.;Badri, H.;Abbasi, S.M. .Hot deformation behavior of austenite in HSLA-100 microalloyed steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(4/5):2158-2163. |
| [20] | 张丁非,方霖,段红玲,戴庆伟.ZM61镁合金的热变形行为[J].材料热处理学报,2011(04):25-29. |
| [21] | Yang J H;Liu Q Y;Sun D B et al.Recrystallization behavior of deformed austenite in high strength micro-alloyed pipehne steel[J].Journal of Iron and Steel Research International,2009,16(01):75-80. |
| [22] | 雍歧龙;马鸣图;吴宝榕.微合金钢-物理和力学冶金[M].北京:机械工业出版社,1989:209,341. |
| [23] | SANG-HYUN CHO;YEON-CHUL YOO .Hot rolling simulations of austenitic stainless steel[J].Journal of Materials Science,2001(17):4267-4272. |
| [24] | Sellars C M.Hot Rolling and Forming Processes[M].London:the Metals Society,1980 |
| [25] | Laasroui A;Jonas J J .Recrystallization of austenite after deformation at high temperatures and strain rates-analysis and modeling[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22(01):151-160. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%