由于非等温高温变形流程与实际的直接热冲压过程相似,利用Gleeble 3500热/力模拟试验平台,对硼钢B1500HS的高温非等温变形性能进行了研究,获得了B1500HS在不同变形温度和应变速率下的流动应力曲线.研究结果显示:硼钢B1500HS高温非等温变形时的峰值应力明显高于等温变形时的峰值应力.随着变形温度的升高和应变速率的减小,B1500HS的高温流动性能增强.当变形温度高于800℃时,材料成形时的加工硬化率降低,成形性较好;应变速率高于10 s-1时,材料成形时的加工硬化率也降低.
参考文献
| [1] | (A)KERSTR(O)M P .Numerical simulation of a thermo-mechanical sheet metal forming experiment[D].Sweden:Lule(a) University of Technology,2006. |
| [2] | 刘仁东,郭金宇,王福.鞍钢高强汽车用钢研发进展[J].上海金属,2013(04):47-52. |
| [3] | Norrbottens Jaernwerk A B .Manufacturing a steel article[P].GB,1490535,1977. |
| [4] | 徐伟力,艾健,罗爱辉,管曙荣.钢板热冲压新技术介绍[J].塑性工程学报,2009(04):39-43. |
| [5] | 孙彩娜,张梅,邵光杰,张恒华.高强度22MnB5钢板加热过程中组织演变规律的研究[J].上海金属,2013(02):12-16,26. |
| [6] | Abbasi, M.;Saeed-Akbari, A.;Naderi, M..The effect of strain rate and deformation temperature on the characteristics of isothermally hot compressed boron-alloyed steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:356-363. |
| [7] | Nikravesh, M.;Naderi, M.;Akbari, G.H..Influence of hot plastic deformation and cooling rate on martensite and bainite start temperatures in 22MnB5 steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:24-29. |
| [8] | Junying Min;Jianping Lin;Yong'an Min .Effect of thermo-mechanical process on the microstructure and secondary-deformation behavior of 22MnB5 steels[J].Journal of Materials Processing Technology,2013(6):818-825. |
| [9] | 李辉平,赵国群,贺连芳,张磊.热冲压硼钢B1500HS高温本构方程的研究[J].机械工程学报,2012(08):21-27. |
| [10] | M. Merklein;J. Lechler;M. Geiger .Characterisation of the Flow Properties of the Quenchenable Ultra High Strength Steel 22MnB5[J].CIRP Annals,2006(1):220-223. |
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