研究了不同的控轧工艺参数对非调质钢组织结构的影响规律，并在非调质钢零件不同部位采用强化控冷技术进行锻后冷却，得到了优化的非调质钢控轧控冷技术。结果表明：非调质钢转向节零件局部强化控冷技术能显著提高零件局部的综合力学性能；在1273～1373K下，随着应变量ε在0．22～1．61内增加，实验钢原奥氏体晶粒从26～12μm逐渐细化，在该条件下峰值应变约为0．3；在1173～1473K范围内随着变形温度的降低，变形抗力增大，峰值应变也随之增大，材料原奥氏体晶粒尺寸在20～11μm内逐渐减小；在增大锻压比和局部风冷两种工艺配合下，F40MnV钢可获得较好的综合力学性能。
Effect of thermo-mechanical control process （TMCP） on microstructure and mechanical properties of a non-quenched and tempered steel were discussed. The optimum controlled cooling technique to F40MnV steel steering knuckle after forging was obtained by forced-air cooling at local places. The results show that the local controlled cooling process can efficiently enhance the mechanical properties of the steering knuckle. When the forging temperature ranges from 1273 to 1373 K, grain size of the steel gradually refines from 26 to 12 μm with increasing strain from 0.22 to 1.61. With decreasing of forging temperature at 1173-1473 K, the deformation resistance of the non-quenched and tempered steel increases and its grain size is refined from 20 to 11 μm. The mechanical properties of F40MnV non-quenched steel can be efficiently improved by the combination of increasing forging ratio and local controlled cooling technique.
参考文献
| [1] | 常开地,王萍,刘卫萍.非调质钢的发展现状和应用进展[J].金属热处理,2011(03):80-85. |
| [2] | 王进,褚忠,陈军.非调质钢奥氏体动态再结晶研究[J].材料导报,2010(22):116-118. |
| [3] | 张贤忠,蔡启舟,陈庆丰,周桂峰,熊玉彰.汽车裂解连杆用高强度非调质钢组织和性能的研究[J].钢铁研究,2011(01):15-17. |
| [4] | Naylor D J .Microalioyed forging steels[J].Materials Science Forum,1998,284-286:83-94. |
| [5] | 杨洪根,崔庆红.非调质钢在工程机械上的运用及评价[J].工程设计学报,2004(04):228-230. |
| [6] | 吴元徽.浅析非调质钢的应用前景[J].机械制造,2009(09):66-67. |
| [7] | 颜峰,杨伟宁,蒋鹏.非调质钢曲轴锻造热模拟试验分析[J].锻压技术,2010(04):16-21. |
| [8] | 常开地,许晓东,崔京玉,王坚,杨卫中,王国瑞.转炉-精炼-连铸法生产YF40MnV非调质钢的组织与性能[J].金属热处理,2004(05):23-26. |
| [9] | 王晓丽,宋波,焦国利.轧制变形对U75V重轨钢珠光体片层间距的影响[J].特殊钢,2008(06):52-54. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%