摘要
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1273～1373 K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1173～1473 K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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第7期94-99,共6页
Transactions of Materials and Heat Treatment
基金
江西省教育厅产学研合作项目(GJJ09001)
国家科技重大专项项目(2007BAE51B03-6)
江西省省科技厅项目(2008BA10800)
关键词
非调质钢
力学性能
控轧控冷
组织
non-quenched and tempered steel
mechanical property
thermo mechanical control process （TMCP）
microstructure.
