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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。
The influence of different controlled rolling process parameters on the microstructures of non-quenched and tempered steel was studied. The different cooling and cooling technologies were used to cool the non-quenched and tempered steel parts. The optimized non-quenched and tempered steel controlled rolling and controlled cooling technology. The results show that the local strengthening control cooling technology can improve the mechanical properties of the parts notably. At 1273 ~ 1373 K, with the increase of strain ε within 0.22 ~ 1.61, the original austenite The grain size is gradually refined from 26 ~ 12μm, the peak strain is about 0.3 under this condition; with the decrease of the deformation temperature, the deformation resistance increases and the peak strain increases with the decrease of the deformation temperature in the range of 1173 ~ 1473 K, The grain size of the austenite decreases gradually from 20μm to 11μm. With the increase of forging ratio and local air cooling, the F40MnV steel can obtain better mechanical properties.