论文部分内容阅读
结合实际生产S35C成分精冲钢,讨论了亚共析热轧钢板片状渗碳体的退火球化行为及转变机制,并采用Gleeble热模拟试验机研究了热轧和冷轧变形量对精冲钢片状渗碳体快速球化效果的影响。结果表明,与850℃30%应变量相比,60%大变形量可有效细化组织,促进层片状珠光体断裂,显著加快热轧板球化速率,提高粒状渗碳体的均匀分布。冷轧大变形也有利于片状渗碳体的快速球化退火,但50%过高应变量会导致钢板退火后难以消除加工硬化,S35C精冲钢冷轧合适的变形量约在40%。
Combined with the actual production of refined steel S35C composition, discussed the sub-eutectoid hot-rolled sheet lamellar cementite annealing and transformation mechanism and the use of Gleeble thermal simulation test machine to study the hot and cold rolling deformation of fine blanking Effect of rapid spheroidization of steel lamellar cementite. The results show that compared with the 30% strain at 850 ℃, the 60% deformation can effectively refine the microstructure and promote the lamellar pearlite fracture. It can significantly accelerate the hot rolling ball nodularization rate and improve the uniform distribution of granular cementite. Large deformation of cold rolling is also beneficial to the rapid spheroidizing annealing of lamellar cementite. However, an excessively high strain of 50% will make it difficult to eliminate work hardening after annealing. The suitable deformation of S35C precision cold rolling is about 40%.