论文部分内容阅读
采用Gleeble-1500热模拟试验机、金相显微镜、扫描电镜研究了低温轧制时变形温度对GCr15轴承钢组织的影响规律。结果表明,700、750℃变形时网状碳化物形貌为断续状,珠光体团尺寸较小、片层间距较小,有利于缩短球化退火时间和碳化物的溶解;800、850℃变形时网状碳化物为半断续状,珠光体团较为均匀、片层较细,有利于退火过程中的碳化物溶解;900℃变形时网状碳化物为全连续状,珠光体团均匀,但尺寸较大,需要快速冷却以抑制碳化物的析出。
The influence of deformation temperature on the microstructure of GCr15 bearing steel during low temperature rolling was studied by Gleeble-1500 thermal simulation tester, optical microscope and scanning electron microscope. The results show that the morphologies of the network carbides are discontinuous at 700 and 750 ℃, the pearlite size is small and the spacing of the lamellae is small, which is beneficial to shorten the annealing time and dissolve carbides; Meshed carbide is semi-intermittent deformation, pearlite group is more uniform, thin layer, is conducive to the dissolution of the carbide during the annealing process; 900 ° C deformation mesh carbides are all continuous, pearlite uniform , But larger in size, requires rapid cooling to inhibit the precipitation of carbides.