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以轴承钢GCr15为研究对象,研究了热变形及冷却过程中工艺参数对珠光体组织转变的影响。研究发现:高温变形促进了轴承钢在连续冷却过程中珠光体的转变,随变形量增加,珠光体的开始析出温度升高,珠光体球团直径和片层间距减小;随变形温度降低,珠光体球团直径减小,而珠光体片层间距呈增大趋势;随热变形后连续冷却速度增加,珠光体开始析出温度降低,珠光体球团直径和片层间距减小,冷却速度增大到6℃/s时有退化珠光体生成。
Taking the bearing steel GCr15 as the research object, the influence of the technological parameters on the transformation of the pearlite during the heat deformation and cooling process was studied. The results show that the high temperature deformation promotes the transformation of pearlite during the continuous cooling of bearing steel. With the increase of deformation, the initial precipitation temperature of pearlite increases, and the diameter and spacing of pearlite pellets decrease. With the decrease of deformation temperature, The diameter of pearlite pellets decreases, while the spacing of pearlite sheets increases. With the continuous cooling rate after hot deformation, the precipitation temperature of pearlite decreases, the diameter and spacing of pearlite pellets decrease, and the cooling rate increases As large as 6 ℃ / s degenerated pearlite generation.