风电齿轮箱用100CrMo7-3轴承钢的奥氏体晶粒长大规律及模型构建

doi:10.13251/j.issn.0254-6051.2025.05.010

摘要/Abstract

摘要： 对风电齿轮箱用100CrMo7-3轴承钢在不同加热温度(920~1150 ℃)和保温时间(0~600 min)下的奥氏体晶粒长大行为进行了研究;采用金相定量法测量了奥氏体晶粒尺寸。采用Sellars模型,通过反复试探法建立了100CrMo7-3轴承钢的奥氏体晶粒长大模型。基于实际生产条件下工件各位置的奥氏体晶粒尺寸,采用DEFORM有限元软件计算出了工件各位置“0”时刻的奥氏体晶粒尺寸及随保温时间的变化规律。结果表明,1000 ℃以下保温时,奥氏体晶粒长大速率较慢,当加热温度大于1100 ℃时,奥氏体晶粒快速长大;同一加热温度下,保温的前30 min内晶粒长大迅速,30 min以后晶粒长大速率逐渐减慢。通过试验数据拟合出的100CrMo7-3轴承钢奥氏体晶粒长大模型为:D^5.02_t-D^5.02₀=7.77×10³⁶texp-764 980RT。工业条件下由于试样尺寸的影响,现场工件的奥氏体晶粒尺寸比实验室小试样的偏大。在现场生产条件下的加热保温过程中,影响100CrMo7-3轴承钢奥氏体晶粒尺寸的首要因素是加热温度,保温时间的影响不大。

关键词: 100CrMo7-3轴承钢, 大型风电齿轮箱, 奥氏体晶粒长大模型

Abstract: Austenite grain growth behavior at different temperatures (920-1150 ℃) and holding time (0-600 min) of the 100CrMo7-3 bearing steel for wind power gearbox was studied. The austenite grain size was measured by metallographic quantitative method. The austenite grain growth model of the 100CrMo7-3 bearing steel was established by Sellars model and repeated trial method. Based on the austenite grain size at each position of the workpiece under actual production conditions, the austenite grain size at each position at “0” time of the workpiece and the change of austenite grain size with holding time were calculated by DEFORM finite element software. The results show that the austenite grain growth rate is slow when the heating temperature is below 1000 ℃, while the austenite grain growth rate is fast when the temperature is higher than 1100 ℃. At the same heating temperature, the grain growth is rapid during the first 30 min of holding, and gradually slows down after 30 min. The austenite grain growth model of 100CrMo7-3 bearing steel fitted by experimental data is as follows: D^5.02_t-D^5.02₀=7.77×10³⁶texp-764 980RT. Under industrial conditions, due to the influence of specimen size, the austenite grain size of on-site workpieces is larger than that of laboratory specimen. The primary factor affecting the austenite grain size of 100CrMo7-3 bearing steel during the heating and holding process under on-site production conditions is the heating temperature, but the effect of holding time is not significant.

Key words: 100CrMo7-3 bearing steel, large wind power gearbox, austenite grain growth model

中图分类号:

TG161

沈鑫珺, 王煜彬, 张永鹏, 杨军, 蒋鹏, 李帅傧, 时大方. 风电齿轮箱用100CrMo7-3轴承钢的奥氏体晶粒长大规律及模型构建[J]. 金属热处理, 2025, 50(5): 57-65.

Shen Xinjun, Wang Yubin, Zhang Yongpeng, Yang Jun, Jiang Peng, Li Shuaibin, Shi Dafang. Austenitic grain growth behavior and model construction of 100CrMo7-3 bearing steel for wind power gearbox[J]. Heat Treatment of Metals, 2025, 50(5): 57-65.

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