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采用电镜、X射线衍射仪对淬回火后的20Cr11MoVNbNB热强钢,经不同温度长期时效后的组织和性能研究表明:该钢的强度、硬度与时效温度、时间的综合参数P之间具有两段斜率不同的线性关系;该钢的强度、硬度与主要强化相M_(23)C_6、MC的统计平均尺寸(?)_(M_(23)C_6)、(?)_(MC)之间也存在着两段斜率不同的线性关系。
The microstructure and mechanical properties of 20Cr11MoVNbNB hot-rolled steel after quenched and tempered by using electron microscope and X-ray diffractometer after long-term aging at different temperatures show that the strength, hardness and aging temperature of the steel have two The relationship between the strength and hardness of the steel and the statistical average size (M_ (23) C_6) and (MC) of the main strengthening phase M_ (23) C_6 and MC There are two different slopes linear relationship.