Yu Qian, Zhao Yuliang, Zhao Feiyu
The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110189, China.
Materalia Group, Department of Physical Metallurgy, Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC), Av. Gregorio del Amo 8, 28040 Madrid, Spain.
Materials (Basel). 2024 May 17;17(10):2423. doi: 10.3390/ma17102423.
The effects of adding nickel on the phase transition temperature, microstructure, and mechanical properties of medium-carbon spring steel have been investigated. The results show that adding nickel reduces the martensite start () temperature, improves hardenability, and refines the sub-microstructure of the martensite, thereby improving yield stress. The yield strength of martensitic steel increases by approximately 100 MPa due to a synergistic combination of grain refinement strengthening and dislocation strengthening, with an increase in the nickel content from 0 wt.% to 1 wt.%. The cryogenic impact toughness of martensitic steel also improved with a higher nickel content due to packet and block refinement and an increase in the proportion of high-angle grain boundaries (HAGBs).
研究了添加镍对中碳弹簧钢相变温度、微观结构和力学性能的影响。结果表明，添加镍降低了马氏体开始转变（Ms）温度，提高了淬透性，并细化了马氏体的亚微观结构，从而提高了屈服应力。由于晶粒细化强化和位错强化的协同作用，随着镍含量从0 wt.%增加到1 wt.%，马氏体钢的屈服强度提高了约100 MPa。由于板条束和块体细化以及大角度晶界（HAGBs）比例的增加，马氏体钢的低温冲击韧性也随着镍含量的增加而提高。
