Tailoring cementite precipitation and mechanical properties of quenched and tempered steel by nickel partitioning between cementite and ferrite
Tailoring cementite precipitation and mechanical properties of quenched and tempered steel by nickel partitioning between cementite and ferrite
复制标题
通过渗碳体和铁素体之间的镍分配来调节调质钢的渗碳体析出和力学性能
DOI：
10.1016/j.msea.2020.140686
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发表时间：
2020-12
期刊：
影响因子：
6.4
通讯作者：
Liu C. -M.
中科院分区：
文献类型：
--
作者：
An F. -C.;Wang J. -J.;Zhao S. -X.;Liu C. -M.
研究了 Ni 对调质 Cr-Ni-Mo 钢渗碳体演变和力学性能的影响。拉伸和夏比冲击试验结果表明，增加Ni含量对于提高低温冲击韧性比提高屈服强度和拉伸强度更有效。实验观察表明，Ni有利于渗碳体细化，但对细化淬火马氏体组织和回火有效晶粒尺寸几乎没有影响。此外，对渗碳体和相邻铁素体的能量色散光谱（EDS）和热力学研究表明，Ni分配导致在铁素体/渗碳体界面处形成富Ni层，从而延缓渗碳体生长。为了阐明Ni对冲击韧性、屈服强度和抗拉强度的不同影响，详细分析了渗碳体细化在强化和增韧机制中的作用。
The effect of Ni on the evolutions of cementite and mechanical properties in quenched and tempered Cr–Ni–Mo steel was investigated. The results of tensile and Charpy impact tests showed that an increase in the Ni content was more effective in improving the low-temperature impact toughness than in increasing yield and tensile strengths. Experimental observations revealed that Ni was beneficial to cementite refinement but had almost no impact on refining the sizes of both the quenched martensite structure and tempered effective grain size. Further, energy dispersive spectrometry (EDS) and thermodynamic studies on cementite and adjacent ferrite indicated that Ni partitioning resulted in the formation of a Ni-rich layer at the ferrite/cementite interface and thereby retarded cementite growth. In order to clarify the different effects of Ni on the impact toughness and yield and tensile strengths, the role of cementite refinement in strengthening and toughening mechanisms was analyzed in detail.
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