研究马氏体不钢的结构性质和耐磨性
Alok Bhadauria1, K Venkateswara Reddy2, Rajesh K Khatirkar3
1Department of Mechanical and Industrial Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, Karnataka, India.
PloS one
|November 19, 2024
概括
这项研究研究了AISI 410和AISI 420马氏体不钢,揭示了在炼过程中碳化物沉增强了耐磨性. 与AISI 420相比,AISI 410的磨料磨损性能表现优越.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 部落学 (tribology) 是一个学科.
背景情况:
- 马氏体不钢 (MSS) 在需要高强度和耐磨性应用中至关重要.
- 了解热处理对微观结构和磨料磨损的影响对于优化性能至关重要.
研究的目的:
- 分析AISI 410和AISI 420马氏体不钢的微观结构演变和磨损磨损行为.
- 研究硬化和钢化对这些钢的机械性能和磨损机制的影响.
主要方法:
- 光学显微镜和扫描电子显微镜 (SEM) 用于微观结构分析.
- 能量分散光谱 (EDS) 和X射线衍射 (XRD) 用于元素和相位识别.
- 磨损磨损测试,以评估材料损失和磨损机制.
主要成果:
- 热处理影响了硬度,在723K时由于 (Fe,Cr) 23C6碳化物形成而显著增加,在873K时下降.
- AISI 410 呈现了马氏体结构,而 AISI 420 显示了经过炼后更粗的碳化物沉物.
- 通过XRD证实了碳化物 (Cr3C2,Mo2C) 的形成,这与通过碳和分离改善的耐磨性有关.
- 与AISI 420相比,AISI 410的磨损质量较低,其磨损机制包括微裂纹,耕和沟形成.
结论:
- 碳化物沉和合金元素的分离显著影响马氏体不钢的磨损耐磨性.
- 在散装硬度和磨损耐磨性之间没有发现直接相关性.
- 由于其特定的微观结构特征和磨损机制,AISI 410显示出比AISI 420更高的磨损磨损性能.
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