应变控制的热机械疲劳行为和微观结构进化机制的小说Cr-Mo-V热加工压钢
Yasha Yuan1,2,3, Yichou Lin2,3, Wenyan Wang1
1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
这项研究通过优化和含量,开发了MES 2钢,一种高性能热加工压钢. 与MES 1钢相比,MES 2钢具有优越的热力学疲劳性能和更长的寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 金工程 金工程 金工程
- 机械工程 机械工程
背景情况:
- 现有的55NiCrMoV7 (MES 1钢) 难以满足竞争激烈的模具和模具造市场的需求.
- 模具的严格规格需要先进的材料解决方案.
研究的目的:
- 通过调整 (Mo) 和 (V) 含量来优化MES 1钢的合金组成.
- 开发一种高性能,长寿命的热加工压钢 (MES2钢),具有增强的微观结构和热机械疲劳 (TMF) 性能.
主要方法:
- 系统地优化MES 1钢的合金组成.
- 在反向机械应变控制下进行热机械疲劳 (TMF) 测试 (0.6%和1.0%的应变水平).
- 使用扫描电子显微镜 (SEM),电子反射散射衍射 (EBSD) 和传输电子显微镜 (TEM) 的微结构性表征.
主要成果:
- 这两种钢在TMF循环中都表现出初始硬化和随后的软化.
- 与MES 1钢相比,MES 2钢的累积周期性软化损伤较少,裂较少,较小,TMF寿命明显更长.
- MES 1钢的Cr主导的碳化物变粗,导致应力度,而MES 2钢的分散的Mo和V含有的MC碳化物有效地抑制了脱位运动和谷物生长.
结论:
- 优化合金组合的MES 2钢,包括分散的MC碳化物,显著提高了热力学疲劳性能.
- MES 2钢为高性能,长寿命的热加工模具应用提供了可行的解决方案.
- 该研究成功地开发出了对MES 1钢的优质替代品,用于苛刻的工业应用.
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