提高双相钢的机械性能通过多轴压缩和关键间回火
Pooja Dwivedi1, Aditya Kumar Padap2, Sachin Maheshwari3
1Department of Mechanical Engineering, Inderprastha Engineering College, Ghaziabad 201010, Uttar Pradesh, India.
Materials (Basel, Switzerland)
|July 12, 2025
概括
多轴压缩 (MAC) 处理提炼双相 (DP) 钢微结构,显著提高硬度和强度. 这种方法对汽车应用中的高性能钢具有前景.
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.
- 机械工程 机械工程
背景情况:
- 双相 (DP) 钢提供了强度和可塑性的独特组合.
- 优化DP钢的性能对于汽车零部件等苛刻的应用至关重要.
- 严重塑性变形 (SPD) 技术可以进一步提高材料性能.
研究的目的:
- 研究多轴压缩 (MAC) 对中碳双相钢 (AISI 1040) 微观结构,机械性能和磨损行为的影响.
- 评估MAC加工在开发用于轻型汽车应用的先进钢材方面的潜力.
主要方法:
- 中碳双相钢 (AISI 1040) 采用500°C的多轴压缩 (MAC) 后的临界间化处理.
- 使用光学显微镜进行微结构分析.
- 机械性能 (硬度,抗拉强度) 通过机械测试进行评估.
- 评估了磨损行为,并进行了断层分析.
主要成果:
- 经过MAC加工,DP钢的颗粒大小从66±4μm大幅提升至18±1μm,经过9次通过后.
- 硬度从145 ± 9 HV增加到298 ± 18 HV,最终抗拉强度从557 ± 33 MPa增加到738 ± 44 MPa.
- 与化状态相比,化和MAC处理的样本都显示出优越的耐磨性,DP0的耐磨性略高于DP9,这是由于DP9.9中的马氏体碎片化导致的.
结论:
- 多轴压缩 (MAC) 是一种有效的方法,可以显著提高双相钢的机械性能.
- 由MAC引起的精细微观结构和应变硬化有助于提高硬度和抗拉强度.
- 经过MAC加工的DP钢具有高性能应用的潜力,特别是在汽车行业,因为其改善了机械和磨损特性.
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