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接后热处理对UHSS接头性能的影响
Mustafa Tümer1, Alptekin Kısasöz2, Florian Pixner3
1Welding Technology Program, Kocaeli University, 41001 Kocaeli, Türkiye.
Materials (Basel, Switzerland)
|June 27, 2025
概括
研究了用于超高强度钢 (UHSS) 的电子束 (EBW) 的接后热处理. 在接后直接火成功地恢复了EBW关节的优越强度和性.
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.
- 接工程 接工程
背景情况:
- 超高强度钢 (UHSS) 对于轻量设计和燃油效率至关重要.
- 诸如电子束接 (EBW) 这样的接工艺可能会损害高钢的机械性能,特别是性.
- 接后热处理 (PWHT) 对于恢复结构完整性和性能至关重要.
研究的目的:
- 研究各种接后热处理对电子束接S1100MC超高强度钢的微观结构和机械性能的影响.
- 确定最佳的热处理参数,以保持接接头的强度和性之间的平衡.
- 评估从奥氏体温度直接火的潜力,以实现优越的性能.
主要方法:
- 电子束接 (EBW) 的S1100MCUHSS.
- 在2小时内在500°C,650°C和750°C的温度下进行接后热处理,并进行炉冷却.
- 使用硬度,Charpy冲击和拉伸性测试进行微结构性表征.
- 从奥氏体温度直接火的评估.
主要成果:
- 500°C的热处理保持了硬度,而650°C导致硬度略微下降,750°C显著降低了硬度.
- 接后的快速冷却导致融合区和受热影响区域的性不足.
- 从奥氏体温度直接火成功地形成了新鲜的马氏体,产生了高硬度 (437 HV0.2),抗拉强度 (1345 MPa) 和延长 (>9%).
结论:
- 接后的热处理显著影响了电子束接的UHSS的机械性能.
- 在高温热处理后的炉子冷却导致硬度的损失.
- 从奥氏体温度直接火是一种有效的方法,可以在S1100MC钢的EBW接头中实现出色的强度和性.
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