通过在现场复合材料中对矩阵微结构的适应性调整诱导的增强硬度-性平衡
Mingjuan Zhao1,2, Xiang Jiang1,2, Yumeng Guan1,2
1Key Laboratory of Advanced Materials for Vehicles and Laser Additive Manufacturing of Nanchang City, East China Jiaotong University, Nanchang 330013, China.
Materials (Basel, Switzerland)
|June 28, 2023
概括
直接激光沉积创造了先进的贝尼特钢复合材料. 这些材料表现出更好的硬度和性平衡,这对于高速铁路转至关重要.
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
- 增材制造 增材制造 增材制造
背景情况:
- 由于材料的硬度-性不足,铁路翻转表面的故障正在增加.
- 高速和重型铁路需求需要先进的材料解决方案.
研究的目的:
- 在现场制造使用直接激光沉积 (DLD) 的WC初级增强的贝尼特钢矩阵复合材料.
- 研究适应性微结构调整及其对这些复合材料硬度强度平衡的影响.
主要方法:
- 直接激光沉积 (DLD) 的WC强化贝尼特钢粉.
- 分析微结构演变,阶段组成和强化形成.
- 评估微硬度和冲击性性能.
主要成果:
- 增加的WC含量导致了适应性的微结构变化,包括从状贝尼特转移到针状下贝尼特和保留的奥氏体.
- 在现场观察到Fe3W3C和WC增强物的形成.
- 微硬度随着WC含量增加,而冲击性降低,但与传统复合材料相比,整体硬度-性平衡有所改善.
结论:
- 通过DLD,可以在现场制造具有增强硬度-度平衡的贝尼特钢基质复合材料.
- 适应性微观结构调整是实现优越材料性能的关键,以满足铁路转等苛刻应用的要求.
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