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处理参数对在使用激光粉床融合技术制造的恒星石-6在热同静压缩过程中的再结晶的影响

Soumya Sridar¹, Xavier Jimenez², Albert C To²

¹Physical Metallurgy and Materials Design Laboratory, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA.

Materials (Basel, Switzerland)

|November 27, 2024

概括

激光粉床融合成功制造了无裂纹的Stellite-6合金. 通过热静态压力 (HIP) 进行后加工,保持了出色的微硬度,证明了先进材料制造的潜力.

科学领域:

材料科学材料科学材料科学
添加剂制造添加剂制造添加剂制造
金工业是一种金工业.

背景情况:

立体-6合金在高磨损应用中至关重要.
激光粉末床融合 (LPBF) 提供了先进的制造可能性.
通过LPBF实现无裂纹的Stellite-6需要精确的工艺控制.

研究的目的:

使用LPBF与加热模块制造无裂纹的Stellite-6合金.
为了研究不同LPBF参数对微观结构的影响.
评估热同静压 (HIP) 对合金性能的影响.

主要方法:

带有加热构造板 (400°C) 的LPBF,以建立加工窗口.
使用两个参数集打印Stellite-6立方体 (样本A:300 W/750 mm/s,样本B:275 W/1000 mm/s).
用as打印和HIP处理的样品 (1250°C,150MPa,2小时) 的微结构分析和特征.

主要成果:

制造了无裂纹的Stellite-6,表现出具有M7C3和富含W的M6C粒子的FCC-Co树突.
观察到气体孔,需要HIP进行密集.
在样本A (部分) 和样本B (完整) 中,HIP诱导了不同的再结晶行为,影响了M7C3的粗化.
在HIP后的微硬度与造的恒星石-6.6相当.

结论:

带有加热模块的LPBF是无裂纹的Stellite-6制造的可行方法.
处理参数显著影响即建微结构和HIP后再结晶.
高密度聚合物有效地使合金变密,而不损害其微硬度,使其适用于苛刻的应用.

关键词:

卡尔法达 (CALPHAD) 是一个字.在M7C3中,M7C3是M7C3.谢尔·谢尔·谢尔是什么意思谷物生长的增长谷物生长的增长多孔性多孔性

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