Co-operative enhancement of mechanical properties and pitting corrosion performance for additively manufactured type 420 stainless steel with spherical tungsten carbides
作者
单位
1. Beijing Advanced Innovation Center for Materials Genome Engineering、Institute for Advanced Materials and Technology、University of Science and Technology Beijing、Beijing 100083、China 2. Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming、School of Materials Science and Engineering、Shanghai Jiao Tong University、Shanghai 200240、China 3. State Key Laboratory of Powder Metallurgy、Central South University、Changsha 410083、China 4. Metallurgy and Corrosion、Department of Materials、The University of Manchester、M13 9PL、Manchester、UK
关键词
收录来源
International Corrosion Congress · 第22届国际腐蚀大会
摘要
Our study combines type 420 stainless steel enhanced with spherical cast tungsten car bide (WC/W 2C) powder to produce laser powder bed (LPBF) fusion processed metal matrix composites (MMCs). The size of utilized raw powders for the additive manufacturing process was controlled, with the resulting LPBF Type 420 + 5 wt% WC/W2C microstructure consisting of austenite, martensitic, and W-rich carbides (WC/W2C, FeW 3C, M 6C, and M 7C3) ranging from nm-to m-length-scales. The spherical cast WC/W2C demonstrate d exceptional compressive strength and wear resistance. The incorporation of W and C from r einforced particles enhance d the resistance to pitting corrosion, resulting in WO3 and austenite phase formation. The underlying mechanisms contributing to the enhanced mechanical properties and corrosion resistance are d iscussed, offering valuable insight s to advance the application of MMCs through LPBF additive manufacturing routes.