研究目的
To analyze the microstructure and wear resistance of Cu90Fe10 immiscible composites when two different spot sizes were adopted during laser powder deposition (LPD).
研究成果
The immiscible composite with the spot size of 2 mm demonstrates higher microhardness and wear resistance than the immiscible composite deposited with the spot size of 4 mm and Brass. The immiscible composite deposited with the spot size of 2 mm exhibits higher corrosion resistance in comparison with the Cu90Fe10 immiscible composite deposited with the spot size of 4 mm, due to stronger passivation behavior.
研究不足
The study focuses on the effect of spot size on the microstructure and properties of Cu90Fe10 immiscible composites. The scope of potential applications is limited due to buoyancy-driven separation at the macroscale during solidification, resulting in macrosegregation or delamination.
1：Experimental Design and Method Selection:
The homogeneous Cu90Fe10 immiscible composites were produced by LPD with different spot sizes (2 mm and 4 mm in diameter). The same laser specific energy was adopted during LPD.
2：Sample Selection and Data Sources:
Low carbon A3 steel was used as the substrate. Cu90Fe10 alloy powders were prepared in a planetary ball-mill machine.
3：List of Experimental Equipment and Materials:
A laser powder deposition system (TruDiode 4006, Germany) was used. Ar gas was used to protect the molten pool.
4：Experimental Procedures and Operational Workflow:
The experiments were conducted using a laser powder deposition system with two kinds of spot sizes under the same laser specific energy.
5：Data Analysis Methods:
The microstructure was observed by SEM and TEM. The microhardness was measured using a Vickers-1000 tester. The wear resistance and friction coefficient were tested using a block-on-ring wear test machine.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
