研究目的
Investigating the effects of heat treatment on the microstructure and mechanical properties of Tribaloy 400 coatings deposited by laser cladding.
研究成果
The study concludes that heat treatment significantly affects the microstructure and mechanical properties of Tribaloy 400 coatings. The hardness and wear resistance are improved after heat treatment at 1250 °C for 1 h, but decrease after further heat treatment at 900 °C for 4 h. The wear resistance at high temperature is better than at room temperature due to the increased hardness of the Laves phase with temperature.
研究不足
The study focuses on the effects of heat treatment on Tribaloy 400 coatings deposited by laser cladding, with specific heat treatment conditions. The findings may not be directly applicable to other materials or heat treatment methods.
1：Experimental Design and Method Selection:
The study involved preparing Tribaloy 400 coatings on 304 stainless steel using laser cladding, followed by two different heat treatment methods to analyze their effects on microstructure and mechanical properties.
2：Sample Selection and Data Sources:
The substrate was AISI 304 stainless steel, and the powder was Tribaloy 400 alloy. The samples were cut into different sizes for microstructure observation and wear resistance tests.
3：List of Experimental Equipment and Materials:
Laser cladding machine (Model HWL-R2000AW), scanning electron microscope (Model Sigma04-01, ZEISS, Germany), energy-dispersive x-ray analysis unit (EDS), x-ray diffraction (XRD) using CuKa radiation (Ultima IV, Rigaku Corp., Japan), microhardness tester (HXD-1000TMC/LCD), nanohardness machine (Model NHT2, CSM Instruments, Switzerland), ball-on-disk friction wear testing machine (HT-1000 tester), and analytical balance (Model FA1204B, YuePing Co., Ltd Shanghai).
4：Experimental Procedures and Operational Workflow:
The laser cladding samples were heat treated by two different methods (HTA and HTB) and analyzed for microstructure, microhardness, nanohardness, and wear resistance.
5：Data Analysis Methods:
The microstructure and element composition were studied by SEM with EDS, phase composition by XRD, microhardness by microhardness tester, nanohardness by nanoindentation, and wear behavior by wear testing machine.
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