研究目的
Investigating the effects of multicomponent (Ni+Cr+B4C) laser boriding on the microstructure, microhardness, ductility, and toughness of AISI 1020 steel.
研究成果
Laser boriding with multicomponent mixtures produces thick, uniform, and non-acicular boride layers on AISI 1020 steel, improving ductility and toughness, especially at higher energy densities. The process also reduces hardness scatter and enhances the distribution of alloying elements in the boride layer.
研究不足
The study is limited to AISI 1020 steel and specific multicomponent mixtures. The effects of varying other parameters like laser power or scanning speed beyond the tested ranges are not explored.
1：Experimental Design and Method Selection:
The study involves laser boriding of AISI 1020 steel with a multicomponent mixture (Ni+Cr+B4C) at varying energy densities.
2：Sample Selection and Data Sources:
AISI 1020 grade commercially available cold rolled plain carbon steel is used as the base specimen.
3：List of Experimental Equipment and Materials:
Laser boriding setup, electroplating equipment for nickel and chromium coating, B4C paste, and optical microscope for microstructure analysis.
4：Experimental Procedures and Operational Workflow:
Nickel and chromium are electroplated on the steel, followed by application of B4C paste. Laser boriding is then performed at different energy densities.
5：Data Analysis Methods:
Microstructure analysis, microhardness measurements, and charpy impact tests are conducted to evaluate the effects of laser boriding.
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