研究目的
Investigating the relationship between welding parameters and the mechanical properties of laser welded joints.
研究成果
The CO2 laser welded joints met the required hardness standards without crack propagation, unlike the Nd:YAG laser welded joints which exhibited cracks. The hardness was highest in the joint area due to the mixed chemical composition of the steels. CO2 laser welding is recommended for the tested samples under the used parameters.
研究不足
The study was limited to two types of lasers and two types of steels. The presence of cracks in Nd:YAG laser welded joints and the variability in hardness due to mixed chemical compositions were noted as areas for further investigation.
1：Experimental Design and Method Selection:
The study involved welding joints using two different laser welding processes (CO2 laser and Nd:YAG laser) with varying parameters to examine their effects on joint mechanical properties.
2：Sample Selection and Data Sources:
Two different steels (austenitic stainless steel and low carbon steel) were joined. The chemical compositions of the steels were provided.
3：List of Experimental Equipment and Materials:
CO2 laser and Nd:YAG laser were used for welding. Protective gases (M20 and CO2) were employed during the processes.
4：Experimental Procedures and Operational Workflow:
Welding was performed with specific parameters for each laser type, followed by hardness testing and microscopy of the welded joints and heat affected zones.
5：Data Analysis Methods:
Hardness tests (HV10) were conducted on the welded joints and HAZ, and results were compared to required standards.
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