研究目的
The characterization of a laser weld joint of TRIP steel sheet manufactured by Nd:YAG laser welding was investigated, and the influence of welding conditions like angle of weld, power of laser, and welding speed on the strength of the joint was measured.
研究成果
Nd:YAG laser welding presented reasonable results in TRIP steel within the optimum parameters. The strength of the joint increased by 11% when the power was kept constant at 1800 W and the velocity was varied from 25 to 30 mm/s. The microhardness distribution was lower in the fusion zone and heat-affected zone, with higher values in the HAZ indicating greater heat dissipation.
研究不足
The study focused on the effect of power and velocity on the weld joint strength and microhardness, but did not explore other potential variables such as different materials or welding techniques.
1：Experimental Design and Method Selection:
The study involved laser welding of TRIP steel sheets using a Nd:YAG laser power welding system with varying power and velocity parameters.
2：Sample Selection and Data Sources:
High-strength TRIP 500 grade steel plates were used, with dimensions of 200×20×2 mm3.
3：List of Experimental Equipment and Materials:
A GmbH 56218 series laser machine with a maximum power of
4：5 kW and ABB six axis robot arms were used for welding. Experimental Procedures and Operational Workflow:
Welding was performed with parameters including welding speed of 25 mm/s, power of 2000 W, beam diameter of
5：6 mm, and a focal distance of 113 m. Data Analysis Methods:
Microstructure characterization was carried out using optical microscopy and field-emission scanning electron microscopy. Tensile testing was performed using an SAR Testing System.
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