How Does Laser Wire Affect Heat?

Laser welding is a high-energy-density welding technology that uses the heat generated by the laser beam to heat the workpiece, causing the metal material to melt and solidify, thereby achieving welding. As a supplement to welding materials, laser wire can have many effects on the heat during the welding process. The following are some of the main effects:

1. Heat Transfer Efficiency

The heat of laser welding is concentrated in the area irradiated by the laser beam. The addition of welding wire can affect the distribution of heat in the entire welding area. The additional addition of laser wire can increase the volume of the molten pool, thereby increasing the retention time of heat in the molten pool and helping to improve the quality of the weld.

2. Cooling Rate

The presence of laser wire affects the cooling rate of the weld joint. Generally, welding wire causes the heat dissipation rate of the molten pool to slow down, making the cooling process of the weld and surrounding areas more uniform and slow. This helps to reduce welding stress and crack formation in the heat-affected zone.

3. Welding Heat Input

Welding wires of different materials and diameters have a significant effect on welding heat input. When the heat input of the laser wire is relatively large, it can provide additional heat during the welding process and increase the depth and width of the molten layer, which is especially important in situations where higher welding strength is required.

4. Melting Behavior

The physical and chemical properties of the laser welding wire (such as composition and crystal structure) affect its melting behavior during laser welding. For example, some alloy welding wires can play the role of element diffusion and improve the mechanical properties of the welded joint.

5. Stability of the Weld Pool

The addition of laser laser wire can help stabilize the weld pool and prevent the weld pool from cooling too quickly or forming bubbles, thereby reducing the possibility of welding defects. The addition of welding wire material can further improve the fluidity and stability of the weld pool.

6. Welding Efficiency

The use of laser wire can improve welding efficiency and shorten welding time. Laser welding itself has the advantages of fast and precise, and the addition of laser welding wire can help achieve higher welding speeds and reduce processing costs.

Summary

In general, the effect of laser wire on heat during laser welding is reflected in many aspects, including heat transfer efficiency, cooling rate, welding heat input, melting behavior, and stability of the weld pool. Therefore, when performing laser welding, the rational selection and use of laser welding wire is crucial to improving welding quality and efficiency.

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