The welding effect of laser welding machine in the field of thin plate is very outstanding, but due to improper operation or incomplete process, porosity often occurs in the welding process. Provide corresponding solutions. 1. When using argon as the protective gas:

The inside of the laser welded small hole is in an unstable vibration state. The flow of the small hole and the molten pool is very violent. The metal vapor inside the small hole erupts outwards, causing a steam eddy current at the opening of the small hole, and the protective gas is drawn into the bottom of the small hole. , these shielding gases will enter the molten pool in the form of bubbles as the orifice moves forward. When using argon gas for auxiliary welding, due to the low solubility of argon gas, the cooling rate of laser welding is very fast, and the air bubbles cannot escape in time and remain in the weld to form pores. 2. When nitrogen is used as protective gas:

The appearance of pores in the laser welding process is mainly caused by insufficient protective measures. During the welding process, if nitrogen is used to assist welding, nitrogen invades the molten pool from the outside, and the solubility of nitrogen in liquid iron is different from that of nitrogen in solid iron. Therefore, during the cooling and solidification process of the metal; since the solubility of nitrogen decreases with the decrease of temperature, when the molten pool metal cools to the point where it begins to crystallize, the solubility will drop sharply and suddenly, and a large amount of gas will be precipitated at this time. For air bubbles, if the upward speed of the air bubbles is lower than the crystallization speed of the metal, pores will be formed.

When the laser welding machine is processing, the laser welding machine needs to blow the shielding gas along the coaxial fiber to prevent the oxidation of the welding seam or prevent the gas splashing after the material dissolves from contaminating the lens. The generation of pores is mostly caused by improper use of shielding gas or errors in operation during laser welding. The reasons for pores appearing in different shielding gases are slightly different.

Jinan Gold Mark CNC Machinery Co., Ltd. is a high-tech industry enterprise specialized in researching, manufacturing and selling the machines as follows: Laser Engraver, Fiber Laser Marking Machine, CNC Router. The products have been widely used in advertisement board, crafts and molding, architecture, seal, label, woodcutting and engraving, stonework decoration, leather cutting, garment industries, and so on. On the base of absorbing the international advanced technology, we provide the clients the most advanced production and perfect after-sale service. In recently years, our products have been sold not only in China, but also as far as Southeast Asia, Middle east, Europe, South America and other overseas Markets.

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