Natural gas metal welding and cutting fuel gas

Abstract

The invention discloses natural gas metal welding and cutting fuel gas, which is composed of liquefied natural gas, dimethyl ether and a combustion improver. The additive is composed of 99%-99.9% of a solvent and 0.1%-1% of a solute, wherein the solvent is gasoline, and the solute is cerium dioxide and sodium oleate. According to the natural gas metal welding and cutting fuel gas, the rare earth combustion improver used as the natural gas combustion improver is simple in component, is a neutral organic solution and has no corrosion to metal equipment, potential safety hazards caused by equipment corrosion after long-term use are avoided, after the rare earth combustion improver and the natural gas are evenly mixed, a catalytic combustion-supporting effect is achieved, sufficient combustion of the natural gas is facilitated, the combustion flame temperature can be increased to 3100-3400 DEG C, the cutting speed and the welding speed can be increased and the consumption of the natural gas can be reduced during gas flame cutting of the natural gas, meanwhile the gas flame temperature during combustion of the natural gas is increased, and the combustion speed, the cutting speed and the welding speed are increased by using the rare earth combustion improver.

Description

technical field [0001] The invention relates to the technical field of metal welding and cutting, in particular to a natural gas metal welding and cutting gas. Background technique [0002] The processing of metal materials is an indispensable technical means for the development of modern society and economy and modern life. Acetylene is widely used as a gas for welding and cutting in metal processing because it has a higher combustion temperature, is more convenient to obtain, and has a better use effect. [0003] However, in continuous exploration, people have found that natural gas can be used for cutting operations. Natural gas cutting and welding use the heat energy of natural gas combustion flames to preheat the metal at the cutting part of the workpiece to a certain temperature and then spray high-speed oxygen flow to make the metal at the preheated part Burns and releases heat for cutting and welding. [0004] However, the existing natural gas cannot reach the idea...

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Problems solved by technology

[0004] However, the existing natural gas cannot reach the ideal temperature for cutting and welding, which results in a waste of a lot of time and needs to be used with combustion-supporting additives. There are many types of existing combustion-supporting additives, and their performance is unstable. Welding, especially for ferrous steel with a higher melting point, still has problems, and there is still a gap in welding quality compared with dissolved acetylene