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一、概述钢铁的裁剪,历来主要是由“氧乙炔”火焰切割完成。其切割原理是,利用乙炔燃烧热,把金属加热到燃烧温度(低碳钢为1250℃),再利用高速氧流的激烈氧化和吹除熔渣的作用,使金属割开。气割中的乙炔仅起燃料的作用。由于石油化工工业的迅速发展,为气体切割作业提供了丰富的廉价燃料——液化石油气。近几年来,一些发达国家,广泛地采用了液化石油气切割。
First, an overview of the cutting of steel, has always been mainly by the “oxyacetylene” flame cutting completed. The cutting principle is to use acetylene combustion heat, the metal is heated to the combustion temperature (low carbon steel 1250 ℃), and then use the high-speed oxygen flow of intense oxidation and blowing off the role of slag, the metal cut open. Acetylene gas cutting only from the role of fuel. Due to the rapid development of the petrochemical industry, LPG, a rich and inexpensive fuel for gas cutting operations, has been provided. In recent years, some developed countries have adopted LPG cutting widely.