Aluminium based powder core wire

Abstract

An aluminum-based dusty core wire, belonging to the hot spraying field of surface project, mainly applies in the working environment of high temperature and corrosiveness. The provided aluminum-based dusty core wire is characterized in that aluminum strip is used as the shell of dusty core wire, and Fe, Ni and Ti metal powder are added into dusty core, the weight ratio being: 40-60% Al, the rest being one of Fe, Ni and Ti metal powder or the random combination of them. Said aluminum-based dusty core wire is adding 0-5% B and 0-3% rare-earth (RE) by weight into dusty core. Experimental study of oxidation and corrosion expresses that the oxidation resistance and resistance to corrosion of aluminum-based coating prepared with aluminum-based dusty core wire are appreciable more excellent than those of the ferrum-based coating prepared with ferrum-based dusty core wire, and equal to the 45CT coating generally recognized that the oxidation resistance and resistance to corrosion are excellent. It provides an effective measure to solving the problem of corrosion and protection in the industry of petrochemistry, energy source, mechanics, and aerospace.

Description

technical field [0001] It belongs to the field of surface engineering thermal spraying, and the invention is mainly used in high temperature and corrosive working environments. Background technique [0002] Damage due to corrosion is one of the most important damaging factors in modern industry. The World Corrosion Survey Report shows that the national economy has paid a huge price for corrosion, and its value can account for 1%-5% of the GNP of each country. The global economic loss caused by corrosion is about 700 billion U.S. dollars every year. According to the survey report, the direct economic loss of corrosion in the United States, Britain and other countries accounted for 4.2% and 3.5% of GNP respectively. In 1995, my country's corrosion economic loss was as high as 150 billion yuan, accounting for about 4% of the gross national product in that year. In 1998, the loss caused by corrosion in the chemical industry alone reached 40 billion yuan. [0003] With the deve...

AI Technical Summary

Problems solved by technology

However, due to the high cost of plasma spraying and high-velocity flame spraying, low production efficiency, and difficulty in on-site construction, a wide range of industrial applications is limited

Some domestic research institutions use the method of arc spraying iron-based powder core wire (made of aluminum powder wrapped in steel strip) to prepare Fe-Al coating, but because the iron-based wire is used, the density of aluminum powder is small, and its addition is limited. (the highest aluminum content in the formula is only about 20%), less intermetallic compounds are generated, and the coating performance is not very ideal

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