Method for preparing ferro-aluminum alloy porous material

Abstract

The invention relates to a method for preparing a ferro-aluminum alloy porous material, which is directly used for producing the porous material or a filtering element based on a ferro-aluminum inter-metallic compound. The method comprises the following steps: adopting powder containing ferro-aluminum components, and mixing the powder according to the designed weight component ratio; preparing themixture into flaky or formed blanks by adopting die forming, and controlling the pressure between 50 and 300 MPa, or preparing the mixture into tubular parisons by adopting isostatic cool pressing, and controlling the isostatic pressure between 50 and 200 MPa; and adopting a pressureless sintering process at a temperature of between 950 and 1,250 DEG C in a sintering atmosphere of hydrogen gas orcracked ammonia, or adopting vacuum sintering, wherein the key improvements are that the powder containing the ferro-aluminum components comprises Fe powder with the particle size of between 300 and1 mum and FexAly powder with the particle size of between 300 and 1 mum, and the Fe accounts for 76.6 to 3.5 percent and the FexAly accounts for 23.4 to 96.2 percent in percentage by weight.

Description

technical field [0001] The method relates to a method for preparing iron-aluminum alloy porous materials by means of powder metallurgy technology. It is an improvement on the prior art. technical background [0002] The method of preparing iron-aluminum alloy porous materials is a topic of much concern at present. Especially with the current high-speed development of modern industry, energy waste and environmental pollution are becoming more and more serious. A large amount of dusty high-temperature gas, coal gas, gas, and flue gas, has become a threat to human survival. High-pollution industries, such as iron and steel, thermal power, and various furnaces, form the main source of pollution. The traditional process and equipment used in the purification, filtration and dust removal process or system of pollution control, due to the limitation of material characteristics, can no longer meet the situation requirements of energy saving and consumption reduction. The solutio...

AI Technical Summary

Problems solved by technology

In the late 1990s, in view of the problems of poor thermal shock resistance and low reliability of ceramic filter materials, some western countries carried out research and development of porous filter materials with metallic properties.

Even so, the stability of product quality cannot be completely solved

Increased production costs, forming the biggest price barrier in popularization and application

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