Fire resistant iron chromium aluminum filament and production technique

Abstract

The invention relates to a high temperature resistant iron-chromium-aluminum fiber yarn and a preparing process, belongs to the field of stainless steel processing and obtains the iron-chromium-aluminum fibers by bundle drawing iron-chromium-aluminum wire rods embedded in base materials; the iron-chromium-aluminum fibers comprise iron and the following components (represented by wt. percent) of more than or equal to 0.005 percent and less than or equal to 0.03 percent of C, more than or equal to 15 percent and less than or equal to 27 percent of Cr, more than or equal to 5.95 percent and less than or equal to 7.0 percent of Al, more than or equal to 0.05 percent and less than or equal to 0.2 percent of Cu, more than or equal to 0.4 percent and less than or equal to 0.6 percent of Si, more than or equal to 0.2 percent and less than or equal to 0.4 percent of Mn, more than or equal to 0.03 percent and less than or equal to 0.04 percent of S, more than or equal to 0.010 percent and less than or equal to 0.045 percent of P and more than or equal to 0.01 percent and less than or equal to 0.04 percent of RE; the manufacturing process comprises the following procedures of material choosing, pretreatment, encapsulation, compaction, drawing, separation and rolling. The manufacturing process of the iron-chromium-aluminum fiber of the invention is suitable for drawing and processing high-aluminum iron-chromium-aluminum wire rods and can reach the yield of 98 percent with little influence on the environment.

Description

Technical field: [0001] The invention relates to a high-temperature-resistant iron-chromium-aluminum fiber wire. The invention also relates to a preparation method for obtaining high-temperature-resistant iron-chromium-aluminum fiber filaments by clustering and drawing the iron-chromium-aluminum wires. Background technique: [0002] At present, three types of alloys such as Ni-Cr, Fe-Cr-Al and Fe-Mo-W are metal carrier materials that can be used as automobile exhaust purifiers. From the comprehensive consideration of processing performance and economic value, Fe-Cr-Al is the most promising alloy. With the rapid increase of the number of automobiles in my country, the pollution caused by motor vehicle exhaust emissions is becoming more and more serious, and the demand for Fe-Cr-Al fibers that can be used for automobile exhaust purification is also increasing year by year. At the same time, from the perspective of energy saving and environmental protection, higher requiremen...

AI Technical Summary

Problems solved by technology

Although the metal fiber yarn manufacturing process of this invention is suitable for drawing processing, its yield is low, and the service life of the obtained Fe-Cr-Al fiber is not ideal.

At the same time, the metal fiber yarn manufacturing process of this invention has too many annealing passes and is difficult to operate. A large amount of harmful gases are generated during pickling, and the production cost is high, so it is difficult to realize large-scale production.

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