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   Author  Topic: Bright annealing of stainless steel strip  (Read 147 times)
qizhen0926
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Bright annealing of stainless steel strip
« on: May 29th, 2018, 10:23pm »		 Quote Quote Modify Modify Remove Remove
The stainless steel bright annealing line (BAL) of a steel plant is a large production line designed and manufactured by foreign companies for bright annealing of stainless steel belt. The total height is 55m, which can handle stainless steel strip with a width of 600 to 1250mm and 0.1 to 3.0mm in thickness.Hoja de acero inoxidable AISI ASTM SUS309s
The size of the muffle tube in the furnace is large (<1820mm x 28500mm), and the mass (20000kg) is large. The normal use temperature of the muffle tube is above 1000 centigrade, and the maximum working temperature can reach 1200. Because of the high temperature nickel base heat resistant alloy, the material has excellent mechanical properties, especially high temperature lasting strength and oxidation resistance, which can not be produced at home, and it is entirely dependent on import. The long time effect of high temperature self weight condition causes many defects in the operation process of stainless steel bright annealing line and affects production. In actual production, in order to ensure the reliable operation of BAL and shorten the time of changing muffle, two muffle (respectively A1 and A2) are prepared, and two muffle (one for one use) can not be used normally during the actual operation, and it takes about 1 years and is expensive to make a new Ma muffle. Therefore, analyzing the causes of various defects and repairing muffle will help to ensure normal production and has important engineering application value.
The defects of the muffle tube, such as the long time high temperature, the self weight (20000kg) and the inhomogeneous temperature caused by the unevenly burning of the burner, will appear in the process of using the necking, the thinning of the wall thickness, the crack of the weld, the deformation of the cross section, the banana shaped bending and the drum package.Tubo sintético pulido del acero inoxidable 304
The defects such as elongation, necking, thickness reduction, cross section deformation, bending, drum and other defects caused by high temperature creep can be repaired by the measures of removing the failure parts. To this end, the muffle tube is comprehensively measured before repair to determine the repair process and the acceptance criteria after repair. Secondly, the defect parts are excised and welded.630 con rayas de acero inoxidable nº 4
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