Vertical continuous annealing furnace bluing device and bluing technology thereof

A continuous annealing furnace, vertical technology, applied in the direction of metal material coating process, furnace, furnace type, etc., can solve the problems of long production operation time, low production efficiency, complex process, etc., to increase energy consumption and high production efficiency , the effect of simple process

Inactive Publication Date: 2013-06-12
XINYU IRON & STEEL CO LTD
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Problems solved by technology

Patent literature publication number CN 101082075A "uncoated electrical steel annealing and bluing process and device" and publication number CN 101871041A "a cold-rolled silicon steel sheet punching workpiece continuous annealing bluing process" to the development of special annealing-blueing equipment The blueing process was introduced. The disadvantages of these processes are: 1) The deep processing of the steel strip--the second heating annealing + blueing treatment of the punched sheet, consumes a lot of energy; 2) The process is complicated, the production time is long, and the production low efficiency

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  • Vertical continuous annealing furnace bluing device and bluing technology thereof

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[0016] Example: see figure 1 , pickling-rolled chilled steel strip 1, in the vertical continuous annealing unit, after winding-leveling-cutting head and tail-welding-surface cleaning, drying-vertical looper, enter the vertical continuous annealing unit Annealing in the furnace. At this time, each section of the furnace is filled with 3.0% to 5.0% hydrogen and a protective gas with the balance being nitrogen. The residual oxygen content is controlled below 0.02% to prevent surface oxidation. The atmosphere in the furnace is controlled through the relief valve 2 installed on the top of each section of the furnace, the furnace gas analyzer 3 connected to the pipeline, and the regulating valve 4 on the protective gas pipeline to realize automatic detection and adjustment, maintain a slight positive pressure, and the detection data is displayed in the operating room real-time display on the screen. Steel strip 1 enters the furnace for preheating—heating—soaking (soaking temperatur...

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Abstract

The invention relates to a heat treatment device and heat treatment technology thereof and discloses a vertical continuous annealing furnace bluing device and bluing technology thereof. A bluing medium station is arranged and is communicated with a rapid cooling section, an overaging section and a final cooling section of a hearth through medium pipelines to control opening degree of a control adjusting valve and a relief valve. Oxygen content in the rapid cooling section and/or the overaging section and/or the final cooling section of the hearth is adjusted to be in a range of 0.03%-1.00%. An existing vertical continuous annealing furnace is used and a bluing device is added so that two processes of annealing and bluing of a bluing steel belt are finished by once in the vertical continuous annealing furnace, and therefore device investment and following heat treatment energy consumption are saved; continuous mass production is achieved, production cost is low, performance of a product is stable, surface bluing effect is good and production efficiency is high.

Description

technical field [0001] The invention relates to a heat treatment device and a heat treatment process thereof, in particular to a continuous annealing furnace bluing device and a bluing process thereof, in particular to a vertical continuous annealing furnace bluing device and a bluing process thereof. Background technique [0002] In the cold-rolled strip pickling-rolling-continuous annealing equipment, because the vertical continuous annealing furnace makes full use of the space, it has the advantages of small footprint, compact layout, large heat treatment capacity, convenient production management and high production efficiency . Because of the property of preventing oxidation of the steel strip during the annealing process, only nitrogen (N 2 ), hydrogen (H 2 ) Protective gas pipes to feed protective gas into the furnace. In cold-rolled steel strip products, the surface of some steel strips (punches) will be further blued for the purpose of anti-rust and insulation, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C21D9/56C21D1/26C23C8/10
Inventor 陈爱平王振基郭卫强卢平安周建明陈军周杨易新平杨伟杰王国文杨帆
Owner XINYU IRON & STEEL CO LTD
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