CN101709447A - Process for producing continuous hot dip aluminum-silicon plated steel plate - Google Patents
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Abstract
The invention relates to a process for producing a continuous hot dip aluminum plated steel plate, which is used for industries, such as cars, kitchen ware, construction, solar energy power generation, and the like and belongs to the technical field of composite materials of a steel band plate plating layer. After a cold-rolling steel plate is carried out chemical degreasing and electrolytic degreasing, an aluminum-silicon solution is hot plated on the front and the back of the cold-rolling steel plate; and after air knife flattening, air cooling, optical trimming, drawing and straightening are carried out, the cold-rolling steel plate is passivated and dried to form a finished product. The invention has less environmental pollution, simple technical process and equipment, low cost, short process cycle and wide product purpose; and the product performances of the heat resistance, the corrosion resistance and the abrasion resistance are better than that of a zinc plating plate and an aluminum-zinc plating plate.
Description
Technical field
The present invention relates to a kind of production technique of continuous hot dip aluminum alloy steel plate, be used for industries such as automobile, kitchen tools, building, solar electrical energy generation, belong to steel band plate coating technical field of composite materials.
Background technology
Steel surface aluminum plating method has a variety of, is generally: 1. solid alitizing method; 2. hot dip process method; 3. gas phase calorizing; 4. thermospraying calorizing; 5. slip calorizing; 6. vacuum evaporation Diffusional aluminizing method etc.Solid alitizing method, gas phase calorizing, thermospraying calorizing, slip calorizing only are applicable to that all single products aluminizes; And vacuum evaporation Diffusional aluminizing method equipment complexity, the cost of investment height.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, thereby a kind of production technique of polluting the continuous hot dip aluminum-silicon plated steel plate little, that cost is low is provided.
According to technical scheme provided by the invention, a kind of production technique of continuous hot dip aluminum-silicon plated steel plate is characterized in that: adopt following processing step: it is formed proportioning and calculates by weight:
(1), the configuration of aluminum silicon alloy solution:
Get aluminium ingot: 85～90 parts, silicon ingot: 5～10 parts are placed in the induction heater and melt Heating temperature: 680～700 ℃, and fusing time 12～18 days, the aluminum silicon alloy solution temperature is: 550～650 ℃, stand-by;
(2), the production of continuous hot dip aluminum-silicon plated steel plate:
(a), substrate is cold-rolled steel sheet, the width of cold-rolled steel sheet is 1000～1250mm; Thickness is 0.5～2.0mm; Cold-rolled steel sheet is placed on carries out chemical degreasing in the solution tank and handle, put into water and solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 1～2%, and solution temperature is: 70～90 ℃, degreasing time is: 120-150 rice/minute;
(b), the above-mentioned cold-rolled steel sheet of handling through chemical degreasing is placed on carries out electrolytic degreasing in the solution tank, put into water and solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 2～3%, solution temperature is: 70～90 ℃, degreasing time is: 120～150 meters/minute;
(c), above-mentioned cold-rolled steel sheet after chemical degreasing and electrolytic degreasing are handled is being heat-treated in the carbon stove continuously: carry out thermal pretreatment earlier, preheating temperature is: 450～550 ℃, be warm up time: 30～120 meters/minute; Carry out fast thermal treatment again, fast thermal treatment temp is 680～780 ℃, and the fast hot time is: 30～120 meters/minute;
(d), with above-mentioned heat treated cold-rolled steel sheet stand-by aluminum silicon alloy solution in the even immersion plating of tow sides on the hot-dip coating unit, machine speed is: 120～150 meters/minute;
(e), carry out the dip calorizing silicon plated steel plate is controlled the aluminum silicon alloy layer under air knife thickness, air knife pressure is 0.008～0.01MPa with above-mentioned, aluminum silicon alloy layer thickness 40～200 grams/square metre;
(f), with above-mentioned aluminum silicon alloy steel plate through the blower fan deepfreeze: cooling temperature is: 95～100 ℃, machine speed: 120～150 meters/minute;
(g), above-mentioned aluminum silicon alloy steel plate through air-cooled processing is carried out polishing under the polishing machine: polishing machine pressure is: 100～200 tons, machine speed are: 120～150 meters/minute;
(h), above-mentioned aluminum silicon alloy steel plate through polishing carried out straightening handle under the straightening machine, tension force is that 10～15 tons, machine speed are 120～150 meters/minute;
(j), will go up art and under passivation plating machine, carry out Passivation Treatment through the aluminum silicon alloy steel plate of straightening; Passivating solution is to add chromic acid in the water, and the concentration expressed in percentage by weight of chromic acid is: 30～40%, and passivation time is: 120～150 meters/minute;
(k), above-mentioned aluminum silicon alloy steel plate through Passivation Treatment is dried processing: temperature is: 80～100 ℃, drying time is: 120～150 meters/minute.
The present invention compared with prior art has the following advantages:
(1) environmental pollution is little;
(2) technological process and equipment are simple, and cost is low, and process cycle is short;
(3) end-use is wide, and product performance are more zinc-plated, aluminium plating zinc plate is superior: thermotolerance is better than galvanized sheet, aluminium plating zinc plate; Erosion resistance is better than galvanized sheet, aluminium plating zinc plate; Wear resistance is better than galvanized sheet, aluminium plating zinc plate.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
The starting material of Cai Yonging are market and purchase in embodiments of the present invention, and the equipment of employing is the routine unit of aluminizing, and comprise induction heater, solution tank, carbon stove, hot-dip coating unit, blower fan, polishing machine and oven dry cabinet etc. are linked to be unit continuously.
Embodiment one: the production technique of a kind of continuous hot dip aluminum-silicon plated steel plate of the present invention, and adopt following processing step: it is formed proportioning and calculates by weight:
Get 85 parts of aluminium ingots, silicon ingot is placed on for 10 parts and carries out heat fused in the induction heater, Heating temperature: 680 ℃, fusing time 18 days, the aluminum silicon alloy solution temperature is: 550 ℃, stand-by; Substrate is selected cold-rolled steel sheet for use, and the cold-rolled steel sheet width is 1000mm, and thickness is 2mm.
1, getting cold-rolled steel sheet is placed on and carries out chemical degreasing in the solution tank and handle, put into the scale solution that the solid caustic soda of 100 kilograms water and 1 kilogram is made in the solution tank, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 1%, and the scale solution temperature is: 70 ℃, degreasing time is: 120 meters/minute;
2, the above-mentioned cold-rolled steel sheet of handling through chemical degreasing is placed on carries out electrolytic degreasing in the solution tank, put into 100 kilograms water and 2 kilograms solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 2%, the scale solution temperature is: 70 ℃, degreasing time is: 120 meters/minute;
3, above-mentioned cold-rolled steel sheet after chemical degreasing and electrolytic degreasing are handled is being heat-treated in the carbon stove continuously: carry out thermal pretreatment earlier, preheating temperature is: 450 ℃, be warm up time: 30 meters/minute; Carry out fast thermal treatment again, fast thermal treatment temp is 680 ℃, and the fast hot time is: 30 meters/minute;
4, with above-mentioned heat treated cold-rolled steel sheet stand-by aluminum silicon alloy solution in the even immersion plating of tow sides on the hot-dip coating unit, the treatment time is: 120 meters/minute;
5, carry out the dip calorizing silicon plated steel plate is controlled the aluminum silicon alloy layer under air knife thickness with above-mentioned, air knife pressure is 0.008MPa, alloy layer thickness 200 grams/square metre;
6, above-mentioned aluminum silicon alloy steel plate is carried out air-cooled processing through blower fan: cooling temperature is: 95 ℃, cooling time are: 150 meters/minute;
7, above-mentioned aluminum silicon alloy steel plate through air-cooled processing is carried out polishing on the polishing unit: polishing machine pressure is: 100 tons, machine speed are: 120 meters/minute;
8, above-mentioned aluminum silicon alloy steel plate through polishing is carried out straightening under the straightening machine and handle, tension force is that 10 tons, machine speed are 120 meters/minute;
9, will go up art and carry out Passivation Treatment through the aluminum silicon alloy steel plate of straightening in deactivation slot, the passivating solution in the deactivation slot adopts and add 30 kilograms of chromic acid in 100 kg of water, and the concentration expressed in percentage by weight that makes chromic acid in the passivating solution is 30%, and passivation time is: 120 meters/minute;
10, above-mentioned aluminum silicon alloy steel plate through Passivation Treatment is dried processing: temperature is: 80 ℃, drying time is: 120 meters/minute.
Embodiment two: the production technique of a kind of continuous hot dip aluminum-silicon plated steel plate of the present invention, and adopt following processing step: it is formed proportioning and calculates by weight:
Get 90 parts of aluminium ingots, silicon ingot is placed on for 5 parts and carries out heat fused in the induction heater, Heating temperature: 700 ℃, fusing time 12 days, the aluminum silicon alloy solution temperature is: 650 ℃, stand-by; Substrate is selected cold-rolled steel sheet for use, and the cold-rolled steel sheet width is 1250mm, and thickness is 0.5mm.
1, getting cold-rolled steel sheet is placed on and carries out chemical degreasing in the solution tank and handle, put into the scale solution that the solid caustic soda of 100 kilograms water and 2 kilograms is made in the solution tank, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 2%, and the scale solution temperature is: 90 ℃, degreasing time is: 150 meters/minute;
2, the above-mentioned cold-rolled steel sheet of handling through chemical degreasing is placed on carries out electrolytic degreasing in the solution tank, put into 100 kilograms water and 3 kilograms solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 3%, the scale solution temperature is: 90 ℃, degreasing time is: 150 meters/minute;
3, above-mentioned cold-rolled steel sheet after chemical degreasing and electrolytic degreasing are handled is being heat-treated in the carbon stove continuously: carry out thermal pretreatment earlier, preheating temperature is: 550 ℃, be warm up time: 120 meters/minute; Carry out fast thermal treatment again, fast thermal treatment temp is 780 ℃, and the fast hot time is: 120 meters/minute;
4, with above-mentioned heat treated cold-rolled steel sheet stand-by aluminum silicon alloy solution in the even immersion plating of tow sides on the hot-dip coating unit, the treatment time is: 150 meters/minute;
5, carry out the dip calorizing silicon plated steel plate is controlled the aluminum silicon alloy layer under air knife thickness with above-mentioned, air knife pressure is 0.01MPa, alloy layer thickness 40 grams/square metre;
6, above-mentioned aluminum silicon alloy steel plate is carried out air-cooled processing through blower fan: cooling temperature is: 100 ℃, cooling time are: 120 meters/minute;
7, above-mentioned aluminum silicon alloy steel plate through air-cooled processing is carried out polishing on the polishing unit: polishing machine pressure is: 200 tons, machine speed are: 150 meters/minute;
8, above-mentioned aluminum silicon alloy steel plate through polishing is carried out straightening under the straightening machine and handle, tension force is that 15 tons, machine speed are 150 meters/minute;
9, will go up art and carry out Passivation Treatment through the aluminum silicon alloy steel plate of straightening in deactivation slot, the passivating solution in the deactivation slot adopts and add 40 kilograms of chromic acid in 100 kg of water, and the concentration expressed in percentage by weight that makes chromic acid in the passivating solution is 40%, and passivation time is: 150 meters/minute;
10, above-mentioned aluminum silicon alloy steel plate through Passivation Treatment is dried processing: temperature is: 100 ℃, drying time is: 150 meters/minute.
Embodiment three: the production technique of a kind of continuous hot dip aluminum-silicon plated steel plate of the present invention, and adopt following processing step: it is formed proportioning and calculates by weight:
Get 88 parts of aluminium ingots, silicon ingot is placed on for 8 parts and carries out heat fused in the induction heater, Heating temperature: 690 ℃, fusing time 15 days, the aluminum silicon alloy solution temperature is: 600 ℃, stand-by; Substrate is selected cold-rolled steel sheet for use, and the cold-rolled steel sheet width is 1150mm, and thickness is 1mm.
1, getting cold-rolled steel sheet is placed on and carries out chemical degreasing in the solution tank and handle, put into the scale solution that the solid caustic soda of 100 kilograms water and 1.5 kilograms is made in the solution tank, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 1.5%, and the scale solution temperature is: 80 ℃, degreasing time is: 135 meters/minute;
2, the above-mentioned cold-rolled steel sheet of handling through chemical degreasing is placed on carries out electrolytic degreasing in the solution tank, put into 100 kilograms water and 2.5 kilograms solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 2.5%, the scale solution temperature is: 80 ℃, degreasing time is: 135 meters/minute;
3, above-mentioned cold-rolled steel sheet after chemical degreasing and electrolytic degreasing are handled is being heat-treated in the carbon stove continuously: carry out thermal pretreatment earlier, preheating temperature is: 500 ℃, be warm up time: 90 meters/minute; Carry out fast thermal treatment again, fast thermal treatment temp is 740 ℃, and the fast hot time is: 80 meters/minute;
4, with above-mentioned heat treated cold-rolled steel sheet stand-by aluminum silicon alloy solution in the even immersion plating of tow sides on the hot-dip coating unit, the treatment time is: 135 meters/minute;
5, carry out the dip calorizing silicon plated steel plate is controlled the aluminum silicon alloy layer under air knife thickness with above-mentioned, air knife pressure is 0.009MPa, alloy layer thickness 100 grams/square metre;
6, above-mentioned aluminum silicon alloy steel plate is carried out air-cooled processing through blower fan: cooling temperature is: 98 ℃, cooling time are: 135 meters/minute;
7, above-mentioned aluminum silicon alloy steel plate through air-cooled processing is carried out polishing on the polishing unit: polishing machine pressure is: 150 tons, machine speed are: 135 meters/minute;
8, above-mentioned aluminum silicon alloy steel plate through polishing is carried out straightening under the straightening machine and handle, tension force is that 13 tons, machine speed are 135 meters/minute;
9, will go up art and carry out Passivation Treatment through the aluminum silicon alloy steel plate of straightening in deactivation slot, the passivating solution in the deactivation slot adopts and add 35 kilograms of chromic acid in 100 kg of water, and the concentration expressed in percentage by weight that makes chromic acid in the passivating solution is 35%, and passivation time is: 135 meters/minute;
10, above-mentioned aluminum silicon alloy steel plate through Passivation Treatment is dried processing: temperature is: 100 ℃, drying time is: 150 meters/minute.
The hot dip aluminum-silicon plated steel plate of producing through method of the present invention carries out quality examination, obtains detection index as shown in Table 1 and Table 2:
Table 1 aludip mechanical property
Claims (1)
1. the production technique of a continuous hot dip aluminum-silicon plated steel plate is characterized in that: adopt following processing step: it is formed proportioning and calculates by weight:
(1), the configuration of aluminum silicon alloy solution:
Get aluminium ingot: 85～90 parts, silicon ingot: 5～10 parts are placed in the induction heater and melt Heating temperature: 680～700 ℃, and fusing time 12～18 days, the aluminum silicon alloy solution temperature is: 550～650 ℃, stand-by;
(2), the production of continuous hot dip aluminum-silicon plated steel plate:
(a), substrate is cold-rolled steel sheet, the width of cold-rolled steel sheet is 1000～1250mm; Thickness is 0.5～2.0mm; Cold-rolled steel sheet is placed on carries out chemical degreasing in the solution tank and handle, put into water and solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 1～2%, and solution temperature is: 70～90 ℃, degreasing time is: 120-150 rice/minute;
(b), the above-mentioned cold-rolled steel sheet of handling through chemical degreasing is placed on carries out electrolytic degreasing in the solution tank, put into water and solid caustic soda in the solution tank and make scale solution, the concentration expressed in percentage by weight of solid caustic soda is in the scale solution: 2～3%, solution temperature is: 70～90 ℃, degreasing time is: 120～150 meters/minute;
(c), above-mentioned cold-rolled steel sheet after chemical degreasing and electrolytic degreasing are handled is being heat-treated in the carbon stove continuously: carry out thermal pretreatment earlier, preheating temperature is: 450～550 ℃, be warm up time: 30～120 meters/minute; Carry out fast thermal treatment again, fast thermal treatment temp is 680～780 ℃, and the fast hot time is: 30～120 meters/minute;
(d), with the above-mentioned heat treated cold-rolled steel sheet even dip calorizing silicon alloy of tow sides solution on the hot-dip coating unit, machine speed is: 120～150 meters/minute; The aluminum silicon alloy steel plate of immersion plating is controlled the thickness of aluminum silicon alloy layer under air knife, air knife pressure is: 0.008～0.01MPa, and the aluminum silicon alloy layer thickness is: 40～200 grams/square metre;
(e), with the aluminum silicon alloy steel plate after the above-mentioned immersion plating through the blower fan deepfreeze: cooling temperature is: 95～100 ℃, machine speed: 120～150 meters/minute;
(f), above-mentioned aluminum silicon alloy steel plate through air-cooled processing is carried out polishing under the polishing machine: polishing machine pressure is: 100～200 tons, machine speed are: 120～150 meters/minute;
(g), above-mentioned aluminum silicon alloy steel plate through polishing carried out straightening handle under the straightening machine, tension force is 10～15 tons, machine speed is 120～150 meters/minute;
(h), the above-mentioned aluminum silicon alloy steel plate of handling through straightening is carried out Passivation Treatment under passivation plating machine; Passivating solution is to add chromic acid in the water, and the concentration expressed in percentage by weight of chromic acid is: 30～40%, and passivation time is: 120～150 meters/minute;
(j), above-mentioned aluminum silicon alloy steel plate through Passivation Treatment is dried be treated to finished product; Bake out temperature is: 80～100 ℃, drying time is: 120～150 meters/minute.
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Open date: 20100519 |