CN108330425A - A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method - Google Patents

Abstract

A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method, is prepared as spray coating powder by Fe-based self-fluxing alloy, cold roll workpiece surface is sprayed on by the way of Ultrasonic Arc Sprayed, mass percent is：5~11% Cr, 3.0~5.0% B, 2.0~5.5% Si, 2~5% C, 1~3% W, 0.3~1% Mo, 0.1~1% Nb, 0.1~3% Y, 1~5% NaBH₄And K₂WO₄And NaF, 0.5~2% nano silicon dioxide, 1~6% nano-titanium dioxide, surplus Fe；Powder is mixed 120 minutes with fluid bed, then rotates into capable mixing with sizes of balls with rotating speed per minute 200~260.The coating of the present invention is full amorphous state, and coating is fine and close, and with substrate combinating strength height, hardness is high, and corrosion resisting property is high, and the thermostability of coating is good, has excellent wear-resisting and anti-corrosion comprehensive performance.

Description

A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method

Technical field

The invention belongs to sheet of material cold rolling technology field, can make cold roll roll surface of thin steel sheet is more smooth, density more Close, bending strength improves five point one than electrodeposited chromium.

Background technology

Cold-strip steel steel plate largely uses in the industries such as automobile, household electrical appliances, and per about 100,000,000 tons of annual consumption, the output value reaches hundreds billion of To many trillion member.The surface of steel plate appears to be flat, and actually this is not so.Good cold-strip steel surface of steel plate has a large amount of pit And boss, such roll bending annealing heat-treats whens, ensure that there are gaps between plate face（Gas passage）, prevent plate face adhesion, cunning Set is conveniently stablized in follow-up stove and is stacked, also processed because of the subsequent mechanical that convex-concave surface is easy oil storage and is conducive to steel plate.

There is the steel plate of certain appearance structure and roughness in order to prepare surface, the solution of industry is exactly that texturing is rolled Roller.Texturing technology is the domestic abbreviation for handling belt steel surface roller surface structuring (Surface Texturing).It obtains high Service life, low roller are consumed, high pattern transmits stability and the high-performance roll of different-shape distribution characteristics is steel cold rolling industry Crucial requirement.

Electrodeposited chromium cold roll waste water treatment process is complicated, and intractability is larger, and cost is higher, and micromidi electric plating corporation can not Bear high pollutant control cost.Contain oils, surface-active in the waste water and waste residue that are discharged in the production process of plating Agent, organic solvent, heavy metal ion and its hydroxide contain soda acid exhaust gas, nitrogen oxides, mist of chromic acid, useless containing cyanogen in exhaust gas Gas etc. pollutes the substance of environment.The dangerous solid waste of generation includes pretreatment cleaning slot, electroplating bath and post-processing groove body High-concentration waste liquid, containing copper, nickel, chromium, zinc, cadmium, lead etc., the electroplating industry industry indispensable as national economy, technique Complexity, generation pollutant are numerous, and difficulty of governance is big.Breathing enters, and has stimulation and corrosiveness to respiratory tract, causes pharyngitis, branch Tracheitis etc..The serious Area Inhabitants of water pollution, often in contact with or Excess free enthalpy person, the rhinitis that is easy to get, tuberculosis, diarrhea, bronchus Inflammation, dermatitis etc..

Invention content

Present invention aim to solve problem above, a kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous is provided Coating process replaces electrodeposited chromium, make self-fluxing alloy corrosion resistance and wearability while improving, by the Fe-based self-fluxing alloy of low cost Amorphous Fe-based self-fluxing alloy coating, coating tool are prepared using the method for Ultrasonic Arc Sprayed as spraying chalk line There is excellent wear-resisting and anti-corrosion comprehensive performance.

To achieve the above object, the present invention adopts the following technical scheme that：A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy Amorphous coating method, its main feature is that：Its step are as follows：

1）Cold roll workpiece surface deoils, sandblasting, surface de-oxidation layer, surface texturing；

2）Fe-based self-fluxing alloy is prepared as spray coating powder, cold roll workpiece is sprayed on by the way of Ultrasonic Arc Sprayed Surface, spraying thickness is 50~100um, and in spraying process, temperature is 5000~7000 degree, the air pressure of spraying for 0.6~ 1mpa；Form the Fe-based self-fluxing alloy amorphous coating；It is the sum of by weight percent 100% meter, the Fe-based self-fluxing alloy In element composition and the mass percent of each element be：5~11% Cr, 3.0~5.0% B, 2.0~5.5% Si, 2~ 5% C, 1~3% W, 0.3~1% Mo（Molybdenum）, 0.1~1% Nb（Niobium）, 0.1~3% Y（Yttrium）, 1~5% NaBH₄With K₂WO₄And NaF, 0.5~2% nano silicon dioxide, 1~6% nano-titanium dioxide, surplus Fe；Powder is mixed with fluid bed 120 minutes, then capable mixing is rotated into rotating speed per minute 200~260 with sizes of balls, it is inverted again 12 hours after first rotating forward 12 hours, It per minute 60~120 rotates into row slow-speed 24 hours again, is then placed in subzero 196 degree and carries out deep cooling 36 hours, then at 200 degree above freezing Destressing in 24 hours is carried out to dry；

3）Hardness is HV900~1200 after spray fusing, and Ultrasonic Arc Sprayed bond strength is 68mpa, with being combined after laser spray fusing Intensity is 400Mpa.

Advantageous effect

The present invention is prepared into nickel-based self-fluxing alloy using conventional alloying element, can effectively lower production cost, while Cr is added The corrosion resistance of coating can be improved, the amorphous formation ability that coating can be improved in B and Si is added, nano silicon dioxide is reacted with carbon Silicon carbide is formed, titanium carbide, chromium carbide reaction improve abrasion-proof corrosion-proof performance, and institutional framework is closeer after cladding, bond strength 400Mpa, not Texturing Surface of Roll roll general steel sheet, laser roughening cold roll can roll high-grade sheet metal.The coating of the present invention is complete Amorphous state, coating is fine and close, and with substrate combinating strength height, hardness is high, and corrosion resisting property is high, and the thermostability of coating is good, has excellent Wear-resisting and anti-corrosion comprehensive performance.

Specific implementation mode

The cold roll matrix of the present invention is 9cr2mov, is heat-treated destressing, hardness hs95~99, matrix surface spray substantially Cladding after painting applies 50~100um of thickness, and 30~50um of thickness is applied after rubbing down, and surface is firmly hv850~1200, and roller diameter 80~ 1200mm, long 150~12000mm.

Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method：1）Cold rolling roller surface is deoiled, sandblasting cold roll table Face, 80% or more relative humidity, surface de-oxidation layer, surface texturing, cold roll surface sand-blasting roughness are 0.4um~100um, The particle size range of Ultrasonic Arc Sprayed line inner powder is 4~100 μm, 40~100nm of powder after Supersonic Velocity Electric Arc Spraying, after spray fusing Granularity is 20~60nm.

2）Fe-based self-fluxing alloy is prepared as spray coating powder, cold roll is sprayed on by the way of Ultrasonic Arc Sprayed Workpiece surface, spraying thickness are 50~100um, and in spraying process, temperature is 5000~7000 degree, and the air pressure of spraying is 0.6~1mpa；Form the Fe-based self-fluxing alloy amorphous coating；Be the sum of by weight percent 100% meter, the iron-based from Element in fusion gold forms and the mass percent of each element is：5~11% Cr, 3.0~5.0% B, 2.0~5.5% Si, 2~5% C, 1~3% W, 0.3~1% Mo Mo（Molybdenum）, 0.1~1% Nb（Niobium）, 0.1~3% Y（Yttrium）, 1~5% NaBH₄And K₂WO₄And NaF, 0.5~2% nano silicon dioxide, 1~6% nano-titanium dioxide, surplus Fe；Powder is used Fluid bed mixes 120 minutes, then rotates into capable mixing with sizes of balls with rotating speed per minute 200~260, anti-again after first rotating forward 12 hours Turn 12 hours, then per minute 60~120 rotate into row slow-speed 24 hours, is then placed in subzero 196 degree and carries out deep cooling 36 hours, then 200 degree above freezing carry out destressing in 24 hours and dry.

3）Hardness HV900~1200 after spray fusing, Ultrasonic Arc Sprayed bond strength are 68mpa, strong with being combined after laser spray fusing Degree is 400Mpa.

Supersonic Velocity Electric Arc Spraying, 45~90 degree of angle, distance are 100~250mm, and air presses 0.5~1Mpa.

The process conditions of spraying are：28~36V of arc voltage, 100~500A of spraying current, 1~4m of primary air amount³/ Min, line sending powder 25~30kg/h of amount, coating layer thickness are 20 μm~150um.

Flame length can be more than 2~3 meters, and for temperature up to 5000~7000 degree, powder falls 50 degree or so of roller surface temperature, powder Reaction synthesizes new composition in flame, and reticulated ceramic, hard metal cermets phase are formed after spray fusing, and roller surface forms site pottery Porcelain, hard metal cermets phase, FeB, wear-resisting property are twice of chromium plating or more, chromium plating 8~10um cold rolling rollings sheet metal 5000~ 6000 tons, roll rolls 13000~20000 tons of sheet metal after supersonic spray coating spray fusing.Roughness is 0.2 after rubbing down, laser roughening Roughness is 0.35, can roll high-grade sheet metal, and surface is smooth, and density is closeer, and bending strength improves, and steel plate elasticity is more preferable, resists Punching performance enhances one times or more than chromium plating cold roll rolled plate.

The noncrystal and ceramic net-point shape of cold roll Surface Fe, reaction formation are FeB, SiC, Cr₃C₂, TiC, NaF catalytic golds Belong to reaction, makes ferrous metal between 600~700 temperature there are one apparent heat release zone, this section is decrystallized of coating, is applied Crystallization change drastically occurs at 621 degree for layer, forms nano amorphous phase；The iron-based amorphous coating of the present invention, reaction form net Shape ceramic phase and amorphous coating improve bond strength with laser melting coating cold roll, more resistant, lower more resistant to corruption, cost.

Claims (1)

1. a kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method：It is characterized in that：Its step are as follows：

1）Cold roll workpiece surface deoils, sandblasting, surface de-oxidation layer, surface texturing；

2）Fe-based self-fluxing alloy is prepared as spray coating powder, cold roll workpiece is sprayed on by the way of Ultrasonic Arc Sprayed Surface, spraying thickness is 50~100um, and in spraying process, temperature is 5000~7000 degree, the air pressure of spraying for 0.6~ 1mpa；Form the Fe-based self-fluxing alloy amorphous coating；It is the sum of by weight percent 100% meter, the Fe-based self-fluxing alloy In element composition and the mass percent of each element be：5~11% Cr, 3.0~5.0% B, 2.0~5.5% Si, 2~ 5% C, 1~3% W, 0.3~1% Mo, 0.1~1% Nb, 0.1~3% Y, 1~5% NaBH₄And K₂WO₄And NaF, 0.5 ~2% nano silicon dioxide, 1~6% nano-titanium dioxide, surplus Fe；Powder is mixed 120 minutes with fluid bed, then is used Sizes of balls rotates into capable mixing with rotating speed per minute 200~260, is inverted again 12 hours after first rotating forward 12 hours, then per minute 60~ 120 rotate into row slow-speed 24 hours, are then placed in subzero 196 degree and carry out deep cooling 36 hours, then at 200 degree above freezing go within 24 hours Stress dries；

3）Hardness is HV900~1200 after spray fusing, and Ultrasonic Arc Sprayed bond strength is 68mpa, with being combined after laser spray fusing Intensity is 400Mpa.