CN104962852A - Method for enabling surface of rolled steel to be bright and smooth - Google Patents
Method for enabling surface of rolled steel to be bright and smooth Download PDFInfo
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- CN104962852A CN104962852A CN201510368500.5A CN201510368500A CN104962852A CN 104962852 A CN104962852 A CN 104962852A CN 201510368500 A CN201510368500 A CN 201510368500A CN 104962852 A CN104962852 A CN 104962852A
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Abstract
The invention discloses a method for enabling the surface of rolled steel to be bright and smooth. The method comprises the steps of adopting 12-15% sodium carbonate and a mixed solution of 3-6% of potassium pyrophosphate and 8-10% of triethanolamine for washing the rolled steel; then adopting a mixed solution of 15% H2SO4 and 0.1% thiourea at the temperature being 40 DEG C to 60 DEG C for washing the rolled steel; then, impregnating the rolled steel into the mixed solution of ammonium chloride and zinc chloride for 1-2 min; performing heating after impregnation is performed, then conducting drying, and placing the rolled steel into molten zinc when the temperature of the rolled steel ranges from 110 DEG C to 130 DEG C, wherein the temperature of the molten zinc ranges from 435 DEG C to 470 DEG C, and the duration of impregnation ranges from 0.5 min to 1.5 min; then, placing the rolled steel into a passivation solution for passivation, and then placing the rolled steel into water with the temperature of 40-45 DEG C for cooling to obtain the finished product. By adopting the method for processing the surface of the rolled steel, the brightness and smoothness of the rolled steel can be improved, and chromatic aberration is restrained.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind ofly make the level and smooth method of steel surface light.
Background technology
Steel are widely used, various in style, according to the difference of section form, steel are generally divided into the large class of section bar, sheet material, tubing and metal products four.The material of steel are steel ingots, steel billet or steel are made by press working definite shape, size and performance.The processing of major part steel is all by press working, makes processed steel (base, ingot etc.) produce viscous deformation.Different according to steel processing temperature, cold working and hot-work two kinds can be divided into.
The surface treatment of steel has chemical treatment and physical treatment two kinds, wherein the former is based on pickling, by after steel surface generation chemical reaction carries out corrosion treatment, the Wire brush roller cleaning that recycling 304# Stainless Steel Wire (acid and alkali-resistance solution) is made totally just can be effective; Physical treatment, in the mode of machining processes, as modes such as ball blast, sandblasting, high pressure waters, completes process and is effective.
The roughness compared with Small Distance and small peak valley that surfaceness (surface roughness) refers to that finished surface has.Distance (pitch of waves) very little (at below 1mm) between its two crest or two troughs, it belongs to microcosmos geometric shape error.Surfaceness is less, then surface is more smooth.
Surfaceness is generally formed by adopted working method and other factors, the high-frequency vibration the etc. when friction such as, in the course of processing between cutter with piece surface, chip are separated in the viscous deformation of upper layer metal and process system.Due to the difference of working method and workpiece material, the depth, density, shape and texture that surface to be machined is left a trace have difference.
How reducing the surfaceness of steel, is that this area is being studied always, and problem anxious to be resolved.
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind for the treatment of process can be that the surface of steel has good luminance brightness and smoothness.
Technical scheme: the invention provides a kind of method making steel surface light, concrete steps are as follows:
Adopt 12 ~ 15% sodium carbonate and the potassium pyrophosphate of 3 ~ 6%, the trolamine of 8 ~ 10% mixed solution steel are washed; Adopt the H of 15% again
2sO
4with the mixed solution of 0.1% thiocarbamide, temperature is 40 ~ 60 DEG C, washs steel; In this step, cause coating adhesion bad if condition controls bad meeting, do not plate zinc or Zinc Scaling, therefore, the temperature of mixed solution preferably 55 DEG C.
Then above-mentioned steel are immersed in the mixing solutions of ammonium chloride and zinc chloride, dipping 1 ~ 2min; Further study discovery: NH in described ammonium chloride and the mixing solutions of zinc chloride
4the concentration of Cl is 100 ~ 150g/L, ZnCl
2concentration be 150 ~ 180g/L, and better effects if when temperature is 70 ~ 85 DEG C, before can remaining on immersion plating, workpiece has certain activity and avoids secondary oxidation, is combined with matrix to strengthen coating.
Flooded post-heating, after oven dry, when steel temperature is 110 ~ 130 DEG C, insert in zinc liquid, zinc liquid temperature is 435 ~ 470 DEG C, and dipping 0.5 ~ 1.5min, at the uniform velocity draw from zinc liquid, extraction speed is generally 1.5 meters/min.In this process, the temperature of zinc liquid is extremely important, and temperature is too low, zinc liquid poor fluidity, and coating is thick and uneven, easily produces sagging, and visual appearance is poor; Temperature is high, zinc liquid good fluidity, and zinc liquid easily departs from workpiece, and reduce sagging and the generation of elephant skin phenomenon, strong adhesion, coating is thin, and outward appearance is good, and production efficiency is high; But temperature is too high, workpiece and zinc pot iron loss seriously, produce a large amount of cadmia, affect zinc-impregnating layer quality and easily cause aberration to make surface color ugly, and zinc consumption is high.Therefore, zinc liquid temperature preferably 435 ~ 445 DEG C.
Then above-mentioned steel are inserted passivation in passivating solution, the Na of described passivating solution to be concentration be 80 ~ 100g/L
2cr
2o
7it is the mixing solutions of the sulfuric acid of 3 ~ 4ml/L with concentration.This process can improve steel surface weather-resistant performance, reduces or extends white rust time of occurrence, keeps coating to have good outward appearance.Insert in 40 ~ 45 DEG C of water again, cooling, obtains product.
Beneficial effect: adopt method process steel surface of the present invention, bright property and the smoothness of steel can be increased, and suppress the generation of aberration.
Embodiment:
Embodiment 1
Adopt 12% sodium carbonate and the potassium pyrophosphate of 3%, the trolamine of 8% mixed solution steel are washed, till making steel be flooded profit completely.Then the H of 15% is adopted
2sO
4mixed solution with 0.1% thiocarbamide, washs steel, mixeding liquid temperature 60 DEG C.
Above-mentioned steel are immersed (NH in the mixing solutions of ammonium chloride and zinc chloride
4cl concentration 150g/L, ZnCl
2concentration 150g/L), temperature is 70 DEG C, and dipping time is 1min.
After having flooded, heating, after oven dry, when steel temperature is 120 DEG C, enter in zinc liquid, zinc liquid temperature is 450 DEG C, and dipping 0.5min, at the uniform velocity draw from zinc liquid, extraction speed is generally 1.5 meters/min.
Then above-mentioned steel are inserted passivation in passivating solution, passivating solution is the Na of 80 ~ 100g/L
2cr
2o
7with the mixing solutions of 3 ~ 4ml/L sulfuric acid.Then insert in 40 DEG C of water, cooling.Obtain product.
This product appearance is bright, careful, no sag, elephant skin phenomenon.Surface roughness Ra 0.16 μm.
Embodiment 2
Adopt 15% sodium carbonate and the potassium pyrophosphate of 6%, the trolamine of 8% mixed solution steel are washed, till making steel be flooded profit completely.Then the H of 13% is adopted
2sO
4mixed solution with 0.1% thiocarbamide, washs steel, mixeding liquid temperature 40 DEG C.
Above-mentioned steel are immersed (NH in the mixing solutions of ammonium chloride and zinc chloride
4cl concentration 150g/L, ZnCl
2concentration 150g/L), temperature is 85 DEG C, and dipping time is 2min.
After having flooded, heating, after oven dry, when steel temperature is 120 DEG C, enter in zinc liquid, zinc liquid temperature is 450 DEG C, and dipping 0.5min, at the uniform velocity draw from zinc liquid, extraction speed is generally 1.5 meters/min.
Then above-mentioned steel are inserted passivation in passivating solution, passivating solution is the Na of 80g/L
2cr
2o
7with the mixing solutions of 4ml/L sulfuric acid.
Then insert in 40 DEG C of water, cooling.Obtain product.This product appearance is bright, careful, no sag, elephant skin phenomenon.Surface roughness Ra 0.18 μm.
Embodiment 3
Adopt 12% sodium carbonate and the potassium pyrophosphate of 3%, the trolamine of 8% mixed solution steel are washed, till making steel be flooded profit completely.Then the H of 15% is adopted
2sO
4mixed solution with 0.1% thiocarbamide, washs steel, mixeding liquid temperature 60 DEG C.
Above-mentioned steel are immersed (NH in the mixing solutions of ammonium chloride and zinc chloride
4cl concentration 100g/L, ZnCl
2concentration 150g/L), temperature is 85 DEG C, and dipping time is 1min.
After having flooded, heating, after oven dry, when steel temperature is 120 DEG C, enter in zinc liquid, zinc liquid temperature is 450 DEG C, and dipping 0.5min, at the uniform velocity draw from zinc liquid, extraction speed is generally 1.5 meters/min.
Then above-mentioned steel are inserted passivation in passivating solution, passivating solution is the Na of 100g/L
2cr
2o
7with the mixing solutions of 4ml/L sulfuric acid.Then insert in 40 DEG C of water, cooling.Obtain product.
This product appearance is bright, careful, no sag, elephant skin phenomenon.Surface roughness Ra 0.17 μm.
Claims (7)
1. make the method that steel surface light is level and smooth, it is characterized in that carrying out according to the following steps:
Adopt 12 ~ 15% sodium carbonate and the potassium pyrophosphate of 3 ~ 6%, the trolamine of 8 ~ 10% mixed solution steel are washed; Adopt the H of 13 ~ 15% again
2sO
4with the mixed solution of 0.1 ~ 0.2% thiocarbamide, temperature is 40 ~ 60 DEG C, washs steel;
Then above-mentioned steel are immersed in the mixing solutions of ammonium chloride and zinc chloride, dipping 1 ~ 2min; Heating, after oven dry, when steel temperature is 110 ~ 130 DEG C, inserts in zinc liquid, and dipping 0.5 ~ 1.5min, at the uniform velocity draws from zinc liquid;
Then above-mentioned steel are inserted passivation in passivating solution, then insert in 40 ~ 45 DEG C of water, cooling, obtains product.
2. the method for claim 1, is characterized in that in the mixing solutions of described ammonium chloride and zinc chloride, NH
4the concentration of Cl is 100 ~ 150g/L, ZnCl
2concentration be 150 ~ 180g/L.
3. the method for claim 1, is characterized in that the temperature of the mixing solutions of described ammonium chloride and zinc chloride is 70 ~ 85 DEG C.
4. the method for claim 1, is characterized in that described zinc liquid temperature is 435 ~ 470 DEG C.
5. the method for claim 1, is characterized in that described zinc liquid temperature is 435 ~ 445 DEG C.
6. the method for claim 1, is characterized in that described extraction, and speed is 1.5 meters/min.
7. the method for claim 1, is characterized in that described passivating solution to be concentration is the Na of 80 ~ 100g/L
2cr
2o
7it is the mixing solutions of the sulfuric acid of 3 ~ 4ml/L with concentration.
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|---|---|---|---|
| CN201510368500.5A CN104962852A (en) | 2015-06-29 | 2015-06-29 | Method for enabling surface of rolled steel to be bright and smooth |
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| CN201510368500.5A CN104962852A (en) | 2015-06-29 | 2015-06-29 | Method for enabling surface of rolled steel to be bright and smooth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953716A (en) * | 2018-07-06 | 2018-12-07 | 上海市特种设备监督检验技术研究院 | A kind of preparation method of easy fusing alloy plug |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056539A (en) * | 2012-12-31 | 2013-04-24 | 潍坊海生能源科技有限公司 | Manufacturing craft for pressure-bearing heat exchanging liner of solar water heater |
-
2015
- 2015-06-29 CN CN201510368500.5A patent/CN104962852A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056539A (en) * | 2012-12-31 | 2013-04-24 | 潍坊海生能源科技有限公司 | Manufacturing craft for pressure-bearing heat exchanging liner of solar water heater |
Non-Patent Citations (1)
| Title |
|---|
| 杨亚莉: "水基型油污清洗剂的配方设计", 《大众科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953716A (en) * | 2018-07-06 | 2018-12-07 | 上海市特种设备监督检验技术研究院 | A kind of preparation method of easy fusing alloy plug |
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Application publication date: 20151007 |
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