CN101121873A - Stainless steel surface de-scaling abrasive material and using method thereof - Google Patents
Stainless steel surface de-scaling abrasive material and using method thereof Download PDFInfo
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- CN101121873A CN101121873A CNA2007101394180A CN200710139418A CN101121873A CN 101121873 A CN101121873 A CN 101121873A CN A2007101394180 A CNA2007101394180 A CN A2007101394180A CN 200710139418 A CN200710139418 A CN 200710139418A CN 101121873 A CN101121873 A CN 101121873A
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Abstract
The invention relates to a grinding medium for stainless-steel surface descaling and a method of utilization. The descaling and grinding medium is characterized in that steel sand is added into the steel shot, and the proportions of the steel sand and steel shot (calculated by weight percent) are: steel sand (3-19) and steel shot (1); the granularity of the steel sand is 0.35mm-0.45mm, and the granularity of the steel shot is 0.3mm-0.4mm. In terms of method of utilization, (1) adjustment of shot-blast coefficient: the coefficient of the shot-blast is lowed to 1.2-1.3 and the rotation speed of the impeller head is timely reduced to 1,850 r/min; (2) adjustment of relevant process: during the stable stage of grinding medium grinding, the heating temperature is increased gradually, and the temperature of the plate increases to 1125-1145 DEG C, the pressure of the brushing roller and cleaning water is reduced. If the grinding medium and the method of utilization are applied, the production cost can be reduced and the coarse value of the surface cold-rolled raw materials can be reduced to a large extent.
Description
Technical field
The present invention relates to a kind of stainless steel surface de-scaling abrasive material and using method thereof.
Background technology
The stainless-steel cold-rolling raw material in course of hot rolling, produce fine and close oxide skin densification attached to surface of steel plate, in acid cleaning process, having a strong impact on the smooth finish of clean effect and stainless steel surface, so must remove the oxide skin of raw material surface compact.Generally be to adopt mechanical descaling with abrasive material, the existing mechanical abrasive material is a shot, adopt that the shot de-scaling causes easily after the pickling that the Stainless Steel Watch surface oxidized skin is residual, roughness increase etc. and influence stainless steel finished surface quality, scale removal effect is poor, the roughness of stainless steel surface reaches more than the 4 μ m after the pickling, and it is big as the shot consumption of abrasive material, the loss per ton steel of shot is up to 5Kg, because the cause for quality of shot, it is unclean to cause iron scale from surface of stainless steel to beat simultaneously, and the shot dust is big, has increased dedusting pressure, further has influence on the quality of stainless steel surface.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing stainless steel surface de-scaling abrasive material and using method thereof, the invention provides the effective stainless-steel cold-rolling stock chart surface de-scaling abrasive material of a kind of stainless steel surface de-scaling, the using method of this stainless steel surface de-scaling abrasive material is provided simultaneously.
Technical scheme of the present invention is to allocate steel sand into to become compound abrasive in existing shot as the stainless steel de-scaling abrasive material, and the proportioning of steel sand and shot (weight part) is:
Steel sand 3-19 shot 1
The granularity of steel sand is 0.35mm-0.45mm, the granularity of shot is 0.3mm-0.4mm, the granularity of steel sand and shot can be identical, also can be different, main basis is decided the requirement of surfaceness, in the compound abrasive of general stainless-steel cold-rolling raw material surface de-scaling, steel sand is identical with the granularity of shot.
According to the requirement difference to the surfaceness behind the acid-washing stainless steel, the proportioning of steel sand and shot (weight part) is divided into four kinds in the compound abrasive:
Steel sand 7.5 shots 2.5;
Steel sand 8.5 shots 1.5;
Steel sand 9.0 shots 1;
Steel sand 9.5 shots 0.5.
The using method of this stainless steel surface de-scaling abrasive material has mainly been improved 2 points,
(1) ball blast parameter adjustment
According to the stock chart surface roughness that records (upper and lower surface de-scaling simultaneously at every turn, a de-scaling) and the clean degree (each beat clean degree) of beating of surperficial iron scale, targetedly the ball blast coefficient is reduced to 1.2-1.3 by 2.0, the shot amount that ramming head is dished out reduces, and in time the ramming head rotating speed is corrected adjustment accordingly, the ramming head rotating speed is reduced to 1850 rev/mins-1900 rev/mins by 2000 rev/mins, in the process of the test afterwards, by continuous adjustment ramming head angle, the compound abrasive that ramming head is dished out can cover surface of steel plate uniformly, just can guarantee to make full use of the scale removal effect of compound abrasive, general ball blast coefficient and ramming head rotating speed and corresponding roughness relation see Table 1:
Table 1
| Initial stage | Second phase | Three phases | The fourth phase | Five phases | This descaling method | |
| The ball blast coefficient | 2.0 | 1.8 | 1.6 | 1.8 | 1.5 | 1.2 |
| The ramming head rotating speed | 2200 | 2000 | 1850 | 1850 | 2200 | 1850 |
| Corresponding roughness μ m (≈) | 5.5 more than | 4.2～4.52 | 3.76～3.92 | 3.42～3.73 | 3.19～3.67 | 2.76～3.16 |
(2) related process adjustment
In the steady stage of using abrasive material, lifting along with the annealing and pickling process speed, in order to guarantee the removal of surface of steel plate oxide skin, when suitably adjusting the ball blast parameter, progressively improve Heating temperature, make the plate temperature reach 1125 ℃-1145 ℃, adjustment is scrubbed the brush roll pressure of equipment and is reduced rinse water pressure, (brush roll pressure is by depressing current control, the electric current of depressing of brush roll is adjusted to 25A-35A by 55A, reduces brush roll pressure) the maximum 16bar of rinse water pressure, guarantee that the raw material surface reaches the degree of cleaning effect of expection, reach under less ramming coefficient and rotating speed, steel strip surface just can obtain good roughness and degree of cleaning.
This stainless steel surface de-scaling abrasive material and using method thereof adopt the compound abrasive that cooperates steel sand, when de-scaling, adjust ball blast coefficient and ramming head rotating speed and related process is adjusted, make the consumption of de-scaling medium reduce 3Kg/t～4Kg/t (by reducing to more than 5 below 1), significantly reduced production cost, wherein emphasis is the effect that compound abrasive reaches; Adopt the compound abrasive de-scaling, can fully effectively utilize the de-scaling medium, remove the oxide skin of close attachment more completely on stainless-steel cold-rolling raw material surface, the roughness value on cold rolling feeds surface is obviously descended, the minimal roughness value drops to Ra=2.76 μ m, has improved the cold-rolling stainless steel surface quality; Solved the factor of traditional shot scale removal effect difference, adopted compound abrasive de-scaling efficient to reach 99.6% raising scale removal effect, increased the product benefit based on steel sand; After adopting the compound abrasive de-scaling, by corresponding adjustment ball blast and corresponding technology, the condition that improves equipment is come down to a lower group the raw material that causes because of the clean reason of iron scale not conform to rate and is significantly reduced.
Embodiment
Describe the embodiment of this stainless steel surface de-scaling abrasive material and using method thereof in detail below in conjunction with embodiment, but the embodiment of this stainless steel surface de-scaling abrasive material and using method thereof is not limited to following embodiment.
Stainless steel surface de-scaling abrasive material embodiment
Embodiment one
Present embodiment is to remove 300 type Stainless Steel Watch surface oxidized skins, makes the preparation of pickling rear surface roughness Ra≤3.5 μ m, and the proportioning of steel sand and shot (weight part) is in the compound abrasive:
Steel sand 9.5 shots 0.5
The granularity of steel sand is 0.45mm, and the granularity of shot is 0.4mm.
Embodiment two
Present embodiment is to remove 400 type Stainless Steel Watch surface oxidized skins, makes the preparation of pickling rear surface roughness Ra≤4 μ m, and the proportioning of steel sand and shot (weight part) is in the compound abrasive:
Steel sand 7.5 shots 2.5
The granularity of steel sand is 0.40mm, and the granularity of shot is 0.35mm.
Embodiment three
Present embodiment is to remove 300 type Stainless Steel Watch surface oxidized skins, makes the preparation of pickling rear surface roughness Ra≤3.5 μ m, and the proportioning of steel sand and shot (weight part) is in the compound abrasive:
Steel sand 8.5 shots 1.5
The granularity of steel sand is 0.45mm, and the granularity of shot is 0.4mm.
Embodiment four
Present embodiment is to remove 400 type Stainless Steel Watch surface oxidized skins, makes the preparation of pickling rear surface roughness Ra≤4 μ m, and the proportioning of steel sand and shot (weight part) is in the compound abrasive:
Steel sand 9.0 shots 1
The granularity of steel sand is 0.40mm, and the granularity of shot is 0.40mm.
Stainless steel surface de-scaling abrasive material using method embodiment
Below with the using method of squama abrasive material embodiment one with embodiment two these stainless steel surface de-scaling abrasive materials of explanation.
Embodiment one
What present embodiment was removed is 300 type stainless steels, and it removes the roughness Ra≤3.5 μ m after the surface scale pickling, adopts the compound abrasive of stainless steel surface de-scaling abrasive material embodiment one.In the de-scaling process, do 2 adjustment.
(1) ball blast parameter adjustment
Present embodiment is reduced to 1.2 with the ball blast coefficient, and the shot amount that ramming head is dished out reduces, and in time the ramming head rotating speed is corrected adjustment accordingly, and the ramming head speed drop is low to moderate 1850 rev/mins.
(2) related process adjustment
In the steady stage of using abrasive material, lifting along with the annealing and pickling process speed, when suitably adjusting the ball blast parameter, progressively improve Heating temperature, make the plate temperature reach 1125 ℃-1145 ℃, adjustment scrub equipment brush roll pressure and reduce rinse water pressure (with brush roll depress current setting to 25A), rinse water pressure (maximum 16bar), guarantee that the raw material surface reaches the degree of cleaning effect of expection, reach under less ramming coefficient and rotating speed, steel strip surface obtains good roughness and degree of cleaning, and pickling rear surface roughness is Ra2.76～3.16 μ m.
Embodiment two
What present embodiment was removed is 400 type stainless steels, and it removes the roughness Ra≤4.0 μ m after the surface scale pickling, adopts the compound abrasive of stainless steel surface de-scaling abrasive material embodiment two.In the de-scaling process, do 2 adjustment.
(1) ball blast parameter adjustment
Present embodiment is reduced to 1.3 with the ball blast coefficient, and the shot amount that ramming head is dished out reduces, and in time the ramming head rotating speed is corrected adjustment accordingly, and the ramming head speed drop is low to moderate 1900 rev/mins.
(2) related process adjustment
In the steady stage of using abrasive material, lifting along with the annealing and pickling process speed, when suitably adjusting the ball blast parameter, progressively test improves Heating temperature, make the plate temperature reach 860 ℃-900 ℃, adjustment scrub equipment brush roll pressure and reduce rinse water pressure and (brush roll depressed current setting to 35A, to reduce the pressure of scrubbing unit brush roll), rinse water pressure (maximum 16bar), guarantee that the raw material surface reaches the degree of cleaning effect of expection, reach under less ramming coefficient and rotating speed, steel strip surface obtains good roughness and degree of cleaning, and pickling rear surface roughness is Ra 2.76～3.16 μ m.
Claims (3)
1. stainless steel surface de-scaling abrasive material, it is characterized in that: allocate steel sand into and become compound abrasive in the shot of stainless steel de-scaling abrasive material, the proportioning of steel sand and shot (weight part) is:
Steel sand 3-19 shot 1
The granularity of steel sand is 0.35mm-0.45mm, and the granularity of shot is 0.3mm-0.4mm, or the granulometric facies of steel sand and shot together.
2. stainless steel surface de-scaling abrasive material according to claim 1 is characterized in that: the proportioning of steel sand and shot (weight part) is divided into following four kinds in the compound abrasive:
Steel sand 7.5 shots 2.5;
Steel sand 8.5 shots 1.5;
Steel sand 9.0 shots 1;
Steel sand 9.5 shots 0.5.
3. the using method of claim 1 or 2 described stainless steel surface de-scaling abrasive materials, in the de-scaling process, do 2 adjustment:
(1) ball blast parameter adjustment
The ball blast coefficient is reduced to 1.2-1.3, and the shot amount that ramming head is dished out reduces, and in time the ramming head rotating speed is corrected adjustment accordingly, and the ramming head speed drop is low to moderate 1850 rev/mins-1900 rev/mins;
(2) related process adjustment
In the steady stage of using abrasive material, when adjusting the ball blast parameter, progressively improve Heating temperature, make the plate temperature reach 1125 ℃-1145 ℃, adjustment is scrubbed the brush roll pressure of equipment and is reduced rinse water pressure, brush roll pressure is by depressing current control, and the electric current A that depresses of brush roll is adjusted to 25A-35A, with the pressure of the brush roll that reduces scrubbing unit.
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| CNA2007101394180A CN101121873A (en) | 2007-09-12 | 2007-09-12 | Stainless steel surface de-scaling abrasive material and using method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477283A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Metal abrasive for processing surface of special coating hold with priming paint |
| CN102477284A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Metal abrasive for treating surface of primer-free specially-coated cabin |
| CN103831627A (en) * | 2014-03-05 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate |
| CN105643470A (en) * | 2016-02-04 | 2016-06-08 | 江苏鑫华能环保工程股份有限公司 | Wet type steel strip acidless descaling technology and equipment of technology |
| CN109333369A (en) * | 2018-10-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | The method for reducing hot plate Shot Blasting rear surface roughness |
| CN111993216A (en) * | 2020-07-02 | 2020-11-27 | 山西太钢不锈钢股份有限公司 | Method for manufacturing duplex stainless steel hot-rolled middle plate with surface roughness Ra less than or equal to 5 mu m |
| CN112501422A (en) * | 2020-11-27 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Surface treatment method for 304 series high-grade panel stainless steel raw material |
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2007
- 2007-09-12 CN CNA2007101394180A patent/CN101121873A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477283A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Metal abrasive for processing surface of special coating hold with priming paint |
| CN102477284A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Metal abrasive for treating surface of primer-free specially-coated cabin |
| CN102477284B (en) * | 2010-11-26 | 2015-03-11 | 大连船舶重工集团有限公司 | Metal abrasive for treating surface of primer-free specially-coated cabin |
| CN102477283B (en) * | 2010-11-26 | 2015-08-26 | 大连船舶重工集团有限公司 | Spy with priming paint is coated with cabin surface treatment metal abrasives |
| CN103831627A (en) * | 2014-03-05 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate |
| CN103831627B (en) * | 2014-03-05 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | A kind of method reducing Cold-Rolled Nickel system stainless steel bright plate surface roughness |
| CN105643470A (en) * | 2016-02-04 | 2016-06-08 | 江苏鑫华能环保工程股份有限公司 | Wet type steel strip acidless descaling technology and equipment of technology |
| CN109333369A (en) * | 2018-10-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | The method for reducing hot plate Shot Blasting rear surface roughness |
| CN111993216A (en) * | 2020-07-02 | 2020-11-27 | 山西太钢不锈钢股份有限公司 | Method for manufacturing duplex stainless steel hot-rolled middle plate with surface roughness Ra less than or equal to 5 mu m |
| CN112501422A (en) * | 2020-11-27 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Surface treatment method for 304 series high-grade panel stainless steel raw material |
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