CN109333369A - The method for reducing hot plate Shot Blasting rear surface roughness - Google Patents
The method for reducing hot plate Shot Blasting rear surface roughness Download PDFInfo
- Publication number
- CN109333369A CN109333369A CN201811273299.2A CN201811273299A CN109333369A CN 109333369 A CN109333369 A CN 109333369A CN 201811273299 A CN201811273299 A CN 201811273299A CN 109333369 A CN109333369 A CN 109333369A
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- China
- Prior art keywords
- shot
- granularity
- surface roughness
- hot plate
- rear surface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
Abstract
The present invention provides a kind of method for reducing hot plate Shot Blasting rear surface roughness, comprising: selection ball blast medium, the ball blast medium are selected as shot；Shot total amount < 2%, 0.3mm~0.425mm granularity shot total amount of optimization shot granularity, 0.5mm and the above granularity reaches 90% or so；Feed bin granularity mixing ratio is controlled, feed bin granularity mixing ratio control of the shot in shot-blasting machine feed bin is 50% or more the shot accounting of 0.3mm~0.355mm granularity, shot accounting < 5% of 0.5mm and the above granularity.Utilize the method for reduction hot plate Shot Blasting rear surface roughness of the invention, it can effectively solve the problem that surface of steel plate throwing was beaten compared with the problems such as deep, surface topography is undesirable, surface roughness is larger, available highest cleaning efficiency, while the cold plate surface roughness after Shot Blasting can significantly reduce.
Description
Technical field
The invention belongs to rolled stainless steel technical field more particularly to a kind of reduction hot plate Shot Blasting rear surface roughness
Method.
Background technique
As stainless steel industry develops, customer demand diversification, for the requirement for meeting high-grade ornament materials, belt steel surface
Belt steel surface roughness can be reduced urgently in raising, especially raising strip surface quality.
In the prior art, it carries out needing to carry out pickling, i.e. stainless steel hot line before subsequent handling after stainless steel hot-rolling annealing
Pickling, the purpose is to remove the iron scale i.e. iron scale formed in hot rolling and annealing process in steel strip surface.Due to stainless steel
Containing the chromium oxide in conjunction with matrix more closely in iron scale, cause pickling difficult.It therefore, is raising pickling effect, it is necessary to
It is pre-processed before carrying out pickling before pickling.For cold-rolled steel coils, pretreatment generallys use chemical de-scaling method before pickling, and for heat
Stainless steel (i.e. hot plate) is rolled, is pre-processed before pickling generally using mechanical scale breading method, such as Shot Blasting, descaling rolls processing.
Shot Blasting is the surface for the strip for making the shot of very little to be injected in very much operation at high speed using centrifugal force, by steel
The kinetic energy of ball is converted into the impact force to the surface of strip, so that the oxide skin of strip is detached from from matrix, to reach removing band
The effect of steel surface iron scale.The quality of Shot Blasting depends on quality, quantity, the jet velocity, punching of shot in shot-blasting machine feed bin
Hit direction, granularity mixing ratio.In the case where the available effective control of quality, jet velocity, impact direction, the granularity of shot
The control of mixing ratio and shot amounts of particles is just particularly important during Shot Blasting.
In the prior art, due to lacking effective Shot Blasting technique, the hotplate surface roughness after Shot Blasting is higher,
It is unable to satisfy the market demand.Therefore Shot Blasting technique how is improved to reduce hot plate Shot Blasting rear surface roughness and become this
Field book personnel technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for reducing hot plate Shot Blasting rear surface roughness, utilize the present invention
Method, by reasonably select ball blast medium, optimization shot granularity and control feed bin granularity mixing ratio, heat can be effectively reduced
Plate Shot Blasting rear surface roughness, so that hot plate Shot Blasting rear surface roughness is maintained at the level of Ra≤3.2 μm.
For this purpose, the method for reduction hot plate Shot Blasting rear surface roughness of the invention includes:
Ball blast medium is selected, the ball blast medium is selected as shot；
Shot total amount < 2%, 0.3mm~0.425mm granularity shot of optimization shot granularity, 0.5mm and the above granularity is total
Amount reaches 90% or so；
Control feed bin granularity mixing ratio, shot in shot-blasting machine feed bin feed bin granularity mixing ratio control be 0.3mm~
50% or more the shot accounting of 0.355mm granularity, shot accounting < 5% of 0.5mm and the above granularity.
Preferably, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, shot size distribution are as follows:
| Granularity | 0.125mm | 0.18mm | 0.3mm | 0.355mm | 0.425mm | 0.5mm | 0.6mm | 0.71mm |
| Shot | 0.01% | 7.42% | 17.55% | 39.56% | 33.60% | 1.85% | 0.01% | 0.00% |
Preferably, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, feed bin granularity mixing ratio
Control are as follows:
| Granularity | 0.125mm | 0.18mm | 0.3mm | 0.355mm | 0.425mm | 0.5mm | 0.6mm | 0.71mm |
| Shot | 0.79% | 10.29% | 18.53% | 35.65% | 31.14% | 3.42% | 0.18% | 0.00% |
Preferably, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, the shot is high-carbon
Cast steel ball.
Preferably, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, control feed bin granularity is mixed
The method of composition and division in a proportion are as follows:
A) fixed addition mode, every 1.5 tons of abrasive material of supplement of uniformly continuous addition in shot-blasting machine 24 hours；
B) control ball blast curtain separator is uniformly distributed, and selection by winnowing wind speed reaches 6~10Km/h of normal range (NR)；
C) ratio≤10% of the effective particle of size >=0.2mm in dedusting ash is controlled.
Using the method for reduction hot plate Shot Blasting rear surface roughness of the invention, by selecting shot to be situated between as ball blast
Matter, avoid using containing the compound abrasive with corner angle steel sand, can effectively solve in the prior art surface of steel plate throwing beat relatively deeply, surface
The problems such as pattern is undesirable, surface roughness is larger；By optimizing the distribution of shot granularity, available highest cleaning effect
Rate, while the cold plate surface roughness after Shot Blasting can significantly reduce；By optimizing the feed bin granularity mixing ratio of shot, keep away
Exempt from bulky grain and residual dell is beaten to surface throwing, and can guarantee that removing surface grade meets expected requirement, additionally can reduce
The effective granule content of dedusting ash, and ball blast medium can be saved.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings, in attached drawing:
Figure 1A is the enlarged drawing of ball blast compound abrasive used in the prior art；
Figure 1B is the amplification of shot selected in the method for reduction hot plate Shot Blasting rear surface roughness of the invention
Figure；
Fig. 2 is the schematic diagram of the method for reduction hot plate Shot Blasting rear surface roughness of the invention；
Fig. 3 controls feed bin granularity mixing ratio institute in the method for reduction hot plate Shot Blasting rear surface roughness of the invention
With the schematic diagram of device.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only of the invention
A part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in Fig. 2, the method for reduction hot plate Shot Blasting rear surface roughness of the invention includes: in ball blast medium side
Reasonable selection is optimized in face, while optimizing shot granularity, and control additionally is optimized to feed bin granularity mixing ratio
System.
In the prior art, the ball blast medium for the processing of hotplate surface iron scale is generally high carbon cast steel ball, high carbon cast steel sand
And compound abrasive, wherein compound abrasive refers to the ball blast medium that high carbon cast steel ball and high carbon cast steel sand are mixed in a certain proportion.Figure
1A shows the enlarged drawing of ball blast compound abrasive used in the prior art, under the conditions of amplifying 15 times, it can be seen that mixer mill
Spheric granules accounting is less in material, and steel sand is in irregular shape, has corner angle.Obviously, mixer mill used in the prior art
Steel sand accounting is larger in material, and steel sand has corner angle, and corner angle contact with the strip first when throwing is beaten, since contact area is small, corner angle
Very strong power can be generated to steel plate contact surface, under the effect of efficient de-scaling, surface of steel plate throwing will certainly be brought to beat relatively deep, surface
The problems such as pattern is undesirable, surface roughness is larger.
It is compared by the ingredient to high carbon cast steel ball and compound abrasive, hardness, appearance, at reduction hot plate ball blast of the invention
Preferably high carbon cast steel ball is as ball blast medium in the method for reason rear surface roughness.Figure 1B shows reduction hot plate of the invention and throws
Ball handles the enlarged drawing of shot selected in the method for rear surface roughness, under the conditions of amplifying 15 times, it can be seen that shot
It is then all spherical (a small number of abnormity < 15%) substantially.
In the method for reduction hot plate Shot Blasting rear surface roughness of the invention selected shot in the prior art
Compound abrasive compare, composition, density, hardness are close, theoretically influence on abrasive material consumption little.Shot is because of its spherical shape
And mobility is good compared with compound abrasive, keeps ball blast electric current more stable.In addition, shot is spherical in shape, when throwing is beaten and steel plate contact surface area
Larger, stress is relatively uniform, and it is larger to generate local pressure, and throwing beats depth compared to shallower, is guaranteeing to remove iron scale
Under the premise of, it is ensured that surface roughness is unlikely excessive.
In addition, the granule size of ball blast is affected to the roughness of product surface after Shot Blasting, shot granularity is bigger,
Its impact kinetic energy is bigger, and impact force is also bigger.When selecting shot granularity, under the premise of meeting de-scaling efficiency, to reduce
Surface roughness is used as much as possible lesser shot, it is preferred to use gradation shot.Gradation shot is by 50% or more nominal size
Shot and gradually smaller shot composition, have taken into account impact force and coverage rate, available highest cleaning efficiency and lower
Surface roughness.
Therefore, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, shot has been advanced optimized
Granularity.Table 1, which shows the present invention contrasted with ball blast compound abrasive medium high carbon cast steel ball used in the prior art, reduces hot plate
Shot size distribution situation used in the method for Shot Blasting rear surface roughness.
1 compound abrasive of table is compareed with shot size distribution
| Granularity | 0.125mm | 0.18mm | 0.3mm | 0.355mm | 0.425mm | 0.5mm | 0.6mm | 0.71mm |
| Compound abrasive | 0.01% | 17.20% | 8.79% | 20.97% | 25.99% | 22.13% | 4.72% | 0.19% |
| Shot | 0.01% | 7.42% | 17.55% | 39.56% | 33.60% | 1.85% | 0.01% | 0.00% |
It compares with compound abrasive used in the prior art, it can be seen that it is thick that the present invention reduces hot plate Shot Blasting rear surface
The granularity of shot used in the method for rugosity is integrally less than normal, and the shot accounting of 0.5mm and the above granularity reduces 25% or so, always
Amount < 2%, the shot total amount of 0.5mm and the above granularity can be only 1.86% in a particular embodiment, thus be easier to control material
Storehouse particle size stable；Nominal size is the shot increase about 35% of 0.3mm~0.425mm granularity, and total amount reaches 90% or so, is having
The shot total amount of 0.3mm~0.425mm granularity can achieve 90.71% in body embodiment, to take into account impact force and covering
Rate, available highest cleaning efficiency, while the cold plate surface roughness after Shot Blasting can reduce 0.4%.
Further, it is obtained through test, in a certain range by the control of feed bin granularity mixing ratio, can be effectively reduced ball blast
Cold plate surface roughness that treated.It should be noted that feed bin granularity mixing ratio refers to granularity shown in upper table 1 point
The shot of cloth ratio preparation is that base stock supplements in abrasive process (i.e. plus sand) to feed bin, is controlled in ball blast curtain separator
Under, overall content ratio of the shot of feed bin in feed bin is actually added to, because by sand feeding amount plus the sand frequency and separator wind speed
Deng influence, the feed bin granularity mixing ratio of the shot of various granularities can be different from its shot size distribution ratio.
Therefore, in the method for reduction hot plate Shot Blasting rear surface roughness of the invention, also feed bin granularity is mixed
Than control is optimized.Table 2, which is shown, to be contrasted with ball blast compound abrasive feed bin granularity mixing ratio used in the prior art
The present invention reduces shot feed bin granularity mixing ratio control case used in the method for hot plate Shot Blasting rear surface roughness.
The optimal control of 2 feed bin granularity mixing ratio of table compares
It can be seen that shot is in shot-blasting machine in the method for reduction hot plate Shot Blasting rear surface roughness of the invention
Feed bin granularity mixing ratio control in feed bin is 50% or more the shot accounting of 0.3mm~0.355mm granularity, in specific embodiment
The shot accounting of middle 0.3mm~0.355mm granularity can be 54.18%；Shot accounting < 5% of 0.5mm and the above granularity,
The shot accounting of 0.5mm and the above granularity can be only 3.6% in specific embodiment, and thus, it is possible to by the cold plate after Shot Blasting
Surface roughness Ra is reduced to 3.1 μm by 3.5 μm.
In the method for reduction hot plate Shot Blasting rear surface roughness of the invention, feed bin granularity mixing ratio is carried out excellent
Change the method for control are as follows:
A) fixed addition mode, i.e., every 1.5 tons of abrasive material of supplement of uniformly continuous addition in shot-blasting machine 24 hours；
B) control ball blast curtain separator is uniformly distributed, and selection by winnowing wind speed reaches 6~10Km/h of normal range (NR)；
C) ratio≤10% of the effective particle of size >=0.2mm in dedusting ash is controlled.
Fig. 3 shows control feed bin granularity mixing in the method for reduction hot plate Shot Blasting rear surface roughness of the invention
Than the schematic diagram of equipment therefor, wherein shot is added in virgin material storage bin 1, by remotely controlling pipeline tapping controller 3
Opening degree makes shot equably be added to shot-blasting machine feed bin 4 via feeding tube 2, avoids once concentrating and adds and can effectively control
Feed bin granularity mixing ratio processed.
Embodiment
In the method for the reduction hot plate Shot Blasting rear surface roughness of the embodiment of the present invention, high carbon cast steel ball is selected to make
Granularity for ball blast medium, shot is as listed in Table 1, while feed bin granularity mixing ratio of the shot in shot-blasting machine feed bin being controlled
It is 17% or so for the particle accounting of nominal size 0.3mm；0.5mm dimensions above particle < 5%.Utilize the reduction of the embodiment
The method of hot plate Shot Blasting rear surface roughness can reduce the cold plate surface roughness Ra after Shot Blasting by 3.5 μm
To 3.1 μm, while ton steel ball blast dielectric dissipation is also down to 1.88Kg/ tons of steel by 2.06Kg/ tons of steel, decreases by 8.7%.
The beneficial effect of the method for reduction hot plate Shot Blasting rear surface roughness of the invention includes:
By selecting shot as ball blast medium, avoid effectively solving using containing the compound abrasive with corner angle steel sand
Surface of steel plate throwing was beaten compared with the problems such as deep, surface topography is undesirable, surface roughness is larger in the prior art；
By optimizing the distribution of shot granularity, available highest cleaning efficiency, while the cold plate table after Shot Blasting
Surface roughness can significantly reduce；
By optimize shot feed bin granularity mixing ratio so that the particle accounting of nominal size 0.3mm be 17% or so,
0.5mm or more particle < 5% avoids bulky grain from throwing surface and beats residual dell, and can guarantee that removing surface grade meets and be expected
It is required that additionally can reduce the effective granule content of dedusting ash, and ball blast medium can be saved, the ton steel ball blast dielectric dissipation range of decrease
Up to 8.7%.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although reference
Invention is explained in detail for previous embodiment, those skilled in the art should understand that: it still can be right
Technical solution documented by previous embodiment is modified or equivalent replacement of some of the technical features；And these
It modifies or replaces, the scope of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of method for reducing hot plate Shot Blasting rear surface roughness characterized by comprising
Ball blast medium is selected, the ball blast medium is selected as shot；
Shot total amount < 2%, 0.3mm~0.425mm granularity shot total amount of optimization shot granularity, 0.5mm and the above granularity reaches
To 90% or so；
Feed bin granularity mixing ratio is controlled, feed bin granularity mixing ratio control of the shot in shot-blasting machine feed bin is 0.3mm~0.355mm
50% or more the shot accounting of granularity, shot accounting < 5% of 0.5mm and the above granularity.
2. reducing the method for hot plate Shot Blasting rear surface roughness as described in claim 1, wherein shot size distribution
Are as follows:
3. reducing the method for hot plate Shot Blasting rear surface roughness as claimed in claim 2, wherein feed bin granularity mixing ratio
Control are as follows:
4. reducing the method for hot plate Shot Blasting rear surface roughness as claimed any one in claims 1 to 3, wherein institute
Stating shot is high carbon cast steel ball.
5. reducing the method for hot plate Shot Blasting rear surface roughness as claimed any one in claims 1 to 3, wherein control
The method of feed bin granularity mixing ratio processed are as follows:
A) fixed addition mode, every 1.5 tons of abrasive material of supplement of uniformly continuous addition in shot-blasting machine 24 hours；
B) control ball blast curtain separator is uniformly distributed, and selection by winnowing wind speed reaches 6~10Km/h of normal range (NR)；
C) ratio≤10% of the effective particle of size >=0.2mm in dedusting ash is controlled.
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| CN201811273299.2A CN109333369B (en) | 2018-10-30 | 2018-10-30 | Method for reducing surface roughness after hot plate shot blasting treatment |
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| CN201811273299.2A CN109333369B (en) | 2018-10-30 | 2018-10-30 | Method for reducing surface roughness after hot plate shot blasting treatment |
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Cited By (4)
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| CN110052509A (en) * | 2019-03-29 | 2019-07-26 | 山西太钢不锈钢股份有限公司 | A kind of carbon steel surface treatment method |
| CN111843845A (en) * | 2020-06-28 | 2020-10-30 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Method for removing hardened tooth surface oxide skin |
| CN112518593A (en) * | 2020-12-03 | 2021-03-19 | 天津众达精密机械有限公司 | Shot blasting cleaning method for machining castings |
| CN113370084A (en) * | 2021-01-20 | 2021-09-10 | 江苏美特林科特殊合金股份有限公司 | Pretreatment method of high-temperature alloy return material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110052509A (en) * | 2019-03-29 | 2019-07-26 | 山西太钢不锈钢股份有限公司 | A kind of carbon steel surface treatment method |
| CN111843845A (en) * | 2020-06-28 | 2020-10-30 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Method for removing hardened tooth surface oxide skin |
| CN112518593A (en) * | 2020-12-03 | 2021-03-19 | 天津众达精密机械有限公司 | Shot blasting cleaning method for machining castings |
| CN113370084A (en) * | 2021-01-20 | 2021-09-10 | 江苏美特林科特殊合金股份有限公司 | Pretreatment method of high-temperature alloy return material |
| CN113370084B (en) * | 2021-01-20 | 2023-06-20 | 江苏美特林科特殊合金股份有限公司 | Pretreatment method of high-temperature alloy return material |
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