CN106312829A - Treatment process for scale on surface of fastener raw material - Google Patents
Treatment process for scale on surface of fastener raw material Download PDFInfo
- Publication number
- CN106312829A CN106312829A CN201610909529.4A CN201610909529A CN106312829A CN 106312829 A CN106312829 A CN 106312829A CN 201610909529 A CN201610909529 A CN 201610909529A CN 106312829 A CN106312829 A CN 106312829A
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- China
- Prior art keywords
- raw material
- securing member
- scale
- shot
- water
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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
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- 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
- B24C1/086—Descaling; Removing coating films
Abstract
The invention discloses a treatment process for scale on the surface of a fastener raw material. The process includes the steps that a passing-type shot blasting machine is used for conducting shot blasting on the surface of the fastener raw material so as to remove the scale; spraying is conducted on the surface of the fastener raw material subjected to shot blasting; and the sprayed surface of the fastener raw material is coated with a lubricating layer in a saponification pool, and specifically, supersaturated fatty acid, sodium hydroxide, lime and clear water are added into the saponification pool according to the proportion of 2:1:10:600 to be evenly stirred to prepare a saponification solution, and the supersaturated fatty acid and the sodium hydroxide can be dissolved in water easily. By means of the treatment process, the shot-blasting cleaning quality of the surface of steel can reach the thorough-cleaning level in the Sa2.5 standard of the ISO8501-1 standard issued by the national standardization organization; and meanwhile, the treatment process has no bad influence on the mechanical property index of the raw material, and environment pollution is reduced.
Description
Technical field
The present invention relates to a kind of securing member raw material scale on surface and process technique.
Background technology
Steel after hot rolled or heat treatment have one layer of iron scale to cover at steel surface.The existence of iron scale,
On the one hand affect lubricant effect, on the other hand, when cold group, owing to iron scale hardness is relatively big, easily cause the surfaces such as road plan and lack
Fall into, also can make to draw the power of dialling to increase simultaneously, make die wear aggravate, cause and dial system difficulty, do not reach cold group of steel smooth finish surface
Requirement.So its scale on surface must be cleaned out before cold group by steel, iron scale composition is mainly three oxidations two
Ferrum and ferroso-ferric oxide.
In securing member is conventionally produced, first production technology raw material deoxygenation iron sheet technique is conventional following two
Kind production technology:
One, the method for raw material bending wire shelling, mainly deforms raw material bending wire, draws by means of drawbench is powerful
Power, so that the iron scale of wire surface is stripped in wire rod bending deformation process, but this production technology is only limited in
Former material diameter mild steel raw material below 20 millimeters, if raw material diameter is more than 20 millimeters, raw material be medium carbon steel or
During low-alloy steel, raw-material yield strength increases, the method using bending shelling, raw material metal fiber in flexural deformation and
Under strong pulling force effect, must be destroyed or be pulled off, thus affect the mechanical performance of material, so the shelling of raw material bending wire
Method has certain limitation in securing member produces.
Two, in securing member is conventionally produced, first production technology raw material descaling technique all uses pickling,
Its acid cleaning process flow process is: pickling washing neutralizes surface coating lubricating layer, is also called saponification, and pickling is that securing member produces
In the key that produces of the cold group of steel.
Raw material wire rod pickling there are following problem except iron scale:
(1) owing to, in acid cleaning process, being put affected by acid concentration, pickle temperature and raw material wire rod, metal with
Acid produces chemistry reflection, produces part hydrogen atom, and it penetrates in the crystal lattice of metal, and make it deform, makes hydrogen after deformation
More to metal internal diffusion, its partial hydrogen atom passes metal molecularization, escapes, the partly molecularization of hydrogen atom from acid solution
On " micro-emptying aperture " border that lattice deformability produces, or being mingled with and carry out in hole of metal, hydrogen pressure in emptying aperture can
Reach very high values, in making metal, create the internal stress causing hydrogen embrittlement；
(2) metal storage period in acid solution is long, and under acid solution effect, surface gradually becomes the phenomenon of coarse pitted skin
Being referred to as overpickling, its mechanical performance elongation percentage of the raw material of overpickling substantially reduces, draw dial during be easily generated fracture and broken
Broken；
(3) putting or pickling time deficiency due to raw material wire rod, causes material surface partial oxidation iron sheet not clear up
Totally, being referred to as owing pickling, the iron scale owing not clear up in pickling is during cold group, and iron scale hardness is relatively big, is attached to former
Material surface raw material enters in wire poking module, causes the surface defects such as road plan, also can make to draw the power of dialling to increase simultaneously, make mould grind
Damage aggravation；
(4) waste of water, steel after overpickling, hang in the acid solution that cleaning material surface in service sink is attached, raw material
After hanging out in service sink, it is carried out by water under high pressure again, and in whole water-washing process, the waste to water is bigger；
(5) after pickling, spent acid processes and the cleanout fluid impact on environment, and spent acid processes the neutralization in namely technique, and it is main
If being put in neutralization pond by spent acid, then adding solid caustic soda to neutralization pond, allowing spent acid and Caustic soda that chemistry reflection occurs, generating water
And hydrogen, but spent acid there is also a large amount of ferrous sulfate can not normal reaction, cleanout fluid also has the existence of a large amount of acid simultaneously, dense
Degree is little, is eventually adding in Caustic soda and reflect, although but liquid after neutralization reaches discharge standard, but such industry water gives off
After going, will also result in soil compaction, ferrous sulfate is discharged the most simultaneously, certainly will thus affect crop growth, and pickling
Possibly together with substantial amounts of heavy metal ion in waste water in journey, it exceed standard and the pollution to water body that causes, biology is poisoned, or even
Finally the injury to human health is all self-evident；
(6) in acid cleaning process, acid is to equipment, the harm of people, and in acid cleaning process, acid pond gives out substantial amounts of acid mist, the most just
It it is so-called acid gas.On the one hand acid mist is by the volatilization of acid；On the other hand it is that in pickling, metallic iron reflects with acid, generates big
Amount hydrogen, hydrogen escapes from acid pond, is formed with acid solution together with microgranule water droplet and is brought out, forms acid mist, due to acid in air
The existence of mist, makes house in workshop, equipment suffer erosion and premature breakdown, and in workshop, overhead traveling crane is owing to being corroded by acid mist, typically makes
Can not use with 5-6, have an effect on workman healthy simultaneously；
(7) due to raw material produced hydrogen embrittlement, overpickling, deficient pickling after pickling, to rear operation antirust treatment requirement
Higher, raw material is in saponification process, and the requirement of saponification liquor is first by required soap and animal oil, and quick lime three mixes
Close uniformly, and after certain time ferments, place into service sink, add suitable quantity of water, owing to adding animal oil in preparation
And soap, saponification liquor must be heated with boiler by raw material in saponification, makes animal oil and soap melted by heat.
Summary of the invention
In order to overcome the disadvantages mentioned above of prior art, the invention provides at a kind of securing member raw material scale on surface
Science and engineering skill, can fundamentally solve environmental pollution caused by securing member raw material scale on surface acid cleaning process, to equipment,
The harm of people, is optimized improvement to scale on surface acid cleaning process, uses raw material by formula ball blast, and ball blast sprays
Drenching surface coating lubricating layer, through series of process optimization, product quality, environment get a promotion, and equipment, workers ' health are able to
Ensure.
The technical solution adopted for the present invention to solve the technical problems is: at a kind of securing member raw material scale on surface
Science and engineering skill, comprises the steps:
Step one, employing carry out ball blast by formula shot-blasting machine to securing member raw material surface and remove iron scale；
Step 2, the securing member raw material surface through Shot Blasting is sprayed；
Step 3, in saponification pond, the securing member materials statement topcoating after spray is applied lubricating layer:
Supersaturation fatty acid, Calx, clear water are put in saponification pond according to 2:1:10:600 and stirs, be configured to saponification
Liquid.
Compared with prior art, the positive effect of the present invention is:
Through the process technique of the present invention, steel surface impeller blasting quality can reach what International Organization for Standardization was issued
Sa2.5 standard in ISO8501-1 standard, i.e. the most thoroughly clear up level: do not use magnifier to observe, on the surface after cleaning not
There is oils and fats and booty, the most there is not oxide skin, rust, old paint and impurity.Not being eliminated impurity thoroughly is with faintly visible
Lamellar or strip exist.Raw-material mechanical performance index will not be caused any harmful effect by present treatment technique simultaneously, makes
Obtaining product quality effectively to be promoted, environment has obtained effective change.Owing to not having acid mist, Devices in Workshop to make in workshop
Obtain the growth of several times with the life-span, workman is healthy to be guaranteed；Simultaneously because boiler heating and spent acid neutralize eliminate,
Greatly reduce production cost.
Detailed description of the invention
A kind of securing member raw material scale on surface processes technique, comprises the steps:
Step one, use and by formula shot-blasting machine, securing member raw material surface carried out ball blast and remove iron scale:
The present invention is directed to the harm in the acid cleaning process of existing technique and deficiency, for more preferable Environment control, protect workman
Healthy, improve steel surface iron scale cleaning quality, in conjunction with steel practical situation, will be referred to tightly by formula shot-blasting machine
In firmware raw material surface deoxygenation iron sheet, it is that shot is thrown to steel by the impeller utilizing high speed rotating that ball blast removes iron scale
Surface reaches the purpose except iron scale.
During ball blast, it is necessary to the determination carrying out following parameter works:
One, shot diameter used by ball blast is selected
During raw material surface roughness value directly affects cold group of finishing operations, raw material draws group rear surface presentation quality
And the service life of wire poking module；Due to medium carbon steel, low-alloy steel mechanical performance in yield strength relatively mild steel high, elongation percentage
Low compared with mild steel, if the choosing of shot granularity is excessive, necessarily hit by big face large impact power at ball blast Central Plains material surface, from
And make material surface form processing hardening, and cause raw material yield strength relatively mild steel to increase, elongation percentage relatively mild steel reduces, with
Time shot excessive, ball blast also will make materials statement surface roughness reduce, draw dial during all can cause raw material be pulled off and
Shorten the service life of wire poking module, if shot undersized, although raw material surface obtains higher roughness, but due to former
Material its rigidity is higher, and the service life of shot is short；Reduction and shot in order to ensure the roughness value after raw material ball blast
Adequate service life the shot of 0.5-0.75mm diameter typically should be used to be advisable；If raw material is mild steel, can be selected for
The shot of 1.2-2mm diameter is advisable.
Two, the determination of shot ball blast per minute amount during ball blast
For medium carbon steel, low-alloy steel, surface Sa2.5 to be reached standard, each ramming head ball blast per minute amount is according to standard
Every 1KW10-15Kg.Owing to using by formula shot-blasting machine, raw material be piecemeal by carrying out Shot Blasting, be all round
Steel, raw material surface is little, and the utilization rate of shot can only achieve 25-40%, so selecting the upper limit 40% to be advisable.
Three, the determination of raw material feeding speed during ball blast
Using by formula shot-blasting machine, ramming head is three ramming heads, is by raw material round steel one pieces ball blast in shot-blasting machine,
From raw material feeds ball blast raw material discharging, whole equipment uses PLC to control, and raw material is each during whole ball blast
All ensure that a seriality between part, and out unload to raw material at feeding process, raw material all moves in not stall, to ensure
Each surface of material can be cleared up.For ensureing that raw material Surface Machining can reach Sa2.5 standard, also need to control raw material and enter
To speed, working as excessive velocities, the iron scale cleaning on raw material surface is not clean, and surface also residual oxidization iron sheet does not reaches
Sa2.5 requirement；And when speed is the slowest, the bump of material surface is hit by shot, raw material Surface Machining must be caused to harden,
Both of which by under the influence of raw-material the drawing of the cold sequence of exchanging work in road dial quality and the service life of wire poking module, in conjunction with ball blast amount per minute and
Raw material diameter, raw material diameter, at 20-25mm, sets selected raw material feeding speed speed per minute at PLC program
Being 32 meters to be advisable, raw material diameter, at 26-35mm, sets selected raw material speed per minute at PLC program and is advisable as 30 meters.With
Time due to raw material diameter bigger, its reason of conduct oneself with dignity, and the coefficient of friction increase of drawing-inroller, so its feed speed the most relatively diameter
Little is fast, and the feeding speed that diameter group that in above two factors i.e. PLC, diameter is little is big sets big reason.
Step 2, on discharging material guide mechanism, securing member raw material surface is sprayed:
Raw material is after ball blast, and its surface must produce processing hardening and occur uneven, for not affecting cold exchanging work
Quality is dialled in drawing of sequence material, it is necessary to rationally solves produced problem in ball blast, and makes full use of the uneven of material surface.First
First raw material after ball blast on discharging material guide mechanism, utilize the waste heat after material ball blast, increase and together material surface is sprayed
Drenching operation, the raw material after ball blast is at high temperature through spray, and surface quickly generates the rust powder of a layer the thinnest, rust powder
Produce and reduce the raw material coefficient of friction at cold group of process in which materials Yu wire poking module, due to the coefficient of friction of material Yu wire poking module
It is effectively improved.
Hardening through ball blast rear surface for solving raw material, raw material is former after ball blast all to be used to whole heap material trickle, by
Mutually pile up in material, cannot pour on following most raw material surface；For ensureing that every raw material surface can uniformly be drenched
Water, devises a spray water tank at shot-blasting machine discharging opening, and waterbox design, for respectively to open a mouth, is passed through for raw material,
It is designed with in water tank under nozzle, water tank and is designed with return pipe, for not wasting water, be also devised with a water storage tank, water container backwater pipe
Being connected with water storage tank with water pipe, the water after pouring reclaims in water tank and comes back to water storage tank, Reusability, design peace on water storage tank
Equipped with water pump, it is connected with nozzle with water pipe, thus forms a spray loop closed.
Step 3, securing member materials statement topcoating is applied lubricating layer:
Raw material after ball blast applies lubricating layer on next procedure surface, needed for practice finds that saponification liquor is in preparation
Animal oil and soap all can eliminate, utilize the characteristic that supersaturation fatty acid, sodium hydroxide are soluble in water, with supersaturation fat
Acid, sodium hydroxide substitute animal oil and soap, when preparing saponification liquor, only need to by supersaturation fatty acid, sodium hydroxide according to than
Example is directly placed into saponification pond, and adds required Calx in proportion, stirs, in process for preparation, and supersaturation fatty acid, hydrogen-oxygen
Change sodium, Calx, clear water quality are prepared in strict accordance with 2:1:10:600；According to the saponification liquor of aforementioned proportion preparation, through saponification
Just go out the steel surface in pond, had Calx and supersaturation fatty acid, sodium hydroxide solution that chemical reaction fully occurs, generate fatty acid
Sodium salt and fatty acid calcium salt coating, touching with the sensation of viscous hands, fatty acid sodium salt and fatty acid calcium salt with hands is a kind of good profit
Slip, the processing technology of soap uses supersaturation fatty acid and sodium hydroxide to react post-heating exactly and forms, and the one-tenth of animal oil
Part it is exactly fatty acid, utilizes the characteristic that supersaturation fatty acid and sodium hydroxide are soluble in water, so with supersaturation fatty acid and hydrogen
Sodium oxide directly eliminates animal oil and soap；Just because of the eliminating of animal oil and soap, material is at coating lubricating layer saponifying process
On be not required to saponification liquor is heated, thus eliminated boiler, in room temperature state the most directly by after ball blast gets rusty in production
Material hangs in saponification pond and carries out saponification, serves the effect reducing aided process, has accomplished low-carbon environment-friendly production, simultaneously because mistake
Satisfied fatty acid, sodium hydroxide have extraordinary lubricity, are substantially soluble in again water, supersaturation fatty acid, sodium hydroxide, stone
After ash, clear water fully react, forming brand-name grease and stick to steel surface, steel are after drawing and dialling, and surface preserves
Preferably grease, serves good lubrication for lower road contracting bar, decreases the damage of contracting bar mould, reduce cost, former
To heat liquid with due to boiler, steel and saponification liquor are all hot, and steel surface coating lubricating layer moisture content quickly volatilizees, by
In having eliminated boiler, steel and saponification liquor are all room temperature, and steel, after saponification, are put out by steel in time, thus are beneficial to
Steel surface coating lubricating layer moisture content volatilization.
Claims (6)
1. a securing member raw material scale on surface processes technique, it is characterised in that: comprise the steps:
Step one, employing carry out ball blast by formula shot-blasting machine to securing member raw material surface and remove iron scale；
Step 2, the securing member raw material surface through Shot Blasting is sprayed；
Step 3, in saponification pond, the securing member materials statement topcoating after spray is applied lubricating layer:
Supersaturation fatty acid, sodium hydroxide, Calx, clear water are put in saponification pond according to 2:1:10:600 and stirs, preparation
Becoming saponification liquor, supersaturation fatty acid, sodium hydroxide are soluble in water.
Securing member raw material scale on surface the most according to claim 1 processes technique, it is characterised in that: in step one
During described ball blast, if raw material is medium carbon steel or low-alloy steel, then use the shot of 0.5-0.75mm diameter；If it is former
Material is mild steel, then use the shot of 1.2-2mm diameter.
Securing member raw material scale on surface the most according to claim 1 processes technique, it is characterised in that: in step one
During described ball blast, it is 10-15Kg/1KW by each ramming head of formula shot-blasting machine ball blast per minute amount.
Securing member raw material scale on surface the most according to claim 1 processes technique, it is characterised in that: in step one
During described ball blast, if a diameter of 20-25mm of raw material, then feeding speed is 32 meters per minute；If raw material diameter
For 26-35mm, then feeding speed is 30 meters per minute.
Securing member raw material scale on surface the most according to claim 1 processes technique, it is characterised in that: step 2 institute
The spray process stated completes in spray water tank, and described spray water tank is arranged on by formula shot-blasting machine discharge outlet.
Securing member raw material scale on surface the most according to claim 5 processes technique, it is characterised in that: described spray
Respectively open a mouth before and after water tank, pass through for raw material, tank top is provided with nozzle, water tank bottom is provided with return pipe
Being connected with water storage tank, be provided with water pump on water storage tank, described water pump is connected with nozzle by water pipe, thus forms a closing
Spray loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610909529.4A CN106312829B (en) | 2016-10-19 | 2016-10-19 | Fastener raw material scale on surface treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610909529.4A CN106312829B (en) | 2016-10-19 | 2016-10-19 | Fastener raw material scale on surface treatment process |
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| CN106312829A true CN106312829A (en) | 2017-01-11 |
| CN106312829B CN106312829B (en) | 2019-03-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695117A (en) * | 2017-11-09 | 2018-02-16 | 中铁隆昌铁路器材有限公司 | A kind of saponification process technique for bolt class product |
| CN110328270A (en) * | 2019-05-31 | 2019-10-15 | 南通海洲紧固件制造有限公司 | Bolt blank undergauge treatment process |
| CN111958494A (en) * | 2020-08-21 | 2020-11-20 | 无锡银臻材料科技有限公司 | Production process of surface oxide of base material for composite board |
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| US8728244B2 (en) * | 2005-03-17 | 2014-05-20 | Sms Siemag Aktiengesellschaft | Method and device for descaling a metal strip |
| CN101172327A (en) * | 2007-11-23 | 2008-05-07 | 阚柳凤 | Anchor clipper through hole type workblank cold pressing technique |
| CN102107227A (en) * | 2010-12-10 | 2011-06-29 | 玉环普天单向器有限公司 | Method for manufacturing internal gear of speed-reducing starter |
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| CN107695117A (en) * | 2017-11-09 | 2018-02-16 | 中铁隆昌铁路器材有限公司 | A kind of saponification process technique for bolt class product |
| CN110328270A (en) * | 2019-05-31 | 2019-10-15 | 南通海洲紧固件制造有限公司 | Bolt blank undergauge treatment process |
| CN111958494A (en) * | 2020-08-21 | 2020-11-20 | 无锡银臻材料科技有限公司 | Production process of surface oxide of base material for composite board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106312829B (en) | 2019-03-22 |
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