CN108251782A - A kind of sugar mill shaft element electric arc spraying repair novel construction skill - Google Patents
A kind of sugar mill shaft element electric arc spraying repair novel construction skill Download PDFInfo
- Publication number
- CN108251782A CN108251782A CN201711497525.0A CN201711497525A CN108251782A CN 108251782 A CN108251782 A CN 108251782A CN 201711497525 A CN201711497525 A CN 201711497525A CN 108251782 A CN108251782 A CN 108251782A
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- matrix
- turning
- electric arc
- spraying
- novel construction
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of sugar mill shaft element electric arc spraying repair novel construction skills, include the following steps：(1) it is surface-treated：Due to the limitation of workshop place and practical condition, we are by three master operations of surface treatment：Surface clean → surface preparation → surface roughening is improved to that progress turning on lathe is directly being wanted to machine；(2) it selects and is sprayed in advance with the higher spraying wire of substrate combinating strength, as prime coat, to increase sprayed coating and substrate combinating strength.The present invention reduces this techniques of sandblasting, without the pollution sources such as dust, splashing and insecurity, decrease the investment in terms of plant and equipment；And surface treatment, preprocessing, surface roughening are concentrated on lathe and carried out, the clear flow of transfer of workpiece can be reduced, reduces process costs.Meanwhile spraying bottoming silk this process is increased in spraying process, the bond strength of sprayed coating and matrix is enhanced, makes repaired workpiece more durable.
Description
Technical field
The present invention relates to spraying technology field, more particularly to a kind of sugar mill shaft element electric arc spraying repair novel construction
Skill.
Background technology
Arc spraying technology can application apparatus maintenance maintenance, sugar refinery sugarcane material can be torn solution, conveying, squeezing, except Sui, purging
Etc. the key components and parts surface positions easy to wear such as roll shaft neck, gear-box axle, shredding machine axis squeezed in critical processes repaired again
Manufacture makes accessory size and surface quality reach former part level, it is ensured that the performance of equipment reduces energy consumption and production cost.It is former
The spraying process come is mainly to spray the technique based on the corrosion-inhibiting coatings such as zinc-aluminium, thus the spraying process to machine components is also
Improvement develops, and main processes are as follows：
First, surface preparation：Surface preparation in electric arc spraying process is a very important job, including surface
Cleaning, surface preparation, surface roughening etc., specially：1) main purpose of surface clean is to remove surface to be sprayed
Oil, decontamination, derusting etc..Common surface treatment method carries out table as plating, zinc-plated, galvanizing etc. with the method for pickling
Face is cleaned.Sandblasting mode can remove greasy dirt, corrosion, the oxide layer on surface to be sprayed etc., and surface to be sprayed can also be made thick
Roughening, so, it is the best way to carry out surface clean currently with the method for sandblasting.It can be said that sandblasting can be suitble to almost
All modes be surface-treated before pretreatment work.2) surface preparation is must to carry out pre-add to workpiece surface before reparation
Work, that is, workpiece surface abrading section vehicle (being suitable for axis class) or milling, the mode of plane (being suitable for plane) processed flat
It is whole, then through surface roughening treatment, metal needed in spraying.Surface preparation amount is depending on coating layer thickness.It should spy during preprocessing
Not Zhu Yi corner transition, sprayed coating edge, particularly sharp edge, it is possible to peel off sprayed coating, so edge should be processed into
Larger fillet or chamfering.3) surface roughening is either for anticorrosion engineering or machinery part surface reparation, electric arc spray
Surface to be sprayed is exactly roughened by most important process before painting.Surface roughening treatment is typically with sandblasting side
Method.At present, blasting treatment is not only the best method of surface clean and the best method of surface roughening treatment.The material of sandblasting
Material (also referred to as abrasive material) is selected and can be determined according to the size, shape and hardness of workpiece.Electricity is carried out preferably in 4 hours after having sprayed sand
Arc sprays.
2nd, Coating quality control：1) the coating consistency of coating consistency electric arc spraying is by molten metal particle size
It determines.Then coating surface is coarse greatly for metallic, and consistency is bad；The small then coating surface of metallic is fine and closely woven, good compactness.Shadow
The factor for ringing coating consistency is mainly the pressure and flow of compressed air, while also related with the shape of spray tip.Electric arc
The pressure of compressed air is generally 0.5~0.7Mpa during spraying, and air mass flow is 1.6~2.0M3/ minutes.2) coating and matrix
Bond strength arc spraying coating and matrix bond strength depend on following factors：
The pressure of compressed air
The flow of compressed air
The pretreatment degree on surface to be sprayed
Spray gun relative to workpiece surface distance
The wire feed rate of electric arc spraying equipment, that is, the size of electric current
Arc voltage
Improving the pressure of compressed air can make metallic increase impact force, increase at metallic striking work surface
Aximal deformation value, so as to improve anchoring strength of coating.The combination that coating can equally be increased in the flow for improving compressed air is strong
Degree.Since the main reason for surface preparation is the important link of electric arc spraying work, and anchoring strength of coating is not high is exactly surface
Pretreating effect is bad.Secondary pollution is caused in placement or carrying, processed surface is made to be stained with greasy dirt, aqueous vapor, powder again
Dirt etc., when electric arc spraying, still fall within unqualified surface.The combination that spray gun can influence coating relative to the distance of workpiece surface is strong
Degree.Arc pistol should be 150~200mm relative to the distance of workpiece surface.Operating current and voltage during electric arc spraying is to applying
The bond strength of layer can also have an impact.Electric current during electric arc spraying is determined according to the material and coating needs of metal wire material
And voltage.3) coating hardness：In arc spray process, the raising of coating hardness is when being attached to workpiece surface by metallic
Compressed air is quickly cooled down it and metal structure is made to change to determine.In general, the factor of coating hardness is influenced
There is the following aspects：
The chemical composition of metal wire material
Spray gun relative to workpiece surface distance
The pressure of compressed air, flow
Spray voltage, electric current
Influence of the chemical composition of metal wire material to coating hardness is very big.Metal wire material hardness is higher, and coating hardness also can
It is higher.
3rd, electric arc spraying standard parameter：The important technological parameters of electric arc spraying are operating voltage and electric current, are additionally included
Relative distance of the pressure and flow of compressed air, spray gun and workpiece etc..
One electric arc spraying standard parameter of table
Since the material of metal wire material is different, fusing point, hardness also differ, so will be according to silk material when carrying out electric arc spraying
Material selection operating voltage and electric current.In general, the operating voltage and electricity that hardness and lower melting-point metal wire material use
Stream is relatively low；Operating voltage and electric current used in hardness and higher melting-point metal wire material is also relatively high.
Former technique has the following disadvantages：
When position progress surface repairing need to be repaired to workpiece, using blasting craft.In sandblasting, no matter what is used
Kind abrasive material can all generate dust, fly pollutions and the insecurity such as shallow, therefore cannot carry out blasting treatment in workshop.It will
Carry out sandblasting process, it is necessary to build dedicated sand blasting room, this just needs no small investment.
The bond strength of sprayed coating and matrix：In practical spraying process, the bond strength of sprayed coating itself is enough
Even (thickness to reach required is repeatedly sprayed), and be susceptible to problem is that sprayed coating (is typically with matrix
Carbon steel) material capability is different and so that the bond strength between them is insufficient, and sprayed coating is caused to come off.
From the above process it is recognised that parameters (voltage, electric current, air pressure, air-flow etc.) in spraying process is ensured
And under the reasonable unanimous circumstances of surface treatment, sprayed coating can reach comparatively ideal bond strength with matrix.But different Spray Wire
Its bond strength of material is also different, is varied.And in order to which sprayed coating is allowed to finally reach the mechanical performance of requirement (as firmly
Degree, wearability), it can only select specific spraying wire, and this selected silk material its bond strength with matrix is not necessarily best
's.
Invention content
Consider that workshop place is limited, and has other processes work post being produced, carry out sandblasting in workshop, can generate
Noise etc. is polluted, have larger impact to the production of other processes work post and is hindered.If consider separately build sand blasting room, need place and compared with
Big investment, this does not gear to actual circumstances.Therefore, a set of new process program of design construction, eliminates the spray in surface treatment process
Sand process, changes to have and is surface-treated on existing lathe, eliminates pollution and the influence to other processes work post and hinders.
The specific technical solution that the present invention takes is：
A kind of sugar mill shaft element electric arc spraying repair novel construction skill, includes the following steps：
(1) it is surface-treated：Due to the limitation of workshop place and practical condition, we are main by the three of surface treatment
Process：Surface clean → surface preparation → surface roughening is improved to that progress turning on lathe is directly being wanted to machine, has
Body is：
A, first the greasy dirt sundries of matrix surface that workpiece spindle needs are repaired is burnt up with flame or is directly carried out clearly with acetone
It washes, makes the surface of processing when being processed to prevent lower step dirty；
B, turnery processing is carried out：The processing capacity control of turning is ensuring spray layer thickness no more than 2mm；
C, on matrix to the processing such as angle or tiny position less than place, using angle grinder with coarse sand cloth by hand at
Reason；
(2) select and sprayed in advance with the higher spraying wire of substrate combinating strength, as prime coat, with increase sprayed coating and
Substrate combinating strength.
Preferably, the turnery processing described in step (1) can vehicle increase bonded area into the immature screw thread heart.
Preferably, during turnery processing described in step (1), to make surface roughening, when turning, is not pacified by normal turning
Turning tool height is filled, but turning tool height is suitably reduced compared with normal level, low certain size T's, T is big during than normal turning
Small diameter and material according to matrix is determined.
Preferably, the bottoming layer thickness described in step (2) is in 0.1mm or so, the combination of the spraying wire and matrix
Intensity is in more than 65MPa.
In actually spraying, go wrong it is most be sprayed coating and matrix bond strength it is inadequate, sprayed coating is caused to take off
It falls.Surface treatment and relevant parameter all as in the case of, the bond strength of sprayed coating and matrix just seems most important.This
Invention is first using spraying wire higher with substrate combinating strength spraying as prime coat, so that the knot of sprayed coating and matrix
Conjunction is more secured, there will be no delamination.
Compared with the prior art, the invention has the advantages that：
1st, reduce sandblasting this technique, without the pollution sources such as dust, splashing and insecurity.
2nd, reduce sandblasting this technique, the investment in terms of plant and equipment can be reduced.
3rd, surface treatment, preprocessing, surface roughening are concentrated on lathe and carried out, the clear stream of transfer of workpiece can be reduced
Journey reduces process costs.
4th, spraying bottoming silk this process is increased in spraying process, enhances the bond strength of sprayed coating and matrix,
Make repaired workpiece more durable.
Description of the drawings
Fig. 1 is the Turning Tool Setting Height of normal machining in embodiment；
Fig. 2 is the mounting height for making lathe tool when sprayed surface handles turning in embodiment.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
Embodiment
A kind of sugar mill shaft element electric arc spraying repair novel construction skill, includes the following steps：
(1) it is surface-treated：Due to the limitation of workshop place and practical condition, we are main by the three of surface treatment
Process：Surface clean (sandblasting) → surface preparation → surface roughening (sandblasting) is improved to directly wanting the enterprising driving of lathe
It cuts and machines, specially：
A, first the greasy dirt sundries of matrix surface that workpiece spindle needs are repaired is burnt up with flame or is directly carried out clearly with acetone
It washes, makes the surface of processing when being processed to prevent lower step dirty；
B, turnery processing is carried out：Turnery processing can vehicle increase bonded area, the processing capacity control of turning into the fine thread heart
System is ensuring spray layer thickness no more than 2mm, meanwhile, to make surface roughening, when turning, does not install lathe tool by normal turning
Highly, but turning tool height compared with normal level is suitably reduced, such as Fig. 1, is the Turning Tool Setting Height that processing is cut by normal state.Fig. 2
The mounting height of lathe tool when making sprayed surface processing turning, during than normal turning the size of low certain size T, T according to
The diameter of matrix and material are determined；
C, on matrix to the processing such as angle or tiny position less than place, using angle grinder with coarse sand cloth by hand at
Reason；
(2) it selects and is sprayed in advance with the higher spraying wire of substrate combinating strength, as prime coat, bottoming layer thickness exists
The bond strength of 0.1mm, selected spraying wire and matrix is in 65MPa, to increase sprayed coating and substrate combinating strength.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (4)
1. a kind of sugar mill shaft element electric arc spraying repair novel construction skill, it is characterised in that include the following steps：
(1) it is surface-treated：Due to the limitation of workshop place and practical condition, we are by the three of surface treatment main works
Sequence：Surface clean → surface preparation → surface roughening is improved to that progress turning on lathe is directly being wanted to machine, specifically
For：
A, first the greasy dirt sundries of matrix surface that workpiece spindle needs are repaired is burnt up with flame or is directly cleaned with acetone, with
Make the surface of processing during anti-lower step processing dirty；
B, turnery processing is carried out：The processing capacity control of turning is ensuring spray layer thickness no more than 2mm；
C, on matrix to the processing such as angle or tiny position less than place, handled by hand with coarse sand cloth using angle grinder；
(2) it selects and is sprayed in advance with the higher spraying wire of substrate combinating strength, as prime coat, to increase sprayed coating and matrix
Bond strength.
2. electric arc spraying repair novel construction skill according to claim 1, it is characterised in that the turnery processing described in step (1) can
Vehicle is into fine thread to increase bonded area.
3. electric arc spraying repair novel construction skill according to claim 1, it is characterised in that the turnery processing described in step (1)
When, to make surface roughening, when turning, does not install turning tool height by normal turning, but turning tool height is fitted compared with normal level
Work as reduction, the size of low certain size T, T are determined according to the diameter and material of matrix during than normal turning.
4. bottoming layer thickness described in step (2) according to claim 1 is in 0.1mm or so, the spraying wire with
The bond strength of matrix is in more than 65MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497525.0A CN108251782A (en) | 2017-12-29 | 2017-12-29 | A kind of sugar mill shaft element electric arc spraying repair novel construction skill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711497525.0A CN108251782A (en) | 2017-12-29 | 2017-12-29 | A kind of sugar mill shaft element electric arc spraying repair novel construction skill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108251782A true CN108251782A (en) | 2018-07-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711497525.0A Pending CN108251782A (en) | 2017-12-29 | 2017-12-29 | A kind of sugar mill shaft element electric arc spraying repair novel construction skill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981301A (en) * | 2021-02-08 | 2021-06-18 | 上海离原环境科技有限公司 | Preparation method of threaded element for double-screw extruder |
| CN113134466A (en) * | 2021-04-23 | 2021-07-20 | 潍坊远大金属表面科技股份有限公司 | Hot galvanizing coating based renewing method |
| CN117904572A (en) * | 2024-01-15 | 2024-04-19 | 东北大学 | Method for improving wear resistance of hydrophobic coating through turning treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575693A (en) * | 2009-06-18 | 2009-11-11 | 河南理工大学 | Method for spraying and preparing high temperature sulfidation resistant alloy layer on the surface of cast iron |
| CN105177489A (en) * | 2015-06-05 | 2015-12-23 | 科盾工业设备制造（天津）有限公司 | Method for enhancing corrosion and wear resistance of metal member surface |
-
2017
- 2017-12-29 CN CN201711497525.0A patent/CN108251782A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575693A (en) * | 2009-06-18 | 2009-11-11 | 河南理工大学 | Method for spraying and preparing high temperature sulfidation resistant alloy layer on the surface of cast iron |
| CN105177489A (en) * | 2015-06-05 | 2015-12-23 | 科盾工业设备制造（天津）有限公司 | Method for enhancing corrosion and wear resistance of metal member surface |
Non-Patent Citations (4)
| Title |
|---|
| 冯锦春等: "《机电设备维修第2版》", 31 January 2015, 机械工业出版社 * |
| 刘新平等: "《数控车削编程与加工》", 31 January 2017, 北京理工大学出版社 * |
| 吴国兴: "《金工实习》", 31 August 2014, 华中科技大学出版社 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981301A (en) * | 2021-02-08 | 2021-06-18 | 上海离原环境科技有限公司 | Preparation method of threaded element for double-screw extruder |
| CN113134466A (en) * | 2021-04-23 | 2021-07-20 | 潍坊远大金属表面科技股份有限公司 | Hot galvanizing coating based renewing method |
| CN117904572A (en) * | 2024-01-15 | 2024-04-19 | 东北大学 | Method for improving wear resistance of hydrophobic coating through turning treatment |
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Application publication date: 20180706 |