CN109267060A - A kind of restorative procedure after roughing mill main shaft flat head sleeve abrasion - Google Patents
A kind of restorative procedure after roughing mill main shaft flat head sleeve abrasion Download PDFInfo
- Publication number
- CN109267060A CN109267060A CN201811135002.6A CN201811135002A CN109267060A CN 109267060 A CN109267060 A CN 109267060A CN 201811135002 A CN201811135002 A CN 201811135002A CN 109267060 A CN109267060 A CN 109267060A
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- China
- Prior art keywords
- main shaft
- flat head
- head sleeve
- roughing mill
- mill main
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
Abstract
The present invention relates to the restorative procedures after a kind of abrasion of roughing mill main shaft flat head sleeve, include the following steps: S1: determining the damage location and abrasion loss of roughing mill main shaft flat head sleeve；S2: metallographic detection is carried out to roughing mill main shaft flat head sleeve；S3: the fatigue layer of cleaning roughing mill main shaft flat head sleeve damage location exposes fresh metal face；S4: the chemical component of analysis roughing mill main shaft flat head sleeve determines the alloy powder of reparation based on the analysis results；S5: roughing mill main shaft flat head sleeve is preheated；S6: adjusting the running parameter of laser, opens the laser beam that laser issues high-energy density, by the consolidation together with roughing mill main shaft flat head sleeve base material surface of the alloy powder of reparation, forms cladding layer in damage location；S7: isothermal holding.This method repair the cladding layer hardness to be formed higher than base material, crystal grain is tiny and dense structure, have good resistance to pitting and thermal stability, with base material binding force by force, be not easy chip off-falling and fall off, wearability it is good, requirement can be fully met after reparation.
Description
Technical field
Reparation the present invention relates to roughing mill plant maintenance technical field, after especially a kind of roughing mill main shaft flat head sleeve abrasion
Method.
Background technique
Universal shaft type of attachment is used using roughing mill in steel industry, crossed universal shaft has large carrying capacity, uses
Service life length, transmission efficiency superelevation, axis inclination angle are big, the advantages that running smoothly, is easy to maintain.But in use due to hold
The effects of being hit, vibrating, flat head sleeve is easy to be crushed, wear, or even is broken.Roughing mill main shaft both domestic and external is flat
Headgear mostly uses greatly the materials such as middle carbon CrMo steel integrally to manufacture, and then reaches 45-50HRC by processing means such as surface carburizations
Hardness requirement, thus roughing mill main shaft flat head sleeve manufacturing cost is very high, again difficult due to repairing after wear-out failure, i.e.,
Just also it is difficult to meet requirement using conventional method reparation, scraps place so generally all doing to the flat head sleeve after abrasion at present
Reason, so then causes very big waste.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides the reparation side after a kind of roughing mill main shaft flat head sleeve abrasion
Method, the restorative procedure use laser cladding, repair to the roughing mill main shaft flat head sleeve after abrasion, make the roughing mill repaired
The good and of the invention restorative procedure of main shaft flat head sleeve wearability has few repair layer crackle, cladding layer and (roughing mill main shaft homalocephalus
Set) the high advantage of base material fusion rate.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
Restorative procedure after a kind of abrasion of roughing mill main shaft flat head sleeve, using laser cladding to the roughing mill main shaft after abrasion
Flat head sleeve is repaired, and described method includes following steps:
S1: the damage location and abrasion loss of roughing mill main shaft flat head sleeve are determined；
S2: metallographic detection is carried out to roughing mill main shaft flat head sleeve；
S3: the fatigue layer of cleaning roughing mill main shaft flat head sleeve damage location, until exposing fresh metal face；
S4: the chemical component of analysis roughing mill main shaft flat head sleeve determines the alloy powder of reparation, by alloy based on the analysis results
The feed appliance of powder loading laser；
S5: roughing mill main shaft flat head sleeve is preheated；
S6: adjusting the running parameter of laser, the laser beam that laser issues high-energy density is opened, by the alloy of reparation
Powder consolidation together with roughing mill main shaft flat head sleeve base material surface forms cladding in the damage location of roughing mill main shaft flat head sleeve
Layer；
S7: isothermal holding, 150-200 DEG C of heat preservation, heat preservation 6-8h.
Preferably, in step S1, by being cleaned to roughing mill main shaft flat head sleeve and accurately being surveyed to surface size
Amount, to determine damage location and abrasion loss.Wherein, after cleaning, further to the dust of roughing mill main shaft flat head sleeve, scale,
Corrosion is cleared up.
Preferably, in step S3, clear up roughing mill main shaft flat head sleeve damage location fatigue layer with a thickness of 0.5-1mm.
Preferably, in step S4, the alloy powder of the reparation include 5wt%Cu, 3.5wt% Si, 1.5wt%B,
27.0wt%Cr, 60wt%Ni and 3wt%Fe；Alternatively, the alloy powder of the reparation include 5wt%Cu, 3.5wt% Si,
1.5wt%B, 27.0wt%Cr, 58wt%Ni, 3wt%Fe and 2 wt% other elements.
Preferably, in step S5, roughing mill main shaft flat head sleeve is carried out to be preheated to 150-200 DEG C, preferably 180 DEG C.In advance
Hot base material enables cladding layer to fuse as much as possible with base material and is integrated, and prevents cladding layer and base material surface generation reheating after cladding
Crackle.
Preferably, in step S6, the running parameter of laser is adjusted, the running parameter of the laser includes power, light
Spot diameter, overlapping rate and scanning speed.Preferably, the power for adjusting laser is 1kw, spot diameter 2mm, overlapping rate 20-
40%, scanning speed 16-18mm/s.
And according to knowhow, when spot diameter is 2mm, cladding effect is best, and remainder data can be according to the fixation of laser
Value.Preferably, the power for adjusting laser is 1kw, overlapping rate 40%, scanning speed 16mm/s.
Preferably, the holding temperature of step S7 is 180 DEG C, and soaking time is 6h or 7h.Isothermal holding, after cladding being improved
Residual stress after roughing mill main shaft flat head sleeve metallographic structure performance and elimination cladding.And for roughing mill main shaft flat head sleeve,
Material only just can make its structure property reach optimum state in this temperature range.
It preferably, further include machining processes step S67 between step S6-S7: to welding roughing mill main shaft homalocephalus
The reparation position of set is machined, and is allowed to return back to initial design parameter.
Preferably, after step s 7, further include repairing effect detecting step: surface is repaired to roughing mill main shaft flat head sleeve
Dye penetrant inspection and ultrasonic examination are carried out, to assess repairing effect.
Preferably, after step s 7, further include hardness determination step: to the reparation position of roughing mill main shaft flat head sleeve into
Row hardness determination, and be compared with roughing mill main shaft flat head sleeve base material hardness, to assess repairing effect.
(3) beneficial effect
The beneficial effects of the present invention are:
Compared with prior art, restorative procedure of the invention by being analyzed roughing mill main shaft flat head sleeve, (is examined first by metallographic
Survey and chemical composition analysis), determine the alloy powder of laser melting coating reparation, and adjust the running parameter of laser accordingly, then benefit
The reparation to roughing mill main shaft flat head sleeve is completed with laser melting and coating technique.Roughing mill main shaft flat head sleeve after reparation, cladding layer
Hardness be higher than base material 45HRC itself, and microstructure of surface cladding layer is fine and close, and crystal grain is tiny, has good resistance to pitting and thermostabilization
Property, intensity is high, cladding layer and base material binding force are strong, is not easy chip off-falling and falls off, wearability is good, and high temperature modification amount is small, in use
Phenomena such as chip off-falling will not be generated and fallen off, long service life.It is installed after reparation to carrying out actual production on roughing mill and make
With verifying it and fully meet former requirement.
Detailed description of the invention
Fig. 1 is the flow chart of the restorative procedure after a kind of roughing mill main shaft flat head sleeve abrasion of the present invention.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Shown in Figure 1, the restorative procedure after a kind of roughing mill main shaft flat head sleeve abrasion of the invention includes four big substantially
Part, that is, detection and recruitment evaluation after keeping the temperature and repair after preparation, laser melting coating reparation, reparation before repairing, and specifically repair
Steps are as follows:
First part: prepare before repairing
(1) roughing mill main shaft flat head sleeve is cleaned, the dust, scale, corrosion of roughing mill main shaft flat head sleeve are cleaned, detection is repaired
Multiple spot size, determines damage location and its abrasion loss；
(2) metallographic detection is carried out to roughing mill main shaft flat head sleeve workpiece, failure analysis and longevity is carried out to workpiece using metallographic detection
Life assessment；
(3) roughing mill main shaft flat head sleeve damage location (i.e. abrading section) fatigue layer 1mm is removed using boring and milling machine, fatigue layer is clear
Reason is clean to there is fresh metal machined surface；
(4) hardness and chemical component for detecting roughing mill main shaft flat head sleeve, thereby determine that the alloy powder of reparation, in conjunction with damage
Position and abrasion loss calculate the alloy powder demand of reparation, and according to the demand floating certain proportion of calculating, obtain reality
Border alloy powder dosage, is loaded into the feed appliance being used cooperatively with laser；
Under normal circumstances, repair roughing mill main shaft flat head sleeve the alloy powder used include 5wt%Cu, 3.5wt% Si,
1.5wt%B, 27.0wt%Cr, 60wt%Ni and 3wt%Fe；Or include 5wt%Cu, 3.5wt% Si, 1.5wt%B, 27.0wt%
Cr, 58wt%Ni, 3wt%Fe and 2 wt% other elements.
(5) the pre-heat treatment is carried out to roughing mill main shaft flat head sleeve, preheating temperature is 150-200 DEG C.
Second part: repair process
(1) according to metallographic detection, hardness and the chemical component testing result in first part, the running parameter of laser is adjusted:
For example, the power for adjusting laser is 1kw, spot diameter 2mm, overlapping rate 40%, scanning speed 18mm/s.
(2) laser is opened, the laser beam of high-energy density is issued, by the alloy powder of feed appliance output and roughing owner
The surface thin layer of axis flat head sleeve base material is melted together and is quickly solidified, and alloy powder is by cladding in roughing mill main shaft flat head sleeve
Surface (at the fresh metal machined surface that step (3) is formed specifically in first part), cladding layer thickness is about 0.5mm-
1.2mm。
Part III: the isothermal holding after reparation
According to roughing mill main shaft flat head sleeve original design parameter, it is machined to position is repaired, with boring and milling machine or polishing side
Method removes the extra some materials of cladding layer, welds roughing mill main shaft flat head sleeve, carries out after the completion to roughing mill main shaft flat head sleeve
Isothermal holding, temperature are 150-200 DEG C, preferably 180 DEG C, keep the temperature 6-8h, are then cooled to room temperature.
Part IV: the testing and evaluation after reparation
(1) surface dye penetrant inspection is carried out to the roughing mill main shaft flat head sleeve after processing and integral ultrasonic is detected a flaw, effect is repaired in assessment
Fruit；
(2) hardness determination is carried out to the roughing mill main shaft flat head sleeve after reparation, the roughness for repairing portion faces is detected,
It is compared with original new roughing mill main shaft flat head sleeve relevant parameter,
Assess repairing effect.
Application Example
A kind of roughing mill main shaft flat head sleeve cavitation of certain steel plant, abrasion laser cladding method, referring to following procedure carry out:
Preprosthetic preparation: cleaning the roughing mill main shaft flat head sleeve to be repaired, dried, then detect each spot size,
Determine damage location and its abrasion loss；Metallographic detection is carried out to roughing mill main shaft flat head sleeve, carries out failure analysis and service life whereby
Assessment；Using boring and milling machine by the fatigue layer removal 1mm of damage location until exposing new machined surface；Detect the material of base material and hard
Degree determines that material is 43CrMo, hardness 45HRC.
It repairs: iron nickel base alloy powder being selected to be used as reparation alloy powder, it includes: comprising 5wt%Cu, 3.5wt%
Si, 1.5wt%B, 27.0wt%Cr, 58wt%Ni, 3wt%Fe and 2 wt% other elements (microelements such as manganese, copper, niobium), by this
A little powder mixing are packed into the feed appliance of laser cladding equipment.The power for adjusting laser is 1kw, spot diameter 2mm, overlap joint
Rate 40%, scanning speed 18mm/s.Laser is opened, it is flat that the alloy powder fusing of feed appliance output is coated in roughing mill main shaft
The base material surface fusion of the damage location of headgear, alloy powder and roughing mill main shaft flat head sleeve is integrated, and forming a layer thickness is
0.5mm cladding layer.
It repairs post-processing: roughing mill main shaft flat head sleeve is subjected to isothermal holding, treatment process are as follows: 180 DEG C of heat preservation, heat preservation
7h is then cooled to room temperature, original according to the roughing mill main shaft flat head sleeve
Design drawing is machined roughing mill main shaft flat head sleeve, such as boring and milling, polishing.
Repairing effect detection: carrying out dye penetrant inspection and ultrasonic examination to the roughing mill main shaft flat head sleeve surface after reparation,
Detection roughing mill main shaft flat head sleeve has zero defect, and carries out hardness determination and Metallographic Analysis to repair surface, examines its repairing quality
It is whether qualified.
Testing result proves:
Roughing mill main shaft flat head sleeve after reparation, the hardness of cladding layer is higher than base material 45HRC itself, and microstructure of surface cladding layer causes
Close, crystal grain is tiny, and with good resistance to pitting and thermal stability, intensity is high, cladding layer and base material binding force are strong, is not easy chip off-falling
With fall off, wearability is good, and high temperature modification amount is small, will not generate chip off-falling in use and phenomena such as fall off.Installed after reparation to
Actual production and use are carried out on roughing mill, are verified it and are fully met former requirement.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. the restorative procedure after a kind of roughing mill main shaft flat head sleeve abrasion, includes the following steps:
S1: the damage location and abrasion loss of roughing mill main shaft flat head sleeve are determined；
S2: metallographic detection is carried out to roughing mill main shaft flat head sleeve；
S3: the fatigue layer of cleaning roughing mill main shaft flat head sleeve damage location, until exposing fresh metal face；
S4: the chemical component of analysis roughing mill main shaft flat head sleeve determines the alloy powder of reparation, by alloy based on the analysis results
The feed appliance of powder loading laser；
S5: roughing mill main shaft flat head sleeve is preheated；
S6: adjusting the running parameter of laser, the laser beam that laser issues high-energy density is opened, by the alloy of reparation
Powder consolidation together with roughing mill main shaft flat head sleeve base material surface forms cladding in the damage location of roughing mill main shaft flat head sleeve
Layer；
S7: isothermal holding, 150-200 DEG C of heat preservation, heat preservation 6-8h.
2. restorative procedure according to claim 1, which is characterized in that in step S1, by roughing mill main shaft flat head sleeve
It is cleaned and precise measurement is carried out to surface size, to determine damage location and abrasion loss.
3. restorative procedure according to claim 1, which is characterized in that in step S3, cleaning roughing mill main shaft flat head sleeve damage
Traumatic part position fatigue layer with a thickness of 0.5-1mm.
4. restorative procedure according to claim 1, which is characterized in that in step S4, the alloy powder packet of the reparation
Containing 5wt%Cu, 3.5wt% Si, 1.5wt%B, 27.0wt%Cr, 60wt%Ni and 3wt%Fe；Alternatively, the alloyed powder of the reparation
End includes 5wt%Cu, 3.5wt% Si, 1.5wt%B, 27.0wt%Cr, 58wt%Ni, 3wt%Fe and 2 wt% other elements.
5. restorative procedure according to claim 1, which is characterized in that in step S5, carried out to roughing mill main shaft flat head sleeve
It is preheated to 150-200 DEG C, preferably 180 DEG C.
6. restorative procedure according to claim 1, which is characterized in that in step S6, adjust the running parameter of laser: function
Rate is 1kw, spot diameter 2mm, overlapping rate 20-40%, scanning speed 16-18mm/s.
7. restorative procedure according to claim 1, which is characterized in that the holding temperature of step S7 is 180 DEG C, soaking time
For 6h or 7h.
8. restorative procedure according to claim 1, which is characterized in that further include at machining between step S6-S7
Reason step S67: being machined the reparation position of welding roughing mill main shaft flat head sleeve, is allowed to return back to initial design ginseng
Number.
9. restorative procedure according to claim 1, which is characterized in that further include repairing effect detection after step s 7
Step: surface is repaired to roughing mill main shaft flat head sleeve and carries out dye penetrant inspection and ultrasonic examination, to assess repairing effect；And/or
After step s 7, further include hardness determination step: hardness determination carried out to the reparation position of roughing mill main shaft flat head sleeve,
And be compared with roughing mill main shaft flat head sleeve base material hardness, to assess repairing effect.
10. a kind of roughing mill main shaft flat head sleeve is according to restorative procedure described in claim 1-9 to the roughing owner after abrasion
Axis flat head sleeve is repaired to obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135002.6A CN109267060B (en) | 2018-09-28 | 2018-09-28 | Method for repairing worn spindle flat head sleeve of roughing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135002.6A CN109267060B (en) | 2018-09-28 | 2018-09-28 | Method for repairing worn spindle flat head sleeve of roughing mill |
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| Publication Number | Publication Date |
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| CN109267060A true CN109267060A (en) | 2019-01-25 |
| CN109267060B CN109267060B (en) | 2021-11-19 |
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| CN201811135002.6A Active CN109267060B (en) | 2018-09-28 | 2018-09-28 | Method for repairing worn spindle flat head sleeve of roughing mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113249723A (en) * | 2021-06-28 | 2021-08-13 | 成都飞机工业（集团）有限责任公司 | CMT arc surface cladding method based on database system |
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| JPS60106691A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Alloy for brazing |
| EP1029629A2 (en) * | 1999-02-17 | 2000-08-23 | EUROMAT Gesellschaft für Werkstofftechnologie und Transfer mbH | Process for applying a protective coating on the surface of workpieces; alloy and solder used therefor |
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2018
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|---|---|---|---|---|
| JPS60106691A (en) * | 1983-11-15 | 1985-06-12 | Hitachi Metals Ltd | Alloy for brazing |
| EP1029629A2 (en) * | 1999-02-17 | 2000-08-23 | EUROMAT Gesellschaft für Werkstofftechnologie und Transfer mbH | Process for applying a protective coating on the surface of workpieces; alloy and solder used therefor |
| JP2009056511A (en) * | 2007-08-31 | 2009-03-19 | General Electric Co <Ge> | Method of repairing nickel-based alloy article |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113249723A (en) * | 2021-06-28 | 2021-08-13 | 成都飞机工业（集团）有限责任公司 | CMT arc surface cladding method based on database system |
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