CN107206443A - The manufacture method of top - Google Patents
The manufacture method of top Download PDFInfo
- Publication number
- CN107206443A CN107206443A CN201580075519.9A CN201580075519A CN107206443A CN 107206443 A CN107206443 A CN 107206443A CN 201580075519 A CN201580075519 A CN 201580075519A CN 107206443 A CN107206443 A CN 107206443A
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- China
- Prior art keywords
- overlay film
- mother metal
- region
- recess
- outer peripheral
- Prior art date
- 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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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Including：Prepare the process circumferentially in outer peripheral face (11) with the top mother metal (10) of recess (11z)；Arc spraying process, in the arc spraying process, spraying plating wire rod is blowed to the outer peripheral face (11) of top mother metal (10) using arc spraying, in overlay film (20a, 20b) of outer peripheral face (11) formation containing Fe and Fe oxides of top mother metal (10).Arc spraying process includes：The outer peripheral face (11) for coming directly towards mother metal (10) is divided into the dividing step in multiple regions (S1, S2) in the axial direction and implements the process of arc spraying respectively for each region (S1, S2).In dividing step, the boundary of region (S1, S2) is set in recess (11z).Thereby, it is possible to prevent the stripping of the overlay film at connecting portion, extend head lifetime.
Description
Technical field
The present invention relates to the manufacture method for the top perforated when seamless steel pipe is manufactured used in milling train.
Background technology
Seamless steel pipe can be by being completely that this graceful tubulation method is manufactured.The tubulation method includes such as following steps.
(1) enter eleven punch 11 to the raw material (round steel billet) for being heated to predetermined temperature using milling train (roll piercing mill) of perforating to roll
System, is shaped as hollow bloom (hollow shell).
(2) extension rolling is carried out to hollow bloom using elongating mill (such as mandrel mill).
(3) the hollow bloom fixed diameter rolling that has rolled will be extended into predetermined using precision mill (such as stretch reducer)
External diameter and wall thickness.
Perforation milling train possesses：A pair of angled roller, it is respectively relative to roll line inclination；The top of shell shape, it is configured
In on roll line；And plug, it is combined with the rear end of top.It is axial consistent with steel billet in roll line in drilling/rolling
In the state of, steel billet is circumferentially rotated using tilting roller while axially transporting steel billet.Accompany with this, top is pushed away
Enter the central part to steel billet, as a result, steel billet is shaped as hollow bloom by drilling/rolling.
In the drilling/rolling, eleven punch 11 is entered to the steel billet for being heated to high temperature (such as 1200 DEG C) using top, therefore,
Top is applied in high surface pressure at high heat.In order to protect the top for being exposed to such harsh situation, exist (female in top
Material) surface formed using arc spraying formation overlay film (hereinafter also referred to " arc spraying overlay film ") situation.Utilize the electricity
Arc spray coating blocks the heat transfer from steel billet to top mother metal, further, it is possible to prevent steel billet and the burn of top.As a result,
Can increase can carry out the number of times (pass) of drilling/rolling using every top to raw material, i.e. can extend head lifetime.
The top perforated used in milling train is by such as disclosure of patent document 1~3.Proposed in patent document 1 as follows
Scheme：Axial direction by the mother metal surface of top along top is divided into multiple regions, carries out arc spraying for each region successively.
In addition, it is also proposed following scheme：When arc spraying, by the blowout center line of arc spraying machine and the mother metal surface of top
Between intersecting angle maintain in the range of 35 °~90 °.Thereby, it is possible to make the arc spraying overlay film formed on top surface
Adaptation firmly, as a result, can further extend head lifetime.
Top proposed in patent document 2 has front end rolling portion, workpiece portion and precession portion.In addition, in the top
In, each size such as external diameter meets predetermined relational expression.Front end rolling portion includes cylindrical portion and the front end located at the cylindrical portion
Hemisphere planar portion.In addition, workpiece portion is connected with the rear end in front end rolling portion, the cross sectional shape in workpiece portion is arc-shaped.Precession
Portion is connected with the rear end in workpiece portion, and the cross sectional shape in precession portion is linear taper (Japanese：Line Xing テ ー パ ー shapes).
In patent document 2, drilling/rolling is carried out by using above-mentioned top, biting not for steel billet can be prevented
It is good, and defect in inner surface can be suppressed.
Top proposed in patent document 3 has rolling portion, precession portion and relief portion.Rolling portion is divided into leading portion
Rolling portion and back segment rolling portion.The cross sectional shape of the outer peripheral face in leading portion rolling portion is arc-shaped, and the front end in leading portion rolling portion is half
Dome shape.Back segment rolling portion is connected with the rear end of the outer peripheral face in leading portion rolling portion, and the cross sectional shape in back segment rolling portion is linear cone
Shape.Precession portion is connected with the rear end in back segment rolling portion, and the cross sectional shape in precession portion is linear taper.After relief portion and precession portion
End is connected, and the diameter of relief portion diminishes with away from front end.In the top of such shape, the chi such as radius of curvature of front end
It is very little to meet predetermined relational expression.
In patent document 3, even in the perforation for being set to the low piercing ratio of more than 1.15 high expander than and less than 2.0
In rolling, by using above-mentioned top, it can also prevent that biting bad, afterbody blocks (Japanese：Buttocks Scold ま り) and pipe
Thickness deviation deteriorate.
Prior art literature
Patent document
Patent document 1：No. 5365723 publications of Japanese Patent
Patent document 2：No. 3823762 publications of Japanese Patent
Patent document 3：No. 3119160 publications of Japanese Patent
Patent document 4：No. 5339016 publications of Japanese Patent
The content of the invention
Problems to be solved by the invention
As it was previously stated, proposing following scheme in patent document 1：Draw axial direction by the mother metal surface of top along top
It is divided into multiple regions, carries out arc spraying for each region successively.When so carrying out arc spraying respectively for each region, cover
Film is connected in the boundary in region each other.
Fig. 1 is the arc spraying for the boundary for representing the region in the case of having carried out arc spraying respectively for each region
The SEM pictures of overlay film.Figure 1 illustrates top mother metal 10 and arc spraying overlay film 20a, 20b, arc spraying overlay film is by front
The overlay film 20b and overlay film 20a of rear end side is constituted.Here, " front " refers to the front of top, " rear end side " refers to top
Rear end side.The overlay film 20b of front is connected with the overlay film 20a of rear end side in Fig. 1 part surrounded with double dot dash line.At this
In the case of, the overlay film 20b of a front part is not contacted with top mother metal 10, and is formed on the overlay film 20a of rear end side.
In addition, in Fig. 1 arc spraying overlay film 20a, 20b forming process, by moving back and forth arc spraying machine
To be laminated relatively thin layer.In this case, in the overlay film 20b of front and the overlay film 20a of rear end side, the layer of the stacking of overlay film
It is different from the surface angulation for coming directly towards mother metal 10.This is spraying plating direction (the arc spraying machine by the overlay film 20b of front
Blowing direction) and rear end side overlay film 20a spraying plating direction (blowing direction of arc spraying machine) it is different caused by.In Fig. 1
The overlay film 20b of front spraying plating direction and the overlay film 20a of rear end side spraying plating direction are shown respectively with solid arrow.
Part (hereinafter also referred to as " the connecting portion ") place being joined to one another in arc spraying overlay film, is formed on overlay film
Other overlay film, therefore, the closing force of overlay film are reduced than the closing force of other parts.In addition, forming other overlay film on overlay film
Thickness of scope and each overlay film etc. changes in the circumference of top, and this also causes the closing force of the overlay film of connecting portion to reduce.
Therefore, at connecting portion, it is prone to the stripping of overlay film (with reference to Fig. 9 of embodiment described later).The top nothing that overlay film has been peeled off
Method is re-used for drilling/rolling, reaches head lifetime.Therefore, in the case where having carried out arc spraying respectively for each region,
It is desirable that, suppressing the stripping of the overlay film at connecting portion, extend head lifetime.
The stripping of overlay film at connecting portion is especially susceptible to occur in the drilling/rolling of the steel billet formed by high-alloy steel.This
It is because high-alloy steel is high intensity.In addition, belonging to such as the high Cr steel containing more than 9% Cr, Ni based alloys, stainless steel
In high-alloy steel.
In patent document 2 and 3, it is proposed that using with predetermined shape and meeting the top of predetermined relational expression, but
Formation and stripping to overlay film is not on the books.
It is an object of the invention to provide a kind of stripping that can prevent overlay film at connecting portion and extension head lifetime
The manufacture method of top.
The solution used to solve the problem
The manufacture method of the top of one embodiment of the present invention is made in milling train of being perforated when manufacturing seamless steel pipe
The manufacture method of top.The manufacture method includes：Prepare the work of top mother metal that circumferentially there is recess in outer peripheral face
Sequence；Arc spraying process, in the arc spraying process, using arc spraying by spraying plating wire rod to it is described top mother metal periphery
Face is blowed, in overlay film of the outer peripheral face formation containing Fe and Fe oxides of the top mother metal.The arc spraying process includes
The outer peripheral face of the top mother metal is divided into the dividing step in multiple regions and real respectively for each region in the axial direction
The process for applying arc spraying.In the dividing step, the boundary in the region is set in the recess.
Can also be that the outer peripheral face of the top mother metal is axially to be sequentially connected multiple divisional planes and formed
, and there is the recess in the joint portion of the divisional plane.In this case, in the joint portion as the recess
Place, the divisional plane of the gradient θ 1 (°) positioned at the divisional plane of the front of the top and the rear end side positioned at the top it is oblique
Degree θ 2 (°) meets following (1) formulas.
The ＜ θ 2 (1) of θ 1
The effect of invention
The manufacture method of the top of the present invention uses the top mother metal circumferentially in outer peripheral face with recess.In addition,
The boundary of recess setting regions and be divided into multiple regions, form arc spraying overlay film respectively for each region.In this case,
The connecting portion of overlay film is in recess, at the recess, and the wall thickness drafts of steel billet is than relatively low when drilling/rolling.Therefore, overlay film
Stripping be suppressed, head lifetime can be extended.
Brief description of the drawings
Fig. 1 is the arc spraying for the boundary for representing the region in the case of having carried out arc spraying respectively for each region
The SEM pictures of overlay film.
Fig. 2 is the schematic diagram of the handling process example for the manufacture method for representing the top of the present invention, and Fig. 2 (a) is to represent top
The figure of the shape of head mother metal, Fig. 2 (b) is to represent the sectional view that the overlay film in the 1st region is formed after terminating, and Fig. 2 (c) is to represent
The sectional view that the overlay film in the 2nd region is formed after terminating.
Fig. 3 is to represent of the invention in the case of the top that the front end using outer peripheral face is connected with plane front end face
The schematic diagram of handling process example, Fig. 3 (a) is the figure for representing to come directly towards the shape of mother metal, and Fig. 3 (b) is to represent covering for the 1st region
The sectional view that film is formed after terminating, Fig. 3 (c) is to represent the sectional view that the overlay film in the 2nd region is formed after terminating, and Fig. 3 (d) is
Represent the sectional view that the overlay film of front end face is formed after terminating.
Fig. 4 is the schematic diagram for representing to test No.1 (comparative example) handling process, and Fig. 4 (a) represents to come directly towards mother metal
The figure of shape, Fig. 4 (b) is to represent the sectional view that the overlay film in the 1st region is formed after terminating, and Fig. 4 (c) is to represent the 2nd region
Overlay film formation terminate after sectional view.
Fig. 5 is the sectional view for the handling process for schematically showing experiment No.3 (comparative example), and Fig. 5 (a) represents the 1st area
After the overlay film formation in domain terminates, after Fig. 5 (b) represents that the overlay film formation in the 2nd region terminates.
Fig. 6 is the sectional view for the handling process for schematically showing experiment No.5 (comparative example), and Fig. 6 (a) represents the 1st area
After the overlay film formation in domain terminates, after Fig. 6 (b) represents that the overlay film formation in the 2nd region terminates, Fig. 6 (c) represents covering for front end face
After film formation terminates.
Fig. 7 is the schematic diagram for representing to test No.6 (example of the present invention) handling process, and Fig. 7 (a) is to represent to come directly towards mother metal
Shape figure, Fig. 7 (b) be represent the 1st region overlay film formation terminate after sectional view, Fig. 7 (c) is to represent the 2nd area
The sectional view that the overlay film in domain is formed after terminating, Fig. 7 (d) is to represent the sectional view that the overlay film of front end face is formed after terminating.
Fig. 8 is the sectional view for the handling process for testing No.7 (comparative example), and Fig. 8 (a) represents that the overlay film in the 1st region is formed
After end, after Fig. 8 (b) represents that the overlay film formation in the 2nd region terminates, Fig. 8 (c) represents that the overlay film formation of front end face terminates
Afterwards.
Fig. 9 is the photo for the stripping for representing overlay film.
Embodiment
Hereinafter, the manufacture method referring to the drawings to the top of present embodiment is illustrated.
Fig. 2 is the schematic diagram of the handling process example for the manufacture method for representing the top of the present invention, and Fig. 2 (a) is to represent top
The figure of the shape of head mother metal, Fig. 2 (b) is to represent the sectional view that the overlay film in the 1st region is formed after terminating, and Fig. 2 (c) is to represent
The sectional view that the overlay film in the 2nd region is formed after terminating.Figure 2 illustrates top mother metal 10 and arc spraying overlay film 20a, 20b.Separately
Outside, the front of top is represented with reference T, and rear end side is represented with reference B.
The outer peripheral face 11 of top mother metal 10 shown in Fig. 2 (a) be by the divisional plane 11e of the 1st divisional plane 11a~the 5th along
Formed by being axially sequentially connected.In other words, outer peripheral face 11 is divided into multiple faces with axially vertical face.In the 1st divisional plane
In 11a and the 2nd divisional plane 11b, cross sectional shape is curve-like, and gradient changes in the axial direction.In addition, gradient is divisional plane and top
The center line angulation (θ 1 and θ 2 in (a) of reference picture 2) of mother metal.In addition, in the 3rd divisional plane 11c, cross sectional shape
It is linear, gradient is constant.The divisional plane 11c of such 1st divisional plane 11a~the 3rd external diameter is from front T towards rear end side
B becomes larger.
4th divisional plane 11d is the cylindrical portion of external diameter constant.In addition, the 5th divisional plane 11e external diameter is with close rear end
Diminish.5th divisional plane 11e is referred to as relief portion.In the drilling/rolling using such top, the 1st divisional plane 11a~3rd
Divisional plane 11c external diameter becomes larger, therefore, and the divisional plane 11c of mainly the 1st divisional plane 11a~the 3rd contributes to drilling/rolling.
In other words, the divisional plane 11c of the 1st divisional plane 11a~the 3rd and steel billet forced contact, at high heat high surface pressure be applied in these points
Face.
Joint portion between in divisional plane 11a~11e joint portion, the 1st divisional plane 11a and the 2nd divisional plane 11b turns into
Recess 11z.The manufacture method of the top of present embodiment prepares such circumferentially top with recess shown in Fig. 2 (a)
Head mother metal.
In addition, the manufacture method of the top of present embodiment includes the process and arc spraying for preparing above-mentioned top mother metal
Process.In the arc spraying process, spraying plating wire rod (such as iron wire material) is heated using arc spraying and Fe are formed
Son, the Fe particles are blowed to the mother metal outer peripheral face 11 of top.Thus, Fe build-up of particles is in the mother metal outer peripheral face 11 of top, shape
Into overlay film 20a, 20b.In this process, a part for Fe particles occurs oxidation reaction with atmosphere gas and turns into Fe oxides.
Therefore, overlay film 20a, 20b contains Fe and Fe oxides.
In arc spraying process, the mother metal outer peripheral face 11 of top is divided into multiple regions in the axial direction, for each area
Domain forms overlay film respectively.Thus, in the same manner as foregoing patent document 1, it can make to cover in the arc spraying that top surface is formed
The adaptation of film is firm.In the handling process example shown in Fig. 2, the mother metal outer peripheral face 11 of top is divided into the 1st of rear end side B the
Region S1 and front T the 2nd region S2, after the 1st region S1 formation overlay films, in the 2nd region S2 formation overlay films.
In addition, in the manufacture method of the top of present embodiment, by region when multiple region S1 and S2 are divided into
Boundary be set in recess 11z.In this case, in the top obtained, the arc spraying overlay film as shown in Figure 1
Connecting portion in recess 11z.
When drilling/rolling, at recess 11z, the wall thickness drafts of steel billet is lower than the wall thickness drafts of other parts,
Put on recess 11z face pressure also local step-down.Thus, the face pressure for putting on the connecting portion 20z of overlay film is also alleviated.In connection
In the case that portion is located at recess 11z, the closing force of ground same overlay film is reduced at connecting portion as described above, but due to
The mitigation of the connecting portion 20z of overlay film face pressure is put on, the stripping of overlay film can be suppressed, head lifetime can be extended.
In the present invention, " recess " refers to that the wall thickness drafts for coming directly towards in the outer peripheral face of mother metal, steel billet compares other parts
The low part of wall thickness drafts.In other words, by the vicinity of following point A closed curves circumferentially formed and the closed curve
As recess.Point A is to come directly towards the point on the outer peripheral face of mother metal, the rear end side of the gradient θ 1 (°) of the front of point and point it is oblique
Degree θ 2 (°) meets the relation of following (1) formulas.In the closed curve formed by point A, the gradient of front diminishes, therefore, steel billet
Wall thickness drafts it is lower than the wall thickness drafts of other parts.
The ＜ θ 2 (1) of θ 1
Here, the gradient θ 1 of the front of point is the periphery than the forward side of point in the tangent line of the outer peripheral face at the point
The center line angulation of the tangent line in face and top mother metal, the gradient θ 2 of the rear end side of point is the tangent line of the outer peripheral face at the point
In than the point rearward the tangent line of the outer peripheral face of side with top mother metal center line angulation.
As top mother metal, can be using the outer peripheral face 11 as shown in Figure 2 by multiple divisional planes axially
Mother metal is come directly towards formed by being sequentially connected.In this case, recess 11z can be set to the gradient θ 1 of front T divisional plane
(reference picture 2, unit：°) and rear end side B divisional plane gradient θ 2 (reference picture 2, unit：°) pass of (1) formula described in satisfaction
The joint portion of system.But, the gradient θ 1 and θ of divisional plane are the center line angulations of divisional plane and top mother metal.In addition,
In the case that gradient changes in the axial direction, the gradient θ 1 and θ 2 of divisional plane are set to the gradient of the tangent line at the joint portion.
In the case of there is recess in the joint portion of divisional plane, it is preferred that the recess for the boundary of setting regions
11z d θ are more than 0.5 °.Here, d θ are θ 2 and θ 1 differences (θ 2- θ 1).If d θ are more than 0.5 °, the steel billet at recess
Wall thickness drafts is lower, can more suppress the stripping of overlay film.On the other hand, if d θ are more than 20 °, the change of wall thickness drafts
Also become big, therefore, the precision of the pipe obtained is possible to deteriorate.It is therefore preferable that d θ are set to less than 20 °.
The order for carrying out the region of arc spraying is not particularly limited, as long as the boundary in region is set in into recess, just
The stripping of overlay film can be suppressed.From the viewpoint of the further stripping for suppressing overlay film, it is preferred that the electric arc spray in each region
Plating is first carried out in the region of the rear end side of recess, afterwards, and the region of the front of recess is implemented.Because, in connecting portion
Place, forms the overlay film of front on the overlay film of rear end side, therefore, and the overlay film of rear end side is covered by the overlay film of front.
The division in region is not limited to be divided into the situation of two as shown in said Fig. 2, can also be divided into 3
Region above.In such a situation it is preferred that the boundary in multiple regions is set into recess.
Top mother metal is not limited to the top mother metal shown in described Fig. 2, as long as circumferentially having recess in outer peripheral face,
Various top mother metals can just be used.For example, being used as top mother metal, it would however also be possible to employ described in foregoing patent document 2 and 3
Top.Joint portion of the top between front end rolling portion and workpiece portion described in foregoing patent document 2 has recess.Separately
Outside, joint portion of the top described in foregoing patent document 3 between leading portion rolling portion and back segment rolling portion has recess.
Top mother metal shown in described Fig. 2 has the cylindrical portion 11d of external diameter constant, but it is also possible to using without cylindrical portion
Top mother metal.In this case, part 11a~11c of drilling/rolling rear end side and relief portion 11e phases is mainly helped
Even.
The top mother metal that the front end 11t of the outer peripheral face 11 of top mother metal is not limited to as shown in said Fig. 2 extends like that
To the situation of center line, it can also be connected with plane front end face.
Fig. 3 is to represent of the invention in the case of the top that the front end using outer peripheral face is connected with plane front end face
The schematic diagram of handling process example, Fig. 3 (a) is the figure for representing to come directly towards the shape of mother metal, and Fig. 3 (b) is to represent covering for the 1st region
The sectional view that film is formed after terminating, Fig. 3 (c) is to represent the sectional view that the overlay film in the 2nd region is formed after terminating, and Fig. 3 (d) is
Represent the sectional view that the overlay film of front end face is formed after terminating.Figure 3 illustrates top mother metal 10 and arc spraying overlay film 20a,
20b。
In top mother metal shown in (a) in Fig. 3, the front end 11t of outer peripheral face 11 is connected with plane front end face 12.Separately
Outside, outer peripheral face 11 be the divisional plane 11e of the 1st divisional plane 11a~the 5th is axially sequentially connected formed by.In addition, the 1st
In the divisional plane 11c of divisional plane 11a~the 3rd, external diameter becomes larger from front T towards rear end side B.Wherein, in the 1st divisional plane
In 11a, cross sectional shape is curve-like, and gradient changes in the axial direction.In addition, the 2nd divisional plane 11b and the 3rd divisional plane 11c gradient
Constant, the cross sectional shape of these divisional planes is linear taper.4th divisional plane 11d is cylindrical portion, and the 5th divisional plane 11e is to avoid
Portion.
In such divisional plane, the divisional plane 11c of mainly the 1st divisional plane 11a~the 3rd contributes to drilling/rolling.In addition,
In the joint portion of divisional plane, the joint portion between the 2nd divisional plane 11b and the 3rd divisional plane 11c turns into recess circumferentially
11z。
In handling process example shown in (d) in Fig. 3 (b)~Fig. 3, the outer peripheral face for coming directly towards mother metal is divided into rear end side
B the 1st region S1 and front T the 2nd region S2.Now, the 1st region S1 and the 2nd region S2 boundary is set in recess
11z.In arc spraying, after the 1st region S1 formation overlay films 20a, in the 2nd region S2 formation overlay film 20b, afterwards, preceding
The formation overlay film of end face 12 20c.
The boundary in region is set in recess in arc spraying process if so, then outer peripheral face front end 11t with it is flat
It in the case that the front end face 12 of planar is connected, can also suppress the stripping of the overlay film at connecting portion 20z, the top longevity can be extended
Life.
Preferably, recess 11z is configured at part outer peripheral face, mainly helping drilling/rolling of top mother metal, changes
Yan Zhi, recess 11z are configured at part outer peripheral face, in addition to cylindrical portion and relief portion of top mother metal.Because,
The connecting portion of overlay film is in the case of the part of drilling/rolling is mainly helped, it is prone to the stripping of overlay film.
As spraying plating wire rod, such as iron wire material (steel wire) can be used.In addition, can also use patent document 4
Described such flux cored wire, the flux cored wire possesses iron pipe (steel sheath tube) and is filled in its inside
Powder.The powder for being filled in the inside of pipe can be such as ZrO2Powder or BN powder.In addition, can be croci
(iron oxide powder), in this case, can also also fill up iron powder (steel powder).
Here, iron wire material is the wire rod of such as carbon steel (ordinary steel), iron pipe is the pipe of such as carbon steel (ordinary steel),
Iron powder is the powder of such as carbon steel (ordinary steel).The carbon steel typically using Fe as principal component, containing carbon (C), silicon (Si),
Manganese (Mn) and impurity.Carbon steel is also referred to as ordinary steel, can also contain the arbitrary elements such as tungsten (W).
Embodiment
In order to confirm the present invention top manufacture method effect, make top, perforated using the top
Rolling.
[making of top]
In the making of top, first, the top mother metal that the Thermal tool steel as defined in JIS is formed is prepared.Utilize electric arc
Coating machine makes iron wire material particlized and blowed to the outer peripheral face of the top mother metal, the outer peripheral face of the top mother metal form by
The overlay film that Fe and Fe oxides are constituted.Now, the outer peripheral face for coming directly towards mother metal is divided into the region of rear end side and the area of front
Domain, forms after overlay film in the region of rear end side, overlay film is formd in the region of front.
In this experiment, experiment No.1~7 are set, the boundary position in shape, the 1st region and the 2nd region to coming directly towards mother metal
Put and changed.
Fig. 4 is the schematic diagram for representing to test No.1 (comparative example) handling process, and Fig. 4 (a) represents to come directly towards mother metal
The figure of shape, Fig. 4 (b) is to represent the sectional view that the overlay film in the 1st region is formed after terminating, and Fig. 4 (c) is to represent the 2nd region
Overlay film formation terminate after sectional view.In experiment No.1, the outer peripheral face 11 of mother metal is come directly towards by the 1st divisional plane 11a~3rd point
Face 11c is constituted.1st divisional plane 11a cross sectional shape is curve-like.2nd divisional plane 11b is cylindrical portion, the 3rd divisional plane 11c
It is relief portion.In these divisional planes, mainly the 1st divisional plane 11a contributes to drilling/rolling.
In this way, in experiment No.1, using the top mother metal without recess, region S1 and S2 boundary are set in the
1 divisional plane 11a.The desired value of the thickness of overlay film is set to 300 μm in the 1st region S1, and 800 μm are set in the 2nd region S2.
In experiment No.2 (example of the present invention), overlay film is formd according to the handling process example shown in described Fig. 2.It is specific and
Speech, has recess 11z top mother metal using the joint portion between the 1st divisional plane 11a and the 2nd divisional plane 11b, by region
S1, S2 boundary are set in recess 11z.At recess 11z, the 1st divisional plane 11a gradient θ 1 is 10 °, the 2nd divisional plane 11b's
Gradient θ 2 is 23.5 °.The desired value of the thickness of overlay film is set to 300 μm in the 1st region S1, and 800 μm are set in the 2nd region S2.
Fig. 5 is the sectional view for the handling process for schematically showing experiment No.3 (comparative example), and Fig. 5 (a) represents the 1st area
After the overlay film formation in domain terminates, after Fig. 5 (b) represents that the overlay film formation in the 2nd region terminates.As shown in figure 5, experiment No.3 top
Head mother metal has recess 11z in the same manner as experiment No.2.It is different from experiment No.2 in experiment No.3, region S1 and S2 point
Boundary is not set at recess 11z, and is set at the 2nd divisional plane 11b.The desired value of the thickness of overlay film with experiment No.2 this cover
The desired value of the thickness of film is identical.
In experiment No.4 (example of the present invention), overlay film is formd according to the handling process example shown in described Fig. 3.It is specific and
Speech, top mother metal has recess 11z in the 1st divisional plane 11a and the 2nd divisional plane 11b joint portion, the front end 11t of outer peripheral face and
Plane front end face 12 is connected.In experiment No.4, region S1 and S2 boundary are set in recess 11z.In recess 11z
Place, the 1st divisional plane 11a gradient θ 1 is 6.5 °, and the 2nd divisional plane 11b gradient θ 2 is 7.5 °.The desired value of the thickness of overlay film exists
300 μm are set in 1st region S1,600 μm are set in the 2nd region S2,800 μm are set in front end face 12.
Fig. 6 is the sectional view for the handling process for schematically showing experiment No.5 (comparative example), and Fig. 6 (a) represents the 1st area
After the overlay film formation in domain terminates, after Fig. 6 (b) represents that the overlay film formation in the 2nd region terminates, Fig. 6 (c) represents covering for front end face
After film formation terminates.As shown in fig. 6, experiment No.5 top mother metal has recess 11z in the same manner as experiment No.4.In experiment
In No.5, different from experiment No.4, region S1 and S2 boundary are not set in recess 11z, and are set at the 1st divisional plane 11a.
The desired value of the thickness of the overlay film of the desired value of the thickness of overlay film with testing No.4 is identical.
Fig. 7 is the schematic diagram for representing to test No.6 (example of the present invention) handling process, and Fig. 7 (a) is to represent to come directly towards mother metal
Shape figure, Fig. 7 (b) be represent the 1st region overlay film formation terminate after sectional view, Fig. 7 (c) is to represent the 2nd area
The sectional view that the overlay film in domain is formed after terminating, Fig. 7 (d) is to represent the sectional view that the overlay film of front end face is formed after terminating.In examination
Test in No.6, the top mother metal for having used outer peripheral face 11 to be made up of the divisional plane 11f of the 1st divisional plane 11a~the 6th.Outer peripheral face 11
Front end 11t is connected with plane front end face 12.The divisional plane 11d of mainly the 1st divisional plane 11a~the 4th contributes to drilling/rolling,
5th divisional plane 11e is cylindrical portion, and the 6th divisional plane 11f is relief portion.In the joint portion of these divisional planes, the 2nd divisional plane 11b
Joint portion between the 3rd divisional plane 11c is recess 11z.2nd divisional plane 11b gradient θ 1 is 5 °, and the 3rd divisional plane 11c's is oblique
It is 8 ° to spend θ 2.
In experiment No.6, region S1, S2 of arc spraying boundary are set in recess 11z.The mesh of the thickness of overlay film
Scale value is set to 300 μm in the 1st region S1, and 600 μm are set in the 2nd region S2, and 800 μm are set in front end face 12.
Fig. 8 is the sectional view for representing to test No.7 (comparative example) handling process, and Fig. 8 (a) represents the overlay film in the 1st region
After formation terminates, after Fig. 8 (b) represents that the overlay film formation in the 2nd region terminates, Fig. 8 (c) represents the overlay film formation knot of front end face
Shu Hou.As shown in figure 8, experiment No.7 top mother metal has recess 11z in the same manner as experiment No.6.In experiment No.7, with
No.6 differences are tested, region S1 and S2 boundary are not set in recess 11z, and are set at the segmentations of the 1st divisional plane 11a and the 2nd
Joint portion between the 11b of face.The desired value of the thickness of the overlay film of the desired value of the thickness of overlay film with testing No.6 is identical.
In any experiment, the maximum diameter of top is all set to 57mm, and the length of top mainly helps drilling/rolling
Adding up to for divisional plane, is set to 114mm.
[drilling/rolling]
By model milling train (Japanese：モ デ Le ミ Le) carry out drilling/rolling in by it is each top reused 3 times.Steel
Base is the stainless steels of SUS304.The condition, the size of steel billet, the size of the pipe obtained of drilling/rolling are shown in table 1.
[table 1]
[evaluation index]
After 3 drilling/rollings terminate, visually confirm the state of the overlay film of top." state of overlay film " of table 2 below
The meaning of mark in column is as described as follows.
○：Represent that the overlay film at connecting portion is not peeled off, well.
×：Represent that the overlay film at connecting portion is peeling-off, it is bad.
[result of the test]
Experiment No., experiment differentiation, the state of overlay film are shown in table 2.
[table 2]
| Test NO. | Distinguish | The state of overlay film |
| No.1 | Comparative example | × |
| No.2 | Example of the present invention | ○ |
| No.3 | Comparative example | × |
| No.4 | Example of the present invention | ○ |
| No.5 | Comparative example | × |
| No.6 | Example of the present invention | ○ |
| No.7 | Comparative example | × |
According to table 2, in experiment No.1 (comparative example), using the top without recess, the stripping of overlay film there occurs.Separately
Outside, in experiment No.3, No.5, No.7 of comparative example, using the top with recess, also, not by point in region
Boundary has carried out arc spraying respectively in the case of being located at recess for each region.As a result, there occurs the stripping of overlay film.
Fig. 9 is the photo for the stripping for representing overlay film.Represent that having carried out 3 times in experiment No.1 (comparative example) wears in fig .9
Top after the rolling of hole, by double dot dash line round the part for showing the position that overlay film has been peeled off.As shown in figure 9, rear end side
Overlay film 20a there occurs local stripping using the connecting portion 20z between the overlay film 20a of rear end side and the overlay film 20b of front as starting point
From.
On the other hand, experiment No.2, No.4, No.6 of example of the present invention use the top with recess, and that will divide
The mode that boundary is located at recess has carried out arc spraying respectively for each region.As a result, the stripping of overlay film does not occur.According to this
A bit, it is therefore apparent that as long as using the mother metal and the pin in the way of the boundary in region is set in into recess circumferentially with recess
Arc spraying is carried out respectively to each region, it becomes possible to suppress the stripping of the overlay film at connecting portion.
Industrial applicability
The present invention can be effectively utilized in the manufacture of the seamless steel pipe of high-alloy steel.
The explanation of reference
10th, mother metal is come directly towards；11st, outer peripheral face；11a~11f, divisional plane；11t, outer peripheral face front end；11z, recess；12nd, it is preceding
End face；20a~20c, overlay film；20z, connecting portion；S1, S2, the region for being divided out；θ 1, θ 2, the gradient of divisional plane.
Claims (2)
1. a kind of manufacture method of top, it is the manufacturer for the top perforated when seamless steel pipe is manufactured used in milling train
Method, the manufacture method includes：
Prepare the process of top mother metal that circumferentially there is recess in outer peripheral face；And
Arc spraying process, in the arc spraying process, the outer of mother metal is come directly towards using arc spraying by spraying plating wire rod to described
Side face is blowed, in overlay film of the outer peripheral face formation containing Fe and Fe oxides of the top mother metal,
The arc spraying process includes：
The outer peripheral face of the top mother metal is divided into the dividing step in multiple regions in the axial direction；And
Implement the process of arc spraying respectively for each region,
In the dividing step, the boundary in the region is set in the recess.
2. the manufacture method of top according to claim 1, wherein,
The outer peripheral face of the top mother metal be multiple divisional planes are axially sequentially connected formed by, and at described point
The joint portion of face has the recess,
At the joint portion as the recess, positioned at the gradient θ 1 of the divisional plane of the front of the top and positioned at institute
The gradient θ 2 for stating the divisional plane of the rear end side of top meets following (1) formulas,
The ＜ θ 2 (1) of θ 1,
Wherein, gradient θ 1, θ 2 unit are °.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-023282 | 2015-02-09 | ||
| JP2015023282 | 2015-02-09 | ||
| PCT/JP2015/005772 WO2016129019A1 (en) | 2015-02-09 | 2015-11-18 | Method for manufacturing plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107206443A true CN107206443A (en) | 2017-09-26 |
| CN107206443B CN107206443B (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580075519.9A Active CN107206443B (en) | 2015-02-09 | 2015-11-18 | The manufacturing method of top |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20180023179A1 (en) |
| EP (1) | EP3257596B1 (en) |
| JP (1) | JP6380562B2 (en) |
| CN (1) | CN107206443B (en) |
| BR (1) | BR112017015320B1 (en) |
| WO (1) | WO2016129019A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7493161B2 (en) | 2019-12-27 | 2024-05-31 | Ｊｆｅスチール株式会社 | Plug for manufacturing seamless steel pipe, piercing mill for manufacturing seamless steel pipe, and manufacturing method for seamless steel pipe |
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| JP2011115816A (en) * | 2009-12-02 | 2011-06-16 | Sumitomo Metal Ind Ltd | Method for coating lubricant and equipment row of regenerating plug used for the same |
| CN102341193A (en) * | 2009-03-03 | 2012-02-01 | 住友金属工业株式会社 | Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| JP2013521128A (en) * | 2010-03-02 | 2013-06-10 | エスエムエス メーア ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method for manufacturing a hot tool |
| JP5435184B1 (en) * | 2012-07-20 | 2014-03-05 | 新日鐵住金株式会社 | Perforated plug |
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| US4207356A (en) * | 1976-12-09 | 1980-06-10 | The D. L. Auld Company | Method for coating glass containers |
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| JPH09276908A (en) * | 1996-04-18 | 1997-10-28 | Nippon Steel Corp | Plug for piercing seamless steel tube |
| JP3119160B2 (en) * | 1996-05-15 | 2000-12-18 | 住友金属工業株式会社 | Manufacturing method of seamless pipe |
| GB0014087D0 (en) * | 2000-06-10 | 2000-08-02 | Plascoat Systems Limited | Composition and method of coating automotive underbodies |
| JP3823762B2 (en) * | 2001-06-13 | 2006-09-20 | 住友金属工業株式会社 | Seamless metal pipe manufacturing method |
| FR2906078B1 (en) * | 2006-09-19 | 2009-02-13 | Commissariat Energie Atomique | METHOD FOR MANUFACTURING A MIXED MICRO-TECHNOLOGICAL STRUCTURE AND A STRUCTURE THUS OBTAINED |
| JP5650971B2 (en) * | 2010-09-30 | 2015-01-07 | 矢崎総業株式会社 | Switch device |
| AR088498A1 (en) * | 2011-11-01 | 2014-06-11 | Nippon Steel & Sumitomo Metal Corp | PUNCHING DEVICE, PUNCH USED FOR THE PUNCHING DEVICE, AND METHOD FOR THE PRODUCTION OF WELDED STEEL PIPES |
| JP5365723B2 (en) * | 2012-04-24 | 2013-12-11 | 新日鐵住金株式会社 | Manufacturing method of piercing and rolling plug |
| JP5339016B1 (en) * | 2012-06-05 | 2013-11-13 | 新日鐵住金株式会社 | Manufacturing method of piercing and rolling plug |
| BR112015008558B1 (en) * | 2013-01-11 | 2021-02-09 | Nippon Steel Corporation | buffer for hot tube production |
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2015
- 2015-11-18 JP JP2016574529A patent/JP6380562B2/en active Active
- 2015-11-18 US US15/549,480 patent/US20180023179A1/en not_active Abandoned
- 2015-11-18 WO PCT/JP2015/005772 patent/WO2016129019A1/en active Application Filing
- 2015-11-18 EP EP15881895.5A patent/EP3257596B1/en active Active
- 2015-11-18 BR BR112017015320-3A patent/BR112017015320B1/en active IP Right Grant
- 2015-11-18 CN CN201580075519.9A patent/CN107206443B/en active Active
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|---|---|---|---|---|
| CN102341193A (en) * | 2009-03-03 | 2012-02-01 | 住友金属工业株式会社 | Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| JP2011115816A (en) * | 2009-12-02 | 2011-06-16 | Sumitomo Metal Ind Ltd | Method for coating lubricant and equipment row of regenerating plug used for the same |
| JP2013521128A (en) * | 2010-03-02 | 2013-06-10 | エスエムエス メーア ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method for manufacturing a hot tool |
| CN104245170A (en) * | 2012-04-24 | 2014-12-24 | 新日铁住金株式会社 | Facility for producing piercing plug |
| CN104254407A (en) * | 2012-04-24 | 2014-12-31 | 新日铁住金株式会社 | Plug used in piercing machine |
| JP5435184B1 (en) * | 2012-07-20 | 2014-03-05 | 新日鐵住金株式会社 | Perforated plug |
Also Published As
| Publication number | Publication date |
|---|---|
| US20180023179A1 (en) | 2018-01-25 |
| CN107206443B (en) | 2019-07-09 |
| BR112017015320A8 (en) | 2022-11-01 |
| JP6380562B2 (en) | 2018-08-29 |
| EP3257596B1 (en) | 2019-10-02 |
| BR112017015320B1 (en) | 2022-12-06 |
| BR112017015320A2 (en) | 2018-01-09 |
| EP3257596A1 (en) | 2017-12-20 |
| EP3257596A4 (en) | 2017-12-20 |
| WO2016129019A1 (en) | 2016-08-18 |
| JPWO2016129019A1 (en) | 2017-10-12 |
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