CN104364413A - Manufacturing method for piercing plug - Google Patents
Manufacturing method for piercing plug Download PDFInfo
- Publication number
- CN104364413A CN104364413A CN201380029651.7A CN201380029651A CN104364413A CN 104364413 A CN104364413 A CN 104364413A CN 201380029651 A CN201380029651 A CN 201380029651A CN 104364413 A CN104364413 A CN 104364413A
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- China
- Prior art keywords
- plug
- particle
- overlay film
- manufacture method
- flux
- Prior art date
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- Granted
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000002245 particle Substances 0.000 claims abstract description 110
- 238000005507 spraying Methods 0.000 claims abstract description 99
- 229910052742 iron Inorganic materials 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims description 35
- 239000007787 solid Substances 0.000 claims description 25
- 239000000314 lubricant Substances 0.000 claims description 24
- 239000004020 conductor Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 17
- 238000005480 shot peening Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 35
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007751 thermal spraying Methods 0.000 abstract 1
- 239000010953 base metal Substances 0.000 description 45
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 26
- 229910052582 BN Inorganic materials 0.000 description 25
- 238000002844 melting Methods 0.000 description 14
- 230000008018 melting Effects 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 13
- 238000009413 insulation Methods 0.000 description 11
- 230000006978 adaptation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 229910000717 Hot-working tool steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 preferably Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000010284 wire arc spraying Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Lubricants (AREA)
Abstract
This manufacturing method for a piercing plug used in a piercing mill for manufacturing a seamless steel pipe includes a shot blasting step wherein shot blasting is applied to the plug surface and an arc spraying step wherein a thermal spraying wire is arc-sprayed onto the surface of base material of the shot-blasted plug in order to form a coating thereon. In the arc spraying step, the arc spraying is carried out by using a cored wire (1), which is produced by filling an iron tube (2) with iron particles (4) and at least low-thermal-conductivity material particles (3) that are selected from among low-thermal-conductivity material particles (3) having lower thermal conductivity characteristics than that of iron oxide(for example, ZrO2 particles), in order to form a coating comprising iron oxide, Fe, and the low-thermal-conductivity material. Because a coating with high heat-insulating performance can be formed, a plug that allows the plug life to be improved for the piercing process can be manufactured.
Description
Technical field
The roll piercing mill that the present invention relates to for the manufacture of weldless steel tube is (following, (following also referred to as the pierced billet plug used in " tapping machine (piercer) ", also referred to as " plug ") manufacture method, particularly relate to by with iron be main component the spraying plating of spraying plating wire arc to plug mother metal surface thus form the manufacture method of pierced billet plug of overlay film.
Background technology
Weldless steel tube can be manufactured by mannesmann process.This tubulation method comprises following step:
(1) tapping machine is utilized to carry out pierced billet to the starting material (round steel billet) being heated to specified temperature and be configured as hollow bloom (hollow shell);
(2) stretching milling train (example: mandrel mill) drawing/rolling hollow bloom is utilized;
(3) the hollow bloom fixed diameter rolling having utilized precision mill (example: stretch-reducing mill) by drawing/rolling is external diameter and the wall thickness of regulation.
Utilize in the pierced billet of tapping machine, use plug as perforation instrument.This plug in order to being installed in core iron front end and the steel billet being heated to the high temperature of about 1200 DEG C is bored a hole, is exposed to Gao Re and under the harsh situation of load height surface pressure.Plug, usually using hot working tool steel as mother metal, in order to protect this mother metal, forms the overlay film of oxide skin, on this basis for pierced billet on mother metal surface by heat treatment in advance.During pierced billet, the oxide skin overlay film of mandrel surface is born and to be blocked from steel billet to the thermal conduction of core rod base metal and prevent the effect of the burn-back of steel billet and plug.
The oxide skin overlay film of the plug of this band oxide skin overlay film wears away gradually along with pierced billet repeatedly.During the abrasion of oxide skin overlay film, the effect of heat insulation based on overlay film reduces, and therefore in perforation, the temperature of plug rises, and becomes the melting loss of easily generation core rod base metal, thermal distortion.In addition, when oxide skin overlay film disappears, core rod base metal directly contacts steel billet, there is burn-back, produce defect at the inner face of steel pipe.Therefore, plug becomes when losing overlay film and can not use, reaches the life-span.
When especially manufacturing the weldless steel tube formed by the high quality steel such as high Li-adding Al alloy, Ni base alloy, stainless steel of the Cr containing more than 9%, in the process of pierced billet, the abrasion of the oxide skin overlay film of mandrel surface significantly occur, and the plug life-span significantly reduces.Such as, in stainless perforation, the oxide skin overlay film of mandrel surface is through 2,3 passages (number of times of boring a hole continuously) abrasion, and this plug reaches the life-span.Therefore, produce the situation changing plug continually, the manufacture efficiency of steel pipe is low.So, when manufacturing the weldless steel tube of high quality steel, especially pierced billet time require to improve the plug life-span, improve the manufacture efficiency of steel pipe thus.
For such requirement, such as, Patent Document 1 discloses following plug: as the overlay film on surface being formed at core rod base metal, the overlay film that the surface arcing spraying plating iron wire material and being formed for core rod base metal is made up of Fe oxide compound and Fe is to the oxide skin overlay film replacing thermal treatment to obtain.About the plug of this band arc spraying overlay film, the overlay film of mandrel surface is made up of Fe oxide compound and Fe, therefore excellent, the raising that can expect the plug life-span of thermal insulation and anti-burn-back.
But, even if be the plug of band arc spraying overlay film disclosed in patent documentation 1, repeatedly during pierced billet, can not deny that overlay film along with heat input repeatedly, fold occurs, reaches the life-span.In addition, when the time of pierced billet is elongated, can not denies becoming large to the load of plug, produce the stripping of overlay film, the fold of overlay film, reach the life-span.These situations when the perforated longer of steel billet is long, the hot strength of steel billet significantly occurs when high.At this, in order to suppress the generation of fold in arc spraying overlay film, effectively by overlay film thick-film, the thermal insulation improving overlay film, but during by overlay film thick-film, the adaptation of core rod base metal and overlay film reduces, and overlay film can be peeled off ahead of time.Therefore, in the raising stably obtaining the plug life-span, there is room for improvement, strong needs manufactures the pierced billet plug that can improve this respect.
Existing patent documentation
Patent documentation
Patent documentation 1: Japanese Patent No. 4279350 publication
Summary of the invention
the problem that invention will solve
The present invention makes in view of the above-mentioned problems, by by by iron be main component the spraying plating of spraying plating wire arc to plug mother metal surface formed premised on overlay film, its object is to provide the manufacture method of the pierced billet plug with following characteristic:
Can stably improve the plug life-span.
for the scheme of dealing with problems
Purport of the present invention as described below.
A manufacture method for pierced billet plug, is characterized in that, it is the manufacture method for the manufacture of the plug used in the roll piercing mill of weldless steel tube,
The manufacture method of this pierced billet plug comprises:
The surface of plug is implemented to the blasting process of shot-peening; With
By the spraying plating of spraying plating wire arc to implement shot-peening plug mother metal surface and form the arc spraying operation of overlay film,
In arc spraying operation, as spraying plating wire rod, among the specific particle being used in iron particle and contributing to improving the plug life-span, at least specific particle flux-cored wire that is filled into the inside of iron pipe carries out arc spraying, forms the overlay film be made up of ferric oxide, Fe and specific particle.
In this manufacture method, aforementioned specific particle preferably has the low thermally conductive material particle of the characteristic lower than the thermal conductivity of ferric oxide.Now, aforementioned low thermally conductive material particle is preferably ZrO
2particle, aforementioned ZrO in aforementioned flux-cored wire
2the ratio that particle occupies is preferably 2.5 ~ 30.0 volume %.
In addition, in this manufacture method, aforementioned specific particle is preferably solid lubricant particle.Now, aforesaid solid lubricant particle is preferably BN particle, and the ratio that aforementioned BN particle occupies in aforementioned flux-cored wire is preferably 5.0 ~ 20.0 volume %.
the effect of invention
The manufacture method of pierced billet plug of the present invention has following unusual effect:
Can stably improve the plug life-span.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the spraying plating wire rod used in the arc spraying in the manufacture method of the pierced billet plug of the 1st embodiment of the present invention.
Fig. 2 is the cross-sectional view of the spraying plating wire rod used in the arc spraying in the manufacture method of the pierced billet plug of the 2nd embodiment of the present invention.
Fig. 3 is by the ZrO in flux-cored wire as the test-results of embodiment 1
2the relation of the deflection of the ratio that particle occupies and core rod base metal arranges the figure obtained.
Fig. 4 is that the ratio occupied by the BN particle in flux-cored wire as the test-results of embodiment 2 arranges with the relation of plug life-span ratio the figure obtained.
Embodiment
The present inventor, in order to reach above-mentioned purpose, to be formed premised on overlay film by the spraying plating wire arc spraying plating taking iron as main component to the surface of core rod base metal, implements various test for the gimmick forming this overlay film, repeatedly furthers investigate.Its result obtains following opinion.
Arc spraying is following technology, such as between the front end of 2 spraying plating wire rods as electrode, produce electric arc, make the melting of spraying plating wire rod, between the front end of spraying plating wire rod, spray supply pressurized air, nitrogen etc. melting material is blown away simultaneously, thus melting material is blown into object and forms overlay film.In arc spraying disclosed in aforementioned patent literature 1, use iron wire material as spraying plating wire rod, the overlay film being thus formed at the mother metal surface of plug is made up of Fe oxide compound (ferric oxide) and Fe.Fe oxide compound in this overlay film is the iron wire material melting when arc spraying, this molten pig occurring in-flight till arriving core rod base metal surface is oxidized the material generated.Fe in overlay film is the material that molten pig keeps not arriving with not being oxidized core rod base metal surface awing.
(1) in contrast, as spraying plating wire rod, adopt and fill the low thermally conductive material particle with the characteristic lower than the thermal conductivity of ferric oxide, the flux-cored wire of according to circumstances filling iron particle further using the iron pipe identical with iron wire material as shell, in this iron pipe, if use this flux-cored wire to carry out arc spraying, then can form on the mother metal surface of plug the overlay film be made up of Fe oxide compound (ferric oxide), Fe and low thermally conductive material.Fe oxide compound in this overlay film is form the iron pipe of flux-cored wire and iron particle fusion, this molten pig in-flight oxidation to occur thus the material generated when arc spraying till arriving core rod base metal surface.Fe in overlay film is the material that molten pig keeps not arriving with not being oxidized core rod base metal surface awing.In addition, the low thermally conductive material in overlay film is form the material that the low thermally conductive material particle of flux-cored wire reaches core rod base metal surface.
The overlay film so formed by using the arc spraying of flux-cored wire contains and will form the low thermally conductive material particle of flux-cored wire as root, lower than the thermal conductivity of Fe oxide compound low thermally conductive material, even if therefore do not carry out thick-film, thermal insulation also uprises.So the thermal insulation of plug overlay film when pierced billet repeatedly of such band arc spraying overlay film is high, therefore stably improve the plug life-span.That is, low thermally conductive material particle is the specific particle contributing to improving the plug life-span.
(2) as spraying plating wire rod, adopt with the iron pipe identical with iron wire material be shell, the flux-cored wire of filling solid lubricant particle in this iron pipe, according to circumstances filling iron particle further, if use this flux-cored wire to carry out arc spraying, then can form on the mother metal surface of plug the overlay film be made up of Fe oxide compound (ferric oxide), Fe and solid lubricant.Fe oxide compound in this overlay film is form the iron pipe of flux-cored wire and iron particle fusion, this molten pig in-flight oxidation to occur thus the material generated when arc spraying till arriving core rod base metal surface.Fe in overlay film is the material that molten pig keeps not arriving with not being oxidized core rod base metal surface awing.In addition, the solid lubricant in overlay film is the material on the solid lubricant particle arrival core rod base metal surface forming flux-cored wire.
The overlay film so formed by using the arc spraying of flux-cored wire contains to form the solid lubricant of solid lubricant particle for root of flux-cored wire, and therefore during pierced billet, oilness uprises.So the oilness of plug overlay film when pierced billet repeatedly of such band arc spraying overlay film is high, therefore stably improve the plug life-span.That is, solid lubricant particle is the specific particle contributing to improving the plug life-span.
The present invention is for complete based on the opinion shown in above-mentioned (1), (2).Optimal way below for the manufacture method of plug of the present invention is described.
< the 1st embodiment >
In the manufacture method of the plug of the 1st embodiment of the present invention, before the construction of arc spraying, shot-peening is implemented to the surface of plug.Thus, with by repeatedly for pierced billet, the plug that regenerates after reaching the life-span for object, the overlay film remaining in the pierced billet state of mandrel surface is removed and the mother metal of plug surface is exposed and core rod base metal surface is roughened into the concavo-convex of appropriateness.In addition, when with the plug of new production for object, core rod base metal surface is roughened into the concavo-convex of appropriateness.The reason of enforcement shot-peening like this be due to, if implement arc spraying to the concavo-convex core rod base metal surface without remaining overlay film, appropriateness, the adaptation of core rod base metal and overlay film improves.
Then, in the manufacture method of the plug of the 1st embodiment, the flux-cored wire taking iron as main component is carried out arc spraying as the mother metal surface of spraying plating wire rod to the plug implementing shot-peening, forms overlay film.
Fig. 1 is the cross-sectional view of the spraying plating wire rod used in the arc spraying in the manufacture method of the pierced billet plug of the 1st embodiment of the present invention.As shown in Figure 1, in the 1st embodiment, use flux-cored wire 1 as spraying plating wire rod.The shell of this flux-cored wire 1 is made up of iron pipe 2.
Low thermally conductive material particle 3 is filled with in the inside of iron pipe 2.Low thermally conductive material particle 3 has the characteristic lower than the thermal conductivity of ferric oxide, and the material that can not burn when arc spraying and disappear, such as, metallic particles, ceramic particle meet.Wherein, the zirconium white (ZrO that thermal conductivity is extremely low
2) particle is preferred.In addition, low thermally conductive material particle 3 is not limited in granular material, also comprises the material of powdery, staple fibre shape.It should be noted that, be ferric oxide (II) (FeO), ferric oxide (III) (Fe at this so-called ferric oxide
2o
3), ferric oxide (II, III) (Fe
3o
4) etc.
Except low thermally conductive material particle 3, iron particle 4 is filled also harmless in the inside of iron pipe 2.Iron particle 4 is also not limited only to granular material, also comprises the material of powdery, staple fibre shape.
By using the arc spraying of the flux-cored wire (spraying plating wire rod) 1 of this structure, thus can form on the mother metal surface of plug the overlay film be made up of Fe oxide compound (ferric oxide), Fe and low thermally conductive material.The plug of the band arc spraying overlay film of manufacture like this is owing to containing the low thermally conductive material lower than the thermal conductivity of Fe oxide compound in overlay film, even if therefore do not carry out thick-film, when pierced billet repeatedly, thermal insulation also uprises, and the stable raising in plug life-span becomes possibility.
At this, apply ZrO as low thermally conductive material particle 3
2during particle, preferably, iron pipe 2 is being comprised and low thermally conductive material particle 3 also has among the entirety of flux-cored wire 1 of iron particle 4, ZrO
2the ratio that particle occupies is 2.5 ~ 30.0 volume %.As confirmed in embodiment 1 described later, be cause ZrO
2when the ratio that particle occupies is less than 2.5 volume %, due to ZrO contained in the overlay film of plug
2quantity not sufficient, can not improve thermal insulation fully during pierced billet, the distortion of core rod base metal becomes remarkable, therefore become be unsuitable for recycling, the plug life-span can not stably improve.On the other hand, be cause ZrO
2when the ratio that particle occupies is more than 30.0 volume %, due to ZrO contained in the overlay film of plug
2amount excessive, the adaptation of core rod base metal and overlay film reduces and overlay film is peeled off ahead of time, core rod base metal melting loss, be therefore unsuitable for equally recycling.Be more preferably 5.0 ~ 30.0 volume %.
< the 2nd embodiment >
In the manufacture method of the plug of the 2nd embodiment of the present invention, in the same manner as above-mentioned 1st embodiment before the construction of arc spraying, shot-peening is implemented to the surface of plug.Then, the flux-cored wire taking iron as main component is carried out arc spraying as the mother metal surface of spraying plating wire rod to the plug implementing shot-peening, forms overlay film.But the flux-cored wire used in the 2nd embodiment is different in the following areas from the flux-cored wire of above-mentioned 1st embodiment.
Fig. 2 is the cross-sectional view of the spraying plating wire rod used in the arc spraying in the manufacture method of the pierced billet plug of the 2nd embodiment of the present invention.As shown in Figure 2, in the 2nd embodiment, use flux-cored wire 1 as spraying plating wire rod.The shell of this flux-cored wire 1 is made up of iron pipe 2.
The inside of iron pipe 2 is filled with solid lubricant particle 5.Solid lubricant particle 5 has the characteristic playing function when pierced billet as solid lubricant, and the material that can not burn when arc spraying and disappear, such as, metallic particles, ceramic particle meet.Wherein, boron nitride (BN) particle that preferred solid lubricity is extremely excellent.In addition, solid lubricant particle 5 is not limited in granular material, also comprises the material of powdery, staple fibre shape.
Except solid lubricant particle 5, iron particle 4 is filled also harmless in the inside of iron pipe 2.Iron particle 4 is also not limited only to granular material, also comprises the material of powdery, staple fibre shape.
By using the arc spraying of the flux-cored wire (spraying plating wire rod) 1 of this structure, thus can form on the mother metal surface of plug the overlay film be made up of Fe oxide compound (ferric oxide), Fe and solid lubricant.The plug of the band arc spraying overlay film of manufacture like this owing to comprising solid lubricant in overlay film, and therefore when pierced billet repeatedly, oilness uprises, the stable raising in plug life-span becomes possibility.
At this, when applying BN particle as solid lubricant particle 5, preferably, comprising iron pipe 2 and solid lubricant particle 5 also has among the entirety of flux-cored wire 1 of iron particle 4, the ratio that BN particle occupies is 5.0 ~ 20.0 volume %.As confirmed in embodiment 2 described later, be the ratio that occupies of cause BN particle less than 5.0 volume % time, due to the quantity not sufficient of BN contained in the overlay film of plug, oilness can not be improved fully during pierced billet, can not realize improving piercing efficiency fully, therefore the plug life-span can not stably improve.On the other hand, be the ratio that occupies of cause BN particle more than 20.0 volume % time, because the amount of BN contained in the overlay film of plug is excessive, therefore the adaptation of core rod base metal and overlay film reduces and overlay film is peeled off ahead of time, core rod base metal melting loss, therefore become and be unsuitable for recycling, the plug life-span can not stably improve equally.Be more preferably 7.5 ~ 20.0 volume %.
It should be noted that, as follows in the implication of this so-called piercing efficiency.During pierced billet, the speed (hereinafter referred to as " conveyance speed ") transporting steel billet is vertically determined by the rotating speed of piercer roll, but the conveyance speed of reality due to the friction resistance etc. of the plug that contacts with each other and steel billet impact and be slower than the theoretic conveyance speed calculated by the rotating speed of set piercer roll.Usually, their velocity ratio (=(actual conveyance speed)/(theoretic conveyance speed) × 100 [%]) is called " piercing efficiency ".Piercing efficiency is the index of oilness, and when it is high, not only the manufacture efficiency of roll piercing mill rises, and the time that plug contacts with steel billet is shortened, and therefore realizes plug life.
In addition, in the manufacture method of plug of the present invention, when utilizing arc spraying to form overlay film, can coating machine be made to carry out arc spraying while the slow mode movement away from making spraying plating distance expand gradually in the mother metal surface of plug.Thus, the overlay film that the ratio (hereinafter referred to as " oxide ratio ") core rod base metal being formed the region that Fe oxide compound occupies more closely increases more gradually apart from side, top layer.So be formed in low with the adjacency section oxide ratio of core rod base metal, when the overlay film that skin section oxide ratio is high, can guarantee thermal insulation and anti-burn-back in the skin section of overlay film and can guarantee in the adjacency section with core rod base metal adaptation in be useful.
Embodiment
In order to confirm effect of the present invention, manufacturing pierced billet plug, the plug of manufacture being installed on tapping machine, carrying out the test of pierced billet.This test conditions is as described below.
< embodiment 1 >
[test method]
(1) manufacture of plug
The hot working tool steel specified by JIS, as mother metal, prepares the plug that multiple maximum diameter is the shell shape of 147mm.After shot-peening is implemented to the surface of each plug, carry out using the arc spraying of the flux-cored wire shown in earlier figures 1 to the mother metal surface of each plug and form overlay film, the plug of fabricated ribbon arc spraying overlay film.In the process forming arc spraying overlay film, carry out arc spraying by being set to 200mm from coating machine at first to the spraying plating on core rod base metal surface distance, and make coating machine gradually away from, finally spraying plating distance is extended to 1000mm and carries out arc spraying.
Now, ZrO is adopted as the low thermally conductive material particle in flux-cored wire
2particle, uses this ZrO
2the flux-cored wire that the ratio that particle occupies changes as shown in following table 1.It should be noted that, according to ZrO in the iron pipe of flux-cored wire
2the ratio that particle occupies and and ZrO
2particle is together filled with iron particle.
Table 1
Note) stripping of "-" expression overlay film, core rod base metal melting loss
(2) pierced billet
Use above-mentioned each plug, pierced billet is repeatedly carried out to the following machined material (starting material) being heated to about 1200 DEG C, makes following hollow bloom.
The size of machined material: the round steel billet of diameter 191mm, length 2200mm
The material of machined material: 13%Cr steel
Hollow bloom: external diameter 196mm, wall thickness 16.82mm, length 6520mm
[evaluation method]
Every root plug carries out 10 times continuously repeatedly after pierced billet, checks the outward appearance of plug, investigate its surface texture, namely with or without core rod base metal with the stripping of overlay film melting loss.On this basis, the surface of plug is implemented to shot-peening, removed remaining overlay film, the then height (axial length) of measure-axis mother metal, investigate the deflection before relative to use, i.e. investigation and use the difference of the core rod base metal height of front and back.At this, in actually operating, be below 2.0mm by the management of the deflection of core rod base metal.Because when the deflection of core rod base metal is more than 2.0mm, becomes and be unsuitable for recycling.According to these situations, in this test, the average evaluation being below 2.0mm by the deflection of core rod base metal not melting loss, core rod base metal is good.
[test-results]
Test-results shown in table 1 and Fig. 3.Fig. 3 is by the ZrO in flux-cored wire as the test-results of embodiment 1
2the relation of the deflection of the ratio that particle occupies and core rod base metal arranges the figure obtained.By these results, situation is below shown.
ZrO is adopted as the low thermally conductive material particle in flux-cored wire
2particle, use this flux-cored wire formed arc spraying overlay film time, as test No.2 ~ 6, by flux-cored wire by ZrO
2particle is set to 2.5 more than volume %, thus suppresses the deflection of core rod base metal for below 2.0mm.This is the ZrO containing appropriate amount in the overlay film due to plug
2thermal insulation raising is brought.From such situation, use ZrO
2to be plug that the flux-cored wire of 2.5 more than volume % defines arc spraying overlay film be particle stablizes in the plug life-span and improve and be suitable for the plug that recycles.
But, as test No.7,8, use ZrO
2when particle forms arc spraying overlay film more than the flux-cored wire of 30.0 volume %, overlay film is peeled off ahead of time, core rod base metal melting loss.This is excessively containing ZrO in the overlay film due to plug
2though make thermal insulation improve but the adaptation of core rod base metal and overlay film reduces and causes.From such situation, for use ZrO
2particle defines the plug of arc spraying overlay film more than the flux-cored wire of 30.0 volume %, and the raising in plug life-span is unstable.
On the other hand, as test No.1, ZrO is used
2particle is the flux-cored wire of 0 volume % when forming arc spraying overlay film (with to use iron wire material to form the situation of arc spraying overlay film as disclosed in aforementioned patent literature 1 suitable), the far super 2.0mm of deflection of core rod base metal.This is not containing the ZrO that thermal conductivity is low in the overlay film due to plug
2and thermal insulation raising is caused.From such situation, for use ZrO
2particle defines the plug of arc spraying overlay film less than the flux-cored wire of 2.5 volume %, and the raising in plug life-span is also unstable.
< embodiment 2 >
[test method]
(1) manufacture of plug
The hot working tool steel specified by JIS, as mother metal, prepares the plug that multiple maximum diameter is the shell shape of 147mm.After shot-peening is implemented to the surface of each plug, carry out using the arc spraying of the flux-cored wire shown in earlier figures 2 to the mother metal surface of each plug and form overlay film, the plug of fabricated ribbon arc spraying overlay film.In the process forming arc spraying overlay film, carry out arc spraying by being set to 200mm from coating machine at first to the spraying plating on core rod base metal surface distance, and make coating machine gradually away from, finally spraying plating distance is extended to 1000mm and carries out arc spraying.
Now, adopt BN particle as the solid lubricant in flux-cored wire, use the flux-cored wire that the ratio occupied by this BN particle changes as shown in following table 2.It should be noted that, the ratio occupied according to BN particle in the iron pipe of flux-cored wire and be together filled with iron particle with BN particle.
Table 2
Note) stripping of "-" expression overlay film, core rod base metal melting loss
(2) pierced billet
Use above-mentioned each plug, pierced billet is repeatedly carried out to the following machined material (starting material) being heated to about 1200 DEG C, makes following hollow bloom.
The size of machined material: the round steel billet of diameter 191mm, length 2200mm
The material of machined material: 13%Cr steel
Hollow bloom: external diameter 196mm, wall thickness 16.82mm, length 6520mm
[evaluation method]
Investigate piercing efficiency when every root plug carries out pierced billet.For piercing efficiency, in actually operating using more than 70% as target, in this test, be good by the average evaluation exceeding this target.Corresponding, whenever terminating pierced billet and just check the outward appearance of plug, investigation overlay film peel off and plug is become can not use or melting loss or distortion occur in plug leading section time passage number of times, investigation complete the radical (number of times of boring a hole continuously) of the steel billet of continuous piercing.Number of times of this being bored a hole continuously was evaluated as the plug life-span.The evaluation in plug life-span is as follows: to define the suitable plug of the plug of arc spraying overlay film with using iron wire material as disclosed in aforementioned patent literature 1, namely to use BN particle to be that the flux-cored wire of 0 volume % defines the life-span of the plug of arc spraying overlay film as benchmark " 1 " as the test No.11 in above-mentioned table 2, carry out with the ratio in the life-span of each plug relative to benchmark " 1 " (hereinafter referred to as " plug life-span ratio ").
[test-results]
Test-results shown in table 2 and Fig. 4.Fig. 4 is that the ratio occupied by the BN particle in flux-cored wire as the test-results of embodiment 2 arranges with the relation of plug life-span ratio the figure obtained.By these results, situation is below shown.
BN particle is adopted, when using this flux-cored wire to form arc spraying overlay film as the solid lubricant in flux-cored wire, as tested No.13 ~ 17, by BN particle being set to 5.0 more than volume % in flux-cored wire, thus guarantee that piercing efficiency is more than 70%, confirm the rising of plug life-span ratio.This is that the BN containing appropriate amount in the overlay film due to plug makes oilness raising bring.From such situation, for using BN particle to be the plug that the flux-cored wire of 5.0 more than volume % defines arc spraying overlay film, the plug life-span is stable improves.
But as test No.18 ~ 20, when using BN particle to form arc spraying overlay film more than the flux-cored wire of 20.0 volume %, overlay film is peeled off ahead of time, core rod base metal melting loss.Though this excessively makes oilness improve containing BN in the overlay film due to plug but the adaptation of core rod base metal and overlay film reduces and causes.From such situation, use BN particle is defined to the plug of arc spraying overlay film more than the flux-cored wire of 20.0 volume %, the raising in plug life-span is unstable.
On the other hand, as such in test No.11,12, when using the flux-cored wire formation arc spraying overlay film of BN particle less than 5.0 volume % (comprising 0 volume %), piercing efficiency does not reach 70%, the rising of plug life-span ratio is little.Even if this be in the overlay film due to plug containing the BN played a role as solid lubricant or containing but its quantity not sufficient and that oilness is improved fully is caused.From such situation, use BN particle is defined to the plug of arc spraying overlay film less than the flux-cored wire of 5.0 volume %, the raising in plug life-span is also unstable.
utilizability in industry
The present invention can effectively utilize in the manufacture of the weldless steel tube of high quality steel.
description of reference numerals
1: flux-cored wire (spraying plating wire rod), 2: iron pipe,
3: low thermally conductive material particle, 4: iron particle, 5: solid lubricant particle
Claims (7)
1. a manufacture method for pierced billet plug, is characterized in that, it comprises for the manufacture method for the manufacture of the plug used in the roll piercing mill of weldless steel tube, the manufacture method of this pierced billet plug:
The surface of plug is implemented to the blasting process of shot-peening; With
By the spraying plating of spraying plating wire arc to implement shot-peening plug mother metal surface and form the arc spraying operation of overlay film,
In arc spraying operation, as spraying plating wire rod, among the specific particle being used in iron particle and contributing to improving the plug life-span, at least specific particle flux-cored wire that is filled into the inside of iron pipe carries out arc spraying, forms the overlay film be made up of ferric oxide, Fe and specific particle.
2. the manufacture method of pierced billet plug according to claim 1, is characterized in that, described specific particle is the low thermally conductive material particle with the characteristic lower than the thermal conductivity of ferric oxide.
3. the manufacture method of pierced billet plug according to claim 2, is characterized in that, described low thermally conductive material particle is ZrO
2particle.
4. the manufacture method of pierced billet plug according to claim 3, is characterized in that, ZrO described in described flux-cored wire
2the ratio that particle occupies is 2.5 ~ 30.0 volume %.
5. the manufacture method of pierced billet plug according to claim 1, is characterized in that, described specific particle is solid lubricant particle.
6. the manufacture method of pierced billet plug according to claim 5, is characterized in that, described solid lubricant particle is BN particle.
7. the manufacture method of pierced billet plug according to claim 6, is characterized in that, the ratio that described in described flux-cored wire, BN particle occupies is 5.0 ~ 20.0 volume %.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012128255 | 2012-06-05 | ||
| JP2012-128175 | 2012-06-05 | ||
| JP2012128175 | 2012-06-05 | ||
| JP2012-128255 | 2012-06-05 | ||
| PCT/JP2013/002657 WO2013183213A1 (en) | 2012-06-05 | 2013-04-19 | Manufacturing method for piercing plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104364413A true CN104364413A (en) | 2015-02-18 |
| CN104364413B CN104364413B (en) | 2016-04-27 |
Family
ID=49711623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380029651.7A Expired - Fee Related CN104364413B (en) | 2012-06-05 | 2013-04-19 | The manufacture method of pierced billet plug |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20150184276A1 (en) |
| EP (1) | EP2857545B1 (en) |
| CN (1) | CN104364413B (en) |
| AR (1) | AR091250A1 (en) |
| CA (1) | CA2866802C (en) |
| MX (1) | MX2014012498A (en) |
| RU (1) | RU2598414C2 (en) |
| WO (1) | WO2013183213A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5273272B1 (en) * | 2012-04-25 | 2013-08-28 | 新日鐵住金株式会社 | Manufacturing method of piercing and rolling plug |
| US10974317B2 (en) * | 2016-07-22 | 2021-04-13 | Emerson Climate Technologies, Inc. | Controlled-dispersion of solid lubricious particles in a metallic alloy matrix |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393677A (en) * | 1979-12-25 | 1983-07-19 | Nippon Kokan Kabushiki Kaisha | Plugs for use in piercing and elongating mills |
| CN1858293A (en) * | 2006-06-09 | 2006-11-08 | 北京工业大学 | Nano micrometer modefied wear resistant erosion resistant thermal coated tubular wire |
| CN101848777A (en) * | 2007-11-01 | 2010-09-29 | 住友金属工业株式会社 | Piercing plug, method for regenerating piercing plug, and regeneration facility line for piercing plug |
| CN102242329A (en) * | 2011-06-07 | 2011-11-16 | 昆山市瑞捷精密模具有限公司 | Iron-based die with function of self-lubricating manufactured by adopting electric arc spraying |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332752A (en) * | 1963-08-22 | 1967-07-25 | Raybestos Manhattan Inc | Composite flame spraying wire |
| JPH0633445B2 (en) * | 1986-07-11 | 1994-05-02 | 川崎製鉄株式会社 | Heat resistant alloy for piercing plugs |
| SU1615197A1 (en) * | 1988-08-01 | 1990-12-23 | Руставский металлургический завод | Method of producing mandrels for piercing mills |
| US5294462A (en) * | 1990-11-08 | 1994-03-15 | Air Products And Chemicals, Inc. | Electric arc spray coating with cored wire |
| US5194304A (en) * | 1992-07-07 | 1993-03-16 | Ford Motor Company | Thermally spraying metal/solid libricant composites using wire feedstock |
| US5778714A (en) * | 1995-05-19 | 1998-07-14 | Nkk Corporation | Method for manufacturing seamless pipe |
| DE10334701A1 (en) * | 2003-07-30 | 2005-02-24 | Daimlerchrysler Ag | Thermally sprayed cylinder liner for internal combustion engines is made from an iron-based alloy containing dispersed friction- and wear-reducing particles made from a metal alloy of aluminum, copper, zinc, tin and/or molybdenum |
| US7803237B2 (en) * | 2005-07-20 | 2010-09-28 | Damascus Steel Casting Company | Nickel-base alloy and articles made therefrom |
| DE102008024226A1 (en) * | 2008-05-19 | 2009-11-26 | Daimler Ag | Method for coating of metal parts with a passivation oxide layer through electric arc wire spraying, comprises providing initial component of coating materials by filler wire for electric arc wire spraying |
| JP5273272B1 (en) * | 2012-04-25 | 2013-08-28 | 新日鐵住金株式会社 | Manufacturing method of piercing and rolling plug |
-
2013
- 2013-04-19 US US14/403,612 patent/US20150184276A1/en not_active Abandoned
- 2013-04-19 EP EP13800967.5A patent/EP2857545B1/en not_active Not-in-force
- 2013-04-19 WO PCT/JP2013/002657 patent/WO2013183213A1/en active Application Filing
- 2013-04-19 RU RU2014153911/02A patent/RU2598414C2/en not_active IP Right Cessation
- 2013-04-19 CN CN201380029651.7A patent/CN104364413B/en not_active Expired - Fee Related
- 2013-04-19 CA CA2866802A patent/CA2866802C/en not_active Expired - Fee Related
- 2013-04-19 MX MX2014012498A patent/MX2014012498A/en unknown
- 2013-06-03 AR ARP130101946 patent/AR091250A1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393677A (en) * | 1979-12-25 | 1983-07-19 | Nippon Kokan Kabushiki Kaisha | Plugs for use in piercing and elongating mills |
| CN1858293A (en) * | 2006-06-09 | 2006-11-08 | 北京工业大学 | Nano micrometer modefied wear resistant erosion resistant thermal coated tubular wire |
| CN101848777A (en) * | 2007-11-01 | 2010-09-29 | 住友金属工业株式会社 | Piercing plug, method for regenerating piercing plug, and regeneration facility line for piercing plug |
| CN102242329A (en) * | 2011-06-07 | 2011-11-16 | 昆山市瑞捷精密模具有限公司 | Iron-based die with function of self-lubricating manufactured by adopting electric arc spraying |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2866802A1 (en) | 2013-12-12 |
| CA2866802C (en) | 2016-10-25 |
| US20150184276A1 (en) | 2015-07-02 |
| RU2014153911A (en) | 2016-07-27 |
| AR091250A1 (en) | 2015-01-21 |
| RU2598414C2 (en) | 2016-09-27 |
| WO2013183213A1 (en) | 2013-12-12 |
| MX2014012498A (en) | 2015-01-15 |
| EP2857545B1 (en) | 2018-06-13 |
| CN104364413B (en) | 2016-04-27 |
| EP2857545A1 (en) | 2015-04-08 |
| EP2857545A4 (en) | 2016-02-24 |
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