CN110586653A - Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe - Google Patents
Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe Download PDFInfo
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- CN110586653A CN110586653A CN201911024151.XA CN201911024151A CN110586653A CN 110586653 A CN110586653 A CN 110586653A CN 201911024151 A CN201911024151 A CN 201911024151A CN 110586653 A CN110586653 A CN 110586653A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 114
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 230000001580 bacterial effect Effects 0.000 claims description 3
- 235000010216 calcium carbonate Nutrition 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 235000015320 potassium carbonate Nutrition 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 abstract description 11
- 239000001301 oxygen Substances 0.000 abstract description 11
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001257 hydrogen Substances 0.000 abstract description 5
- 239000010936 titanium Substances 0.000 abstract description 5
- 229910052719 titanium Inorganic materials 0.000 abstract description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001192 hot extrusion Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention relates to the technical field of titanium alloy seamless pipes and discloses a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless pipe, which mainly comprises the following steps: A. firstly, removing impurities in a titanium alloy raw material by an operator by using a plug net; B. secondly, preparing the titanium alloy raw material subjected to impurity removal into a titanium alloy blank; C. then, pouring the titanium alloy blank into a titanium alloy seamless pipe mold; D. then, only the titanium alloy seamless pipe mold is placed in the annular furnace for heating; E. grabbing the heated titanium alloy seamless tube into a cooling device through a conveying device; F. heating and cooling the titanium alloy ingredients, and then demoulding to generate a solid titanium alloy cylinder; G. the titanium alloy cylinder is then fixed by a machining lathe. The invention solves the problems that titanium reacts with carbon, hydrogen, nitrogen and oxygen at high temperature, so that the organizational structure of the titanium is changed, the physicochemical characteristics of the titanium are influenced, and the use requirement is difficult to achieve.
Description
Technical Field
The invention relates to the technical field of titanium alloy seamless pipes, in particular to a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless pipe.
Background
With the development of science and technology, people have higher utilization rate of new energy and materials, titanium alloy is favored by various fields due to the excellent characteristics of small density, high specific strength, good fatigue resistance, good crack expansion resistance, strong corrosion resistance, good welding performance and the like, the market of titanium alloy seamless pipes is also larger and larger with the continuous development of titanium alloy processing technology, the traditional production process of the titanium alloy seamless pipes comprises two processes, namely a hot extrusion cold drawing process and a hot rolling process, the hot extrusion cold drawing process enables the product to be shorter (less than 6 meters) and lower (less than 50%) in product length, the hot rolling process generally needs to roll and perforate a blank in an inclined way after heating, but because titanium reacts with carbon, hydrogen, nitrogen and oxygen at high temperature, the tissue structure of the titanium alloy is changed, the physical and chemical properties of the titanium alloy are influenced, and the use requirements are difficult to meet.
Disclosure of Invention
The invention aims to provide a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless tube, which achieves the aim of preventing titanium from reacting with carbon, hydrogen, nitrogen and oxygen at high temperature by placing titanium alloy ingredients in a die and taking argon as a fuel supply raw material in an annular furnace, so that the organizational structure of the titanium alloy seamless tube is stable and the use requirement is met.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless tube mainly comprises the following steps:
A. firstly, removing impurities in a titanium alloy raw material by an operator by using a plug net;
B. secondly, preparing the titanium alloy raw material subjected to impurity removal into a titanium alloy blank;
C. then, pouring the titanium alloy blank into a titanium alloy seamless pipe mold;
D. then, only the titanium alloy seamless pipe mold is placed in the annular furnace for heating;
E. grabbing the heated titanium alloy seamless tube into a cooling device through a conveying device;
F. heating and cooling the titanium alloy ingredients, and then demoulding to generate a solid titanium alloy cylinder;
G. fixing the titanium alloy cylinder by a processing lathe, and drilling the central part of the titanium alloy cylinder by using a bacterial type puncher until the titanium alloy cylinder is drilled through;
H. carrying out primary finish rolling by adopting a high-precision multifunctional pressing machine;
I. straightening the titanium alloy seamless tube by using a straightening machine;
J. coating the outer wall of the straightened titanium alloy seamless tube;
K. then, a dryer is utilized to promote the surface coating of the titanium alloy seamless tube to be quickly dried;
l, sawing according to the length of the titanium alloy seamless pipe required by the market;
m, polishing and coloring the sawed part through a polishing sheet;
and N, finally, only packing and warehousing the finished titanium alloy seamless tube.
Preferably, the reducing gas in the annular furnace is argon.
Preferably, the coating is prepared from powder and slurry, wherein the powder is prepared from the following components in parts by weight:
SiO2 20～45；
MoO3 0～3；
Al2O3 2～5；
Li2CO3 5～10；
H2BO3 20～40；
TiO2 0～5；
CaCO3 3～10；
ZrO2 5～10；
Na2CO3 5～10；
MGO 0～5；
K2CO3 5～15；
the preparation of the material adopts a sintering method: proportioning according to parts by weight, ball-milling and mixing, melting at 1350 ℃, ball-milling into powder after water quenching, drying, sieving with a 200-mesh sieve, and packaging.
Preferably, the heating time of each section in the sectional heating process of the annular furnace is correspondingly adjusted according to the size of the titanium alloy seamless pipe mold.
Preferably, the inner diameter of the mushroom-type perforator is adjusted according to the outer diameter of the titanium alloy seamless pipe during perforation.
Preferably, the deformation resistance K of the titanium alloy pipe blank discharged after heating is 65-120 MPa.
The invention provides a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless pipe. The method has the following beneficial effects:
(1) the invention reduces deformation resistance by strictly controlling the rolling temperature through narrow temperature range of titanium alloy rolling, greatly reduces the unit power consumption, saves the cost, and simultaneously improves the yield of the titanium alloy pipe.
(2) The titanium alloy is placed in the die, and the argon is used as a fuel supply raw material in the annular furnace, so that the technical problems that the titanium alloy blank is easy to react with oxygen, nitrogen, carbon, iron and the like at high temperature and is easy to absorb hydrogen are well solved, and the rolling is not influenced; the inclined grate bars and the material turning device between the perforating machine and the pipe mill in the prior art are changed into the quick conveying device, and the quick conveying device is arranged between the sizing mill and the straightening machine, so that the transfer time is shortened, and the cooling of the capillary is reduced.
(3) According to the invention, through 4 aspects of influence of the change of impurity content of a titanium alloy ingot on the processing performance of the pipe, influence of inclined rolling perforation heating speeds of different temperature zones on the surface oxidation degree of the pipe, selection of the optimal rolling speed of three-roll cold rolling and determination of the optimal straightening mode of a finished pipe, the production process of the thin-wall large-caliber Gr12 titanium alloy ultralong seamless pipe is researched, and the result shows that the chemical components of the Gr12 titanium alloy ingot are strictly controlled, so that N is less than or equal to 0.01%, C is less than or equal to 0.03%, H is less than or equal to 0.005%, Fe is less than or equal to 0.08%, 0 is less than or equal to 0.08%, the cold processing performance of the alloy can be ensured, and the thin-wall large; different temperature zones during cross-piercing heating are selected to have different heating speeds which are lower than 650 ℃, the oxidation layer is compact, the oxidation speed is slow, oxygen and nitrogen are not easy to be absorbed, the temperature rise speed is slow, the oxidation layer starts to be loose at 5-5.5 ℃ per minute and at 650-820 ℃, the oxidation speed is accelerated, oxygen and nitrogen are easy to be absorbed, and the temperature rise speed is slightly higher and is 6.8-7.2 ℃ per minute; at the temperature of 820 ℃ or above, the oxidation layer is more loose, the oxidation speed is higher, oxygen and nitrogen can be absorbed more easily, the surface is more oxidized seriously, the temperature rise speed is further increased to 7.6-8.5 ℃, and the pipe is prevented from being oxidized seriously; the suitable rolling speed of the three-roller cold rolling is 60-70 r/min; the best straightening mode of the finished pipe is to firstly carry out pre-flattening to ensure that the straightness is not less than 2mm/m, and then carry out fine straightening on a straightening machine, so that the product pipe cannot be corrected to be concave or elliptical.
(4) According to the invention, the inner diameter of the titanium alloy seamless pipe is always kept to be changed along with the change of the outer diameter in the production process of the titanium alloy seamless pipe, and the length of the titanium alloy seamless pipe is sawed according to the length required by the market, so that the appearance and color of the titanium alloy seamless pipe can be changed according to the market requirement.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a technical solution: a production process of a hot-rolled large-caliber thin-wall titanium alloy seamless tube mainly comprises the following steps:
A. firstly, removing impurities in a titanium alloy raw material by an operator by using a plug net;
B. secondly, preparing the titanium alloy raw material subjected to impurity removal into a titanium alloy blank;
C. then, pouring the titanium alloy blank into a titanium alloy seamless pipe mold;
D. then, only the titanium alloy seamless pipe mold is placed in the annular furnace for heating;
E. grabbing the heated titanium alloy seamless tube into a cooling device through a conveying device;
F. heating and cooling the titanium alloy ingredients, and then demoulding to generate a solid titanium alloy cylinder;
G. fixing the titanium alloy cylinder by a processing lathe, and drilling the central part of the titanium alloy cylinder by using a bacterial type puncher until the titanium alloy cylinder is drilled through;
H. carrying out primary finish rolling by adopting a high-precision multifunctional pressing machine;
I. straightening the titanium alloy seamless tube by using a straightening machine;
J. coating the outer wall of the straightened titanium alloy seamless tube;
K. then, a dryer is utilized to promote the surface coating of the titanium alloy seamless tube to be quickly dried;
l, sawing according to the length of the titanium alloy seamless pipe required by the market;
m, polishing and coloring the sawed part through a polishing sheet;
and N, finally, only packing and warehousing the finished titanium alloy seamless tube.
Further, the reducing gas in the annular furnace is argon.
Further, the coating is prepared from powder and slurry, wherein the powder is prepared from the following components in parts by weight:
SiO2 20～45；
MoO3 0～3；
Al2O3 2～5；
Li2CO3 5～10；
H2BO3 20～40；
TiO2 0～5；
CaCO3 3～10；
ZrO2 5～10；
Na2CO3 5～10；
MGO 0～5；
K2CO3 5～15；
the preparation of the material adopts a sintering method: proportioning according to parts by weight, ball-milling and mixing, melting at 1350 ℃, ball-milling into powder after water quenching, drying, sieving with a 200-mesh sieve, and packaging.
Further, the heating time of each section in the sectional heating process of the annular furnace is correspondingly adjusted according to the size of the titanium alloy seamless pipe mold.
Furthermore, the inner diameter of the bacteria type perforator is adjusted according to the outer diameter of the titanium alloy seamless pipe during punching.
Further, the deformation resistance K of the titanium alloy tube blank discharged after heating is 65-120 MPa.
In conclusion, the invention has the advantages that the titanium alloy rolling deformation temperature interval is narrow, the rolling temperature is strictly controlled to reduce the deformation resistance, the unit power consumption is greatly reduced, the cost is saved, the yield of the titanium alloy pipe is improved, the mushroom-type puncher adopts the upper guide wheel and the lower guide wheel to replace the upper guide plate and the lower guide plate adopted by the traditional puncher, the metal adhesion phenomenon generated by the friction between the titanium alloy and a rolling tool is effectively solved, the consumption of the rolling tool is reduced, the perforated capillary pipe is subjected to wall reduction extension by one step by adopting a high-precision multifunctional press, the rolling process parameters such as the rolling angle, the feeding angle and the like are flexibly and reliably adjusted, the technical problems that the titanium alloy blank is easy to react with oxygen, nitrogen, carbon, iron and the like and is easy to absorb hydrogen at high temperature are well solved by placing the titanium alloy material in the die and taking argon as a fuel supply material in the annular furnace, the rolling is not influenced; the invention researches the production process of the thin-wall large-caliber Gr12 titanium alloy ultra-long seamless tube by 4 aspects of the influence of the impurity content change of a titanium alloy cast ingot on the tube processing performance, the influence of the inclined rolling perforation heating speed of different temperature regions on the tube surface oxidation degree, the selection of the optimal rolling speed of three-roll cold rolling and the determination of the optimal straightening mode of a finished tube, and the results show that the chemical components of the Gr12 titanium alloy cast ingot are strictly controlled to ensure that the N is less than or equal to 0.01 percent, the C is less than or equal to 0.03 percent, the H is less than or equal to 0.005 percent, the Fe is less than or equal to 0.08 percent and the 0 is less than or equal to 0.08 percent, the cold processing performance of the alloy can be ensured, and the thin-wall large-caliber ultra-long seamless tube is rolled; different temperature zones during cross-piercing heating are selected to have different heating speeds which are lower than 650 ℃, the oxidation layer is compact, the oxidation speed is slow, oxygen and nitrogen are not easy to be absorbed, the temperature rise speed is slow, the oxidation layer starts to be loose at 5-5.5 ℃ per minute and at 650-820 ℃, the oxidation speed is accelerated, oxygen and nitrogen are easy to be absorbed, and the temperature rise speed is slightly higher and is 6.8-7.2 ℃ per minute; at the temperature of 820 ℃ or above, the oxidation layer is more loose, the oxidation speed is higher, oxygen and nitrogen can be absorbed more easily, the surface is more oxidized seriously, the temperature rise speed is further increased to 7.6-8.5 ℃, and the pipe is prevented from being oxidized seriously; the suitable rolling speed of the three-roller cold rolling is 60-70 r/min; the best straightening mode of the finished pipe is to perform pre-flattening to ensure that the straightness is less than 2mm/m, and then perform fine straightening on a straightening machine, so that the pipe cannot be corrected to be concave or elliptical.
Claims (6)
1. A production process of a hot-rolled large-caliber thin-wall titanium alloy seamless tube is characterized by comprising the following steps: the technological operation process mainly comprises the following steps:
A. firstly, removing impurities in a titanium alloy raw material by an operator by using a plug net;
B. secondly, preparing the titanium alloy raw material subjected to impurity removal into a titanium alloy blank;
C. then, pouring the titanium alloy blank into a titanium alloy seamless pipe mold;
D. then, only the titanium alloy seamless pipe mold is placed in the annular furnace for heating;
E. grabbing the heated titanium alloy seamless tube into a cooling device through a conveying device;
F. heating and cooling the titanium alloy ingredients, and then demoulding to generate a solid titanium alloy cylinder;
G. fixing the titanium alloy cylinder by a processing lathe, and drilling the central part of the titanium alloy cylinder by using a bacterial type puncher until the titanium alloy cylinder is drilled through;
H. carrying out primary finish rolling by adopting a high-precision multifunctional pressing machine;
I. straightening the titanium alloy seamless tube by using a straightening machine;
J. coating the outer wall of the straightened titanium alloy seamless tube;
K. then, a dryer is utilized to promote the surface coating of the titanium alloy seamless tube to be quickly dried;
l, sawing according to the length of the titanium alloy seamless pipe required by the market;
m, polishing and coloring the sawed part through a polishing sheet;
and N, finally, only packing and warehousing the finished titanium alloy seamless tube.
2. The production process of the hot-rolled large-caliber thin-wall titanium alloy seamless tube according to claim 1, characterized in that: the reducing gas in the annular furnace is argon.
3. The production process of the hot-rolled large-caliber thin-wall titanium alloy seamless tube according to claim 1, characterized in that: the coating is prepared from powder and slurry, wherein the powder is prepared from the following components in parts by weight:
SiO2 20～45；
MoO3 0～3；
Al2O3 2～5；
Li2CO3 5～10；
H2BO3 20～40；
TiO2 0～5；
CaCO3 3～10；
ZrO2 5～10；
Na2CO3 5～10；
MGO 0～5；
K2CO3 5～15；
the preparation of the material adopts a sintering method: proportioning according to parts by weight, ball-milling and mixing, melting at 1350 ℃, ball-milling into powder after water quenching, drying, sieving with a 200-mesh sieve, and packaging.
4. The production process of the hot-rolled large-caliber thin-wall titanium alloy seamless tube according to claim 1, characterized in that: and the heating time of each section in the sectional heating process of the annular furnace is correspondingly adjusted according to the size of the titanium alloy seamless pipe mold.
5. The production process of the hot-rolled large-caliber thin-wall titanium alloy seamless tube according to claim 1, characterized in that: when the bacteria type perforator punches the holes, the inner diameter of the titanium alloy seamless pipe is adjusted according to the corresponding outer diameter of the titanium alloy seamless pipe.
6. The production process of the hot-rolled large-caliber thin-wall titanium alloy seamless tube according to claim 1, characterized in that: the deformation resistance K of the titanium alloy tube blank discharged after heating is 65-120 MPa.
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| CN201911024151.XA CN110586653A (en) | 2019-10-25 | 2019-10-25 | Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe |
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| CN201911024151.XA CN110586653A (en) | 2019-10-25 | 2019-10-25 | Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115301758A (en) * | 2022-08-11 | 2022-11-08 | 索罗曼(常州)合金新材料有限公司 | Production process of large-caliber thin-wall titanium alloy seamless pipe |
| CN115383085A (en) * | 2022-08-17 | 2022-11-25 | 鑫鹏源智能装备集团有限公司 | Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002113507A (en) * | 2000-10-05 | 2002-04-16 | Sumitomo Metal Ind Ltd | Plug for piercing seamless steel tube and method for manufacturing seamless steel tube |
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| CN115383085A (en) * | 2022-08-17 | 2022-11-25 | 鑫鹏源智能装备集团有限公司 | Production process of hot-rolled large-diameter thin-wall titanium alloy seamless pipe |
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Application publication date: 20191220 |