CN101708511B - Method for manufacturing pure titanium seamless tubes - Google Patents

Method for manufacturing pure titanium seamless tubes Download PDF

Info

Publication number
CN101708511B
CN101708511B CN2007100507707A CN200710050770A CN101708511B CN 101708511 B CN101708511 B CN 101708511B CN 2007100507707 A CN2007100507707 A CN 2007100507707A CN 200710050770 A CN200710050770 A CN 200710050770A CN 101708511 B CN101708511 B CN 101708511B
Authority
CN
China
Prior art keywords
finished
rolling
roll
pure titanium
seamless tubes
Prior art date
Application number
CN2007100507707A
Other languages
Chinese (zh)
Other versions
CN101708511A (en
Inventor
王怀柳
周茂华
李守军
刘刚
王远明
邝素军
石军
李洪东
Original Assignee
攀钢集团四川长城特殊钢有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 攀钢集团四川长城特殊钢有限责任公司 filed Critical 攀钢集团四川长城特殊钢有限责任公司
Priority to CN2007100507707A priority Critical patent/CN101708511B/en
Publication of CN101708511A publication Critical patent/CN101708511A/en
Application granted granted Critical
Publication of CN101708511B publication Critical patent/CN101708511B/en

Links

Abstract

The invention relates to a method for manufacturing pure titanium seamless tubes. The method is characterized by comprising the following steps of: preparing tube blank bars; machining the tube blank bars; diagonally rolling and punching holes: heating blank to 700 to 980 DEG C, punching holes once or twice by utilizing a two-roll diagonally rolling mill group, wherein molybdenum mandrels or water-cooled mandrels are utilized, the inclined angle of punching roll is 8 degrees, the number of revolutions of the roll is 40 to 90 basic speed to 195 r/min; preparing the pierced billet after punching hole, wherein the specifications of the pierced billet are that the outside diameter is phi 72 to phi 125mm,the wall thickness is 5 to 20mm, and the length is; carrying out cold rolling; and carrying out heat treatment on finished product, detecting performance and entering warehouse. The invention has the characteristics of high production efficiency, low production cost, high material yield, short production period, low device investment, better product quality, and the like. The produced pure titanium seamless tubes have good quality, the mechanical properties accord with state requirements, and the pure titanium seamless tubes can meet the need for large-scale industrial production.

Description

The manufacture method of pure titanium seamless tubes

Technical field

The invention belongs to the manufacturing of titanium tubing, relate to a kind of manufacture method of pure titanium seamless tubes.Mainly be applicable to roll piercing+cold rolling production pure titanium seamless tubes material.

Background technology

Titanium or titanium alloy is emerging 26S Proteasome Structure and Function material, has that proportion strength ratio height, thermal coefficient of expansion are little, a plurality of advantages such as good corrosion resistance, high-temperature behavior, low-temperature flexibility and low-temperature superconducting function admirable.In recent years, be used widely at civil areas such as Aero-Space, war industry and chemical industry, oil, ocean, physical culture, and be called as on " the 3rd metal " after iron, aluminium, " space metal ", " marine metal " are otherwise known as.

Along with Chinese economic development, the pure titanium seamless tubes material that proportion is little, corrosion resistance is good is also used in fields such as oil, chemical industry in succession, and therefore the demand to the pure titanium seamless tubes material increases the main dependence on import of pure titanium seamless tubes material of domestic use in recent years year by year.In the prior art, the method of making pure titanium pipe mainly is to adopt extruding+cold-rolling practice, this method technology is grasped easily, but the technological process of extrusion is more, it is long particularly to produce the ingot blank production process, excellent base is wanted peeling and bored big, the general extrusion bar rate of centre pilot hole, loss is 75% only, and production efficiency is low, the cost height, investment is big, metal and tool and mould consumption are bigger, is difficult to satisfy the large-scale industrial production needs.

Summary of the invention

Purpose of the present invention is intended to overcome above-mentioned deficiency of the prior art, a kind of with short production cycle, production efficiency and lumber recovery height is provided, can reduces production costs, can satisfy the manufacture method of the pure titanium seamless tubes of large-scale industrial production needs significantly.

The technological process of manufacture method of the present invention is mainly: roll (forging) rod → sawing → centering → car light → heating → roll piercing → reconditioning → cold rolling → degreasing → annealing → pickling → aligning → cold rolling (being circulated to finished product) → finished product heat treatment → pickling → aligning → flaw detection → cleaning → check → warehouse-in.

Content of the present invention is: a kind of manufacture method of pure titanium seamless tubes is characterized in that comprising the following steps:

A, preparation tube blank bar material: it is finished product titanium ingot that titanium sponge is smelted through vacuum consumable electrode arc furnace, becomes tube blank bar material through forging (rolling) again, and the diameter of tube blank bar material is φ 50~φ 130mm;

B, tube blank bar material machined: it is the blank of 650~4500mm that tube blank bar material sawing (adopting abrasive machine etc.) is become length; With horizontal centring machine centering, its internal point scope is at φ 18 ± 0.5~φ 30 ± 0.5mm then; And then with peeling locomotive light blank surface defective;

C, roll piercing: with blank heating to 700~980 ℃, carry out 1~2 perforation with the two-roll oblique rolling mill group, use molybdenum plug or water-cooled top, perforation roll inclination angle is that 8 °, roll revolution are 40~90 basic speed~195r/min, promptly make hollow forging after the perforation, hollow forging specification external diameter is that φ 72~φ 125mm, wall thickness are that 5~20mm, length are 1500~6000mm;

D, cold rolling: the waste tube outer surface that makes after the roll piercing is carried out reconditioning, adopt two cold mill groups, multiple rollers cold calender group, KPW25 milling train, SWK75 milling train or HPT160 mill milling (promptly cold rolling) then, whenever finish once rolling after again through degreasing, annealing, pickling, straightening processing, circulate rolling like this and handle after promptly make finished product; Circulate rolling and handle in the semi-finished product annealing temperature: 750~850 ℃+air cooling, time 20~100min;

E, finished product heat treatment and service check, warehouse-in: with finished product heat treatment, the annealing temperature that makes: 700~800 ℃+air cooling, time 20~100min; Again by specification requirement detect a flaw, service check, warehouse-in; Trimmed size is external diameter φ 10.0~φ 89.0 * wall thickness 1.0~16.0mm.

In the content of the present invention: the described two cold mill groups of step (d) can be LG80, LG55 or LG30 two cold mill groups.

In the content of the present invention: the described multiple rollers cold calender group of step (d) can be LD60, LD30 or LD15 multiple rollers cold calender group.

In the content of the present invention:: the described titanium sponge of step (a) is with one-level or secondary titanium sponge.

Compared with prior art, the present invention has following characteristics:

(1) technological process is simpler, and the production cycle, whole efficiency wanted high by 30% than extrusion;

(2) to have only peeling loss, the lumber recovery of perforation be 90% for blank processing, the lumber recovery height; Production process is less, the production efficiency height; Can reduce production costs significantly;

(3) production equipment and lumber recovery satisfy the condition that industrial scale is produced pure titanium pipe, can satisfy the needs of large-scale industrial production, good quality of product, pure titanium pipe surface quality is good, every mechanical performance index all meets GB/T3624-95 or GB/T3625-95 requirement, satisfy technical standard fully, practical;

(4) adopt the pure titanium seamless tubes of manufacturing of the present invention can reach following index:

1. hollow forging and finished product mechanical properties of tubular goods

φ 76 * 5mm is taken a sample its mechanical property such as table 1 after goods and the heat treatment of φ 25 * 1.5mm production tube.As shown in Table 1, the mechanical property of hollow forging and finished product tubing all meets the requirement of GB/T3624-1995.

Table 1: hollow forging and finished product mechanical properties of tubular goods

Specification σb(MPa) σr0.2(MPa) δ5(%) GB/T3624-1995 280~420 ≥250 ≥20 Φ 76 * 5 (air cooling) 365 --- 39 Φ 76 * 5 (water-cooled) 385 --- 35 Φ25×1.5 420 290 36.5 410 265 40

2. flaring test

φ 25 * 1.5mm production tube is pressed the GB/T3624-1995 check, and is qualified.

3. flattening test

φ 25 * 1.5mm production tube is pressed the GB/T3624-1995 check, and is qualified.

4. flaw detection

φ 25 * 1.5mm production tube is by the GB/T3624-1995 requirement, and is qualified.

5. tissue and clarity check

The clarity photograph of the pure titanium pipe of φ 25 * 1.5mm finished product is seen accompanying drawing 1;

The metallographic structure photograph of the pure titanium pipe of φ 25 * 1.5mm finished product is seen accompanying drawing 2.

Can find out that from accompanying drawing 1 the pure titanium pipe of φ 25 * 1.5mm finished product is not seen obviously and is mingled with; Find out from Fig. 2 is attached, finished product tubing even tissue, and crystal grain is equiax crystal.

Description of drawings

Fig. 1 is an embodiment of the invention clarity photograph;

Fig. 2, Fig. 3 embodiment of the invention metallographic structure photograph.

The specific embodiment

Below by embodiment the present invention is further described:

The technological process of embodiment of the invention manufacture method is mainly: roll (forging) rod → sawing → centering → car light → heating → roll piercing → reconditioning → cold rolling → degreasing → annealing → pickling → aligning → cold rolling (being circulated to finished product) → finished product heat treatment → pickling → aligning → flaw detection → cleaning → check → warehouse-in.

Embodiment 1:

A kind of manufacture method of pure titanium seamless tubes comprises the following steps:

A, preparation tube blank bar material: it is finished product titanium ingot that titanium sponge (with one-level or secondary titanium sponge) is smelted through vacuum consumable electrode arc furnace, becomes tube blank bar material through forging (rolling) again, and the diameter of tube blank bar material is φ 50~φ 130mm;

B, tube blank bar material machined: it is the blank of 650~4500mm that tube blank bar material sawing (adopting abrasive machine etc.) is become length; With horizontal centring machine centering, its internal point scope is at φ 18 ± 0.5~φ 30 ± 0.5mm then; And then with peeling locomotive light blank surface defective;

C, roll piercing: with blank heating to 700~980 ℃, carry out 1~2 perforation with the two-roll oblique rolling mill group, use molybdenum plug or water-cooled top, perforation roll inclination angle is that 8 °, roll revolution are 40~90 basic speed~195r/min, promptly make hollow forging after the perforation, hollow forging specification external diameter is that φ 72~φ 125mm, wall thickness are that 5~20mm, length are 1500~6000mm;

D, cold rolling: the waste tube outer surface that makes after the roll piercing is carried out reconditioning, adopt two cold mill groups, multiple rollers cold calender group, KPW25 milling train, SWK75 milling train or HPT160 mill milling (promptly cold rolling) then, whenever finish once rolling after again through degreasing, annealing, pickling, straightening processing, circulate rolling like this and handle after promptly make finished product; Circulate rolling and handle in the semi-finished product annealing temperature: 750~850 ℃+air cooling, time 20~100min;

E, finished product heat treatment and service check, warehouse-in: with finished product heat treatment, the annealing temperature that makes: 700~800 ℃+air cooling, time 20~100min; Again by specification requirement detect a flaw, service check, warehouse-in; Trimmed size is external diameter φ 10.0~φ 89.0 * wall thickness 1.0~16.0mm.

The described two cold mill groups of step (d) are LG80, LG55 or LG30 two cold mill groups.

The described multiple rollers cold calender group of step (d) is LD60, LD30 or LD15 multiple rollers cold calender group.

The present invention has the production efficiency height, production cost is low, lumber recovery is high, with short production cycle, the equipment investment expense is low, good, the every mechanical performance index of the pipe surface quality of producing all meets advantages such as national standard.

Embodiment 2:

A kind of manufacture method of pure titanium seamless tubes comprises the following steps:

A, preparation tube blank bar material: it is finished product titanium ingot that titanium sponge (with one-level or secondary titanium sponge) is smelted through vacuum consumable electrode arc furnace, becomes tube blank bar material through forging (rolling) again, and the diameter of tube blank bar material is φ 90mm;

B, tube blank bar material machined: it is the blank of 650~4500mm that tube blank bar material sawing (adopting abrasive machine etc.) is become length; With horizontal centring machine centering, its internal point scope is at φ 18 ± 0.5~φ 30 ± 0.5mm then; And then with peeling locomotive light blank surface defective;

C, roll piercing: with blank heating to 700~980 ℃, carry out 1~2 perforation with the two-roll oblique rolling mill group, use molybdenum plug or water-cooled top, perforation roll inclination angle is that 8 °, roll revolution are 40~90 basic speed~195r/min, promptly make hollow forging after the perforation, hollow forging specification external diameter is that φ 72~φ 125mm, wall thickness are that 5~20mm, length are 1500~6000mm;

D, cold rolling: the waste tube outer surface that makes after the roll piercing is carried out reconditioning, adopt two cold mill groups, multiple rollers cold calender group, KPW25 milling train or SWK75 mill milling (promptly cold rolling) then, whenever finish once rolling after again through degreasing, annealing, pickling, straightening processing, circulate rolling like this and handle after promptly make finished product; Circulate rolling and handle in the semi-finished product annealing temperature: 750~850 ℃+air cooling, time 20~100min;

E, finished product heat treatment and service check, warehouse-in: with finished product heat treatment, the annealing temperature that makes: 700~800 ℃+air cooling, time 20~100min; Again by specification requirement detect a flaw, service check, warehouse-in; Trimmed size can be external diameter φ 10.0~φ 89.0 * wall thickness 1.0~16.0mm.

The described two cold mill groups of step (d) are LG80, LG55 or LG30 two cold mill groups.

The described multiple rollers cold calender group of step (d) is LD60, LD30 or LD15 multiple rollers cold calender group.

Adopt the inventive method to carry out two batches of productions altogether, two batches finished product is φ 25 * 1.5mm specification, and good with the pure titanium pipe surface quality of the inventive method manufacturing, every mechanical performance index all meets GB/T3624-95 or GB/T3625-95 requirement.

The invention is not restricted to the foregoing description, content of the present invention is described all can implement and have described good result.

Claims (4)

1. the manufacture method of a pure titanium seamless tubes is characterized in that comprising the following steps:
A, preparation tube blank bar material: it is finished product titanium ingot that titanium sponge is smelted through vacuum consumable electrode arc furnace, and again through forging into tube blank bar material, the diameter of tube blank bar material is φ 50~φ 130mm;
B, tube blank bar material machined: it is the blank of 650~4500mm that the tube blank bar material sawing is become length; With horizontal centring machine centering, its internal point scope is at φ 18 ± 0.5~φ 30 ± 0.5mm then; And then with peeling locomotive light blank surface defective;
C, roll piercing: with blank heating to 700~980 ℃, carry out 1~2 perforation with the two-roll oblique rolling mill group, use molybdenum plug or water-cooled top, perforation roll inclination angle is that 8 °, roll rotational speed are 40 basic speed~195r/min, promptly make hollow forging after the perforation, hollow forging specification external diameter is that φ 72~φ 125mm, wall thickness are that 5~20mm, length are 1500~6000mm;
D, cold rolling: the waste tube outer surface that makes after the roll piercing is carried out reconditioning, adopt two cold mill groups, multiple rollers cold calender group, KPW25 milling train, SWK75 milling train or HPT160 mill milling then, whenever finish once rolling after again through degreasing, annealing, pickling, straightening processing, circulate rolling like this and handle after promptly make finished product; Circulate rolling and handle in the semi-finished product annealing temperature: 750~850 ℃, time 20~100min, air cooling then;
E, finished product heat treatment and service check, warehouse-in: with the finished product heat treatment that makes, 700~800 ℃ of annealing temperatures, time 20~100min, air cooling then; Again by specification requirement detect a flaw, service check, warehouse-in; Trimmed size is external diameter φ 10.0~φ 89.0, wall thickness 1.0~16.0mm.
2. by the manufacture method of the described pure titanium seamless tubes of claim 1, it is characterized in that: the described two cold mill groups of step (d) are LG80, LG55 or LG30 two cold mill groups.
3. by the manufacture method of the described pure titanium seamless tubes of claim 1, it is characterized in that: the described multiple rollers cold calender group of step (d) is LD60, LD30 or LD15 multiple rollers cold calender group.
4. by the manufacture method of the described pure titanium seamless tubes of claim 1, it is characterized in that: the described titanium sponge of step (a) is with one-level or secondary titanium sponge.
CN2007100507707A 2007-12-13 2007-12-13 Method for manufacturing pure titanium seamless tubes CN101708511B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007100507707A CN101708511B (en) 2007-12-13 2007-12-13 Method for manufacturing pure titanium seamless tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2007100507707A CN101708511B (en) 2007-12-13 2007-12-13 Method for manufacturing pure titanium seamless tubes

Publications (2)

Publication Number Publication Date
CN101708511A CN101708511A (en) 2010-05-19
CN101708511B true CN101708511B (en) 2011-09-28

Family

ID=42401329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007100507707A CN101708511B (en) 2007-12-13 2007-12-13 Method for manufacturing pure titanium seamless tubes

Country Status (1)

Country Link
CN (1) CN101708511B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102274870A (en) * 2010-06-08 2011-12-14 黄武军 Production process for stainless steel pierced billet
CN101927312B (en) * 2010-08-10 2012-07-04 宝鸡市金盛伟业稀有金属有限公司 Method for processing TC4 titanium alloy into forged rings
CN102371288A (en) * 2010-08-27 2012-03-14 北京有色金属研究总院 Preparation method of high-precision and high-strength titanium alloy seamless tube
CN101972794B (en) * 2010-10-28 2013-03-13 孙子城 Manufacture technology of High-strength non-magnetic thick-wall titanium alloy seamless tube
CN102389900B (en) * 2011-09-17 2013-06-26 西部钛业有限责任公司 High-precision processing method for Ti-3Al-2.5V (TA18) aviation titanium tube
CN102615138B (en) * 2012-03-30 2014-05-07 西北有色金属研究院 Method for manufacturing titanium pipe
CN102899508B (en) * 2012-09-11 2017-04-12 西安赛特金属材料开发有限公司 High-strength pure titanium material
CN102909237B (en) * 2012-11-22 2015-09-09 宁夏东方钽业股份有限公司 A kind of preparation method of TA18 thick-wall tube
CN103128102B (en) * 2013-03-18 2015-03-04 天津钢管集团股份有限公司 Production method of titanium alloy oil well pipe
CN103146956B (en) * 2013-03-26 2015-10-28 武汉武船机电设备有限责任公司 A kind of titanium alloy pipe and manufacture method
CN103331325A (en) * 2013-06-18 2013-10-02 中兴能源装备股份有限公司 Method for manufacturing ultra-large-diameter pipeline
CN103736734B (en) * 2013-12-30 2015-09-30 江苏常宝钢管股份有限公司 Hot rolling CPE unit prepares the technique of the super 13Cr seamless steel pipe of high-chromium alloy
CN103894442B (en) * 2014-03-26 2016-04-06 宁夏东方钽业股份有限公司 Tantalum pipe and preparation method thereof
CN103934269B (en) * 2014-03-31 2016-06-08 攀钢集团成都钢钒有限公司 A kind of TC4 titanium alloy seamless tube and production method thereof
CN104259246B (en) * 2014-08-29 2016-08-24 攀钢集团成都钢钒有限公司 The method producing high strength titanium alloy seamless pipe
CN104475459B (en) * 2014-10-10 2016-07-20 天津钢管集团股份有限公司 Improve the control method of pierced shell rolling quality
CN105033584B (en) * 2015-07-31 2017-07-18 湖州高林不锈钢管制造有限公司 A kind of heat-resistance stainless steel method of manufacturing seamless steel pipe
CN105171348B (en) * 2015-09-07 2018-04-27 云南钛业股份有限公司 A kind of production method of TA10 alloy seamless pipe
CN105396895B (en) * 2015-11-27 2017-06-20 中国船舶重工集团公司第七二五研究所 A kind of hot rolling method of the seamless oil pipe of titanium or titanium alloy
CN105619085B (en) * 2016-02-29 2018-11-06 扬州诚德钢管有限公司 The big volume seamless steel gas cylinder production technologies of diameter 914mm
CN105964721B (en) * 2016-05-09 2018-03-06 金堆城钼业股份有限公司 A kind of preparation method of molybdenum and molybdenum alloy tubing
CN107052076B (en) * 2016-11-28 2019-02-26 安徽宝泰特种材料有限公司 A kind of method of collet plug hot rolling heavy caliber titanium or titanium alloy thin-wall seamless pipe
CN107199243B (en) * 2017-07-18 2018-10-02 攀钢集团研究院有限公司 The production method of heavy caliber titanium seamless tubes
CN107234145B (en) * 2017-07-18 2018-10-02 攀钢集团研究院有限公司 The method of pure titanium seamless tubes roll piercing
CN107413852B (en) * 2017-09-22 2019-04-30 攀钢集团研究院有限公司 Preparation method for the pure titanium hollow billet of TA2
CN107738070A (en) * 2017-09-29 2018-02-27 宝鸡市金海源钛标准件制品有限公司 A kind of preparation method of titanium alloy seamless pipe
CN108202088B (en) * 2017-11-22 2019-08-20 宁夏东方钽业股份有限公司 A kind of processing method of small dimension titanium or titanium alloy Bar Wire Product
CN109513766A (en) * 2018-11-15 2019-03-26 南通金尼新材料科技有限公司 A kind of manufacturing method of high concentricity martensitic stainless steel seamless pipe material
CN110170529A (en) * 2019-05-22 2019-08-27 山西太钢不锈钢股份有限公司 A kind of hot piercing method of high alloy heat-resistance stainless steel hollow billet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368487A1 (en) * 1988-10-18 1990-05-16 Crucible Materials Corporation Welded corrosion-resistant ferritic stainless steel tubing and a cathodically protected heat exchanger containing the same
CN1161010A (en) * 1994-10-20 1997-10-01 住友金属工业株式会社 Method of manufacturing seamless steel pipes and manufacturing equipment therefor
CN1721753A (en) * 2004-07-14 2006-01-18 天津市天材科技发展有限公司 Manufacturing method of ferritic stainless steel seamless pipe with small diameter
EP1649945A1 (en) * 2003-06-06 2006-04-26 Sumitomo Metal Industries, Ltd. Drilling/rolling method in manufacturing seamless tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368487A1 (en) * 1988-10-18 1990-05-16 Crucible Materials Corporation Welded corrosion-resistant ferritic stainless steel tubing and a cathodically protected heat exchanger containing the same
CN1161010A (en) * 1994-10-20 1997-10-01 住友金属工业株式会社 Method of manufacturing seamless steel pipes and manufacturing equipment therefor
EP1649945A1 (en) * 2003-06-06 2006-04-26 Sumitomo Metal Industries, Ltd. Drilling/rolling method in manufacturing seamless tube
CN1721753A (en) * 2004-07-14 2006-01-18 天津市天材科技发展有限公司 Manufacturing method of ferritic stainless steel seamless pipe with small diameter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP平4-135005A 1992.05.08

Also Published As

Publication number Publication date
CN101708511A (en) 2010-05-19

Similar Documents

Publication Publication Date Title
CN102489639B (en) Fine-grain roll-forming method for large annular piece made of high alloy steel
CN102615223B (en) The method of rolling two trapezoid cross section flange ring forging parts simultaneously
EP1707280B1 (en) Method for producing seamless pipe
EP1361003B1 (en) Method for manufacuturing seamless steel tube
KR100835056B1 (en) Cold-finished seamless steel pipe
CN101352805B (en) Method for producing stainless steel composite steel plate
RU2278750C2 (en) Method for producing hot rolled conversion large- and mean-diameter tubes of hard-to-form steels and alloys in tube rolling plants with pilger mills
CN103921065B (en) A kind of manufacture method of automobile specified seamless steel pipe
CN101579800B (en) Warm/cold forging process for precision forgings with integrated long shafts and inner ball cages
CN102836895B (en) A kind of manufacture method of special-shaped seamless steel pipe
CN100554475C (en) Fe-Ni alloy pipe stock and manufacture method thereof
CN102294379B (en) Method for manufacturing seamless steel pipe for high-pressure gas cylinder with large caliber
CN103962411B (en) A kind of manufacture method of GH3600 alloy fine thin-wall seamless pipe
CN101612700B (en) Method for preparing seamless steel tubes made of martensite precipitation hardening stainless steel
RU2523398C1 (en) PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 114,3×6, 8×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
CN100445624C (en) Method for preparing large-diameter white copper pipe
CN101623719B (en) Method for manufacturing stainless steel heat transfer pipe of nuclear heat exchanger
CN103128102B (en) Production method of titanium alloy oil well pipe
CN104043672B (en) Extra-supercritical unit high-quality P92 method for manufacturing large-diameter thick-wall seamless steel pipe
CN103170798B (en) A kind of processing method of high-quality large-diameter thin-wall metal cylinder
CN101439350B (en) Method for producing seamless steel pipe for producing gas cylinder with heavy caliber for hauled vehicle
CN103341522B (en) The production method of thick-walled titanium welded tube and forming machine
CN105619085B (en) The big volume seamless steel gas cylinder production technologies of diameter 914mm
CN101327492A (en) Process and system for manufacturing hot-rolled seamless tube
CN103276297B (en) A kind of self-joining type high strength cord is cored the manufacture method of drilling rod weldless steel tube

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant