CN106987770B - A kind of small-bore deep tube cavity processing technology - Google Patents
A kind of small-bore deep tube cavity processing technology Download PDFInfo
- Publication number
- CN106987770B CN106987770B CN201710258102.7A CN201710258102A CN106987770B CN 106987770 B CN106987770 B CN 106987770B CN 201710258102 A CN201710258102 A CN 201710258102A CN 106987770 B CN106987770 B CN 106987770B
- Authority
- CN
- China
- Prior art keywords
- pipe
- pipe fitting
- processing technology
- small
- tube cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000010622 cold drawing Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 2
- 238000007592 spray painting technique Methods 0.000 claims description 2
- 238000004781 supercooling Methods 0.000 claims 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention proposes a kind of small-bore deep tube cavity processing technology, includes the following steps：S1：Select pipe：Selection includes following mass percentage composition C：0.03‑0.1%、Si：0.2‑0.45%、Mn：0.5‑0.8%、P：＜ 0.02%, S：＜ 0.01%, Cu：2‑2.5%、Ni：0.12‑0.35%、Cr：0.05‑0.12%、Mo：The pipe that 0.3 0.6% melting makes；S2：Heat treatment, pipe are put into heating in sloping hearth furnace, into 700 800 DEG C of furnace temperature, for heating temperature at 1,200 1250 DEG C, heat preservation carries out hot piercing, forms steel pipe, pipe fitting produced by the invention, surface is fine and smooth, and intensity is big, and without chatter mark after internal diameter processing, can have good intensity, toughness, plasticity, elongation percentage, indices comply fully with requirement, and it is big to bear pressure, flawless.
Description
Technical field
The present invention relates to pipe fitting processing technology fields, more particularly, to a kind of small-bore deep tube cavity processing technology.
Background technology
It is to use steel ingot or solid tubes that seamless steel pipe, which has hollow section, a large amount of pipelines for being used as trandfer fluid, seamless steel pipe,
Hollow billet is made in base perforated, and then hot rolled, cold rolling or cold group are made, wherein the steel pipe of automobile engine fuel feeding, generally
Using small-bore high-pressure oil pipe, the high pressure during use is still suffered from, the general length of present oil pipe is 4m, diameter 1.8m,
Wall thickness 5mm, if internal diameter is processed using traditional mode, will produce a large amount of chatter mark and wound of uttering a sound or a word for such pipe fitting
Invention content
In order to solve the above technical problems, the present invention proposes a kind of small-bore deep tube cavity processing technology, including following step
Suddenly：
S1：Select pipe：Selection includes following mass percentage composition C：0.03-0.1%, Si：0.2-0.45%,
Mn：0.5-0.8%, P：＜ 0.02%, S：＜ 0.01%, Cu：2-2.5%, Ni：0.12-0.35%, Cr：0.05-0.12%,
Mo：The pipe that 0.3-0.6% meltings make；
S2：Heat treatment, pipe are put into heating in sloping hearth furnace, and heat preservation carries out hot piercing, forms steel pipe；
S3：Pipe is taken out after heat treatment, being placed into cold rinse bank in 30s is cooled down rapidly；
S4:Accurate cold-drawn is carried out to steel pipe raw material using high-accuracy hydraulic pressure cold drawing machine, standard core is set inside steel pipe raw material,
Internal diameter, outer diameter reach requirement after cold-drawn；
S3：Pipe fitting taking-up in S2 is positioned in electrolytic cell, obtains the bright and clean pipe fitting in inner cavity by electrobrightening；
S4：Pipe fitting is fixed on fixed frame, columnar member inserts in pipe fitting, and columnar member is bonded with pipe fitting inner wall, uses height
Columnar member is carried out punching press back and forth in pipe fitting and rotated by pressure press machine, and shaping is carried out to pipe fitting inner wall；
S4：Inner diameter measurement is detected using x-ray detection and checks inside pipe fitting defect；
S5：Coding, packaging, storage.
Preferably, heating and temperature control is at 60 DEG C, voltage 9-12V, electric current 120-130A in the electrolytic cell, electrolysis time
It is 5 minutes.
Preferably, after S2 steps, steel pipe is aligned using straightener.
Preferably, the sloping hearth furnace into 700-800 DEG C of furnace temperature, heating temperature is at 1200-1250 DEG C.
Preferably, the punching press intensity of the high pressure press machine is 1000MPa-2000MPa.
Preferably, it includes following mass percentage composition C that the component of the pipe, which includes selection,：0.02%, Si:
0.3%, Mn:0.6%, P：0.01、S：0.01%, Cu：2.25%, Ni：0.15%, Cr:0.1%, Mo:0.5%.
Preferably, it is 4m, tube wall 5mm, internal diameter 1.8m that the steel pipe raw material obtains length after cold-drawn.
Preferably, further include that spray painting step is carried out to pipe fitting internal diameter, take strip spray tool to stretch in pipe fitting, rotate strip
Spray tool, uniformly paints to inner wall.
Small-bore deep tube cavity processing technology proposed by the present invention has following advantageous effect：Pipe fitting produced by the invention, table
Face is fine and smooth, and intensity is big, and can have good intensity, toughness, plasticity, elongation percentage, indices without chatter mark after internal diameter processing
Requirement is complied fully with, it is big to bear pressure, flawless.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described.
Embodiment 1
The present invention proposes a kind of small-bore deep tube cavity processing technology, includes the following steps：
S1：Select pipe：Selection includes following mass percentage composition C：0.1%, Si：0.45%, Mn：0.8%, P：
0.02%, S：0.01%, Cu：2.5%, Ni：0.35%, Cr：0.12%, Mo：The pipe that 0.6% melting makes；
S2：Heat treatment, pipe is put into heating in sloping hearth furnace, into 700 DEG C of furnace temperature, heating temperature at 1200 DEG C, keep the temperature into
Row hot piercing forms steel pipe；
S3：Pipe is taken out after heat treatment, being placed into cold rinse bank in 30s is cooled down rapidly；
S4:Accurate cold-drawn is carried out to steel pipe raw material using high-accuracy hydraulic pressure cold drawing machine, standard core is set inside steel pipe raw material,
Internal diameter, outer diameter reach requirement after cold-drawn；
S3：Pipe fitting taking-up in S2 is positioned in electrolytic cell, the bright and clean pipe fitting in inner cavity, the electrolytic cell by electrobrightening
For interior heating and temperature control at 60 DEG C, voltage 9V, electric current 120A, electrolysis time is 5 minutes；
S4：Pipe fitting is fixed on fixed frame, columnar member inserts in pipe fitting, and columnar member is bonded with pipe fitting inner wall, uses height
Columnar member is carried out punching press back and forth by pressure press machine in pipe fitting, and shaping is carried out to pipe fitting inner wall；
S4：Inner diameter measurement is detected using x-ray detection and checks inside pipe fitting defect；
S5：Coding, packaging, storage.
Embodiment 2
The present invention proposes a kind of small-bore deep tube cavity processing technology, includes the following steps：
S1：Select pipe：Selection includes following mass percentage composition C：0.03%, Si：0.2%, Mn：0.5%, P：
0.01%, S：0.01%, Cu：2%, Ni：0.12%, Cr：0.05%, Mo：The pipe that 0.3% melting makes；
S2：Heat treatment, pipe is put into heating in sloping hearth furnace, into 700 DEG C of furnace temperature, heating temperature at 1200 DEG C, keep the temperature into
Row hot piercing forms steel pipe；
S3：Pipe is taken out after heat treatment, being placed into cold rinse bank in 30s is cooled down rapidly；
S4:Accurate cold-drawn is carried out to steel pipe raw material using high-accuracy hydraulic pressure cold drawing machine, standard core is set inside steel pipe raw material,
Internal diameter, outer diameter reach requirement after cold-drawn；
S3：Pipe fitting taking-up in S2 is positioned in electrolytic cell, the bright and clean pipe fitting in inner cavity, the electrolytic cell by electrobrightening
For interior heating and temperature control at 60 DEG C, voltage 10V, electric current 130A, electrolysis time is 5 minutes；
S4：Pipe fitting is fixed on fixed frame, columnar member inserts in pipe fitting, and columnar member is bonded with pipe fitting inner wall, uses height
Columnar member is carried out punching press back and forth by pressure press machine in pipe fitting, and shaping is carried out to pipe fitting inner wall；
S4：Inner diameter measurement is detected using x-ray detection and checks inside pipe fitting defect；
S5：Coding, packaging, storage.
Embodiment 3
The present invention proposes a kind of small-bore deep tube cavity processing technology, includes the following steps：
S1：Select pipe：Selection includes following mass percentage composition C：0.05%, Si：0.2%, Mn：0.5%, P：
0.01%, S：0.01%, Cu：2%, Ni：0.3%, Cr：0.08%, Mo：The pipe that 0.5% melting makes；
S2：Heat treatment, pipe is put into heating in sloping hearth furnace, into 800 DEG C of furnace temperature, heating temperature at 1200 DEG C, keep the temperature into
Row hot piercing forms steel pipe；
S3：Pipe is taken out after heat treatment, being placed into cold rinse bank in 30s is cooled down rapidly；
S4:Accurate cold-drawn is carried out to steel pipe raw material using high-accuracy hydraulic pressure cold drawing machine, standard core is set inside steel pipe raw material,
Internal diameter, outer diameter reach requirement after cold-drawn；
S3：Pipe fitting taking-up in S2 is positioned in electrolytic cell, the bright and clean pipe fitting in inner cavity, the electrolytic cell by electrobrightening
For interior heating and temperature control at 60 DEG C, voltage 12V, electric current 130A, electrolysis time is 5 minutes；
S4：Pipe fitting is fixed on fixed frame, columnar member inserts in pipe fitting, and columnar member is bonded with pipe fitting inner wall, uses height
Columnar member is carried out punching press back and forth by pressure press machine in pipe fitting, and shaping is carried out to pipe fitting inner wall；
S4：Inner diameter measurement is detected using x-ray detection and checks inside pipe fitting defect；
S5：Coding, packaging, storage.
In three above embodiment, the blank tube material intensity used is big and smooth, and pipe fitting endurance obtained is strong, and
Coordinate high-pressure unit to fling shaping vertically to pipe fitting inner wall progress using columnar member, effectively prevent the generation of chatter mark, production efficiency high.
A variety of modifications of embodiment will be apparent to those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, originally
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein
Consistent widest range.
Claims (8)
1. a kind of small-bore deep tube cavity processing technology, which is characterized in that include the following steps：
S1：Select pipe：Selection includes following mass percentage composition C：0.03-0.1%, Si：0.2-0.45%, Mn：
0.5-0.8%, P：＜ 0.02%, S：＜ 0.01%, Cu：2-2.5%, Ni：0.12-0.35%, Cr：0.05-0.12%, Mo：
The pipe that 0.3-0.6% meltings make；
S2：Heat treatment, pipe are put into heating in sloping hearth furnace, and heat preservation carries out hot piercing, forms steel pipe；
S3：Pipe is taken out after heat treatment, being placed into cold rinse bank in 30s is cooled down rapidly；
S4:Accurate cold-drawn is carried out to steel pipe raw material using high-accuracy hydraulic pressure cold drawing machine, standard core, cold-drawn are set inside steel pipe raw material
Internal diameter, outer diameter reach requirement afterwards；
S5：Pipe fitting taking-up in S4 is positioned in electrolytic cell, obtains the bright and clean pipe fitting in inner cavity by electrobrightening；
S6：Pipe fitting is fixed on fixed frame, columnar member inserts in pipe fitting, and columnar member is bonded with pipe fitting inner wall, is rushed using high pressure
Columnar member is carried out punching press back and forth in pipe fitting and rotated by press, and shaping is carried out to pipe fitting inner wall；
S7：Inner diameter measurement is detected using x-ray detection and checks inside pipe fitting defect；
S8：Coding, packaging, storage.
2. small-bore deep tube cavity processing technology according to claim 1, which is characterized in that the electrolytic cell Nei Jiarewen
At 60 DEG C, voltage 9-12V, electric current 120-130A, electrolysis time is 5 minutes for degree control.
3. small-bore deep tube cavity processing technology according to claim 2, which is characterized in that after S2 steps, using strong
Straight machine aligns steel pipe.
4. small-bore deep tube cavity processing technology according to claim 1, which is characterized in that the sloping hearth furnace into furnace temperature
700-800 DEG C of degree, heating temperature is at 1200-1250 DEG C.
5. small-bore deep tube cavity processing technology according to claim 1, which is characterized in that the high pressure press machine rushes
Compressive Strength is 1000MPa-2000MPa.
6. small-bore deep tube cavity processing technology according to claim 1, which is characterized in that the component of the pipe includes
Selection includes following mass percentage composition C：0.02%, Si:0.3%, Mn:0.6%, P：0.01、S：0.01%, Cu：
2.25%, Ni：0.15%, Cr:0.1%, Mo:0.5%.
7. small-bore deep tube cavity processing technology according to claim 1, which is characterized in that the steel pipe raw material is through supercooling
It is 4m, tube wall 5mm, internal diameter 1.8m that length is obtained after pulling out.
8. small-bore deep tube cavity processing technology according to claim 7, which is characterized in that further include to pipe fitting internal diameter into
Row spray painting step takes strip spray tool to stretch in pipe fitting, and rotation strip spray tool uniformly paints to inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258102.7A CN106987770B (en) | 2017-04-19 | 2017-04-19 | A kind of small-bore deep tube cavity processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258102.7A CN106987770B (en) | 2017-04-19 | 2017-04-19 | A kind of small-bore deep tube cavity processing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106987770A CN106987770A (en) | 2017-07-28 |
| CN106987770B true CN106987770B (en) | 2018-08-14 |
Family
ID=59415584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710258102.7A Active CN106987770B (en) | 2017-04-19 | 2017-04-19 | A kind of small-bore deep tube cavity processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106987770B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149083A (en) * | 1995-10-20 | 1997-05-07 | 化学工业部湘东化工机械厂 | Low alloyed wear-resistant cast steel pipes and its casting process |
| CN101333911A (en) * | 2007-06-28 | 2008-12-31 | 张二建 | Small caliber cold-drawing oil conduit and its processing method |
| JP4281213B2 (en) * | 2000-05-11 | 2009-06-17 | 住友金属工業株式会社 | Seamless steel pipe for machine structures with excellent machinability, hot workability and toughness |
| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN104962838A (en) * | 2015-06-18 | 2015-10-07 | 宝山钢铁股份有限公司 | High-strength steel, high-strength plastic seamless steel pipe for automotive driver shafts and manufacturing method of high-strength plastic seamless steel pip |
| CN104988428A (en) * | 2015-07-09 | 2015-10-21 | 张家港市圣鼎源制管有限公司 | Small-caliber high-pressure oil pipe machining process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001138066A (en) * | 1999-11-17 | 2001-05-22 | Sumitomo Metal Ind Ltd | Method of manufacturing carbon steel pipe for high formability hydroforming |
| JP6596971B2 (en) * | 2015-06-24 | 2019-10-30 | 日本製鉄株式会社 | Bending ERW steel pipe with excellent corrosion resistance |
-
2017
- 2017-04-19 CN CN201710258102.7A patent/CN106987770B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149083A (en) * | 1995-10-20 | 1997-05-07 | 化学工业部湘东化工机械厂 | Low alloyed wear-resistant cast steel pipes and its casting process |
| JP4281213B2 (en) * | 2000-05-11 | 2009-06-17 | 住友金属工業株式会社 | Seamless steel pipe for machine structures with excellent machinability, hot workability and toughness |
| CN101333911A (en) * | 2007-06-28 | 2008-12-31 | 张二建 | Small caliber cold-drawing oil conduit and its processing method |
| CN101633999A (en) * | 2009-05-26 | 2010-01-27 | 山西太钢不锈钢股份有限公司 | Austenitic stainless steel, steel tube thereof and manufacturing method thereof |
| CN104962838A (en) * | 2015-06-18 | 2015-10-07 | 宝山钢铁股份有限公司 | High-strength steel, high-strength plastic seamless steel pipe for automotive driver shafts and manufacturing method of high-strength plastic seamless steel pip |
| CN104988428A (en) * | 2015-07-09 | 2015-10-21 | 张家港市圣鼎源制管有限公司 | Small-caliber high-pressure oil pipe machining process |
Non-Patent Citations (1)
| Title |
|---|
| "我国不锈钢管市场需求及国内外不锈钢管生产技术发展趋势";钟倩霞等;《钢管》;20021028;第1-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106987770A (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106583491B (en) | A kind of manufacturing method of Cr-Ni-Mo-Nb nickel-base alloy seamless pipe | |
| CN107553074B (en) | Manufacturing method of UNS N08810 iron-nickel based alloy large-caliber seamless pipe for high-temperature heating furnace | |
| CN110052792B (en) | Manufacturing method of cylinder barrel for hydraulic cylinder | |
| CN103436735B (en) | A kind of preparation method of beta-titanium alloy tubing | |
| CN105665468B (en) | A kind of preparation method of high precision major diameter thin-wall titanium tubing | |
| CN105793456A (en) | Steel wire for bolts, bolts and manufacturing method thereof | |
| CN106216957B (en) | The manufacture method of torsion beam of automobile welded still pipe | |
| CN101781743A (en) | Seamless steel tube for ultra supercritical boiler and manufacturing method thereof | |
| CN103753146B (en) | A kind of high-pressure boiler nickel-based alloy pipe production technology | |
| CN104259246B (en) | The method producing high strength titanium alloy seamless pipe | |
| CN107345290B (en) | A kind of manufacturing method of TC4 titanium alloy thin wall ring | |
| CN105441829B (en) | A kind of steam generator 08X18H10T stainless-steel seamless pipes | |
| CN105363823A (en) | Method for rolling aluminum alloy sheet forge pieces | |
| CN110218940A (en) | A kind of high-temperature alloy seamless pipe and preparation method thereof | |
| CN103089781A (en) | Method for machining high-strength double end bolt | |
| CN112845658B (en) | A kind of preparation method of UNS N08825 small diameter precision seamless pipe | |
| CN104451381A (en) | Large-caliber Gr3 seamless steel tube applied at low temperature and production method thereof | |
| CN100408905C (en) | Manufacturing method of seamless steel pipe for pressure pipeline | |
| CN105018836A (en) | Manufacturing method for precision seamless steel tube for drill rod of rotary drilling rig | |
| CN105441713A (en) | A titanium alloy seamless tube and a manufacturing method thereof | |
| WO2008151479A1 (en) | An ultra-thin flexible tube made of an alloy and the manufacture process thereof | |
| CN106987770B (en) | A kind of small-bore deep tube cavity processing technology | |
| CN105397417A (en) | Rolling method of high-temperature alloy plate shaped forging | |
| CN104878310B (en) | A kind of high-pressure seamless gas storage cylinder and manufacturing process | |
| CN101985678B (en) | Preparation method of austenitic stainless steel pipe blank for nuclear power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |