CN106391714A - Small-diameter seamless magnesium alloy pipe oblique rolling technique - Google Patents
Small-diameter seamless magnesium alloy pipe oblique rolling technique Download PDFInfo
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- CN106391714A CN106391714A CN201610638867.9A CN201610638867A CN106391714A CN 106391714 A CN106391714 A CN 106391714A CN 201610638867 A CN201610638867 A CN 201610638867A CN 106391714 A CN106391714 A CN 106391714A
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- rolling
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 131
- 238000005096 rolling process Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 210000002615 epidermis Anatomy 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910001234 light alloy Inorganic materials 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 3
- 238000003801 milling Methods 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000001519 tissue Anatomy 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a small-diameter seamless magnesium alloy pipe oblique rolling technique and belongs to the field of light alloy material production. The technical problems that the plastic deformation capacity of magnesium alloy is poor, and a seamless magnesium alloy pipe is prone to cracking in the machining process are solved. According to the solution, the oblique rolling technique comprises the following sequential steps that firstly, a constitutive equation is established; secondly, a rolling model is established, specifically, practical rolling technological parameters are determined by means of Deform finite element software through simulation; and (3) oblique rolling and perforating are conducted, specifically, a bar stock sequentially passes a to-be-perforated stage and an oblique rolling and perforating stage, the head portion and the tail portion of an obtained seamless magnesium alloy pipe billet are cut off, and a finished seamless magnesium alloy pipe is obtained through subsequent production. According to the technique, a traditional extruding and drawing technique is replaced with the oblique rolling and perforating technique to produce the seamless magnesium alloy pipe, the seamless magnesium alloy pipe machining problems of high energy consumption and low efficiency are solved fundamentally, the machining period is effectively shortened, and guarantees are provided for production of the high-quality seamless magnesium alloy pipe.
Description
Technical field
The invention belongs to light alloy material production field is and in particular to a kind of production of the seamless magnesium-alloy tube of minor diameter, special
It is not to be related to using the seamless magnesium-alloy tube of roller trio skew rolling technique productions.
Technical background
At present, domestic existing a collection of magnesium alloy processed edge enterprise, but because magnesium alloy rolling is theoretical, Processes and apparatus side
There is technical bug in face, its production is relatively backward, cause magnesium alloy secondary industry pollution more serious, power consumption higher, resource is comprehensive
Close producing level poor, unstable product quality, product lumber recovery is low, and primary raw material and former magnesium products are more, and magnesium alloy adds deeply
Work enterprise and product are less.
In view of magnesium alloy plastic deformation ability is poor, in the course of processing easy cracking problem, existing seamless magnesium-alloy tube is big
Adopt extrudes or drawing process production, wherein more：Traditional magnesium-alloy tube extrusion process die wear is fast, product uneven microstructure,
Anisotropy substantially, affects microscopic structure and the mechanical property of magnesium-alloy tube, affects follow-up deep processing, further limit magnesium
The application of compo pipe；Seamless magnesium-alloy tube drawing process has the following disadvantages：Complex process, through multi pass drawing, every one
Secondary deflection is little, and the surface of drawing pipe may produce oxidative phenomena, thus surface quality is poor, it is possible that managing in drawing process
Situation about being pulled off, so that productivity ratio is low, is also restricted by length simultaneously.
Extrusion magnesium alloy pipe anisotropy can be solved well using the roll piercing seamless magnesium-alloy tube of production serious
Problem, three-phase compressive stress makes operation of rolling pipe surface not easy to crack and oblique rolling perforated process has stock utilization height, life
Produce efficiency high, roll that rear hollow billet structure property is good, this is all that current squeezing seamless pipe is beyond one's reach, but due to magnesium alloy materials
The attribute of itself, it is larger, so rarely have in prior art passing through that seamless magnesium-alloy tube difficulty is prepared in magnesium alloy bar roll piercing
The seamless magnesium-alloy tube that roll piercing produces.
Content of the invention
The technical problem to be solved in the present invention is：For magnesium alloy plastic deformation ability is poor, seamless magnesium-alloy tube is processed
The technical problem easily ftractureing in journey, the present invention proposes a kind of minor diameter seamless magnesium-alloy tube oblique roll process, using roll piercing
Technology generations replace traditional extruding, drawing process to produce seamless magnesium-alloy tube, fundamentally solve high energy consumption, inefficient seamless magnesium
Compo pipe processing problems, effectively shorten the process-cycle, provide safeguard for producing the seamless magnesium-alloy tube of high-quality.
The present invention is achieved by the following technical programs.
A kind of minor diameter is seamless magnesium-alloy tube oblique roll process is it is characterised in that carried out successively using following steps：
(1), set up constitutive equation
Under the conditions of extruded Magnesium Alloy being carried out with different distortion by Gleeble thermal simulation experiment machine, isotherm compression is tested,
Obtain magnesium alloy true stress and strain curve at different conditions, build constitutive equation as follows：
In formula：R gas constant, R=8.314J/ (mol K)；
T absolute temperature, unit is K；
Strain rate, unit is s-1；
σ flow stress, unit is MPa；
(2), set up rolling model
Use Deform finite element software, using different temperatures, front-extending quantity, pore throat diameter carries out seamless magnesium-alloy tube and bored a hole
Journey is simulated, and finally determines rolling technological parameter；
(3), roll piercing
I. the stage to be perforated
(1), first internal point Φ 15mm × 15mm is beaten in magnesium alloy bar front end, then magnesium alloy bar is put into heating
Preheat in stove, preheating temperature is 400～450 DEG C, temperature retention time is 1～2 hour, makes magnesium alloy bar epidermis and center portion temperature phase
Same, remain the use of roll piercing stage；
(2), start roll piercing unit, and rolling technological parameter is set according to rolling model；
II. the roll piercing stage
(1), equipment preheating：Start electrical control cabinet, make roll idle running appropriate time；Preheated nip roll and roller-way：Before taking, step is pre-
A magnesium alloy bar after heat does not use top to carry out punishment in advance shallow pass, preheated nip roll and roller-way；
(2), mobile push rod dolly, adjusts top head front-extending quantity, separately takes a preheated magnesium alloy bar to be put in roller-way,
Bar is pushed punch block roll and nips by push rod, and magnesium alloy bar carries out magnesium alloy bar oblique milling in the presence of roll is with top
Perforation；
(3), after, perforation finishes, push rod agv controller is recalled rapidly so that the seamless magnesium-alloy tube after boring a hole departs from top
Bar, then seamless magnesium alloy hollow billet is placed on refrigeration bench frame and is air cooled to room temperature；
(4), by the seamless magnesium alloy hollow billet topping after air cooling and afterbody, remain subsequent production seamless magnesium alloy finished product
Pipe.
Further, in described claim 1, (two) step is：The parameter that constitutive equation is determined imports Deform-3D
In material depot, define magnesium alloy materials attribute, finally determine rolling technological parameter.
Further, determine that oblique roll process parameter is：Rolling temperature be 350～500 DEG C, top head front-extending quantity be 15～
25mm, selects feed angle to be 6 °～10 °, a diameter of Φ 30mm in top, pore throat a diameter of Φ 34mm or Φ 35mm, roll rotational speed are
90～200rpm.
Further, determine that optimum oblique roll process parameter is：Rolling temperature is 400 DEG C, and top head front-extending quantity is 20mm, choosing
Select feed angle to be 7 °, come directly towards a diameter of Φ 30mm, pore throat a diameter of Φ 34mm or Φ 35mm, roll rotational speed for 170rpm.
Further, a diameter of Φ 40mm of the seamless magnesium-alloy tube being obtained after roll piercing, pipe thickness is 5.5mm.
The present invention compared with prior art has the advantages that.
1st, the present invention adopts roll piercing to produce magnesium-alloy tube, improves stock utilization, improve production efficiency, it is to avoid serious
Each diversity, roll rear even tissue refinement mechanical property and be improved, the Product Precision that it produces is high, high comprehensive performance
Advantage.
2nd, the present invention can replace conventional extruded operation to produce seamless magnesium-alloy tube, is made in pipe using three high cross piercing
The heart is subject to three-dimensional compressive stress state so that being not easily susceptible to cracking in seamless magnesium-alloy tube production process.
Brief description
Fig. 1 is without magnesium-alloy tube microcosmic grain morphology SEM figure seamless before present invention rolling, analyzes this figure and learns and rolls front putting down
All crystallite dimension is 30 μm.
Fig. 2 is seamless magnesium-alloy tube microcosmic grain morphology SEM figure after present invention rolling, analyzes this figure and learns and rolls afterwards averagely
Crystallite dimension is 3 μm.
Fig. 3 be Gleeble thermal simulation experiment machine to the strain rate that records after extruded Magnesium Alloy pressure be when 0.005 not
With true stress-strain curve figure in the case of heating-up temperature.
Fig. 4 be Gleeble thermal simulation experiment machine to the strain rate that records after extruded Magnesium Alloy pressure be when 0.05 not
With true stress-strain curve figure in the case of heating-up temperature.
Fig. 5 is Gleeble thermal simulation experiment machine is different when 0.5 to the strain rate recording after extruded Magnesium Alloy pressure
True stress-strain curve figure in the case of heating-up temperature.
Fig. 6 is Gleeble thermal simulation experiment machine is different when 3 adding to the strain rate recording after extruded Magnesium Alloy pressure
True stress-strain curve figure under hot temperature conditionss.
The roll piercing model schematic that Fig. 7 sets up for the present invention.
Fig. 8 is the seamless magnesium-alloy tube microcosmic grain morphology SEM figure that the present invention is prepared through embodiment one.
Fig. 9 is the seamless magnesium-alloy tube microcosmic grain morphology SEM figure that the present invention is prepared through embodiment two.
Figure 10 is the seamless magnesium-alloy tube microcosmic grain morphology SEM figure that the present invention is prepared through embodiment three.
In figure, 1 is roll, and 2 is top, and 3 is magnesium alloy bar.
Specific embodiment
With reference to embodiment, the present invention is elaborated：The present embodiment is to be carried out premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following enforcement
Example.
Embodiment one
As shown in Fig. 1～7, a kind of minor diameter is seamless magnesium-alloy tube oblique roll process, carried out successively using following steps：
(1), set up constitutive equation
0.005s is carried out respectively to extruded Magnesium Alloy by Gleeble thermal simulation experiment machine-1、0.05s-1、0.5s-1、
3s-1Rate of deformation, 200 DEG C, 250 DEG C, 300 DEG C, 350 DEG C, 400 DEG C, isotherm compression experiment under 450 DEG C of heating temperature condition, obtain
Obtain magnesium alloy true stress and strain curve, build constitutive equation as follows：
In formula：R gas constant, R=8.314J/ (mol K)；
T absolute temperature, unit is K；
Strain rate, unit is s-1；
σ flow stress, unit is MPa.
(2), set up rolling model
Use Deform finite element software, using different temperatures, front-extending quantity, pore throat diameter carries out seamless magnesium-alloy tube and bored a hole
Journey is simulated, and the parameter that constitutive equation is determined imports in Deform-3D material depot, defines magnesium alloy materials attribute, final determination
In the present embodiment one, rolling technological parameter is：Rolling temperature is 350 DEG C, and top 2 front-extending quantities are 15mm, select feed angle to be 6 °,
Come directly towards 2 a diameter of Φ 30mm, pore throat a diameter of Φ 34mm, roll 1 rotating speed be 90rpm.
(3), roll piercing
I. the stage to be perforated
(1), first internal point Φ 15mm × 15mm is beaten in magnesium alloy bar 3 front end, then magnesium alloy bar 3 is put into and add
Preheat in hot stove, preheating temperature is 420 DEG C, temperature retention time is 1 hour, makes bar epidermis identical with center portion temperature, remains oblique milling
The perforation stage uses；
(2), start roll piercing unit, and rolling technological parameter is set according to rolling model；
II. the roll piercing stage
(1), equipment preheating：Start electrical control cabinet, make roll 1 idle running appropriate time；Preheated nip roll 1 and roller-way：Take front step
A magnesium alloy bar after preheating does not use top to carry out punishment in advance shallow pass, preheated nip roll 1 and roller-way；
(2), mobile push rod dolly, adjusts top 2 front-extending quantities, separately takes a preheated magnesium alloy bar 3 to be put into roller-way
In, magnesium alloy bar 3 is pushed punch block roll 1 and nips by push rod, and magnesium alloy bar 3 is carried out in the presence of roll 1 is with top 2
Magnesium alloy bar roll piercing；
(3), after, perforation finishes, push rod agv controller is recalled rapidly so that the seamless magnesium-alloy tube after boring a hole departs from top
Bar 2, then seamless magnesium alloy hollow billet is placed on refrigeration bench frame and is air cooled to room temperature；
(4), by the seamless magnesium alloy hollow billet topping after air cooling and afterbody, remain subsequent production seamless magnesium alloy finished product
Pipe.
A diameter of Φ 40mm of the seamless magnesium-alloy tube being obtained after roll piercing, pipe thickness is 5.5mm, in the operation of rolling
Seamless magnesium-alloy tube cracking phenomena does not occur, such as Fig. 8 is seamless magnesium-alloy tube microcosmic grain morphology SEM after the present embodiment one rolling
Shown in figure, analyze this figure and learn that rolling rear average grain size is 4.2 μm, meets the actual demand of engineering.
Embodiment two
A kind of minor diameter is seamless magnesium-alloy tube oblique roll process, is carried out successively using following steps：
Identical with above-described embodiment one, set up constitutive equation and rolling model successively, roll in final determination the present embodiment two
Technological parameter processed is：Rolling temperature is 400 DEG C, and top head front-extending quantity is 20mm, selects feed angle to be 7 °, come directly towards a diameter of Φ
30mm, pore throat a diameter of Φ 35mm, roll rotational speed are 170rpm.
(3), roll piercing
I. the stage to be perforated
(1), first internal point Φ 15mm × 15mm is beaten in magnesium alloy bar front end, then magnesium alloy bar is put into heating
Preheat in stove, preheating temperature is 420 DEG C, temperature retention time is 1.5 hours, makes bar epidermis identical with center portion temperature, remains oblique milling
The perforation stage uses；
(2), start roll piercing unit, and rolling technological parameter is set according to rolling model；
II. the roll piercing stage
(1), equipment preheating：Start electrical control cabinet, make roll idle running appropriate time；Preheated nip roll and roller-way：Before taking, step is pre-
A magnesium alloy bar after heat does not use top to carry out punishment in advance shallow pass, preheated nip roll and roller-way；
(2), mobile push rod dolly, adjusts top head front-extending quantity, separately takes a preheated magnesium alloy bar to be put in roller-way,
Bar is pushed punch block roll and nips by push rod, and magnesium alloy bar carries out magnesium alloy bar oblique milling in the presence of roll is with top
Perforation；
(3), after, perforation finishes, push rod agv controller is recalled rapidly so that the seamless magnesium-alloy tube after boring a hole departs from top
Bar, then seamless magnesium alloy hollow billet is placed on refrigeration bench frame and is air cooled to room temperature；
(4), by the seamless magnesium alloy hollow billet topping after air cooling and afterbody, remain subsequent production seamless magnesium alloy finished product
Pipe.
A diameter of Φ 40mm of the seamless magnesium-alloy tube being obtained after roll piercing, pipe thickness is 5.5mm, in the operation of rolling
Seamless magnesium-alloy tube cracking phenomena does not occur, such as Fig. 9 is seamless magnesium-alloy tube microcosmic grain morphology SEM after the present embodiment two rolling
Shown in figure, analyze this figure and learn that rolling rear average grain size is 3.1 μm, meets the actual demand of engineering.
Embodiment three
A kind of minor diameter is seamless magnesium-alloy tube oblique roll process, is carried out successively using following steps：
Identical with above-described embodiment one, set up constitutive equation and rolling model successively, final determination the present embodiment three rolls
Technological parameter is：Rolling temperature is 500 DEG C, and top head front-extending quantity is 25mm, select feed angle to be 10 °, come directly towards a diameter of Φ 30mm,
Pore throat a diameter of Φ 35mm, roll rotational speed are 200rpm.
(3), roll piercing
I. the stage to be perforated
(1), first internal point Φ 15mm × 15mm is beaten in magnesium alloy bar front end, then magnesium alloy bar is put into heating
Preheat in stove, preheating temperature is 450 DEG C, temperature retention time is 2 hours, makes bar epidermis identical with center portion temperature, remains oblique milling and wear
The hole stage uses；
(2), start roll piercing unit, and rolling technological parameter is set according to rolling model；
II. the roll piercing stage
(1), equipment preheating：Start electrical control cabinet, make roll idle running appropriate time；Preheated nip roll and roller-way：Before taking, step is pre-
A magnesium alloy bar after heat does not use top to carry out punishment in advance shallow pass, preheated nip roll and roller-way；
(2), mobile push rod dolly, adjusts top head front-extending quantity, separately takes a preheated magnesium alloy bar to be put in roller-way,
Bar is pushed punch block roll and nips by push rod, and magnesium alloy bar carries out magnesium alloy bar oblique milling in the presence of roll is with top
Perforation；
(3), after, perforation finishes, push rod agv controller is recalled rapidly so that the seamless magnesium-alloy tube after boring a hole departs from top
Bar, then seamless magnesium alloy hollow billet is placed on refrigeration bench frame and is air cooled to room temperature；
(4), by the seamless magnesium alloy hollow billet topping after air cooling and afterbody, remain subsequent production seamless magnesium alloy finished product
Pipe.
A diameter of Φ 40mm of the seamless magnesium-alloy tube being obtained after roll piercing, pipe thickness is 5.5mm, in the operation of rolling
Seamless magnesium-alloy tube cracking phenomena does not occur, such as Figure 10 is seamless magnesium-alloy tube microcosmic grain morphology after the present embodiment three rolling
Shown in SEM figure, analyze this figure and learn that rolling rear average grain size is 3.4 μm, meets the actual demand of engineering.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Be familiar with those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (5)
1. a kind of seamless magnesium-alloy tube oblique roll process of minor diameter is it is characterised in that carried out successively using following steps：
(1), set up constitutive equation
Under the conditions of extruded Magnesium Alloy being carried out with different distortion by Gleeble thermal simulation experiment machine, isotherm compression is tested, and obtains
Magnesium alloy true stress and strain curve at different conditions, builds constitutive equation as follows：
In formula：R gas constant, R=8.314J/ (mol K)；
T absolute temperature, unit is K；
Strain rate, unit is s-1；
σ flow stress, unit is MPa；
(2), set up rolling model
Use Deform finite element software, using different temperatures, front-extending quantity, pore throat diameter carries out seamless magnesium-alloy tube perforation procedure mould
Intend, finally determine rolling technological parameter；
(3), roll piercing
I. the stage to be perforated
(1), first internal point Φ 15mm × 15mm is beaten in magnesium alloy bar front end, then put into magnesium alloy bar in heating furnace
Preheating, preheating temperature is 400～450 DEG C, and temperature retention time is 1～2 hour, makes magnesium alloy bar epidermis identical with center portion temperature,
Remain the use of roll piercing stage；
(2), start roll piercing unit, and rolling technological parameter is set according to rolling model；
II. the roll piercing stage
(1), equipment preheating：Start electrical control cabinet, make roll idle running appropriate time；Preheated nip roll and roller-way：After step preheating before taking
A magnesium alloy bar do not use top to carry out punishment in advance shallow pass, preheated nip roll and roller-way；
(2), mobile push rod dolly, adjusts top head front-extending quantity, separately takes a preheated magnesium alloy bar to be put in roller-way, push rod
Magnesium alloy bar is pushed punch block roll nip, it is oblique that magnesium alloy bar carries out magnesium alloy bar in the presence of roll is with top
Roll perforation；
(3), after, perforation finishes, push rod agv controller is recalled rapidly so that the seamless magnesium-alloy tube after boring a hole departs from push rod, so
Afterwards seamless magnesium alloy hollow billet is placed on refrigeration bench frame and is air cooled to room temperature；
(4), by the seamless magnesium alloy hollow billet topping after air cooling and afterbody, remain subsequent production seamless magnesium alloy production tube.
2. a kind of seamless magnesium-alloy tube oblique roll process of minor diameter according to claim 1 it is characterised in that：Described right will
(2) step in 1 is asked to be：The parameter that constitutive equation is determined imports in Deform-3D material depot, defines magnesium alloy materials attribute,
Final determination rolling technological parameter.
3. a kind of seamless magnesium-alloy tube oblique roll process of minor diameter according to claim 1 and 2 it is characterised in that：Determine tiltedly
Roll process parameter is：Rolling temperature is 350～500 DEG C, and top head front-extending quantity is 15～25mm, selects feed angle to be 6 °～10 °, push up
A diameter of Φ 30mm, pore throat a diameter of Φ 34mm or Φ 35mm, roll rotational speed are 90～200rpm.
4. a kind of seamless magnesium-alloy tube oblique roll process of minor diameter according to claim 3 it is characterised in that：Determine optimum
Oblique roll process parameter is：Rolling temperature is 400 DEG C, and top head front-extending quantity is 20mm, selects feed angle to be 7 °, come directly towards a diameter of Φ
30mm, pore throat a diameter of Φ 34mm or Φ 35mm, roll rotational speed are 170rpm.
5. a kind of seamless magnesium-alloy tube oblique roll process of minor diameter according to claim 1 it is characterised in that：After roll piercing
A diameter of Φ 40mm of prepared seamless magnesium-alloy tube, pipe thickness is 5.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638867.9A CN106391714B (en) | 2016-08-06 | 2016-08-06 | Small-diameter seamless magnesium alloy pipe skew rolling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638867.9A CN106391714B (en) | 2016-08-06 | 2016-08-06 | Small-diameter seamless magnesium alloy pipe skew rolling process |
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| CN106391714B CN106391714B (en) | 2020-08-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107096804A (en) * | 2017-06-09 | 2017-08-29 | 苏州双金实业有限公司 | A kind of preparation method of stainless steel seamless pipe |
| CN110947785A (en) * | 2019-12-12 | 2020-04-03 | 太原科技大学 | Tubing extrusion die of Gleeble thermal simulation testing machine and use method thereof |
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| CN104759483A (en) * | 2015-03-26 | 2015-07-08 | 太原科技大学 | Production technique of magnesium alloy plate |
| CN204779708U (en) * | 2015-06-10 | 2015-11-18 | 沈阳大吉实业有限公司 | Cross piercing pipe alloy bar ejecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107096804A (en) * | 2017-06-09 | 2017-08-29 | 苏州双金实业有限公司 | A kind of preparation method of stainless steel seamless pipe |
| CN110947785A (en) * | 2019-12-12 | 2020-04-03 | 太原科技大学 | Tubing extrusion die of Gleeble thermal simulation testing machine and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN106391714B (en) | 2020-08-04 |
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