CN113172106A - Die-overlapping drawing process of nickel-based superalloy small-diameter thin-wall seamless tube - Google Patents
Die-overlapping drawing process of nickel-based superalloy small-diameter thin-wall seamless tube Download PDFInfo
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- CN113172106A CN113172106A CN202110514698.9A CN202110514698A CN113172106A CN 113172106 A CN113172106 A CN 113172106A CN 202110514698 A CN202110514698 A CN 202110514698A CN 113172106 A CN113172106 A CN 113172106A
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- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- 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
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
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Abstract
The invention provides a die-stack drawing process of a nickel-based superalloy small-diameter thin-wall seamless pipe, which is characterized in that two drawing dies with different sizes are closely arranged before and after matching, so that the drawing pass of the small-diameter thin-wall superalloy seamless pipe is reduced, the production efficiency is improved, and the production cost is reduced; meanwhile, the defects of surface scratch caused by shaking and deviation caused by small contact area between the pipe and the surface of the die in the single-die drawing process, stacking, crease, uneven wall thickness and the like caused by large deformation of a single pass are avoided, and the yield of the pipe is improved.
Description
Technical Field
The invention relates to the field of production and processing of metal seamless pipes, in particular to a die-stack drawing process of a nickel-based superalloy small-diameter thin-wall seamless pipe.
Background
At present, the high-temperature alloy, especially the nickel-based high-temperature alloy, is widely applied to manufacturing thermal parts of aircraft engines and various gas turbines, such as working blades, guide hot fins, turbine discs, combustion chambers of turbine parts, solar power generation capillaries, transmission pipes for satellite thrusters, high-temperature steam transmission pipelines and condenser pipes of power plants, hot gas conduits and other components, and has wide application prospects in the fields of aerospace, nuclear energy, petrochemical industry and metallurgy. The alloy has high working temperature, stable structure, less harmful phases and good oxidation and heat corrosion resistance, and can work under the conditions of higher temperature and stress, thereby occupying an important position in high-temperature alloy.
However, since the alloy contains alloying elements such as aluminum, titanium and niobium, a large amount of intermetallic strengthening phases are formed during high-temperature aging, so that the alloy is strengthened, the ductility and toughness are reduced, and the workability of the material is lowered. Therefore, the key control point for the application of the alloy is the product performance and the surface quality after the production process for the small-diameter thin-wall high-temperature alloy seamless tube is processed and formed.
The drawing of the metal pipe refers to a plastic processing method for obtaining a product with a required shape and size by the pipe through a die hole of a drawing die under the action of external tension, the wall thickness is an important control index in the production process of the metal seamless pipe, particularly the production process of the metal seamless thin-walled pipe, and the thin-walled pipe refers to that the ratio D/S of the outer diameter (D) and the wall thickness (S) of the pipe is more than or equal to 30; according to the traditional production mode, a single-pass single-die drawing process is generally adopted in the production process of the seamless pipe, the production passes are multiple, the time consumption is long, the production cost is high, and the defects of stacking, crease marks, uneven wall thickness and the like are caused by the fact that the surface of the pipe is shaken and deviated due to small contact surface with the die in the drawing process.
The die-stack drawing process is commonly used in the drawing process of metal wires, the purposes of reducing production passes and improving production efficiency are realized by a production mode of continuous twice deformation in a single pass, but in the production process of metal seamless pipes, the outer diameter size and the wall thickness need to be synchronously controlled, and the process requirement is high.
Disclosure of Invention
In view of the above, the invention provides a die-stack drawing process for a small-diameter thin-wall seamless tube made of a nickel-based superalloy, which aims to solve the problems generated in the production process of the small-diameter thin-wall seamless tube made of the nickel-based superalloy, and the process can effectively improve the production efficiency of the small-diameter thin-wall seamless tube made of the nickel-based superalloy, reduce the production cost, avoid the defects of stacking, crease marks, uneven wall thickness and the like caused by the shaking and deviation generated in the drawing process due to the small contact surface between the surface of the tube and a single die, and improve the yield of products.
In order to achieve the aim, the invention provides a die-stack drawing process of a small-diameter thin-wall seamless tube made of nickel-based superalloy, which comprises the following steps:
(1) when the outer diameter of the pipe is phi 6.0mm and the wall thickness is 0.15mm-0.2mm, the diameter of the front end die inlet is phi 5.2mm, the diameter of the rear end die inlet is phi 4.0mm, the single-pass pipe deformation is 28-30%, the drawing speed is 1.8-2.0m/min, and the outer diameter of the obtained pipe is phi 4.0mm and the wall thickness is 0.1mm-0.13 mm;
(2) when the outer diameter of the pipe is phi 4.0mm and the wall thickness is 0.1mm-0.13mm, the diameter of the front-end die inlet is phi 3.6mm, the diameter of the rear-end die inlet is phi 3.0mm, the single-pass pipe deformation is 18-20%, the drawing speed is 1.5-1.8m/min, and the obtained pipe has the outer diameter of phi 3.0mm and the wall thickness of 0.075mm-0.1 mm;
(3) when the outer diameter of the pipe is phi 3.0mm and the wall thickness is 0.075mm-0.1mm, the diameter of the inlet of the front-end die is phi 2.7mm, and the diameter of the inlet of the rear-end die is: phi is 2.2mm, the deformation of the single-pass tube is 18-20%, the drawing speed is 1.3-1.5m/min, the outer diameter of the obtained tube is phi 2.2mm, and the wall thickness is 0.050mm-0.073 mm;
(4) when the outer diameter of the pipe is phi 2.2mm and the wall thickness is 0.050mm-0.073mm, the diameter of the inlet of the front-end die is phi 2.05mn, the diameter of the inlet of the rear-end die is phi 1.8mm, the deformation of the single-pass pipe is 18-22%, the drawing speed is 1.0-1.3m/min, the outer diameter of the obtained pipe is phi 1.8, and the wall thickness is 0.045mm-0.60 mm;
(5) when the outer diameter of the pipe is phi 1.80mm and the wall thickness is 0.045mm-0.060mm, the diameter of the front end die inlet is phi 1.6mm, the diameter of the rear end die inlet is 1.35mm, the single-pass pipe deformation is 18-22%, the drawing speed is 0.5-1.0m/min, and the pipe with the outer diameter of phi 1.35mm and the wall thickness of 0.034mm-0.045mm is obtained.
The invention has the beneficial effects that:
the invention provides a die-stack drawing process of a nickel-based superalloy small-diameter thin-wall seamless tube, which adopts two drawing dies with different sizes which are tightly arranged in front and at the back, and the diameter of an inlet of a front-end die is larger than that of a rear-end die; compared with the prior art, the process can reduce the drawing pass of the small-diameter thin-wall high-temperature alloy seamless pipe, improve the production efficiency, reduce the production cost, and simultaneously reduce the surface scratches caused by the shake and the offset generated by small contact area between the pipe and the surface of the die in the single-die drawing process; the die-stacking drawing is characterized in that the pipe continuously generates twice deformation in the same pass, and the defects of stacking, crease, uneven wall thickness and the like caused by large deformation in a single pass of the traditional single-die drawing can be effectively avoided, so that the yield of the pipe is improved.
Detailed Description
Example 1
When the outer diameter of the pipe is phi 6mm and the wall thickness is 0.2mm, the diameter of the inlet of the front end die is phi 5.2mm, the diameter of the inlet of the rear end die is phi 4mm, the deformation of the pipe is 28%, and the drawing speed is 2m/min, so that the outer diameter of the pipe is phi 4mm and the wall thickness is 0.13 mm.
Example 2
When the outer diameter of the pipe is phi 3.0mm and the wall thickness is 0.1mm, the diameter of the front end die inlet is phi 2.7mn, the diameter of the rear end die inlet is phi 2.2mm, the single-pass pipe deformation is 18.7%, the drawing speed is 1.3m/min, the outer diameter of the obtained pipe is phi 2.2, and the wall thickness is 0.05 mm.
Claims (1)
1. The invention provides a die-stack drawing process of a nickel-based superalloy small-diameter thin-wall seamless tube, which is characterized by comprising the following steps of:
the pipe continuously passes through two drawing dies which are closely arranged front and back,
(1) when the outer diameter of the pipe is phi 6.0mm and the wall thickness is 0.15mm-0.2mm, the diameter of the front end die inlet is phi 5.2mm, the diameter of the rear end die inlet is phi 4.0mm, the single-pass pipe deformation is 28-30%, the drawing speed is 1.8-2.0m/min, and the outer diameter of the obtained pipe is phi 4.0mm and the wall thickness is 0.1mm-0.13 mm;
(2) when the outer diameter of the pipe is phi 4.0mm and the wall thickness is 0.1mm-0.13mm, the diameter of the front-end die inlet is phi 3.6mm, the diameter of the rear-end die inlet is phi 3.0mm, the single-pass pipe deformation is 18-20%, the drawing speed is 1.5-1.8m/min, and the obtained pipe has the outer diameter of phi 3.0mm and the wall thickness of 0.075mm-0.1 mm;
(3) when the outer diameter of the pipe is phi 3.0mm and the wall thickness is 0.075mm-0.1mm, the diameter of the inlet of the front-end die is phi 2.7mm, and the diameter of the inlet of the rear-end die is: phi is 2.2mm, the deformation of the single-pass pipe is 18-20%, the drawing speed is 1.3-1.5m/min, the outer diameter of the obtained pipe is phi 2.2mm, and the wall thickness is 0.055mm-0.073 mm;
(4) when the outer diameter of the pipe is phi 2.2mm and the wall thickness is 0.055mm-0.073mm, the diameter of the inlet of the front-end die is phi 2.05mn, the diameter of the inlet of the rear-end die is phi 1.8mm, the deformation of the single-pass pipe is 18-22%, the drawing speed is 1.0-1.3m/min, the outer diameter of the obtained pipe is phi 1.8, and the wall thickness is 0.045mm-0.60 mm;
(5) when the outer diameter of the pipe is phi 1.80mm and the wall thickness is 0.045mm-0.060mm, the diameter of the front end die inlet is phi 1.6mm, the diameter of the rear end die inlet is 1.35mm, the single-pass pipe deformation is 18-22%, the drawing speed is 0.5-1.0m/min, and the pipe with the outer diameter of phi 1.35mm and the wall thickness of 0.034mm-0.045mm is obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110514698.9A CN113172106A (en) | 2021-05-12 | 2021-05-12 | Die-overlapping drawing process of nickel-based superalloy small-diameter thin-wall seamless tube |
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| CN202110514698.9A CN113172106A (en) | 2021-05-12 | 2021-05-12 | Die-overlapping drawing process of nickel-based superalloy small-diameter thin-wall seamless tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690705A (en) * | 2021-08-25 | 2021-11-23 | 苏州鸿康未徕智能科技有限公司 | Production process of high-precision USB TYPE-C shell |
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| CN111922105A (en) * | 2020-06-01 | 2020-11-13 | 广东和胜工业铝材股份有限公司 | Pipe drawing die and drawing process |
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2021
- 2021-05-12 CN CN202110514698.9A patent/CN113172106A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102489536A (en) * | 2011-11-29 | 2012-06-13 | 北京科技大学 | Method for efficiently forming pure copper capillary tubes by continuous casting and drawing |
| CN106825110A (en) * | 2017-03-17 | 2017-06-13 | 郑州大学 | A kind of intravascular stent method for processing forming of kirsite thin footpath thin-walled capillary tubing |
| CN207086585U (en) * | 2017-09-02 | 2018-03-13 | 淄博通光都金属科技有限公司 | A kind of integral type drawing mould of secondary reducing aluminium-alloy pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690705A (en) * | 2021-08-25 | 2021-11-23 | 苏州鸿康未徕智能科技有限公司 | Production process of high-precision USB TYPE-C shell |
| CN113690705B (en) * | 2021-08-25 | 2024-04-19 | 苏州鸿康未徕智能科技有限公司 | Production process of high-precision USB TYPE-C shell |
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