CN111804747A - Fine drawing process of small-diameter thin-wall nickel base pipe - Google Patents
Fine drawing process of small-diameter thin-wall nickel base pipe Download PDFInfo
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- CN111804747A CN111804747A CN202010656424.9A CN202010656424A CN111804747A CN 111804747 A CN111804747 A CN 111804747A CN 202010656424 A CN202010656424 A CN 202010656424A CN 111804747 A CN111804747 A CN 111804747A
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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
- B21C5/00—Pointing; Push-pointing
- B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube
-
- 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
- B21C9/00—Cooling, heating or lubricating drawing material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention provides a fine drawing process of a small-diameter thin-wall nickel base pipe, which comprises the following steps: 1) heading a nickel-based pipe; 2) cold-drawing the pipe; 3) heating and annealing the pipe; 4) repeating the step 2) and the step 3) to carry out cold drawing and heating annealing on the pipe for multiple times; 5) carrying out solution treatment on the finished pipe obtained in the step 4) in a protective gas atmosphere, and then cooling; 6) straightening the pipe obtained in the step 5), cutting the head and the tail, inspecting, detecting, cutting to length, packaging and warehousing. The fine drawing process of the small-diameter thin-wall nickel-based tube has high process operability, adopts resistance type heating annealing, reasonably controls the clamping position, reduces cold deformation stress due to heat conduction of the tube material at the position close to the heading position, and prevents the breakage of the thin-wall nickel-based tube in the cold drawing process.
Description
Technical Field
The invention relates to the technical field of nickel-based tube manufacturing, in particular to a fine drawing process of a small-diameter thin-wall nickel-based tube.
Background
The nickel-based pipe is widely applied to heat exchangers due to excellent comprehensive mechanical properties, high temperature resistance and corrosion resistance, and particularly in the field of nuclear power, nuclear power energy is adopted along with the design of small ships, power plants and even civil small equipment, so that the demand of the thin-wall nickel-based pipe is increased; the common precision tube is manufactured by cold rolling or cold drawing, and the small-diameter thin-wall nickel base tube is almost impossible to manufacture by cold rolling; if cold-drawing deformation is adopted, the key technical bottleneck is that the forming cannot be performed due to the broken end, so that a fine drawing process of a small-diameter thin-wall nickel base pipe is urgently needed.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art and provide a fine drawing process of a small-diameter thin-wall nickel base pipe, which enables the pipe to have excellent tissue compactness and the thin-wall pipe to be difficult to break in the drawing process. The technical scheme adopted by the invention is as follows:
a fine drawing process of a small-diameter thin-wall nickel base pipe comprises the following steps: the method comprises the following steps:
1) heading a nickel-based pipe material with phi (10-16) × (0.8-1.0) mm, wherein the heading length is 130-180 mm, and the heading diameter is 4-9 mm;
2) cold-drawing the pipe obtained in the step 1);
3) heating and annealing the pipe in the step 2), wherein the annealing temperature is 980-1050 ℃, and the heat preservation is carried out for 10-15S;
4) repeating the step 2) and the step 3) to carry out cold drawing and heating annealing on the pipe for multiple times;
5) carrying out solution treatment on the finished pipe obtained in the step 4) in a protective gas atmosphere, and then cooling;
6) straightening the pipe obtained in the step 5), cutting the head and the tail, inspecting, detecting, cutting to length, packaging and warehousing.
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: and controlling the cold-drawing elongation coefficient to be less than 1.3 in the step 2) and the step 4).
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: and (3) carrying out heating annealing in the step 4) in a resistance-type heating annealing furnace, wherein a head clamping block and a tail clamping block are arranged in the resistance-type heating annealing furnace, the head clamping block is clamped at a position 30-40 mm away from the tail end of the head, the tail clamping block is clamped at a position 10-20 mm away from the tail end of the pipe, and air cooling is carried out after annealing.
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: the solid solution treatment in the step 5) is specifically as follows: the temperature is controlled to be 1060-1090 ℃, the heat preservation time is controlled to be 2-3S/min, and the protective gas is pure hydrogen.
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: and 6) straightening speed is 3-5 m/min.
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: in the cold drawing process of the step 1) and the step 4) in the step 5), the cold drawing speed is controlled to be 3-8 m/min.
Preferably, the fine drawing process of the small-diameter thin-wall nickel base pipe comprises the following steps: the size of the finished pipe in the step 5) is phi 4.5-6 multiplied by 0.45-0.5 mm.
The invention has the advantages that:
(1) the fine drawing process of the small-diameter thin-wall nickel base pipe has high process operability, adopts resistance type heating annealing, reasonably controls the holding position, reduces cold deformation stress due to heat conduction of the pipe material at the position close to the head beating position, has higher strength than the middle part of the pipe material, and solves the key problem of head breakage in the cold drawing process of the thin-wall nickel base pipe; the resistance type heating annealing heat preservation time is short, the surface only forms an oxide film without influencing the subsequent drawing, and the acid washing process in the conventional manufacturing method is reduced.
(2) The fine drawing process of the small-diameter thin-wall nickel base pipe controls the cold drawing elongation coefficient to be less than 1.3, so that the pipe has excellent tissue compactness, the thin-wall pipe is not easy to break in the drawing process, and the finished pipe adopts pure hydrogen atmosphere to protect the solution treatment to form a bright protective film, so that the pipe has excellent surface sense and the acid washing process is also reduced.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1:
a fine drawing process of a small-diameter thin-wall nickel base pipe comprises the following steps:
1) selecting a solid solution state N06600 nickel-based pipe material with the specification of phi 16 multiplied by 1mm, and heading, wherein the heading length is 130mm, and the heading diameter is 9 mm;
2) carrying out primary cold drawing on the pipe obtained in the step 1) until the pipe is drawn to phi 14 multiplied by 0.85mm, and then carrying out resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 15S at the temperature of over 980 ℃;
3) performing secondary cold drawing on the pipe obtained in the step 2) until the pipe is drawn to phi 12 multiplied by 0.75mm, and then performing resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 15S at the temperature of over 980 ℃;
4) cold-drawing the pipe obtained in the step 3) for three times to phi 10 multiplied by 0.65mm, cutting the end of the pipe, heading the end with the length of 130mm and the heading diameter of 6mm, and then carrying out resistance type heating annealing on the pipe, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 15S at 980 ℃ or above;
5) cold-drawing the pipe obtained in the step 4) for four times until the diameter is 8 multiplied by 0.6mm, and then carrying out resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 15S at the temperature of over 980 ℃;
6) cold-drawing the pipe obtained in the step 5) for five times until the diameter is 7 multiplied by 0.55mm, and then carrying out resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 15S at the temperature of over 980 ℃;
7) cold drawing the pipe obtained in the step 6) for six times until the pipe is drawn to phi 6 multiplied by 0.5mm, carrying out solid solution treatment under the protection of pure hydrogen, controlling the temperature at 1090 ℃ and the heat preservation time at 1min, and then cooling by a water cooling jacket;
8) and (4) straightening the pipe obtained in the step (7), wherein a straightening roller is a hard polyurethane rubber roller, the straightening speed is 5m/min, and then cutting the head and the tail, inspecting, detecting, cutting to length, packaging and warehousing.
In the resistance type heating annealing of the step 2), the step 3), the step 4), the step 5) and the step 6), the head clamping block is clamped at a position 30mm away from the tail end of the head, the tail clamping block is clamped at a position 10mm away from the tail end of the pipe, and the pipe is cooled by air cooling after annealing.
Step 2) primary cold drawing, step 3) secondary cold drawing, step 4) tertiary cold drawing, step 5) quartic cold drawing, step 6) quintic cold drawing, and step 7) six-time cold drawing, wherein the finished product cold drawing speed is 5 m/min.
The N06600 thin-wall nickel-based tube manufactured by the embodiment has good surface and size quality and excellent performance, and basically has no drawing fracture.
Example 2:
a fine drawing process of a small-diameter thin-wall nickel base pipe comprises the following steps:
1) selecting a solid solution state N06600 nickel-based pipe material with the specification of phi 10 multiplied by 0.7mm, and heading, wherein the heading length is 180mm, and the heading diameter is 4 mm;
2) carrying out primary cold drawing on the pipe obtained in the step 1) until the pipe is drawn to phi 9 multiplied by 0.6mm, and then carrying out resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 5S at the temperature of over 980 ℃;
3) performing secondary cold drawing on the pipe obtained in the step 2) until the pipe is drawn to phi 8 multiplied by 0.55mm, and then performing resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 5S at the temperature of over 980 ℃;
4) cold-drawing the pipe obtained in the step 3) for three times to phi 7 multiplied by 0.5mm, cutting the end of the pipe, heading the end with the length of 180mm and the diameter of 6mm, and then carrying out resistance-type heating annealing on the pipe, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 5S at 980 ℃ or above;
5) cold-drawing the pipe obtained in the step 4) for four times until the diameter is 6 multiplied by 0.48mm, and then carrying out resistance type heating annealing, wherein the annealing temperature is controlled to be 980-1050 ℃, and the heat preservation time is 5S at the temperature of over 980 ℃;
6) cold drawing the pipe obtained in the step 5) for five times until the pipe is drawn to phi 5 multiplied by 0.45mm, then carrying out solution treatment on the pipe, controlling the temperature at 1060 ℃, controlling the heat preservation time at 0.9min, protecting the atmosphere in the furnace by pure hydrogen, and cooling by a water cooling jacket;
7) straightening the pipe obtained in the step 6), wherein a straightening roller is a hard polyurethane rubber roller, the straightening speed is 3m/min, and then cutting the head and the tail, inspecting, cutting to length, packaging and warehousing.
In all resistance type heating annealing in the resistance type heating annealing of the step 2), the step 3), the step 4) and the step 5), the head clamping block is added and held 40mm away from the tail end of the driving head, and the tail clamping block is added and held 20mm away from the tail end of the pipe; and after annealing, cooling by air cooling.
Step 2) primary cold drawing, step 3) secondary cold drawing, step 4) tertiary cold drawing, step 5) quartic cold drawing, wherein the cold drawing speed is 8m/min, and the finished product cold drawing speed in the step 6) quintic cold drawing process is 3 m/min.
The N06600 thin-wall nickel-based tube manufactured by the method has good surface and size quality and excellent performance, and avoids the condition of tube drawing fracture.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. The fine drawing process of the small-diameter thin-wall nickel base pipe is characterized by comprising the following steps of: the method comprises the following steps:
1) heading a nickel-based pipe material with phi (10-16) × (0.8-1.0) mm, wherein the heading length is 130-180 mm, and the heading diameter is 4-9 mm;
2) cold-drawing the pipe obtained in the step 1);
3) heating and annealing the pipe in the step 2), wherein the annealing temperature is 980-1050 ℃, and the heat preservation is carried out for 10-15S;
4) repeating the step 2) and the step 3) to carry out cold drawing and heating annealing on the pipe for multiple times;
5) carrying out solution treatment on the finished pipe obtained in the step 4) in a protective gas atmosphere, and then cooling;
6) straightening the pipe obtained in the step 5), cutting the head and the tail, inspecting, detecting, cutting to length, packaging and warehousing.
2. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: and controlling the cold-drawing elongation coefficient to be less than 1.3 in the step 2) and the step 4).
3. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: and (3) carrying out heating annealing in the step 4) in a resistance-type heating annealing furnace, wherein a head clamping block and a tail clamping block are arranged in the resistance-type heating annealing furnace, the head clamping block is clamped at a position 30-40 mm away from the tail end of the head, the tail clamping block is clamped at a position 10-20 mm away from the tail end of the pipe, and air cooling is carried out after annealing.
4. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: the solid solution treatment in the step 5) is specifically as follows: the temperature is controlled to be 1060-1090 ℃, the heat preservation time is controlled to be 2-3S/min, and the protective gas is pure hydrogen.
5. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: and 6) straightening speed is 3-5 m/min.
6. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: in the cold drawing process of the step 1) and the step 4) in the step 5), the cold drawing speed is controlled to be 3-8 m/min.
7. The fine drawing process of the small-diameter thin-walled nickel-based tube of claim 1, characterized in that: the size of the finished pipe in the step 5) is phi 4.5-6 multiplied by 0.45-0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656424.9A CN111804747B (en) | 2020-07-09 | 2020-07-09 | Fine drawing process of small-diameter thin-wall nickel base pipe |
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| CN202010656424.9A CN111804747B (en) | 2020-07-09 | 2020-07-09 | Fine drawing process of small-diameter thin-wall nickel base pipe |
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| CN111804747B CN111804747B (en) | 2021-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845637A (en) * | 2020-12-29 | 2021-05-28 | 江苏正和实业集团有限公司 | Multistage cold drawing process for thin-wall small-diameter aluminum pipe |
| CN114603312A (en) * | 2020-12-09 | 2022-06-10 | 常州市联谊特种不锈钢管有限公司 | Production process of high-precision magnetic isolation sleeve |
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Cited By (3)
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| CN114603312A (en) * | 2020-12-09 | 2022-06-10 | 常州市联谊特种不锈钢管有限公司 | Production process of high-precision magnetic isolation sleeve |
| CN114603312B (en) * | 2020-12-09 | 2024-04-30 | 常州市联谊特种不锈钢管有限公司 | Production process of high-precision magnetism isolating sleeve |
| CN112845637A (en) * | 2020-12-29 | 2021-05-28 | 江苏正和实业集团有限公司 | Multistage cold drawing process for thin-wall small-diameter aluminum pipe |
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| CN111804747B (en) | 2021-12-03 |
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