CN112296617A - Production method of high-fin cupronickel alloy high-efficiency tube - Google Patents
Production method of high-fin cupronickel alloy high-efficiency tube Download PDFInfo
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- CN112296617A CN112296617A CN202011094863.1A CN202011094863A CN112296617A CN 112296617 A CN112296617 A CN 112296617A CN 202011094863 A CN202011094863 A CN 202011094863A CN 112296617 A CN112296617 A CN 112296617A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- 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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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Abstract
The invention relates to a production method of a high-fin cupronickel alloy high-efficiency tube, which comprises the following steps: casting, surface milling, planetary rolling, primary stretching, secondary stretching, tertiary stretching, annealing in a middle cover furnace, coiling, online annealing, unreeling, straightening and cutting to length, rolling fins, cleaning, rinsing, blowing and drying, stress relief heat treatment, straightening, sizing, inspection and warehousing. The invention has the advantages of high feasibility of the production method, high yield and the like.
Description
Technical Field
The invention belongs to the technical field of manufacturing of an outer surface reinforced copper alloy efficient tube, and particularly relates to a method for manufacturing a high-fin cupronickel alloy efficient tube, wherein the ratio of the height of a fin to the thickness of a bottom wall of the high-fin cupronickel alloy efficient tube exceeds 2.
Background
The BFe10-1-1 cupronickel alloy high-efficiency tube is widely applied to air conditioners and heat exchangers, the heat exchange efficiency can be greatly improved, the higher the fin height is, the higher the heat exchange efficiency is, the more compact and large-scale equipment is, but the high-efficiency tube with the fin height/bottom wall thickness exceeding 2 is a threshold for manufacturing the high-efficiency tube, the cracking probability after fin rolling is high, and particularly for the copper alloy which is a material with relatively high strength and relatively low plasticity, a BFe10-1-1 cupronickel alloy outer surface reinforced high-fin high-efficiency tube production method which is feasible in operation and high in success rate is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel anti-counterfeiting method.
According to the technical scheme provided by the invention, the production method of the high-fin cupronickel alloy high-efficiency tube comprises the following steps:
obtaining a blank which is made of BFe10-1-1, has an outer diameter and an outer diameter tolerance of 90 +/-2.50 mm and a wall thickness tolerance of 25 +/-1.50 mm by fusion casting, wherein the casting adopts semi-continuous casting;
secondly, milling the blank obtained in the step one, wherein the milling thickness is controlled to be 0.8-1.0 mm;
thirdly, planetary rolling is carried out on the blank obtained in the second step, and the blank is rolled to a tube blank with the tolerance of the outer diameter and the outer diameter being 49 +/-1.5 mm and the tolerance of the wall thickness and the wall thickness being 2.5 +/-0.3 mm;
fourthly, stretching the tube blank obtained in the third step for the first time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 42 +/-1.2 mm and the tolerance of the wall thickness and the wall thickness of 2.2 +/-0.07 mm;
fifthly, performing secondary drawing on the tube blank obtained in the step four to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 37 +/-1.1 mm and the tolerance of the wall thickness and the wall thickness of 1.9 +/-0.06 mm;
sixthly, stretching the tube blank obtained in the step five for the third time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 32 +/-1 mm and the tolerance of the wall thickness and the wall thickness of 1.7 +/-0.05 mm;
seventhly, performing middle cover furnace annealing on the tube blank obtained in the step six, wherein the annealing temperature is controlled to be 700-730 ℃, and the annealing time is controlled to be 50-70 min;
(eighth), performing disc drawing on the tube blank obtained in the step (seventh), wherein the disc drawing is performed to the tube blank with the outer diameter of 15-25 mm and the wall thickness of 1.0-1.5 mm, and the disc winding diameter is controlled to be 4-5 m;
carrying out online annealing on the tube blank obtained in the step (eight), wherein the annealing temperature is controlled to be 720-750 ℃, the annealing time is controlled to be 20-30 s, and the winding diameter is controlled to be 4-5 m;
step ten, unwinding, straightening and cutting to length the pipe blank obtained in the step nine;
step eleven, rolling fins on the tube blank obtained in the step eleven, wherein the height of the fins is controlled to be 1.45-1.55 mm, the thickness of the bottom wall of a rolled fin machining section is controlled to be 0.6-0.65 mm, and the tooth density of the fins is controlled to be 0.68-0.78 pcs/mm;
step twelve, cleaning, rinsing, blowing and drying the high-efficiency pipe obtained in the step eleven;
(thirteen) stress relief heat treatment is carried out on the high-efficiency tube obtained in the step (twelfth), the heat treatment temperature is controlled to be 550-720 ℃, and the heat preservation time is controlled to be 40-60 min;
and (fourteen), straightening, sizing, inspecting, packaging and warehousing the high-efficiency tube obtained in the step (thirteen).
Preferably, the content of each component of the BFe10-1-1 material used in the step (one) is adjusted as follows: 9.0 to 9.5 weight percent of nickel, 0.55 to 0.65 weight percent of manganese, 1.0 to 1.5 weight percent of iron, not more than 0.02 weight percent of lead, not more than 0.005 weight percent of phosphorus, not more than 0.008 weight percent of sulfur, not more than 0.05 weight percent of silicon, not more than 0.05 weight percent of zinc, not more than 0.005 weight percent of tin and the balance of copper.
Preferably, in the step (eight), when the total elongation coefficient of the coil drawing exceeds 2.0, one-time middle cover furnace annealing is added, the annealing temperature is controlled to be 700-730 ℃, and the annealing time is controlled to be 50-70 min.
Preferably, in the fin rolling in the step (eleventh), on the premise of ensuring the height of the fin, the thickness of the bottom wall of the processing section and the heat exchange area, the tooth density is increased and the height of the fin is reduced, and the tooth density is increased by 0.01pcs/mm when the height of the fin is reduced by 0.01 mm.
Compared with the prior art, the invention has the following advantages:
the invention provides a manufacturing process of a high-fin BFe10-1-1 high-efficiency tube, which has high process feasibility and high yield. By scientifically controlling the strengthening elements of nickel and manganese, impurity elements which have great influence on the cracking of the rolled fin are reduced, and the plasticity of the BFe10-1-1 copper alloy tube blank is improved; the manufacturing process of the copper alloy coil is introduced into the tube blank for producing the high-efficiency tube, the production efficiency is improved by times, the high-efficiency online annealing ensures that the high-efficiency tube has consistent plasticity of the mother tube, the internal stress and the structure are uniform, and good conditions are prepared for subsequent deformation; by combining the process, a large number of product flow-transfer procedures are reduced, the surface quality of the tube blank is excellent, and the problem of cracking of the high-fin BFe10-1-1 high-efficiency tube during fin rolling is basically solved. By increasing the diameter of the coiled and wound coil, the wall thickness uniformity is good, the defects of the coil manufacturing process are effectively avoided, and the size precision of the high-efficiency tube is effectively controlled; on the premise of ensuring the heat exchange area, the tooth density is matched with the fin height scientifically and quantitatively, so that the cracking condition is greatly reduced during fin rolling.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The production method of the high-fin cupronickel alloy high-efficiency tube comprises the following steps:
obtaining a blank with the material quality of BFe10-1-1, the tolerance of the outer diameter and the outer diameter of 90 +/-1.72 mm and the tolerance of the wall thickness and the wall thickness of 25 +/-0.88 mm by fusion casting, wherein the content of each component of the used BFe10-1-1 material is adjusted as follows: 9.26wt% of nickel, 0.606wt% of manganese, 1.21wt% of iron, 0.00487wt% of lead, 0.00296wt% of phosphorus, 0.00471wt% of sulfur, 0.001wt% of silicon, 0.0300wt% of zinc, 0.00135wt% of tin and the balance of copper; wherein the casting adopts semi-continuous casting;
secondly, milling the blank obtained in the first step, wherein the milling thickness is controlled to be 1.0 mm;
thirdly, planetary rolling is carried out on the blank obtained in the second step, and the blank is rolled to a tube blank with the tolerance of the outer diameter and the outer diameter being 49 +/-1.1 mm and the tolerance of the wall thickness and the wall thickness being 2.5 +/-0.1 mm;
fourthly, stretching the tube blank obtained in the third step for the first time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 42 +/-0.76 mm and the tolerance of the wall thickness and the wall thickness of 2.2 +/-0.06 mm;
fifthly, performing secondary drawing on the tube blank obtained in the step four to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 37 +/-0.62 mm and the tolerance of the wall thickness and the wall thickness of 1.9 +/-0.04 mm;
sixthly, stretching the tube blank obtained in the step five for the third time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 32 +/-1 mm and the tolerance of the wall thickness and the wall thickness of 1.7 +/-0.04 mm;
seventhly, performing middle cover furnace annealing on the tube blank obtained in the step six, wherein the annealing temperature is controlled at 700 ℃, and the annealing time is controlled at 70 min;
(eighth), performing disc drawing on the tube blank obtained in the step (seventh), wherein the disc drawing is performed to the tube blank with the outer diameter of 24.96-24.99 mm and the wall thickness of 1.47-1.49 mm, and the coiling diameter is controlled to be 5 m;
performing on-line annealing on the tube blank obtained in the step (eight), wherein the annealing temperature is controlled at 720 ℃, the annealing time is controlled at 30s, and the winding diameter is controlled at 5 m;
step ten, unwinding, straightening and cutting to length the pipe blank obtained in the step nine;
step eleven, rolling fins on the tube blank obtained in the step eleven, wherein the height of the fins is controlled to be 1.55mm, the thickness of the bottom wall of a rolled fin machining section is controlled to be 0.65mm, and the tooth density of the fins is 0.68 pcs/mm;
step twelve, cleaning, rinsing, blowing and drying the high-efficiency pipe obtained in the step eleven;
(thirteen) stress relief heat treatment is carried out on the high-efficiency tube obtained in the step (twelfth), the heat treatment temperature is controlled at 550 ℃, and the heat preservation time is controlled at 60 min;
and (fourteen), straightening, sizing, inspecting, packaging and warehousing the high-efficiency tube obtained in the step (thirteen).
The high-fin BFe10-1-1 cupronickel alloy high-efficiency tube produced by the embodiment is in a soft state, and the ratio of the fin height to the bottom wall thickness is 2.385; the surface cracking condition is avoided, the yield is high and reaches 90 percent.
Example 2
The production method of the high-fin cupronickel alloy high-efficiency tube comprises the following steps:
obtaining a blank with the material BFe10-1-1, the tolerance of the outer diameter and the outer diameter of 90 +/-1.56 mm and the tolerance of the wall thickness and the wall thickness of 25 +/-0.92 mm by fusion casting, wherein the content of each component of the used BFe10-1-1 material is adjusted as follows: 9.23wt% nickel, 0.583wt% manganese, 1.21wt% iron, 0.00486wt% lead, 0.00289wt% phosphorus, 0.00324wt% sulfur, 0.001wt% silicon, 0.0149wt% zinc, 0.00148wt% tin, and the balance copper; wherein the casting adopts semi-continuous casting;
secondly, milling the blank obtained in the first step, wherein the milling thickness is controlled to be 0.8 mm;
thirdly, planetary rolling is carried out on the blank obtained in the second step, and the blank is rolled to a tube blank with the tolerance of the outer diameter and the outer diameter being 49 +/-1.2 mm and the tolerance of the wall thickness and the wall thickness being 2.5 +/-0.1 mm;
fourthly, stretching the tube blank obtained in the third step for the first time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 42 +/-0.82 mm and the tolerance of the wall thickness and the wall thickness of 2.2 +/-0.06 mm;
fifthly, performing secondary drawing on the tube blank obtained in the step four to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 37 +/-0.70 mm and the tolerance of the wall thickness and the wall thickness of 1.9 +/-0.06 mm;
sixthly, stretching the tube blank obtained in the step five for the third time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 32 +/-0.64 mm and the tolerance of the wall thickness and the wall thickness of 1.7 +/-0.04 mm;
seventhly, performing middle cover furnace annealing on the tube blank obtained in the step six, wherein the annealing temperature is controlled at 730 ℃, and the annealing time is controlled at 50 min;
(eighth), performing primary coiling on the tube blank obtained in the step (seventh), and coiling to obtain a tube blank with the outer diameter of 26mm and the wall thickness of 1.6mm, wherein the coiling diameter is controlled to be 4 m;
performing secondary coiling on the tube blank obtained in the step (eight), and coiling to a tube blank with the outer diameter of 19mm and the wall thickness of 1.5mm, wherein the coiling diameter is controlled to be 4 m;
and (ten) annealing the tube blank obtained in the step (nine) in a middle cover furnace, wherein the annealing temperature is 700 ℃, and the annealing time is controlled to be 70 min.
Performing third coiling on the tube blank obtained in the step (ten), wherein the diameter of the coiled tube blank is controlled to be 4m, and the outer diameter of the coiled tube blank is 16.02-16.05 mm, the wall thickness of the coiled tube blank is 1.32-1.36 mm;
performing online annealing on the tube blank obtained in the step (eleven), controlling the annealing temperature at 750 ℃, the annealing time at 20S, and rolling the tube blank to a diameter of 4 m;
(thirteen), unreeling, straightening and cutting the tube blank obtained in the step (twelfth) to length;
step fourteen, rolling the tube blank obtained in the step thirteen into fins, wherein the height of the fins is 1.45mm, the thickness of the bottom wall of a processing section is 0.65mm, and the tooth density of the fins is 0.78 pcs/mm;
fifthly, cleaning, rinsing, blowing and drying the efficient pipe obtained in the step (fourteen);
sixthly, stress relief treatment is carried out on the efficient tube obtained in the step fifteen, the heat treatment temperature is controlled to be 720 ℃, and the heat preservation time is controlled to be 40 min;
seventhly, straightening, sizing, inspecting, packaging and warehousing.
The high-fin BFe10-1-1 cupronickel alloy high-efficiency tube produced by the embodiment is in a soft state, and the ratio of the fin height to the bottom wall thickness is 2.23; the surface has no crack, the yield is high and reaches 92 percent.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the principles of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (4)
1. A production method of a high-fin cupronickel alloy high-efficiency tube is characterized by comprising the following steps:
obtaining a blank which is made of BFe10-1-1, has an outer diameter and an outer diameter tolerance of 90 +/-2.50 mm and a wall thickness tolerance of 25 +/-1.50 mm by fusion casting, wherein the casting adopts semi-continuous casting;
secondly, milling the blank obtained in the step one, wherein the milling thickness is controlled to be 0.8-1.0 mm;
thirdly, planetary rolling is carried out on the blank obtained in the second step, and the blank is rolled to a tube blank with the tolerance of the outer diameter and the outer diameter being 49 +/-1.5 mm and the tolerance of the wall thickness and the wall thickness being 2.5 +/-0.3 mm;
fourthly, stretching the tube blank obtained in the third step for the first time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 42 +/-1.2 mm and the tolerance of the wall thickness and the wall thickness of 2.2 +/-0.07 mm;
fifthly, performing secondary drawing on the tube blank obtained in the step four to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 37 +/-1.1 mm and the tolerance of the wall thickness and the wall thickness of 1.9 +/-0.06 mm;
sixthly, stretching the tube blank obtained in the step five for the third time to obtain a tube blank with the tolerance of the outer diameter and the outer diameter of 32 +/-1 mm and the tolerance of the wall thickness and the wall thickness of 1.7 +/-0.05 mm;
seventhly, performing middle cover furnace annealing on the tube blank obtained in the step six, wherein the annealing temperature is controlled to be 700-730 ℃, and the annealing time is controlled to be 50-70 min;
(eighth), performing disc drawing on the tube blank obtained in the step (seventh), wherein the disc drawing is performed to the tube blank with the outer diameter of 15-25 mm and the wall thickness of 1.0-1.5 mm, and the disc winding diameter is controlled to be 4-5 m;
carrying out online annealing on the tube blank obtained in the step (eight), wherein the annealing temperature is controlled to be 720-750 ℃, the annealing time is controlled to be 20-30 s, and the winding diameter is controlled to be 4-5 m;
step ten, unwinding, straightening and cutting to length the pipe blank obtained in the step nine;
step eleven, rolling fins on the tube blank obtained in the step eleven, wherein the height of the fins is controlled to be 1.45-1.55 mm, the thickness of the bottom wall of a rolled fin machining section is controlled to be 0.6-0.65 mm, and the tooth density of the fins is controlled to be 0.68-0.78 pcs/mm;
step twelve, cleaning, rinsing, blowing and drying the high-efficiency pipe obtained in the step eleven;
(thirteen) stress relief heat treatment is carried out on the high-efficiency tube obtained in the step (twelfth), the heat treatment temperature is controlled to be 550-720 ℃, and the heat preservation time is controlled to be 40-60 min;
and (fourteen), straightening, sizing, inspecting, packaging and warehousing the high-efficiency tube obtained in the step (thirteen).
2. The production method of the high-efficiency high-fin cupronickel alloy tube as claimed in claim 1, wherein the production method comprises the following steps: adjusting the content of each component of the BFe10-1-1 material used in the step (one) as follows: 9.0 to 9.5 weight percent of nickel, 0.55 to 0.65 weight percent of manganese, 1.0 to 1.5 weight percent of iron, not more than 0.02 weight percent of lead, not more than 0.005 weight percent of phosphorus, not more than 0.008 weight percent of sulfur, not more than 0.05 weight percent of silicon, not more than 0.05 weight percent of zinc, not more than 0.005 weight percent of tin and the balance of copper.
3. The production method of the high-efficiency high-fin cupronickel alloy tube as claimed in claim 1, wherein the production method comprises the following steps: and (iv) when the total elongation coefficient of the coil drawing exceeds 2.0, adding one-time middle cover furnace annealing, controlling the annealing temperature at 700-730 ℃ and the annealing time at 50-70 min.
4. The production method of the high-efficiency high-fin cupronickel alloy tube as claimed in claim 1, wherein the production method comprises the following steps: and (eleventh) rolling the fins, increasing the tooth density and reducing the fin height on the premise of ensuring the fin height, the bottom wall thickness of the processing section and the heat exchange area, wherein the tooth density is increased by 0.01pcs/mm when the fin height is reduced by 0.01 mm.
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| CN202011094863.1A CN112296617B (en) | 2020-10-14 | 2020-10-14 | Production method of high-fin cupronickel alloy high-efficiency tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115505767A (en) * | 2022-09-27 | 2022-12-23 | 江苏隆达超合金股份有限公司 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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| CN115505767A (en) * | 2022-09-27 | 2022-12-23 | 江苏隆达超合金股份有限公司 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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| Publication number | Publication date |
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| CN112296617B (en) | 2022-09-06 |
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