CN103789570A - High-strength heat-resisting micro-alloyed copper pipe and preparation method thereof - Google Patents
High-strength heat-resisting micro-alloyed copper pipe and preparation method thereof Download PDFInfo
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- CN103789570A CN103789570A CN201210422137.7A CN201210422137A CN103789570A CN 103789570 A CN103789570 A CN 103789570A CN 201210422137 A CN201210422137 A CN 201210422137A CN 103789570 A CN103789570 A CN 103789570A
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Abstract
The invention relates to a high-strength heat-resisting micro-alloyed copper pipe and a preparation method thereof. The micro-alloyed copper pipe and the preparation method thereof are characterized in that the copper pipe comprises 0.05-0.25 wt% of Sn, 0.02-0.2 wt% of Zn, 0.02-0.2 wt% of Ni, 0.02-0.1 wt% of P and 0.1-0.4 wt% of Co, with the balance being copper and unavoidable impurities; and the copper pipe is prepared by steps of weighing electrolytic copper, electrolytic nickel, electrolytic cobalt, a phosphor copper alloy, zinc ingots and tin ingots according to the component ratio, and sequentially adding the above materials into an electric induction furnace, melting at 1150-1250 DEG C, maintaining the temperature for 5-30 min when all the metal are melt, casting a copper alloy ingot at 1100-1200 DEG C, heating the copper alloy ingot to 850-900 DEG C and extruding, and subjecting the extruded blank to steps of cold-rolling, scalping, stretching, annealing at 500-600 DEG C, coiling and pulling, annealing, sizing and examining to obtain a finished product. Accordingly, the high strength and high heat resistance of the material are achieved and the cooper pipe is an ideal copper pipe material used for heat exchangers.
Description
Technical field
The present invention relates to a kind of high-strength temperature-resistant microalloying copper pipe and preparation method thereof, particularly a kind of high-strength temperature-resistant microalloying copper pipe for heat exchanger and preparation method thereof.
Background technology
Copper alloy has the good characteristic such as thermal conduction, solidity to corrosion, is widely used in heat exchanger field.At present, the material that heat exchanger is conventional is phosphorous deoxidize copper tube (TP2), and its intensity is lower and thermotolerance is also general.Carrying out in heat exchanger assembling process, parts need carry out the Welding of 800 ℃ of left and right, phosphorized copper is in the time carrying out soldering, weld tissue there will be coarse grains, there is softening, strength decreased in material, there is the defects such as anti-pressure ability deficiency, need to increase tube wall thickness if improve this type of defect, cause cost to rise.
For solving the above-mentioned defect of phosphorized copper existence and adapting to the requirement high-strength, heat-resisting, heat conductance is good, a kind of copper alloy tube for heat exchanger that patent 201110174411.9 proposes, its composition: Sn0.5-1.0wt%, P0.05-0.1wt%, Al2.2-8.5wt%, Mn0.5-1.8wt%, Fe0.15-0.35wt%, surplus is that copper and inevitable impurity form, although this alloy has good intensity and thermotolerance, plasticity is lower, and the interpolation of Al, have a strong impact on the heat conductivility of material, thereby do not reach ideal effect.
Along with developing rapidly of overcritical heat exchanger, its heat-resisting, anti-corrosion, intensity to material has had higher requirement.Along with the prices of raw and semifnished materials go up, material thin wall (lightweight) and high performance, just to reduce production costs, to improve the quality of products as target, are puted forth effort to seek to realize by each enterprise simultaneously.Therefore, research and development preparations has high anti-corrosion, high heat-resisting and high-strength hot exchange microalloy copper pipe will become following development trend, to expand the Application Areas of Cu alloy material in heat exchanger.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of high-strength temperature-resistant microalloying copper pipe for heat exchanger.
First technical problem to be solved by this invention is to provide a kind of preparation method of the high-strength temperature-resistant microalloying copper pipe for heat exchanger.
The present invention solves the technical scheme that above-mentioned first technical problem adopts: a kind of high-strength temperature-resistant microalloying copper pipe, it is characterized in that its component proportion is: Sn 0.05-0.25wt%, Zn 0.02-0.2wt%, Ni 0.02-0.2wt%, P0.02-0.1wt%, Co 0.1-0.4wt%, surplus is copper and inevitable impurity.
The present invention solves the technical scheme that above-mentioned second technical problem adopt: a kind of preparation method of high-strength temperature-resistant microalloying copper pipe, after it is characterized in that first electrolytic copper, electrolytic nickel, electrolytic cobalt, phosphor copper, zinc ingot metal, tin slab being weighed according to the component proportion of copper pipe, add successively melting in induction furnace, employing charcoal covers, smelting temperature is 1150 ~ 1250 ℃, after whole melting of metal, insulation 5-30 minute; Carry out the casting of copper alloy ingot, 1100 ~ 1200 ℃ of pouring temperatures; Then copper alloy casting ingot is heated to 850-900 ℃ and pushes, extrusion billet is through cold rolling, the stretching that strips off the skin, and 500-600 ℃ of annealing, dish draw, annealing, scale, check become finished product.
As improvement, the component proportion of described copper pipe is: Sn 0.05-0.25wt%, and Zn 0.02-0.2wt%, Ni0.02-0.2wt%, P 0.02-0.1wt%, Co 0.1-0.4wt%, surplus is copper and inevitable impurity.
Improve, in described phosphor copper, the mass percent of phosphorus is 14 ~ 14.5wt% again.
Finally, described ingot casting adds hot extrusion and adopts water seal extruding, to prevent extrusion billet surface oxidation, plays the effect of solution treatment.
Compared with prior art, the invention has the advantages that: the intensity that improves material by solution strengthening such as Sn, Ni, Zn, improve the weldability energy of material by P, by Co, P crystal grain thinning, improve recrystallization temperature, thereby realize high-strength, the high heat resistance of material.Microalloying copper pipe of the present invention is a kind of copper pipe material of desirable high-strength, heat-proof corrosion-resistant, can manufacture field for heat exchanger.
figure of description
Fig. 1 is the influence curve figure of annealing temperature to tensile strength in the embodiment of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
A kind of preparation method of high-strength temperature-resistant microalloying copper pipe, first electrolytic copper, electrolytic nickel, electrolytic cobalt, phosphor copper, zinc ingot metal, tin slab are carried out to batch weighing according to following component proportion: Sn 0.05-0.25wt%, Zn 0.02-0.2wt%, Ni0.02-0.2wt%, P 0.02-0.1wt%, Co 0.1-0.4wt%, surplus is copper and inevitable impurity; Then material is added to melting in induction furnace successively, adopt charcoal to cover, smelting temperature is 1150 ~ 1250 ℃, after whole melting of metal, and insulation 5-30 minute; Carry out the casting of copper alloy ingot, 1100 ~ 1200 ℃ of pouring temperatures; Then copper alloy casting ingot is heated to 850-900 ℃ and pushes, extrusion billet is through cold rolling, the stretching that strips off the skin, and 500-600 ℃ of annealing (timeliness), dish draw, 500-600 ℃ annealing, scale, check become finished product.
The content range of the each component of copper pipe is to determine according to following reason:
Copper:
Copper content >=the 99.3wt% of microalloying copper pipe of the present invention.Copper content is during lower than 99.3wt%, and material plasticity is poor, and tubing processing need be carried out process annealing processing, and cost raises; While easily occurs that in the time preparing heat exchanger product cracking etc. manifests and causes into material reduction, and production cost increases.
Sn、Ni、Zn：
Sn, Ni, Zn, in the scope of the present invention's design, are present in matrix with the form of solid solution, improve the strength of materials.In the time that its content is too low, its strengthening effect not obvious, and when too high levels, will seriously reduce material plasticity.
P：
Phosphorus can play deoxidation and improve fluidity of molten effect, and phosphorus can improve the welding property of material simultaneously.When phosphorus content increases, will, in material grain boundaries segregation, seriously reduce material plasticity.
Co：
Cobalt can crystal grain thinning, improves recrystallization temperature.Meanwhile, Co and P Precipitation Co2P hard particles, can reduce P in grain boundaries segregation adverse effect, meanwhile, can form dislocation at grain boundaries and surely prick, and improves intensity, and suppress recrystallize, thereby improve material thermal resistance energy and intensity.
Concrete data below by embodiment 1,2,3 make a more detailed description invention.
Induction furnace in embodiment 1,2,3 adopts the melting of 300Kg medium-frequency induction furnace, smelting temperature 1150-1250 ℃, and teeming temperature 1100-1200 ℃, adopts vertical D.C.casting, and diameter is Φ 195mm.
Alloy main component is as shown in table 1.
Table 1 alloy main component table (wt%)
| Sample number into spectrum | Cu | Sn | P | Ni | Co | Zn |
| TP2 | >99.9 | - | 0.02 | - | - | - |
| Embodiment 1 | >99.7 | 0.08 | 0.02 | 0.05 | 0.1 | 0.03 |
| Embodiment 2 | >99.3 | 0.15 | 0.08 | 0.1 | 0.25 | 0.1 |
| Embodiment 3 | >99.6 | 0.1 | 0.04 | 0.02 | 0.15 | 0.02 |
Wherein the main flow process of production technique of extruding-cold rolling-drawing-timeliness-drawing-annealing is as shown in table 2.
The working modulus of the different operations of rolling of table 2
| Operation | Step | Specification | Parameter |
| 1 | Extruding | 50×3 | Extrusion temperature: 850-900 ℃ |
| 2 | Cold rolling | 20×2 | Multi-pass rolling |
| 3 | Stretching strips off the skin | 15×1.5 | Multi-pass extends |
| 4 | Annealing (timeliness) | 15×1.5 | Temperature: 550 ℃; Time: 2h |
| 5 | Dish draws | 10×1 | Multi-pass extends |
| 7 | Annealing | 10×1 | Temperature: 500 ℃; Time: 1h |
According to the composition in embodiment and complete processing, the performance of prepared material is as shown in table 3 respectively.
Table 3 embodiment and the TP2 soft state mechanical property of annealing
As seen from Table 3, compared with microalloy copper pipe of the present invention is open to the custom with TP2, the performances such as its tensile strength, yield strength, resistance to compression all have larger lifting, as can be seen from Figure 1 simultaneously, material of the present invention still has higher intensity in the time of 900K temperature, high-strength, heat-resisting microalloying copper pipe for a kind of desirable heat exchanger thus can be by microalloy copper pipe of the present invention time
Above embodiment is to the further illustrating and explaining of this patent, rather than limitation of the present invention, and in spirit of the present invention and right protection scope, any modification of making, all falls into protection scope of the present invention.
Claims (4)
1. a high-strength temperature-resistant microalloying copper pipe, is characterized in that its component proportion is: Sn 0.05-0.25wt%, and Zn0.02-0.2wt%, Ni 0.02-0.2wt%, P 0.02-0.1wt%, Co 0.1-0.4wt%, surplus is copper and inevitable impurity.
2. the preparation method of a right 1 high-strength temperature-resistant microalloying copper pipe, after it is characterized in that first electrolytic copper, electrolytic nickel, electrolytic cobalt, phosphor copper, zinc ingot metal, tin slab being weighed according to the component proportion of copper pipe, add successively melting in induction furnace, employing charcoal covers, smelting temperature is 1150 ~ 1250 ℃, after whole melting of metal, insulation 5-30 minute; Carry out the casting of copper alloy ingot, 1100 ~ 1200 ℃ of pouring temperatures; Then copper alloy casting ingot is heated to 850-900 ℃ and pushes, extrusion billet is through cold rolling, the stretching that strips off the skin, and 500-600 ℃ of annealing (timeliness), dish draw, 500-600 ℃ annealing, scale, check become finished product.
3. preparation method according to claim 2, the mass percent that it is characterized in that phosphorus in described phosphor copper is 14 ~ 14.5wt%.
4. preparation method according to claim 2, is characterized in that described ingot casting adds hot extrusion and adopts water seal extruding.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108699676A (en) * | 2016-04-12 | 2018-10-23 | 三菱综合材料株式会社 | The manufacturing method of copper alloy bushing pipe and copper alloy bushing pipe |
| CN110038920A (en) * | 2019-05-24 | 2019-07-23 | 佛山市南海汇丰铜业制品有限公司 | Realize copper pipe quantity-produced method and apparatus |
| CN110964942A (en) * | 2019-12-19 | 2020-04-07 | 无锡隆达金属材料有限公司 | Preparation process of high-strength wear-resistant copper alloy pipe |
| CN110964943A (en) * | 2019-12-19 | 2020-04-07 | 无锡隆达金属材料有限公司 | Method for producing high-strength copper alloy by adopting semi-continuous casting |
| 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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| CN108699676A (en) * | 2016-04-12 | 2018-10-23 | 三菱综合材料株式会社 | The manufacturing method of copper alloy bushing pipe and copper alloy bushing pipe |
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| CN110964942A (en) * | 2019-12-19 | 2020-04-07 | 无锡隆达金属材料有限公司 | Preparation process of high-strength wear-resistant copper alloy pipe |
| CN110964943A (en) * | 2019-12-19 | 2020-04-07 | 无锡隆达金属材料有限公司 | Method for producing high-strength copper alloy by adopting semi-continuous casting |
| CN110964942B (en) * | 2019-12-19 | 2021-07-30 | 江苏隆达超合金股份有限公司 | Preparation process of high-strength wear-resistant copper alloy pipe |
| 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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