CN105648274A - Nickel-copper alloy good in low-temperature impact performance and production technology of nickel-copper alloy - Google Patents
Nickel-copper alloy good in low-temperature impact performance and production technology of nickel-copper alloy Download PDFInfo
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- CN105648274A CN105648274A CN201610161875.9A CN201610161875A CN105648274A CN 105648274 A CN105648274 A CN 105648274A CN 201610161875 A CN201610161875 A CN 201610161875A CN 105648274 A CN105648274 A CN 105648274A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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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
- C22F1/10—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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Abstract
The invention relates to the technical field of alloy materials, particularly discloses a nickel-copper alloy good in low-temperature impact performance and meanwhile discloses a production technology of the nickel-copper alloy. The nickel-copper alloy comprises, by weight percentage, 28.5-32.5% of Cu, 2.74-3.2% of Al, 0.47-0.6% of Ti, 1.18-1.28% of Mn, 0.33-0.38% of Si, 0.057-0.085% of C, smaller than or equal to 0.002% of S and the balance Ni. The low-temperature impact work of the nickel-copper alloy is far higher than that of an existing nickel-copper alloy material, and it is shown by low-temperature using conditions in a practical using environment that the low-temperature impact resistance capability of the nickel-copper alloy is very high; meanwhile, the comprehensive mechanical performance of the nickel-copper alloy is very good and is far superior than that of the existing nickel-copper alloy material; and the service life of a low-temperature pump is greatly prolonged when an LNG low-temperature pump shaft made of the nickel-copper alloy replacing a nickel-copper alloy of the same kind is used.
Description
Technical field
The present invention relates to technical field of alloy material, particularly relate to the monel that a kind of low temperature impact properties is excellent, also relate to its production technology.
Background technology
Natural gas is increasingly favored as clean energy resource, and LNG (liquefied natural gas) is all classified as preferred fuels by a lot of countries. Natural gas ratio in energy supply increases sharply, and liquefied natural gas, just with the rapid growth of annual about 12%, becomes the whole world and increases one of the swiftest and the most violent energy industry. The whole world production of LNG and trade are increasingly active in recent years, and LNG has become rare cleaning resource, is becoming the focus that world's oil and gas industry is new. For ensureing energy supply diversification and improving energy consumption structure, some energy-consuming big countries increasingly pay attention to the introduction of LNG, and LNG receiving station is all built extensive in Japan, Korea S, the U.S., Europe. The profit growth point that it is new is also turned to LNG business by international major oil companies one after another, and LNG is by the popular energy commodity of next whole world contention after becoming oil.
At present, the transport of substantial amounts of LNG relies primarily on the means of transportation of steamer, needs after harbour, with special cryopump, it is transported to from cabin pipeline on the bank or holding vessel when LNG cargo ship arrives. So, effect of cryopump just becomes key one ring in LNG transportation. Generally, all there is brittle-ductile transition temperature in metal material major part, and this temperature is generally individually below 0 degree Celsius, and the mechanical property of the more low material of temperature is more poor. Therefore, for the shaft material of LNG special low temperature pump, its ultralow temperature mechanical property determines the serviceability of cryopump. The ultralow temperature mechanical property of cryopump shaft material is more excellent, and the serviceability of cryopump is more good.
The shaft material of current cryopump is generally adopted monel, and monel is single �� phase, and this alloy does not have brittle-ductile transition temperature, is especially suitable for and uses at low temperatures. But, the intensity of ambrose alloy bianry alloy is not high, it is difficult to meet the pump shaft requirement to mechanical property. For this, LNG low temperature pump shaft mechanical property requirements under cryogenic to be met, monel also needs to add the unit such as manganese, carbon, silicon, ferrum, aluminum and titanium and usually improves the mechanical property of ambrose alloy bianry alloys.But existing cryopump shaft material monel, owing to it is elementary composition not reasonable, adds the defect in production technology, and existing cryopump shaft material monel low temperature impact properties is not good, and toughness can not meet requirement.
Summary of the invention
It is an object of the present invention to provide the monel that a kind of low temperature impact properties is excellent, this monel is except having significantly high intensity and toughness, its low-temperature impact work can reach more than 150J (V-type mouth ,-196 DEG C), has very excellent low temperature impact properties.
The object of the invention also resides in the production technology of the monel providing a kind of low temperature impact properties excellent.
This invention address that technical problem adopts the following technical scheme that the monel that a kind of low temperature impact properties is excellent, the composition by weight percent of described monel is:
Cu:28.5%��32.5%;
Al:2.74%��3.2%;
Ti:0.47%��0.6%;
Mn:1.18%��1.28%;
Si:0.33%��0.38%;
C:0.057%��0.085%;
S��0.002%;
Surplus is Ni.
Optionally, the composition by weight percent of described monel is: Cu:30.5%, Al:2.88%, Ti:0.47%, Mn:1.18%, Si:0.35%, C:0.06%, S��0.002%; Surplus is Ni.
Optionally, the composition by weight percent of described monel is: Cu:32.5%, Al:3.2%, Ti:0.6%, Mn:1.28%, Si:0.38%, C:0.085%, S��0.002%; Surplus is Ni.
Optionally, the composition by weight percent of described monel is: Cu:28.5%, Al:2.74%, Ti:0.52%, Mn:1.18%, Si:0.33%, C:0.057%, S��0.002%; Surplus is Ni.
The production technology of the monel that a kind of low temperature impact properties is excellent, described production technology comprises the following steps:
Raw material in vacuum melting furnace at 1500��1650 DEG C melting produce liquation, fusion process adds a small amount of magnesium copper as degasifier, the percentage by weight of described raw material consists of: the Cu of 29%��33%, the electrolytic aluminium of 2.9%��3.5%, the pure titanium of 0.5%��0.7%, the electrolytic manganese of 1.2%��1.3%, the pure silicon of 0.35%��0.4%, the carbon dust of 0.07%��0.1%, the electrolytic nickel of surplus;
Liquation carries out refine 40��45 minutes at 1580��1600 DEG C;
Refine stands 30 minutes at 1530��1550 DEG C after terminating;
After being cooled to 1500��1520 DEG C, pour in pig mold, be cooled to room temperature, obtain ingot casting;
Described ingot casting is cut rising head and scale removal processes;
Then ingot casting being heated at 1150 DEG C, carry out forging and stamping processing afterwards, swaging deformation amount is more than 60%;
Gained forging is carried out heat treatment after terminating by forging and stamping, prepares monel finished product.
Preferably, described Technology for Heating Processing is: described forging heats to 400 DEG C from room temperature in heat-treatment furnace, heats up 1��2 hour consuming time, is incubated 1��2 hour at 400 DEG C, then described forging is from 400 DEG C of heating to 580��600 DEG C, heating up 1��2 hour consuming time, be incubated 16��20 hours at 580��600 DEG C, forging is down to 400 DEG C from 580��600 DEG C afterwards, lower the temperature 15��18 hours consuming time, subsequently heat-treated furnace power-off, furnace cooling, prepare monel finished product.
The composition by weight percent of described monel finished product is:
Cu:28.5%��32.5%;
Al:2.74%��3.2%;
Ti:0.47%��0.6%;
Mn:1.18%��1.28%;
Si:0.33%��0.38%;
C:0.057%��0.085%;
S��0.002%;
Surplus is Ni.
There is advantages that due to aluminum in the monel of the present invention, titanium, carbon content scientific and reasonable, the addition of aluminum and titanium can and nickel between form (Ti, Al)3The hardening constituent of Ni, precipitates out at grain boundaries, thus significantly improving the alloy strength of monel, carbon forms Carbide Precipitation at intergranular, enhances alloy strength; Take solid solution to add the heat treatment mode of timeliness so that in monel (Ti, Al) simultaneously3The disperse more of the quantity of Ni hardening constituent, structure are more tiny and distribution is more uniform, finally significantly increase the comprehensive mechanical property of monel. Monel prepared by the present invention has very excellent low temperature impact properties, at-196 DEG C, its V-type mouth ballistic work can reach about 170J, its room temperature tensile strength can reach 1100MP, yield strength can reach 870MPa, elongation percentage can reach 22%, hardness reaches 33HRC, and reduction of area is 57%, the dark blue group of its mechanical performance index Yuan Chao U.S. mechanical property requirements to reaching required by LNG pump shaft material and low temperature impact properties requirement. Compared with existing similar monel, its low-temperature impact work exceeds about 2��3 times than existing monel, and low temperature impact properties significantly improves. It addition, the toughness of this monel also exceeds much than existing monel.
Compared with existing similar monel, the monel of the present invention has property effect highlighted below: the low-temperature impact work of gained monel is significantly larger than existing nickel-copper alloy material, low temperature service condition in practical service environment shows, the low-temperature impact resistance ability of monel of the present invention is very strong; Its comprehensive mechanical property is very excellent simultaneously, remote excellent in existing nickel-copper alloy material. Cavitation corrosion in actual environment test result indicate that, the low-temperature impact resistance ability of monel of the present invention is relatively strong, replaces, with this monel, the LNG low temperature pump shaft that similar monel is made, and the service life of cryopump is greatly improved. Show that this monel can be promoted as a kind of LNG low temperature pump shaft alloy.
Accompanying drawing explanation
Fig. 1 is the fractograph of the monel finished product tissue that the embodiment of the present invention 1 prepares;
Fig. 2 is the fractograph of the monel finished product tissue that the embodiment of the present invention 2 prepares;
Fig. 3 is the fractograph of the monel finished product tissue that the embodiment of the present invention 3 prepares.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme is further elaborated.
Embodiment 1
Present embodiments providing a kind of monel, its composition by weight percent is: Cu:30.5%, Al:2.88%, Ti:0.47%, Mn:1.18%, Si:0.35%, C:0.06%, S:0.002%; Surplus is Ni.
The production technology of this monel, comprises the following steps:
Taking raw material, the percentage by weight of raw material consists of: the Cu of 31%, the electrolytic aluminium of 3%, the pure titanium of 0.5%, the electrolytic manganese of 1.2%, the pure silicon of 0.37%, the carbon dust of 0.07%, the electrolytic nickel of surplus; In raw material frequency smelting furnace in a vacuum, at 1550��1650 DEG C, melting produces liquation, adds a small amount of magnesium copper as degasifier in fusion process;
Liquation carries out refine 45 minutes at 1600 DEG C;
Refine stands 30 minutes at 1550 DEG C after terminating;
After being cooled to 1520 DEG C, pour in pig mold, be cooled to room temperature, obtain ingot casting;
Ingot casting is cut rising head and scale removal processes;
Then ingot casting being heated at 1150 DEG C, carry out forging and stamping processing afterwards, swaging deformation amount is more than 60%;
Forge and press the heat treatment that after terminating, gained forging is carried out in heat-treatment furnace following system: gained forging heats to 400 DEG C from room temperature in heat-treatment furnace, heat up 2 hours consuming time, being incubated 2 hours at 400 DEG C, then forging is from 400 DEG C of heating to 600 DEG C, heats up 2 hours consuming time, it is incubated 20 hours at 600 DEG C, forging is down to 400 DEG C from 600 DEG C afterwards, lowers the temperature 18 hours consuming time, subsequently heat-treated furnace power-off, furnace cooling, prepares monel finished product. The tissue fractograph of this monel finished product is as shown in Figure 1.
Embodiment 2
Present embodiments providing a kind of monel, its composition by weight percent is: Cu:32.5%, Al:3.2%, Ti:0.6%, Mn:1.28%, Si:0.38%, C:0.085%, S:0.001%; Surplus is Ni.
The production technology of this monel, comprises the following steps:
Taking raw material, the percentage by weight of raw material consists of: the Cu of 33%, the electrolytic aluminium of 3.5%, the pure titanium of 0.7%, the electrolytic manganese of 1.3%, the pure silicon of 0.4%, the carbon dust of 0.1%, the electrolytic nickel of surplus; In raw material frequency smelting furnace in a vacuum, at 1580��1650 DEG C, melting produces liquation, adds a small amount of magnesium copper as degasifier in fusion process;
Liquation carries out refine 45 minutes at 1600 DEG C;
Refine stands 30 minutes at 1550 DEG C after terminating;
After being cooled to 1520 DEG C, pour in pig mold, be cooled to room temperature, obtain ingot casting;
Ingot casting is cut rising head and scale removal processes;
Then ingot casting being heated at 1150 DEG C, carry out forging and stamping processing afterwards, swaging deformation amount is more than 60%;
Forge and press the heat treatment that after terminating, gained forging is carried out in heat-treatment furnace following system: gained forging heats to 400 DEG C from room temperature in heat-treatment furnace, heat up 2 hours consuming time, being incubated 1 hour at 400 DEG C, then forging is from 400 DEG C of heating to 580 DEG C, heats up 1 hour consuming time, it is incubated 16 hours at 580 DEG C, forging is down to 400 DEG C from 580 DEG C afterwards, lowers the temperature 15 hours consuming time, subsequently heat-treated furnace power-off, furnace cooling, prepares monel finished product. The tissue fractograph of this monel finished product is as shown in Figure 2.
Embodiment 3
Present embodiments providing a kind of monel, its composition by weight percent is: Cu:28.5%, Al:2.74%, Ti:0.52%, Mn:1.18%, Si:0.33%, C:0.057%, S:0.002%; Surplus is Ni.
The production technology of this monel, comprises the following steps:
Taking raw material, the percentage by weight of raw material consists of: the Cu of 29%, the electrolytic aluminium of 2.9%, the pure titanium of 0.6%, the electrolytic manganese of 1.2%, the pure silicon of 0.35%, the carbon dust of 0.07%, the electrolytic nickel of surplus; In raw material frequency smelting furnace in a vacuum, at 1500��1600 DEG C, melting produces liquation, adds a small amount of magnesium copper as degasifier in fusion process;
Liquation carries out refine 40 minutes at 1580 DEG C;
Refine stands 30 minutes at 1530 DEG C after terminating;
After being cooled to 1500 DEG C, pour in pig mold, be cooled to room temperature, obtain ingot casting;
Ingot casting is cut rising head and scale removal processes;
Then ingot casting being heated at 1150 DEG C, carry out forging and stamping processing afterwards, swaging deformation amount is more than 60%;
Forge and press the heat treatment that after terminating, gained forging is carried out in heat-treatment furnace following system: gained forging heats to 400 DEG C from room temperature in heat-treatment furnace, heat up 1 hour consuming time, being incubated 1 hour at 400 DEG C, then forging is from 400 DEG C of heating to 580 DEG C, heats up 1 hour consuming time, it is incubated 18 hours at 580 DEG C, forging is down to 400 DEG C from 580 DEG C afterwards, lowers the temperature 15 hours consuming time, subsequently heat-treated furnace power-off, furnace cooling, prepares monel finished product.The tissue fractograph of this monel finished product is as shown in Figure 3.
The sequencing of above example only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit; Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. the monel that a low temperature impact properties is excellent, it is characterised in that the composition by weight percent of described monel is:
Cu:28.5%��32.5%;
Al:2.74%��3.2%;
Ti:0.47%��0.6%;
Mn:1.18%��1.28%;
Si:0.33%��0.38%;
C:0.057%��0.085%;
S��0.002%;
Surplus is Ni.
2. monel according to claim 1, it is characterised in that the composition by weight percent of described monel is: Cu:30.5%, Al:2.88%, Ti:0.47%, Mn:1.18%, Si:0.35%, C:0.06%, S��0.002%; Surplus is Ni.
3. monel according to claim 1, it is characterised in that the composition by weight percent of described monel is: Cu:32.5%, Al:3.2%, Ti:0.6%, Mn:1.28%, Si:0.38%, C:0.085%, S��0.002%; Surplus is Ni.
4. monel according to claim 1, it is characterised in that the composition by weight percent of described monel is: Cu:28.5%, Al:2.74%, Ti:0.52%, Mn:1.18%, Si:0.33%, C:0.057%, S��0.002%; Surplus is Ni.
5. the production technology of the monel of a low temperature impact properties excellence, it is characterised in that described production technology comprises the following steps:
Raw material in vacuum melting furnace at 1500��1650 DEG C melting produce liquation, fusion process adds degasifier, the percentage by weight of described raw material consists of: the Cu of 29%��33%, the electrolytic aluminium of 2.9%��3.5%, the pure titanium of 0.5%��0.7%, the electrolytic manganese of 1.2%��1.3%, the pure silicon of 0.35%��0.4%, the carbon dust of 0.07%��0.1%, the electrolytic nickel of surplus;
Liquation carries out refine 40��45 minutes at 1580��1600 DEG C;
Refine stands 30 minutes at 1530��1550 DEG C after terminating;
After being cooled to 1500��1520 DEG C, pour in pig mold, be cooled to room temperature, obtain ingot casting;
Described ingot casting is cut rising head and scale removal processes;
Then ingot casting being heated at 1150 DEG C, carry out forging and stamping processing afterwards, swaging deformation amount is more than 60%;
Gained forging is carried out heat treatment after terminating by forging and stamping, prepares monel finished product.
6. the production technology of monel according to claim 5, it is characterized in that, described Technology for Heating Processing is: described forging heats to 400 DEG C from room temperature in heat-treatment furnace, heat up 1��2 hour consuming time, it is incubated 1��2 hour at 400 DEG C, then described forging is from 400 DEG C of heating to 580��600 DEG C, heat up 1��2 hour consuming time, it is incubated 16��20 hours at 580��600 DEG C, forging is down to 400 DEG C from 580��600 DEG C afterwards, lowers the temperature 15��18 hours consuming time, subsequently heat-treated furnace power-off, furnace cooling, prepares monel finished product.
7. the production technology of the monel according to claim 5 or 6, it is characterised in that the composition by weight percent of described monel finished product is:
Cu:28.5%��32.5%;
Al:2.74%��3.2%;
Ti:0.47%��0.6%;
Mn:1.18%��1.28%;
Si:0.33%��0.38%;
C:0.057%��0.085%;
S��0.002%;
Surplus is Ni.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306080A (en) * | 2019-08-06 | 2019-10-08 | 北方工业大学 | A kind of new type corrosion resistant nickel-base alloy and its production technology |
| CN111961919A (en) * | 2020-08-04 | 2020-11-20 | 钢铁研究总院 | Nickel-copper alloy bar for ship and processing method thereof |
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| CN1405343A (en) * | 2001-08-09 | 2003-03-26 | 上海金韦仑特种材料研究所 | High-strength nickel-copper alloy and production method thereof |
| CN103773996A (en) * | 2012-10-23 | 2014-05-07 | 丹阳市利普机械配件有限公司 | Manufacturing process for nickel-copper alloy used for cable |
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2016
- 2016-03-21 CN CN201610161875.9A patent/CN105648274B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1405343A (en) * | 2001-08-09 | 2003-03-26 | 上海金韦仑特种材料研究所 | High-strength nickel-copper alloy and production method thereof |
| CN103773996A (en) * | 2012-10-23 | 2014-05-07 | 丹阳市利普机械配件有限公司 | Manufacturing process for nickel-copper alloy used for cable |
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| 王国璋: "《压力容器焊接实用手册》", 30 June 2013 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306080A (en) * | 2019-08-06 | 2019-10-08 | 北方工业大学 | A kind of new type corrosion resistant nickel-base alloy and its production technology |
| CN111961919A (en) * | 2020-08-04 | 2020-11-20 | 钢铁研究总院 | Nickel-copper alloy bar for ship and processing method thereof |
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