CN102560165B - Method for smelting K417G alloy by using K417 alloy returns - Google Patents
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Abstract
The invention relates to a method for smelting K417G alloy by using K417 alloy returns. The method comprises the following steps of: carrying out sand blowing cleaning on the surface of the K417 alloy returns, and smelting the K417 alloy returns by adopting a vacuum induction furnace to form primary returns ingot; smelting intermediate alloy which comprises the following chemical components in percentage by weight (wt%): 0.07-0.08 of C, 4.92-5.30 of Al, 4.83-4.96 of Co, 8.72-9.26 of Cr, 2.76-3.1 of Mo, 0.064-0.073 of Zr, 0.014-0.02 of B, 4.41-4.46 of Ti, 0.65-0.75 of V, and the rest of Ni, taking corresponding proportions of the components, putting the components into the vacuum induction furnace and smelting the components to intermediate alloy ingot; and respectively taking and mixing the primary returns ingot of the k417 alloy returns and the intermediate alloy ingot in equal weight proportions, putting the mixture into the vacuum induction furnace for smelting, and finally smelting to form the K417G alloy. The method has the advantages of reducing the production cost and turning waste into wealth.
Description
Technical field
The present invention relates to the superalloy field, a kind of method with K417 revert melting K417G alloy is provided especially.
Background technology
The K417G alloy is on the basis of K417 alloy, reduces the nickel-base cast superalloy that 5%Co and 0.3%Ti develop.It not only has, and the K417 alloy density is little, plasticity good, the medium temperature intensity advantages of higher, and the low price good stability, does not separate out the б phase after 850 ℃ of long timeliness.This alloy has good castability, the hollow blade of castable forming shape complexity.Be fit to be applied to gas-turbine blade, turning vane and other high temperature part of working under 950 ℃ of conditions.
And the Ni that contains in the K417 alloy, Cr, Mo, Co etc. belong to the rare expensive element of country, are therefore guaranteeing to use returns to become very necessary under functional quality and the safe and reliable prerequisite.Aviation class foundry enterprise has adopted revert alloy to carry out the production of foundry goods in the casting production process of the nickel base superalloys such as K424, K403, K417, and is widely used.
And the K417 alloy widely applied with certain old type tube engine in because the update of engine, the returns such as a large amount of waste castings of productional surplus and running and feeding system are badly in need of being applied.The K417 alloy is identical with the K417G alloying element, and only component content is different, and can therefore adopt the K417 revert to produce the K417G alloy have become problem anxious to be resolved in the production process.
Summary of the invention
The object of the present invention is to provide a kind of method with alloy K417 returns melting K417G alloy, the K417 revert can't continue to use the waste problem that causes to solve in the past.
The invention provides a kind of method with K417 revert melting K417G alloy, the method adopts the K417 returns to be smelted into first alloy pig, adopt simultaneously metallic element to melt out a kind of master alloy, then K417 returns ingot and master alloy are smelted into the K417G alloy jointly, it is characterized in that: the composition reduction by 5% of Co in the K417 revert alloy, the composition of Ti are reduced by 0.3%, concrete melting step is as follows
---melting K417 alloy: after the surface of K417 revert carried out blast cleaning, adopt vacuum induction melting to become returns one defective material ingot;
---the melting master alloy: (wt%) is as follows for the food ingredient of this master alloy, C0.07～0.08, Al4.92～5.30, Co4.83～4.96, Cr8.72～9.26, Mo2.76～3.1, Zr0.064～0.073, B0.014～0.02, Ti4.41～4.46, V0.65～0.75, Ni surplus; The above element of getting corresponding proportion is put into vacuum induction furnace and is smelted into intermediate alloy ingot; Wherein, the food ingredient of master alloy can contain Fe, P, Si, Mn, S element, and requires S＜0.01, P＜0.015, Si＜0.2, Mn＜0.2, Fe＜1.0;
---melting K417G alloy: get respectively each reciprocity weight part of above-mentioned K417 revert one defective material ingot+intermediate alloy ingot and mix, add adjusting component behind the chemical analysis and add element, reach and put into vacuum induction furnace behind the K417G alloy and carry out melting, finally be smelted into the K417G alloy.
Wherein, the melting specific embodiment of described master alloy is as follows,
---change the clear stage: behind the master alloy ingredient composition, the whole Cr+ residue of the whole Mo+ of the whole Co+ of about 2/3Ni+1/6C+ that pack into successively from bottom to up 1/3Ni, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, begin vacuum oven is heated, continue simultaneously vacuum oven is vacuumized molten steel temperature＜1530 ℃, vacuum tightness≤10.66Pa;
---refining stage: require the vacuum tightness≤1.33Pa of vacuum oven, when molten steel temperature is 1530 ℃ ± 10 ℃, fall power to 80kW, add 1/6C again, the concise time is 20min～30min, stopped heating, freezing treatment 20min～30min;
---alloying 1: vacuum oven is continued heating, vacuum degree control is at≤0.67Pa, high-power rush film after, slowly add alloy element: when temperature is 1420 ℃～1450 ℃, reduce power to 80kW, at first add 2/3C, behind the C fine melt, add successively V-Al, Al, Ti, the whole Al 2min～5min consuming time that adds, again induction furnace being heated to power 130kW stirs, and the crucible 2～3 times of fascinating, when temperature reaches 1550 ℃～1570 ℃, stopped heating 7min～8min;
---alloying 2: after adding CrB and Zr element in the vacuum oven, continue heating, when temperature reaches 1530 ℃～1560 ℃, stopped heating, freezing treatment 30min～35min;
---the cast stage: send electric 180kW, vacuum oven is continued heating rush film, pour into a mould when molten steel temperature is 1450 ℃ ± 10 ℃, cast after vacuum oven in cool off 10min～20min final melting and obtain master alloy at 1min～2min the duration of pouring.
Wherein, in the melting specific embodiment of master alloy, according to the fusing point difference just of each element of alloy, master alloy has stipulated to add the order of element, in addition, adopts substep to add the method for C, prevents that C and CrB alloy from forming carbide, affects the quality of alloy.Be refined to 10min and add C, and the crucible 2～3 times of slowly fascinating, borrow the further C deoxidation of high temperature high vacuum condition to degas, remove the detrimental impurity element and realize the alloy homogenizing.Add Al process 2min～5min consuming time during the alloying, it is excessive to forbid once to add alloy, causes the too high generation splash of molten pool metal liquid local temperature and melting loss.Add CrB and Zr and added by feed compartment, send 140kW power to stir, the crucible 2～3 times of fascinating guarantees that alloying constituent is even.
The melting specific embodiment of described K417G alloy is as follows,
---change the clear stage: with K417 revert ingot+master alloy material ingot+add crucible that element is put into vacuum oven, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, vacuum oven is heated, continue to vacuumize, require molten steel temperature＜1530 ℃, vacuum tightness≤10.66Pa;
---refining stage: require the vacuum tightness≤1.33Pa of vacuum oven, when temperature is 1530 ℃ ± 10 ℃, send power 80kW to enter refining, add whole C refining period, carry out refining 20min～30min after, stopped heating, freezing treatment 25min～30min;
---the cast stage: the molten steel temperature in vacuum oven is 1450 ℃ ± 10 ℃ to be poured into a mould, and is controlled at 1min～2min the duration of pouring, cools off the final melting of 10min～20min after the cast in vacuum oven and gets the K417G alloy.
Wherein, compare with K417 alloy melting process in the melting specific embodiment of K417G alloy, concise temperature is brought up to 80kW by 70kW, has guaranteed so the concise temperature of concise phase, is conducive to alloy and fully gets rid of obnoxious flavour; Rush film temperature and bring up to 180kW by 120kW, improved the speed of rushing film, guaranteed class's product time; Cast power is changed into the trend that is slowly reduced by 120kW by 80kW, has guaranteed the flowability of alloy in casting process, and cast can be carried out smoothly, has guaranteed the lumber recovery of alloy.
Method with K417 revert melting K417G alloy provided by the invention, its advantage is: be conducive to the recycle of K417 revert, and environment protection is played a positive role, reduce production cost, turn waste into wealth.
Description of drawings
Fig. 1 is K417 revert synthetic material ingot technique electrical force profiles figure;
Fig. 2 is the technique electrical force profiles figure of master alloy melting;
Fig. 3 is K417G revert synthetic material ingot technique electrical force profiles figure.
Embodiment
Further explain the present invention below in conjunction with specific embodiment, but it does not limit the present invention.
Embodiment 1
At first, melting K417 revert: after the surface of K417 revert carried out blast cleaning, adopt vacuum induction melting to become returns one defective material ingot, concrete melting technology is seen accompanying drawing 1, and composition sees Table 1;
Secondly, melting master alloy: the whole Cr+ residue of the whole Mo+ of the whole Co+ of about 2/3Ni+1/6C+ that pack into successively from bottom to up 1/3Ni, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, begin vacuum oven is heated, continue simultaneously vacuum oven is vacuumized, require temperature＜1530 ℃, with alloyization clearly, change and continue the vacuum oven heating is required the vacuum tightness≤1.33Pa of vacuum oven after clear during vacuum tightness≤10.66Pa, when temperature is 1530 ℃ ± 10 ℃, fall power to 80kW, carry out refining, refining is to 10min, add 1/6C, the concise time is 20min～30min, stopped heating, freezing treatment 20min～30min; Again vacuum oven is continued heating, vacuum degree control is at≤0.67Pa, high-power rush film after, slowly add alloy element, when temperature is 1420 ℃～1450 ℃, reduce power to 80kW, at first add 2/3C, behind the C fine melt, add successively V-Al, Al, Ti, the whole Al 2min～5min consuming time that adds is heated to power 130kW to induction furnace again and stirs, and the crucible 2～3 times of fascinating, when temperature reaches 1550 ℃～1570 ℃, stopped heating 7min～8min; Send power 80kW, behind feed compartment adding CrB and Zr element, continue heating, when temperature reached 1530 ℃～1560 ℃, stopped heating was behind freezing treatment 30min～35min; Vacuum oven is continued heating rush film, pour into a mould when temperature is 1450 ℃ ± 10 ℃, the duration of pouring is at 1min～2min, in vacuum oven, cool off 10min～20min after the cast, final melting gets master alloy, and concrete melting technology is seen accompanying drawing 2, and concrete composition sees Table 1;
At last, melting K417G alloy: get respectively above-mentioned K417 revert one defective material ingot and intermediate alloy ingot equity weight part, through adjusting component, put into vacuum induction furnace and carry out melting, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, vacuum oven is heated, continue to vacuumize, require temperature＜1530 ℃, under the condition of vacuum tightness≤10.66Pa, change clearly after, continuation is heated vacuum oven, require the vacuum tightness≤1.33Pa of vacuum oven, when temperature is 1530 ℃ ± 10 ℃, carry out refining 20min～30min after, stopped heating, behind freezing treatment 25min～30min, vacuum oven is continued heating, rush film when requiring temperature to be 1420 ℃～1430 ℃, pour into a mould when the temperature of vacuum molten steel in the stove is 1450 ℃ ± 10 ℃, final melting gets the K417G alloy.Concrete melting technology is seen accompanying drawing 3, finally is smelted into the K417G alloy A.
Table 1:
The K417G alloy A that is smelted into is carried out high temperature endurance performance and high-temperature instantaneous performance test, and its result sees Table respectively 2, table 3.
Table 2: high temperature endurance performance
Table 3: high-temperature instantaneous performance
Embodiment 2
Melting K417G alloy B, concrete fusion process is identical with fusion process among the embodiment 1, and wherein the concrete composition of each alloy sees Table 4:
Table 4
The K417G alloy B that is smelted into is carried out high temperature endurance performance and high-temperature instantaneous performance test, and its result sees Table respectively 5, table 6,
Table 5: high temperature endurance performance
Table 6: high-temperature instantaneous performance
| Test temperature (℃) | Soaking time (min) | Breakdown point (MPa) | Relative elongation δ 5% | Relative reduction in area ψ % |
| 900 | 20 | 750 | 11.0 | 11.5 |
Embodiment 3
Melting K417G alloy C, concrete fusion process is identical with fusion process among the embodiment 1, and wherein the concrete composition of each alloy is seen table 7:
Table 7:
The K417G alloy C that is smelted into is carried out high temperature endurance performance and high-temperature instantaneous performance test, and its result sees Table respectively 8, table 9.
Table 8: high temperature endurance performance
| The size of sample (φ mm) | Proof stress (MPa) | Test temperature (℃) | Test period (h:min) | Unit elongation |
| φ5.00 | 235 | 950 | 95:11 is disconnected | No requirement (NR) |
| φ5.00 | 315 | 900 | 70:15 is disconnected | No requirement (NR) |
| φ5.00 | 647 | 760 | 50:01 is disconnected | 4.8 |
Table 9: high-temperature instantaneous performance
Embodiment 4
The concrete fusion process of melting K417G alloy D is identical with fusion process among the embodiment 1, and the K417 returns are two kinds of slightly discrepant K417 returns 1 of composition and K417 returns 2 in the raw material, and wherein the concrete composition of each alloy is seen table 10:
Table 10:
The K417G alloy D that is smelted into is carried out warm enduring quality and high-temperature instantaneous performance test, and its result sees Table respectively 11, table 12:
Table 11: high temperature endurance performance
Table 12: high-temperature instantaneous performance
| Test temperature (℃) | Soaking time (min) | Breakdown point (MPa) | Relative elongation δ 5% | Relative reduction in area ψ % |
| 900 | 20 | 730 | 8 | 19.5 |
Embodiment 5
The concrete fusion process of melting K417G alloy E is identical with fusion process among the embodiment 1, and the K417 returns are two kinds of slightly discrepant K417 returns 3 of composition and K417 returns 4 in the raw material, and wherein the concrete composition of each alloy is seen table 13:
Table 13:
The K417G alloy D that is smelted into is carried out warm enduring quality and high-temperature instantaneous performance test, and it the results are shown in, and sees Table respectively 14, table 15:
Table 14: high temperature endurance performance
| The size of sample (φ mm) | Proof stress (MPa) | Test temperature (℃) | Test period (h:min) | The unit elongation technical qualification |
| φ5.00 | 235 | 950 | 60:30 is not disconnected | No requirement (NR) |
| φ5.00 | 315 | 900 | 90:30 is not disconnected | No requirement (NR) |
| φ5.00 | 647 | 760 | 100:01 is disconnected | 6.8 |
Table 15: high-temperature instantaneous performance
| Test temperature (℃) | Soaking time (min) | Breakdown point (MPa) | Relative elongation δ 5% | Relative reduction in area ψ % |
| 900 | 20 | 695 | 8.5 | 12 |
And as follows for the performance index of K417G alloy:
High temperature endurance performance
| The size of sample (φ mm) | Proof stress (MPa) | Test temperature (℃) | Test period (h:min) | The unit elongation technical qualification |
| φ5.00 | 235 | 950 | ≥40 | No requirement (NR) |
| φ5.00 | 315 | 900 | ≥70 | No requirement (NR) |
| φ5.00 | 647 | 760 | ≥23 | ≥2 |
The high-temperature instantaneous performance
| Test temperature (℃) | Soaking time (min) | Breakdown point (MPa) | Relative elongation δ 5% | Relative reduction in area ψ % |
| 900 | 20 | ≥637 | ≥6.0 | ≥8.0 |
This shows that the K417G alloy property of embodiment 1～5 melting has all reached index request.
Claims (2)
1. method with K417 revert melting K417G alloy is characterized in that: with the composition of Co in the K417 revert alloy reduce by 5%, the composition of Ti reduces by 0.3%, concrete melting step is as follows,
---melting K417 alloy: after the surface of K417 revert carried out blast cleaning, adopt vacuum induction melting to become returns one defective material ingot;
---the melting master alloy: this master alloy food ingredient (wt%) is as follows, C0.07～0.08, Al4.92～5.30, Co4.83～4.96, Cr8.72～9.26, Mo2.76～3.1, Zr0.064～0.073, B0.014～0.02, Ti4.41～4.46, V0.65～0.75, Ni surplus; The above element of getting corresponding proportion is put into vacuum induction furnace and is smelted into intermediate alloy ingot;
---melting K417G alloy: get respectively the part by weight such as above-mentioned K417 revert one defective material ingot and intermediate alloy ingot and mix, add adjusting component behind the chemical analysis and add element, after reaching K417G alloy standard, put into vacuum induction furnace and carry out melting, finally be smelted into the K417G alloy;
The melting specific embodiment of described master alloy is as follows,
---change the clear stage: behind the master alloy ingredient composition, the whole Cr+ residue of the whole Mo+ of the whole Co+ of 2/3Ni+1/6C+ that pack into successively from bottom to up 1/3Ni, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, begin vacuum oven is heated, continue simultaneously vacuum oven is vacuumized molten steel temperature＜1530 ℃, vacuum tightness≤10.66Pa;
---refining stage: require the vacuum tightness≤1.33Pa of vacuum oven, when molten steel temperature is 1530 ℃ ± 10 ℃, fall power to 80kW, add 1/6C again, the concise time is 20min～30min, stopped heating, freezing treatment 20min～30min;
---alloying 1: vacuum oven is continued heating, and vacuum degree control is at≤0.67Pa, high-power rush film after, slowly add alloy element, when temperature is 1420 ℃～1450 ℃, reduce power to 80kW, at first add 2/3C, behind the C fine melt, add successively V-Al, Al, Ti, the whole Al 2min～5min consuming time that adds is heated to power 130kW to induction furnace again and stirs, and the crucible 2～3 times of fascinating, when temperature reaches 1550 ℃～1570 ℃, stopped heating 7min～8min;
---alloying 2: after adding CrB and Zr element in the vacuum oven, continue heating, when temperature reaches 1530 ℃～1560 ℃, stopped heating, freezing treatment 30min～35min;
---the cast stage: send electric 180kW, vacuum oven is continued heating rush film, pour into a mould when molten steel temperature is 1450 ℃ ± 10 ℃, cast after vacuum oven in cool off 10min～20min final melting and obtain master alloy at 1min～2min the duration of pouring.
2. according to the described method with K417 revert melting K417G alloy of claim 1, it is characterized in that: the melting specific embodiment of described K417G alloy is as follows,
---change the clear stage: with K417 revert ingot+master alloy material ingot+add crucible that element is put into vacuum oven, then vacuum oven is vacuumized, when vacuum tightness≤0.67Pa, vacuum oven is heated, continue to vacuumize, require molten steel temperature＜1530 ℃, vacuum tightness≤10.66Pa;
---refining stage: require the vacuum tightness≤1.33Pa of vacuum oven, when temperature is 1530 ℃ ± 10 ℃, send power 80kW to enter refining, add whole C refining period, carry out refining 20min～30min after, stopped heating, freezing treatment 25min～30min;
---the cast stage: the molten steel temperature in vacuum oven is 1450 ℃ ± 10 ℃ to be poured into a mould, and is controlled at 1min～2min the duration of pouring, cools off the final melting of 10min～20min after the cast in vacuum oven and gets the K417G alloy.
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| CN102965535B (en) * | 2012-11-15 | 2014-12-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing alloy K414 from return scraps of cast high-temperature alloy K414 |
| CN105420524B (en) * | 2015-11-11 | 2017-05-31 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method that use K417G and DZ417G reverts prepare K424 cast superalloys |
| CN111910095B (en) * | 2020-08-05 | 2021-06-01 | 浙江省科创新材料研究院 | Smelting preparation method of nickel-based single crystal superalloy master alloy |
| CN114369736B (en) * | 2021-12-17 | 2022-08-19 | 北京科技大学 | Nickel-based high-temperature alloy capable of improving use proportion of return materials and smelting process |
| CN114892012A (en) * | 2022-04-25 | 2022-08-12 | 中国航发成都发动机有限公司 | Remelting purification method of nickel-based superalloy return material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100387736C (en) * | 2005-12-22 | 2008-05-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum smelting technology of hafnium containing nickel base casting high temperature alloy K488 reverse material alloy |
| CN101709387A (en) * | 2009-11-27 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting nickel-based high temperature recycled alloy K3030 |
| CN101717865A (en) * | 2009-11-27 | 2010-06-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for melting nickel-base high-temperature return material K441alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387736C (en) * | 2005-12-22 | 2008-05-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum smelting technology of hafnium containing nickel base casting high temperature alloy K488 reverse material alloy |
| CN101709387A (en) * | 2009-11-27 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting nickel-based high temperature recycled alloy K3030 |
| CN101717865A (en) * | 2009-11-27 | 2010-06-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for melting nickel-base high-temperature return material K441alloy |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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Granted publication date: 20131023 Termination date: 20201229 |