CN1009209B - Process for improving performance of high alloying castings - Google Patents
Process for improving performance of high alloying castingsInfo
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- CN1009209B CN1009209B CN 86108748 CN86108748A CN1009209B CN 1009209 B CN1009209 B CN 1009209B CN 86108748 CN86108748 CN 86108748 CN 86108748 A CN86108748 A CN 86108748A CN 1009209 B CN1009209 B CN 1009209B
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Abstract
The present invention provides a method for improving the performance of high alloying castings. In the method, a proper amount of Mg is added into casting alloy with the compositions (percentage by weight) of 2.5 to 25.5% of Cr, 0 to 16.0% of Co, 0 to 18.0% of Fe, 0.88 to 5.7% of Al, 0.83 to 5.3% of Ti, 0 to 0.9% of V, 0 to 5.1% of Nb, 0.045 to 0.22% of C, 1.0 to 6.25% of Mo, 0 to 14.8% of W, 0 to 0.02% of B, 0 to 0.1% of Zr, and the remainders are Ni or a casting temperature is raised simultaneously. Due to the adoption of the method, microscopic segregation can be obviously reduced, and primary eutectic carbide and other eutecticums can be finely divided in order to acquire the persistent performance of the original high casting alloy and improve impact resistance obviously.
Description
The invention relates to high alloyage casting alloy.
Along with the application of aviation, navigation industrial expansion and industry gas turbine, the environment for use of superalloy is abominable day by day, thereby its use properties is proposed requirements at the higher level.Consider that the alloy crystal boundary becomes weak link in 500～1100 ℃ of operating temperature ranges, for this reason, carried out number of research projects both at home and abroad.At present, a series of performance levels very high Ni base and other high alloyage casting alloys have been developed.As: In-100, a class alloy (see " the superalloy handbook), these alloys have excellent mechanical property.But the content of the main alloy element of these alloys near or reach capacity, be difficult to improve alloy property by improving alloying level again, and the high-alloying of alloy brings serious microsegregation, thereby cause large particle carbide segregation phase and hetero-organization instability thereof that alloy produces, toughness reduces the widespread use that has hindered this class alloy.Inconel718 one class alloy and for example, Applicable temperature is lower, and poor toughness is difficult to satisfy the needs that use under the high temperature mal-condition.In order to address the above problem, can be improved by the method for accelerating speed of cooling, but this method often is difficult to realization on working condition, perhaps want corresponding increase casting equipment and other consumption in order to accelerate speed of cooling.
The object of the present invention is to provide a kind of high alloyage casting alloy, the method for use can reduce the microsegregation of existing high alloyage casting alloy, improves the stability and the toughness of alloy, and is simple and easy to do again.
The method that the present invention adopts is to be (weight percent) 2.5～25.5%Cr at composition, 0～16%Co, 0～18.0%Fe, 0.88～5.7%Al, 0.83～5.3%Ti, 0～0.9%V, 0～5.1%Nb, 0.045～0.22%C, 1.0～6.25%Mo, 0～14.8%W, 0～0.02%B, 0～0.1%Zr, surplus is to add 0.001～0.020%Mg in the Ni casting alloy.
After adding an amount of Mg, alloy branch crystal segregation and eutectic segregation all obviously reduce, and performance obviously improves, and then the amplitude that improves of performance is bigger after improving 40～60 ℃ of teeming temperatures simultaneously.
Embodiment one sees Table 1,2:
Find out that by table 1 and table 2 enduring quality of In-100M alloy and impelling strength all obtain raising.
Bring up to 1470 ℃ when teeming temperature by 1420 ℃, the impelling strength increase rate of In-100M increases to 89.1% by 18.6%, and effect is more remarkable.
From the secondary dendrite phasor of In-100 alloy (Fig. 1 a) and the secondary dendrite phasor (Fig. 1 b) of In-100M alloy as can be seen In-100M reduce than the secondary dendrite arm spacing of In-100 alloy, the size and the quantity of r+r ' phase eutectic reduce by 16.9% and 34.6% respectively.Above-mentioned tissue changes explanation, adds an amount of Mg and corresponding raising teeming temperature in the alloy, and its microsegregation obviously reduces.
Embodiment two sees Table 3:
The listed heat treatment of alloy technology of table 3 is:
1100 ℃/1 hour/air cooling+980 ℃/1 hour/air cooling+720 ℃/16 hours/air cooling.
Alloy is measured the room temperature impact property after thermal treatment, the result shows: the α k value of Inconel718 alloy (as cast condition) is 32.5J/cm
2, the α k value of Inconel718M alloy is 55.1J/cm
2, increasing degree is 69.5%.
(Fig. 2 a) He the Inconel718M secondary dendrite phasor (Fig. 2 b) can find out that the secondary dendrite arm spacing of Inconel718M significantly reduces from Inconel718 secondary dendrite phasor.
Superiority of the present invention is not need to increase expensive installations and facilities and change original alloy substrate composition, only adds an amount of Mg and adjusts the obvious raising that casting technique can obtain former high alloyage casting alloy performance a little.This method is easy to use in practice, is applicable to other high alloyage casting alloys too, comprises that carbon content is higher, and the casting alloy and the foundry goods of more primary carbide eutectic arranged.The performance raising of high alloyage casting alloy and the major obstacles of further alloying have been broken through.
Embodiment one:
Table 1 In-100 alloy and add the In-100M alloy composition (weight percent) of Mg
Alloy C Si Mn Cr Co Mo
In-100 0.15 0.08 ＜0.01 9.50 13.75 3.20
In-100M 0.16 0.08 ＜0.01 9.03 14.50 3.18
Al Ti V Ni Fe S P
5.20 surplus in the of 4.65 0.72 0.69 0.002 0.005
5.10 surplus in the of 4.80 0.74 0.34 0.002 0.006
B Zr Mg
0.012 0.099
0.012 0.097 0.0074
An amount of Mg of table 2 is to the influence of In-100 alloy mechanical property
Room temperature tensile performance room temperature
Alloy sigma
bσ
0.2δ ψ impacts
αk
（MPa） （MPa） （%） （%） （J/Cm
2）
In-100 951 784 11.8 13.6 47.8
In-100M 1013 759 13.2 14.9 56.5
700 ℃, lasting 900 ℃ of lasting 900 ℃ of 745MPa, 314MPa, 343MPa are lasting
τ δ ψ τ δ ψ τ δ ψ
（hr） （%） （%） （hr） （%） （%） （hr） （%） （%）
152 2.39 6.04 77 4.68 9.29 40 4.73 8.07
270 4.60 8.40 117 5.43 9.85 60 6.13 12.09
Processing condition: teeming temperature is 1470 ℃.
Table 3 Inconel 718 alloys and add the Inconel 718M alloy composition (weight percent) of Mg
Alloy C Fe Mo Ti Cr Si Ni
Surplus the Inconel718 0.068 18.3 3.14 1.20 19.16 0.18
Surplus the Inconel718M 0.063 18.3 3.14 1.20 19.16 0.18
Nb P S B Mn Al Mg
5.25 ＜0.005 0.014 0.0081 ＜0.01 0.61
5.15 ＜0.005 0.014 0.0081 ＜0.01 0.61 0.0062
Claims (1)
1, a kind of high alloyage casting alloy is characterized in that its chemical ingredients (weight %) is: Cr2.5～25.5%, Co0～16%, Fe0～18.0%, Al0.88～5.7%, Ti0.83～5.3%, VO～0.9%, Nb5.1%, C0.045～0.22%, Mo1.0～6.25%, W14.8%, B0～0.02%, Zr0～0.1%, Mg0.001～0.020%, the Ni surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108748 CN1009209B (en) | 1986-12-27 | 1986-12-27 | Process for improving performance of high alloying castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108748 CN1009209B (en) | 1986-12-27 | 1986-12-27 | Process for improving performance of high alloying castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86108748A CN86108748A (en) | 1988-08-10 |
| CN1009209B true CN1009209B (en) | 1990-08-15 |
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ID=4804044
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108748 Expired CN1009209B (en) | 1986-12-27 | 1986-12-27 | Process for improving performance of high alloying castings |
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| Country | Link |
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| CN (1) | CN1009209B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102876953A (en) * | 2012-09-27 | 2013-01-16 | 无锡宏昌五金制造有限公司 | High-temperature nickel-chromium alloy |
| CN103484686A (en) * | 2013-09-27 | 2014-01-01 | 北京科技大学 | Method for refining H13 die steel carbides |
| CN103695718B (en) * | 2013-11-25 | 2015-11-25 | 李露青 | The high-strength nickel niobium alloy material that a kind of zirconium, chromium strengthen |
| CN103695716B (en) * | 2013-12-09 | 2015-11-25 | 朱育盼 | The high-strength nickel niobium alloy material that a kind of zirconium, tantalum strengthen |
| CN103695717B (en) * | 2013-12-09 | 2015-11-25 | 朱育盼 | The high-strength nickel niobium alloy material that a kind of zirconium, tantalum strengthen |
| CN103695720B (en) * | 2013-12-09 | 2015-11-25 | 朱育盼 | The high-strength nickel niobium alloy material that a kind of chromium, tantalum strengthen |
| CN103898371B (en) * | 2014-02-18 | 2016-04-06 | 上海发电设备成套设计研究院 | 700 DEG C of grade ultra supercritical coal power station nickel base superalloys and preparation thereof |
| CN104480350A (en) * | 2014-10-20 | 2015-04-01 | 江苏青阳管业有限公司 | Anticorrosion alloy plating for equipment |
| CN109182844B (en) * | 2018-11-16 | 2020-01-10 | 泰尔重工股份有限公司 | High-temperature alloy metallurgical blade and manufacturing method thereof |
| CN111893388B (en) * | 2020-08-07 | 2021-04-13 | 阳春新钢铁有限责任公司 | Corrosion-resistant steel bar and production process thereof |
| CN112410616B (en) * | 2020-11-03 | 2022-07-12 | 中国航发北京航空材料研究院 | Low-cost and low-macrosegregation-tendency high-temperature alloy for large isothermal forging die |
| CN112705700B (en) * | 2020-12-18 | 2022-02-08 | 山东大学 | Method for improving high-temperature strength of Inconel 718 laser deposition layer |
-
1986
- 1986-12-27 CN CN 86108748 patent/CN1009209B/en not_active Expired
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| CN86108748A (en) | 1988-08-10 |
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