CN103695721A - High-strength nickel-based alloy and preparation method thereof - Google Patents
High-strength nickel-based alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-strength nickel-based alloy which comprises the following chemical components in percentage by weight: 3.2-6.8% of Al, 21-28% of Cr, 3.0-4.2% of B, 1.2-1.9% of Si, 0.08-0.2% of C, 1.8-2.8% of Mo, 1.2-2.1% of Nb, 1.0-1.8% of Ta, 0.08-0.98% of Ti, 3.2-5.8% of Fe, 0.2-0.38% of RE, 0.8-1.2% of Cu, 0.002-0.08% of Mn and the balance of Ni and unavoidable impurities. With a specific microstructure obtained by specific alloy collocation and preparation method, the high-strength nickel-based alloy has relatively good strength and toughness as well as good high-temperature property.
Description
Technical field
The invention belongs to field of alloy material, particularly relate to a kind of high strength, nickel based Alloy And Preparation Method.
Background technology
In current industrial circle, exist the severe environmental conditions such as a large amount of abrasion and corrosions, for adapting to the requirement of machine work under extreme Working environment, often need the surface of component to carry out thermal spraying treatment, nickel-base alloy is owing to having good wear resistance and corrosion resistance and be widely used in the thermal spraying material of piece surface, yet in actual applications, it also has very high requirement to intensity, but when intensity improves, often to exert an influence to toughness.
China Patent No. 98116301 is that a kind of applicable manufacture is for welding the stainless nickel-base alloy wiry of super two-phase or super austenitic, point out that composition is 24.5% < Cr≤26.5%, 13.5≤Mo≤16.5%, surplus is the impurity that nickel, optional one or more assistant alloy compositions and technique are brought into, this assistant alloy composition is selected from nitrogen, aluminium and magnesium, and the electrode of manufacturing thus.But same, in the situation that its intensity improves, high-temperature behavior is unsatisfactory, and toughness can not meet day by day various application.
Summary of the invention
One of object of the present invention is to propose a kind of high strength, nickel based alloy;
Two of object of the present invention is to propose a kind of preparation method of high strength, nickel based alloy;
For reaching this object, the present invention by the following technical solutions:
A high strength, nickel based alloy, its chemical composition contains by weight percentage: Al:3.2 ~ 6.8%, Cr:21 ~ 28%, B:3.0 ~ 4.2%, Si:1.2 ~ 1.9%, C:0.08 ~ 0.2%, Mo:1.8 ~ 2.8%, Nb:1.2 ~ 2.1%, Ta:1.0 ~ 1.8%, Ti:0.08 ~ 0.98%, Fe:3.2 ~ 5.8%, RE:0.2 ~ 0.38%, Cu:0.8 ~ 1.2%, Mn:0.002 ~ 0.08%, surplus is Ni and inevitable impurity;
In the microtexture of described high strength, nickel based alloy, γ sosoloid is 1.2 ~ 2.8%, Ni at the shared area percentage in each cross section of alloy
3al is 0.8 ~ 1.1%, Ni at the shared area percentage in each cross section of alloy
3(Al, Ti) strengthening phase is 0.58 ~ 1.25%, γ ' (Ni at the shared area percentage in each cross section of alloy
3al) in alloy center cross section, shared area percentage is 0.02 ~ 0.032%;
The yield strength of described high strength, nickel based alloy is 560 ~ 610MPa, tensile strength 780 ~ 820MPa, unit elongation 42 ~ 51%, the impelling strength 98 ~ 102J/cm of 20 ℃
2.
As preferably, the chemical composition of described high strength, nickel based alloy contains by weight percentage: Al:4.8%, Cr:26%, B:3.8%, Si:1.6%, C:0.18%, Mo:2.28%, Nb:1.91%, Ta:1.7%, Ti:0.28%, Fe:4.8%, RE:0.28%, Cu:0.98%, Mn:0.006%, surplus is Ni and inevitable impurity.
As preferably, described RE is rare earth element y.
As preferably, described RE is cerium-rich mischmetal.
A preparation method for high strength, nickel based alloy, is characterized in that, comprises the steps:
(1) melting, gets the raw materials ready according to the chemical composition of aforementioned high strength, nickel based alloy, adopts the associating smelting technology of vacuum induction, esr and vacuum consumable remelting to smelt;
(2) casting, the molten metal that melting is obtained is cast;
(3) forge, carry out conventional die forging;
(4) homogenizing, at 1120 ~ 1160 ℃ of insulation 15 ~ 22h, carry out the homogenizing of first stage, and then being warmed up to 1180 ~ 1190 ℃, insulation 20 ~ 25h carries out the homogenizing of subordinate phase, and then cools to the homogenizing that 1120 ~ 1160 ℃ of insulation 18 ~ 24h carry out the phase III;
(5) ausrolling, rolling temperature is 980 ~ 1030 ℃, rolling pass is 5 ~ 8;
(6) timeliness thermal treatment, the rolled plate that step (5) is obtained carries out three step timeliness thermal treatments, and the first step is at 710 ~ 720 ℃ of insulation 6 ~ 8h, with 50 ~ 60 ℃/h, cools to the furnace after 610 ~ 620 ℃ subsequently, insulation 7 ~ 9h, air cooling is to room temperature; Second step, for sheet material being heated to 660 ~ 680 ℃ of insulation 5 ~ 7h, cools to the furnace after 580 ~ 600 ℃ with 55 ~ 65 ℃/h subsequently, insulation 5 ~ 7h, and air cooling is to room temperature; The 3rd step, for sheet material being heated to 600 ~ 620 ℃ of insulation 6 ~ 8h, cools to the furnace after 550 ~ 570 ℃ with 45 ~ 55 ℃/h subsequently, insulation 5 ~ 7h, and air cooling, to room temperature, obtains high strength, nickel based alloy.
As preferably, the pouring temperature of described casting is 1380 ~ 1420 ℃.
As preferably, the temperature of described melting is 1610 ~ 1720 ℃.
effect of the present invention is:
By element being selected and the content of concrete element is arranged in pairs or groups, alloy property is increased dramatically;
By specific preparation method, especially specific timeliness and homogenizing are processed, and make the microtexture in alloy have reasonable layout, and not only intensity is largely increased, and toughness is also better improved;
By coordinating of concrete preparation method's thermal treatment and concrete alloying constituent and content, make microtexture obtain reasonable layout, high-temperature behavior is also largely increased.
Embodiment
embodiment 1
A high strength, nickel based alloy, its chemical composition contains by weight percentage: Al:5.8%, Cr:27%, B:3.0 ~ 4.2%, Si:1.8%, C:0.18%, Mo:1.9%, Nb:1.9%, Ta:1.6%, Ti:0.71%, Fe:4.8%, Y:0.28%, Cu:0.8%, Mn:0.06%, surplus is Ni and inevitable impurity;
In the microtexture of described high strength, nickel based alloy, γ sosoloid is 1.8%, Ni at the shared area percentage in each cross section of alloy
3al is 0.98%, Ni at the shared area percentage in each cross section of alloy
3(Al, Ti) strengthening phase is 1.05%, γ ' (Ni at the shared area percentage in each cross section of alloy
3al) in alloy center cross section, shared area percentage is 0.03%;
The yield strength of described high strength, nickel based alloy is 580MPa, tensile strength 790MPa, the impelling strength 99J/cm that unit elongation is 46%, 20 ℃
2.
embodiment 2:
A high strength, nickel based alloy, its chemical composition contains by weight percentage: Al:4.8%, Cr:26%, B:3.8%, Si:1.6%, C:0.18%, Mo:2.28%, Nb:1.91%, Ta:1.7%, Ti:0.28%, Fe:4.8%, RE:0.28%, Cu:0.98%, Mn:0.006%, surplus is Ni and inevitable impurity; Wherein, RE is cerium-rich mischmetal;
In the microtexture of described high strength, nickel based alloy, γ sosoloid is 1.25%, Ni at the shared area percentage in each cross section of alloy
3al is 0.88%, Ni at the shared area percentage in each cross section of alloy
3(Al, Ti) strengthening phase is 1.15%, γ ' (Ni at the shared area percentage in each cross section of alloy
3al) in alloy center cross section, shared area percentage is 0.032%;
The yield strength of described high strength, nickel based alloy is 605MPa, tensile strength 811MPa, the impelling strength 99J/cm that unit elongation is 43%, 20 ℃
2.
embodiment 3:
A preparation method for high strength, nickel based alloy, is characterized in that, comprises the steps:
(1) melting, gets the raw materials ready according to the chemical composition of aforementioned high strength, nickel based alloy, adopts the associating smelting technology of vacuum induction, esr and vacuum consumable remelting to smelt, and the temperature of melting is 1640 ℃;
(2) casting, the molten metal that melting is obtained is cast, and pouring temperature is 1390 ℃;
(3) forge, carry out conventional die forging;
(4) homogenizing, carries out the homogenizing of first stage at 1120 ℃ of insulation 18h, and then is warmed up to 1185 ℃, and insulation 22h carries out the homogenizing of subordinate phase, and then cools to the homogenizing that 1130 ℃ of insulation 21h carry out the phase III;
(5) ausrolling, rolling temperature is 990 ℃, rolling pass is 6;
(6) timeliness thermal treatment, the rolled plate that step (5) is obtained carries out three step timeliness thermal treatments, and the first step is at 715 ℃ of insulation 6 ~ 8h, with 55 ℃/h, cools to the furnace after 615 ℃ subsequently, insulation 8h, air cooling is to room temperature; Second step, for sheet material being heated to 670 ℃ of insulation 6h, cools to the furnace after 590 ℃ with 60 ℃/h subsequently, insulation 6h, and air cooling is to room temperature; The 3rd step, for sheet material being heated to 610 ℃ of insulation 7h, cools to the furnace after 560 ℃ with 50 ℃/h subsequently, insulation 6h, and air cooling, to room temperature, obtains high strength, nickel based alloy.
Claims (7)
1. a high strength, nickel based alloy, is characterized in that: its chemical composition contains by weight percentage: Al:3.2 ~ 6.8%, Cr:21 ~ 28%, B:3.0 ~ 4.2%, Si:1.2 ~ 1.9%, C:0.08 ~ 0.2%, Mo:1.8 ~ 2.8%, Nb:1.2 ~ 2.1%, Ta:1.0 ~ 1.8%, Ti:0.08 ~ 0.98%, Fe:3.2 ~ 5.8%, RE:0.2 ~ 0.38%, Cu:0.8 ~ 1.2%, Mn:0.002 ~ 0.08%, surplus is Ni and inevitable impurity;
In the microtexture of described high strength, nickel based alloy, γ sosoloid is 1.2 ~ 2.8%, Ni at the shared area percentage in each cross section of alloy
3al is 0.8 ~ 1.1%, Ni at the shared area percentage in each cross section of alloy
3(Al, Ti) strengthening phase is 0.58 ~ 1.25%, γ ' (Ni at the shared area percentage in each cross section of alloy
3al) in alloy center cross section, shared area percentage is 0.02 ~ 0.032%;
The yield strength of described high strength, nickel based alloy is 560 ~ 610MPa, tensile strength 780 ~ 820MPa, unit elongation 42 ~ 51%, the impelling strength 98 ~ 102J/cm of 20 ℃
2.
2. high strength, nickel based alloy according to claim 1, is characterized in that: the chemical composition of described high strength, nickel based alloy contains by weight percentage: Al:4.8%, Cr:26%, B:3.8%, Si:1.6%, C:0.18%, Mo:2.28%, Nb:1.91%, Ta:1.7%, Ti:0.28%, Fe:4.8%, RE:0.28%, Cu:0.98%, Mn:0.006%, surplus is Ni and inevitable impurity.
3. high strength according to claim 1 and 2 is pinched base alloy, it is characterized in that: described RE is rare earth element y.
4. high strength, nickel based alloy according to claim 1 and 2, is characterized in that: described RE is cerium-rich mischmetal.
5. a preparation method for high strength, nickel based alloy described in claim 1 ~ 4 any one, is characterized in that, comprises the steps:
(1) melting, gets the raw materials ready according to the chemical composition of high strength, nickel based alloy described in claim 1 ~ 4 any one, adopts the associating smelting technology of vacuum induction, esr and vacuum consumable remelting to smelt;
(2) casting, the molten metal that melting is obtained is cast;
(3) forge, carry out conventional die forging;
(4) homogenizing, at 1120 ~ 1160 ℃ of insulation 15 ~ 22h, carry out the homogenizing of first stage, and then being warmed up to 1180 ~ 1190 ℃, insulation 20 ~ 25h carries out the homogenizing of subordinate phase, and then cools to the homogenizing that 1120 ~ 1160 ℃ of insulation 18 ~ 24h carry out the phase III;
(5) ausrolling, rolling temperature is 980 ~ 1030 ℃, rolling pass is 5 ~ 8;
(6) timeliness thermal treatment, the rolled plate that step (5) is obtained carries out three step timeliness thermal treatments, and the first step is at 710 ~ 720 ℃ of insulation 6 ~ 8h, with 50 ~ 60 ℃/h, cools to the furnace after 610 ~ 620 ℃ subsequently, insulation 7 ~ 9h, air cooling is to room temperature; Second step, for sheet material being heated to 660 ~ 680 ℃ of insulation 5 ~ 7h, cools to the furnace after 580 ~ 600 ℃ with 55 ~ 65 ℃/h subsequently, insulation 5 ~ 7h, and air cooling is to room temperature; The 3rd step, for sheet material being heated to 600 ~ 620 ℃ of insulation 6 ~ 8h, cools to the furnace after 550 ~ 570 ℃ with 45 ~ 55 ℃/h subsequently, insulation 5 ~ 7h, and air cooling, to room temperature, obtains high strength, nickel based alloy.
6. the preparation method of high strength, nickel based alloy according to claim 5, is characterized in that, the pouring temperature of described casting is 1380 ~ 1420 ℃.
7. the preparation method of high strength, nickel based alloy according to claim 6, is characterized in that, the temperature of described melting is 1610 ~ 1720 ℃.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745992A (en) * | 2015-04-26 | 2015-07-01 | 邢桂生 | Thermal treatment method of high-temperature alloy for engine turbine |
| CN105925849A (en) * | 2016-05-04 | 2016-09-07 | 中国第重型机械股份公司 | Control method for nickel-based alloy forgings for 700-DEG C ultra-supercritical steam turbine rotor |
| CN106636760A (en) * | 2017-01-16 | 2017-05-10 | 宁国市华成金研科技有限公司 | Nickel-based high temperature alloy and manufacturing method thereof |
| CN107523772A (en) * | 2016-06-22 | 2017-12-29 | 中国科学院金属研究所 | A kind of homogenization process of U720Li high temperature alloys |
| CN110863099A (en) * | 2019-10-31 | 2020-03-06 | 河钢股份有限公司 | Heat treatment process for improving impact toughness of nickel-iron-based high-temperature alloy plate |
| CN110983111A (en) * | 2019-12-31 | 2020-04-10 | 江苏新华合金有限公司 | Nickel-based high-temperature alloy plate and preparation method thereof |
| CN112139415A (en) * | 2020-09-16 | 2020-12-29 | 江苏隆达超合金航材有限公司 | Method for producing difficult-to-deform nickel-based high-temperature alloy through compensation heating assisted free forging |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104745992A (en) * | 2015-04-26 | 2015-07-01 | 邢桂生 | Thermal treatment method of high-temperature alloy for engine turbine |
| CN105925849A (en) * | 2016-05-04 | 2016-09-07 | 中国第重型机械股份公司 | Control method for nickel-based alloy forgings for 700-DEG C ultra-supercritical steam turbine rotor |
| CN107523772A (en) * | 2016-06-22 | 2017-12-29 | 中国科学院金属研究所 | A kind of homogenization process of U720Li high temperature alloys |
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| CN110863099A (en) * | 2019-10-31 | 2020-03-06 | 河钢股份有限公司 | Heat treatment process for improving impact toughness of nickel-iron-based high-temperature alloy plate |
| CN110863099B (en) * | 2019-10-31 | 2021-09-21 | 河钢股份有限公司 | Heat treatment process for improving impact toughness of nickel-iron-based high-temperature alloy plate |
| CN110983111A (en) * | 2019-12-31 | 2020-04-10 | 江苏新华合金有限公司 | Nickel-based high-temperature alloy plate and preparation method thereof |
| CN112139415A (en) * | 2020-09-16 | 2020-12-29 | 江苏隆达超合金航材有限公司 | Method for producing difficult-to-deform nickel-based high-temperature alloy through compensation heating assisted free forging |
| CN112139415B (en) * | 2020-09-16 | 2022-04-19 | 江苏隆达超合金航材有限公司 | Method for producing difficult-to-deform nickel-based high-temperature alloy through compensation heating assisted free forging |
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Effective date of registration: 20171227 Address after: 529500 Yangjiang Hi-tech Zone Port Industrial Park, seaport three cross road, Guangdong Province, 1 Patentee after: Yangjiang Yi Chuan Metal Technology Co. Ltd. Address before: 523000, Guangdong, Humen Town, South Village, Naval Battle Road, No. A28 Patentee before: Zhang Xia |
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