CN1078261C - Low-expansibility and antioxidant high temperature alloy - Google Patents
Low-expansibility and antioxidant high temperature alloy Download PDFInfo
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- CN1078261C CN1078261C CN99119603A CN99119603A CN1078261C CN 1078261 C CN1078261 C CN 1078261C CN 99119603 A CN99119603 A CN 99119603A CN 99119603 A CN99119603 A CN 99119603A CN 1078261 C CN1078261 C CN 1078261C
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Abstract
The present invention belongs to the technical field of high temperature alloy steel, which is suitable for preparing high-temperature alloy structural members of low expansion and oxidation resistance. In steel types of the prior art, the mechanical performance of high temperature alloy steel can be improved through adjusting each chemical component. The present invention not only has high strength and toughness, low expansion and constant elasticity, but also has better oxidation resistance.
Description
The present invention belongs to the high-temperature alloy steel field of functional materials.Be particularly useful for making high strength, high tenacity, low bulk, permanent elasticity and have the high temperature functional structure material of antioxidant property.
In low expansion superalloy, in order to make alloy keep the lower coefficient of expansion and to prevent that stress from quickening grain boundary oxidation fragility, generally do not add elements such as Cr, Al, cause the antioxidant property of alloy relatively poor, as patent US4200459 (Comparative Examples 1), special permission discloses clear 54-90013, US5192497, the spy opens flat 5-70894 etc., this class alloy does not contain Cr substantially, does not contain or keep lower Al content.In order to improve the antioxidant property of this type of alloy, another kind method is to add more Al and Cr such as patent CN1053094A (Comparative Examples 2), US4006012 etc., be characterized in that antioxidant property is greatly improved, the also corresponding raising of inflatable coefficient is a lot, influences its application as functional materials.At present low expansion superalloy seldom has and adds rare earth in addition.
The objective of the invention is to propose a kind of high temperature alloy that has high strength, high tenacity, low bulk, permanent elasticity and have oxidation-resistance.
Concrete chemical ingredients according to high strength that the object of the invention proposed, high tenacity, low bulk, permanent Elastic reactance oxidation high temperature alloy is (weight %) C 0.001-0.1%, Si 0.05-0.7%, Ni 20-42%, Co10-38%, Ti 1.0-2.5%, Nb 3-6%, B 0.002-0.02%, Cr 0.5-7%, Y, La and rare earth element total amount are 0.001-0.25%, all the other are Fe.
Low expansion superalloy of the present invention is according to the deficiency in the existing low bulk high-temperature material, by the adjustment to each element in this material composition, makes the performance of this alloy reach planner's service requirements.In alloy of the present invention,, can obtain the extremely low material of the coefficient of expansion by adjusting Co, Ni, Fe composition.Wherein the adding of Co makes austenite stable, heat resistance and corrosion and heat resistant raising.The adding of Ti forms the strengthening phase γ ' phase of superalloy.A Nb element part enters γ ' phase, and a part plays the solution strengthening effect in matrix, and these all make the intensity of the general low expansion alloy of this alloy ratio higher.The adding of B is in order to improve grain-boundary strength.The adding of Si has promoted ε in the alloy mutually and Laves separating out mutually, and the toughness of alloy is improved, smooth lastingly, breach increases substantially creep rupture life.Think by research for many years,, should add a small amount of Cr,, add rare earth element y, La etc. simultaneously to form one deck than compact oxide for improving the antioxidant property of low expansion superalloy.The adding of rare earth element has improved the thermodynamic stability of zone of oxidation, reduces the concentration of oxygen in the alloy by rare earth autoxidation and interior oxidation.The inner oxide of rare earth plays " pinning " effect again, has improved the adhesivity of zone of oxidation, and reduces the constant temperature rate of oxidation by " decline " of inhibited oxidation layer, increases the ability of zone of oxidation opposing stress rupture, has promptly improved the bonding strength of zone of oxidation.Rare earth gathers partially at crystal boundary in addition, produces the microalloying effect, and rare earth element mainly exists with the rare earth compound state, as rare earth oxide, rare earth oxysulfide, rare-earth sulfide etc., plays the cleaning action of removing crystal boundary impurity, has increased grain-boundary strength.Because the acting in conjunction of Cr and rare earth is further enhanced the alloy enduring quality, antioxidant property significantly improves than Comparative Examples 1, sees Fig. 3, Fig. 4.In addition, adjust the ratio of elements such as Co, Ni, make austenite more stable, and improved Curie-point temperature, make the coefficient of expansion keep constant in the temperature range of broad, to offset because the increase of Cr to the disadvantageous effect of the coefficient of expansion, remains unchanged the coefficient of expansion substantially, to obtain a kind of high strength, high tenacity, low bulk, permanent elasticity and to have antioxidant property, the high temperature functional structure material of anti-hydrogen performance.
The preparation method of steel of the present invention is solution treatment again after steel ingot is forged, and its heat treating regime is 950-1050 ℃ of solid solution, 700-760 ℃ of one-level timeliness 2-18 hour, and stove is chilled to 580-680 ℃ of secondary time effect 2-18 hour.
Steel of the present invention is compared with the prior art steel and is had good combination property, and its characteristics are that steel of the present invention not only has intensity, toughness height and low bulk, permanent elasticity, but also have good oxidation-resistance.The manufacturing process of this steel is fairly simple, can be processed into the structural part that the planner requires.
Embodiment
The concrete composition scope of steel according to the present invention, we have smelted the low expansion superalloy of the present invention of four stove compositions altogether, and its concrete Chemical Composition sees Table 1.The processing of steel of the present invention is that steel ingot is carried out solution treatment again behind forging and molding, and its heat treating regime is that 980 ℃ of solution treatment and 720 ℃ of 8 hours processing back stoves are chilled to 620 ℃ of insulations 8 hours, handles the back stove and is chilled to room temperature.Its every mechanical property and 650 ℃ of tensile properties see Table 2, and for contrasting conveniently, we exemplify 2 contrast materials.Table 1, table 2 in embodiments of the present invention, accompanying drawing 1, the sequence number 1,2,3 in the accompanying drawing 2 is embodiment of the invention steel.Comparative Examples 1 is US4200459, and Comparative Examples 2 is CN1053094A.
Table 1, table 2 in the file of the present invention, accompanying drawing 1,2,3 explanations.Table 1 is the Chemical Composition (weight %) of steel of the present invention.Table 2 is the mechanical property of steel of the present invention and the comparison of prior art (Comparative Examples steel).Accompanying drawing 1 is the comparison of the antioxidant property of steel of the present invention and compared steel.Accompanying drawing 2 is the comparison of steel of the present invention and compared steel expansion character.Accompanying drawing 3 is the oxide layer shape (700 ℃) of Comparative Examples 1 steel.Accompanying drawing 4 is the chemical ingredients (weight %) of the oxide layer shape of steel of the present invention (700 ℃) table 1 steel of the present invention
Table 2 mechanical property of the present invention and prior art steel are relatively
| Sequence number | C | Si | Ni | Co | Ti | Nb | B | Cr | Y | La | Fe |
| 1 | 0.015 | 0.11 | 38.5 | 14.0 | 1.7 | 4.8 | 0.007 | 0.5 | 0.05 | 0.1 | |
| 2 | 0.01 | 0.28 | 38.0 | 13.5 | 1.2 | 3.2 | 0.004 | 1.0 | 0.005 | 0.045 | |
| 3 | 0.01 | 0.45 | 28.3 | 23.2 | 1.9 | 4.1 | 0.010 | 2.5 | 0.042 | 0.006 | Surplus |
| Sequence number | σ b MPa | σ 0.02 MPa | δ ％ | Φ ％ | 650℃ 510Mpa 1(h) | |
| 1 | 1035 | 897.5 | 13 | 23 | 95 | |
| 2 | 1030 | 935 | 15 | 20 | 93 | |
| 3 | 1050 | 905 | 19 | 39 | 473 | Bar |
| Comparative Examples 1 | 1034 | 862 | 25 | 60 | 94 | Bar |
| Comparative Examples 2 | 955 | 707 | 25 | 36 | 61 | Bar |
Claims (1)
1, a kind of high strength, high tenacity, low bulk, permanent elasticity and oxidation resistant high temperature alloy, the Chemical Composition that it is characterized in that this steel consists of (weight %) and is C 0.001-0.1%, Si 0.05-0.7%, Ni20-42%, Co 10-38%, Ti 1.0-2.5%, Nb 3-6%, B 0.002-0.02%, Cr 0.5-7%, Y, La and rare earth element total amount are 0.001-0.25%, and all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99119603A CN1078261C (en) | 1999-09-21 | 1999-09-21 | Low-expansibility and antioxidant high temperature alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99119603A CN1078261C (en) | 1999-09-21 | 1999-09-21 | Low-expansibility and antioxidant high temperature alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1250109A CN1250109A (en) | 2000-04-12 |
| CN1078261C true CN1078261C (en) | 2002-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99119603A Expired - Fee Related CN1078261C (en) | 1999-09-21 | 1999-09-21 | Low-expansibility and antioxidant high temperature alloy |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252593B (en) * | 2013-04-24 | 2015-07-15 | 中国航空工业集团公司北京航空材料研究院 | Oxidation-resistant low-expansion high-temperature alloy welding wire for gas shielded welding |
| CN104862585A (en) * | 2015-05-08 | 2015-08-26 | 上海蓝铸特种合金材料有限公司 | Ultralow-expansion alloy material and preparing method thereof |
| CN106636968B (en) * | 2015-10-28 | 2019-01-18 | 丹阳市龙鑫合金有限公司 | A kind of iron cobalt nickel alloy cold-strip and its production method |
| CN106636967B (en) * | 2015-10-28 | 2019-04-05 | 丹阳市龙鑫合金有限公司 | A kind of cold-strip and its production method |
| CN106636965B (en) * | 2015-10-28 | 2019-01-18 | 丹阳市龙鑫合金有限公司 | The iron cobalt nickel alloy cold-strip and its production method that grain size is 6~9 grades |
| CN106636966B (en) * | 2015-10-28 | 2019-02-22 | 丹阳市龙鑫合金有限公司 | A kind of iron cobalt nickel alloy cold-strip and its production method |
| CN106636932B (en) * | 2015-10-28 | 2018-12-28 | 丹阳市龙鑫合金有限公司 | The higher iron cobalt nickel alloy cold-strip of uniformity and its production method |
| CN108265233A (en) * | 2018-01-23 | 2018-07-10 | 上海康晟航材科技股份有限公司 | Corrosion-resistant invar alloy |
| CN114351006B (en) * | 2022-01-10 | 2023-02-07 | 深圳市飞亚达精密科技有限公司 | Constant-elasticity alloy material, application and preparation method thereof, and manufacturing method of balance spring |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192497A (en) * | 1990-12-18 | 1993-03-09 | Hitachi Metals, Ltd. | Superalloys with low thermal-expansion coefficient |
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1999
- 1999-09-21 CN CN99119603A patent/CN1078261C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192497A (en) * | 1990-12-18 | 1993-03-09 | Hitachi Metals, Ltd. | Superalloys with low thermal-expansion coefficient |
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