CN104120338A - Method for improving oxidation resistance of precision alloy Ni36 - Google Patents
Method for improving oxidation resistance of precision alloy Ni36 Download PDFInfo
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Abstract
The invention provides a method for improving oxidation resistance of a precision alloy Ni36. The method comprises the following steps: performing working procedures such as electric furnace smelting, AOD (Argon Oxygen Decarburization) refining, LF (Ladle Furnace) refining, continuous casting and plate blank grinding; in the LF refining working procedure, controlling the refining end point to ensure that S is less than or equal to 0.001wt%, and Al is more than or equal to 0.02wt%; then adding one of the following composite additives in percentage by weight: (1) Ti and Zr of which the content range is 0.02-0.10% of Ti and 0.02-0.05% of Zr; (2) rare earth elements Ce and La of which the content range is 0.02-0.1% of Ce and 0.005-0.04% of La; ensuring that Al is more than or equal to 0.02% in percentage by weight in LF furnace refining; ensuring that the content of MnO and FeO in furnace slags is less than or equal to 0.5wt%. The method provided by the invention can be used for ensuring that formed micro particles are uniformly distributed in the alloy by adding the composite additives in a key working procedure of a process route, and can be used for effectively improving the oxidation resistance of the alloy.
Description
Technical field
The invention belongs to Precise Alloy and manufacture field, the smelting, the continuous casting that relate generally to Precise Alloy Ni36 are produced and product use, specifically, relate to a kind of improvement of Precise Alloy Ni36 antioxidant property.
Background technology
Precise Alloy Ni36 is a kind of Rhometal, nickeliferous approximately 36%.Minimum because of its coefficient of expansion, be applicable to doing measuring sensor etc.Be also referred to as Invar alloy, within 1896, first found by the Switzerland physicist Xia Er Edward Yao's nurse (C.E.Guillaume) of recording.Invar alloy at the mean thermal expansion coefficients of near room temperature lower than 10-6 DEG C-1, be mainly used to resonator cavity, gravity meter member, thermo bimetal's group element material of manufacturer's standard chi, thermo detector, stadimeter, verge ring, slip gauge, microwave equipment, opticinstrument parts etc., have new application at aspects such as aircraft wing, LPG ship liners again in recent years.
Most metals and alloy all expand with heat and contract with cold.But due to the ferromegnetism of Invar alloy, it has Anomalous Thermal Expansion phenomenon in certain temperature range, its coefficient of expansion is extremely low, is even zero or negative value sometimes.This alloy is that vicinity of Curie temperatures thermal expansivity significantly reduces at magnetic temperature, occurs so-called Anomalous Thermal Expansion phenomenon (negative unusual), thereby can be in the very wide temperature range of near room temperature, obtains very little zero the coefficient of expansion that even approaches.The composition of this alloy is mainly the Ni of Fe and 36% left and right, is face-centred cubic structure.This alloy is very large to the contribution of scientific progress, this alloy discoverer, and therefore Switzerland's physicist Ji Yao nurse obtains the Nobel Prize in physics of nineteen twenty.
This Precise Alloy Ni36 is usually used in thermo bimetal's group element material, the glass sealing alloy of opticinstrument part, electric elements and hard glass, soft glass, ceramic matched seal.
Because this Precise Alloy is at thermo bimetal's group element material, under the working conditionss such as opticinstrument part, often experiences the circulation change of low temperature-high temperature-low temperature, thereby the antioxidant property of material is had to certain requirement.In the manufacture method of existing Precise Alloy Ni36, due to the restriction of its microstructure and composition, antioxidant property is also not enough.
In order to improve the antioxidant property of this alloy, thereby extend work-ing life and the security of the product of this alloy formation, produce on the basis of Precise Alloy Ni36 Technology at the vertical continuous caster that makes full use of stand-alone development, invent the method for improving Precise Alloy Ni36 antioxidant property, in fact effectively improved the antioxidant property of this alloy.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is, a kind of Precise Alloy Ni36 manufacture method that can improve Precise Alloy Ni36 antioxidant property is provided.The method can meet the needs of producing the Precise Alloy Ni36 that antioxidant property is good.Improve the use properties of this alloy, extend its work-ing life.
Technical scheme of the present invention is, a kind of method of improving Precise Alloy Ni36 antioxidant property, comprise electrosmelting, AOD refining, the refining of LF stove, continuous casting, slab reconditioning operation, wherein, in described LF stove refining procedure, refining terminal control S≤0.001%, Al >=0.02%, then add the one in following composite additive: 1. Ti+Zr, the content range of two kinds of elements is (0.02-0.10wt%) Ti+ (0.02-0.05wt%) Zr; 2. rare earth element ce+La, the content range of two kinds of elements is (0.02-0.1wt%) Ce+ (0.005-0.04wt%) La;
In described LF stove refining procedure, add Al, guarantee Al >=0.02wt%; (MnO+FeO)≤0.5wt% in slag.
The method of improving Precise Alloy Ni36 antioxidant property of the present invention, its composition quality degree of the Precise Alloy Ni36 relating to is generally: C0～0.03, Si0～0.30, Mn0～0.40, Ni35.0～37.0, P≤0.035, S≤0.010, N≤0.040, Cr≤0.25, O≤0.002, Al >=0.02, surplus is Fe and inevitable impurity.Wherein, be mainly included in furnace melting furnace charge, carry out decarburization and desulfurization at AOD stove, and after smelting finishes, adopt Al deoxidation, in LF refining and add Al, carry out afterwards soft stirring.When continuous casting, take strict non-oxidation protection cast and induction stirring measure.
LF liquid alloy and slag composition control are very crucial, suitably add Al, guarantee Al >=0.02%.Keep liquid alloy and the good reductibility of slag, (MnO+FeO)≤0.5% in slag.Be beneficial to interpolation composite additive.Interpolation composite additive can improve the principle of this Alloy Anti oxidation susceptibility: while 1. adding (Ti+Zr), can form TiO
2, TiN, ZrO
2deng particle.2. while adding (Ce+La), can form Ce
2o
3, La
2o
3deng particle.These particles can be gathered in crystal boundary, can stop oxygen further to permeate along crystal boundary, thereby carry heavy alloyed antioxidant property.But, if these particle quantity are too many, will cause Grain-boundary Junctions to make a concerted effort to weaken, destroy the mechanical property of alloy.Very few not the having of quantity of particle should have effect, and quantity too much can cause etching problem.
According to a kind of method of improving Precise Alloy Ni36 antioxidant property of the present invention, preferably, described composite additive carries out soft stirring after adding, and molten steel temperature is tapped in the time of 1430-1470 DEG C, and Ladle Cycling to continuous casting is poured into a mould and next step operation.
Further, described soft churning time is 5-15 minute; Described tapping temperature is 1440-1460 DEG C.
Preferably, in described electrosmelting, furnace charge is melted in energising, and carries out oxygen blast and flux, and oxygen usage quantity is less than 10m
3/ t; And before melting finishes, add a small amount of reductive agent such as ferrosilicon, tapping temperature be controlled at>=1630 DEG C, C>=1.5% melting finishes.After melting finishes, molten steel is poured in ladle, be transported to AOD stove.
In AOD stove, pass into Ar and O
2mixed gas carry out refining, according to the difference of carbon content in molten steel, adjust Ar and O
2blending ratio.In molten steel, after C≤0.02%, add ferrosilicon and metallic aluminium reduction, the ferrosilicon in the past using and the part by weight of metallic aluminium are controlled at 2:1.Sulphur is controlled at S≤0.003% by refining terminal, and after composition is qualified,, tapping, pours molten steel in ladle into when the molten steel temperature >=1600 DEG C, adds appropriate metallic aluminium in ladle before, goes out and just finishes Ladle Cycling to LF stove.In the present invention the ratio of ferrosilicon and metallic aluminium is improved, preferably, in described AOD refining procedure, when after C≤0.02% in molten steel, added ferrosilicon and metallic aluminium reduction, the weight ratio of ferrosilicon and metallic aluminium is controlled at 2.5-3.5:1.Such ratio is conducive to control liquid alloy and slag reductibility.The ratio of Silicon in Ferrosilicon and iron is determined according to ferrosilicon, silicon content 75% left and right of for example 75 ferrosilicon.
More preferably, the weight ratio of described ferrosilicon and metallic aluminium is controlled at 2.8-3.2:1.
In the refining of LF stove, bottom passes into Ar gas molten steel is stirred, but does not allow exposed molten steel face while stirring.For preventing that heated by electrodes process liquid alloy carbon content from increasing, adopt Foam Slag Technology, make slag blanket thickening parcel electric arc.Then adopt above-mentioned interpolation composite additive and other Composition Control measures.
According to a kind of method of improving Precise Alloy Ni36 antioxidant property of the present invention, preferably, in described continuous casting working procedure, pulling rate is 0.4-1.0m/min.
Further, in described continuous casting working procedure, induction stirring electric current is 1200-2000A, and frequency is 2.5～3.5Hz.
Continuous casting whole process adopts protective casting, makes liquid alloy completely cut off air, avoids oxidation.Keep in alloy add constituent content and can significantly not reduce.Adopt induction stirring can make the small particle because adding composite additive formation in alloy be uniformly distributed, ensure that material property is good.Small particle comprises: the TiO while 1. adding (Ti+Zr)
2, TiN, ZrO
2; 2. the Ce while adding (Ce+La)
2o
3, La
2o
3.
Preferably, described slab reconditioning is carried out at normal temperatures, and the reconditioning damage control is at 1-3wt%.
The present invention adopts vertical continuous casting explained hereafter Precise Alloy Ni36, the appropriate a kind of composite additive (have two kinds of composite additives available) that adds in production process, make like this material obtain good antioxidant property, simultaneously, also can not affect recovery rate, the lumber recovery of material, because composite additive consumption is less, cost is substantially constant.
In the critical process of the method for improving Precise Alloy Ni36 antioxidant property of the present invention design in advanced person's (electric furnace+AOD+LF+ vertical continuous casting) special steel technique circuit, add composite additive, and guarantee to add the small particle forming after composite additive and be evenly distributed in alloy.
Compared with existing low expansion alloy production method, the present invention has following beneficial effect:
1, in the time of AOD smelting endpoint, add ferrosilicon and metallic aluminium reduction, weight ratio is controlled at (2.5-3.5): 1.Control LF liquid alloy and slag composition, guarantee Al >=0.02%.(MnO+FeO)≤0.5% in slag.Be beneficial to interpolation composite additive.
2, add composite additive.Select in three kinds below a kind of: 1. compound interpolation Ti+Zr, the content range of two kinds of elements is (0.02-0.10wt%) Ti+ (0.02-0.05wt%) Zr; 2. add Rare-Earth Ce+La, the content range of two kinds of elements is (0.02-0.1wt%) Ce+ (0.005-0.04wt%) La.After interpolation, carry out soft stirring 5-15 minute, the effectively inclusion of exclusive segment large-size, ensures liquid alloy purity.
3, continuous casting whole process adopts protective casting, makes liquid alloy completely cut off air, avoids oxidation.Adopt induction stirring can make, because the small particle that adds composite additive formation is uniformly distributed, to obtain antioxidant property well.Small particle comprises: the TiO while 1. adding (Ti+Zr)
2, TiN, ZrO
2; In continuously cast bloom, particle quantity is controlled at 40-90/mm
2.2. the Ce while adding (Ce+La)
2o
3, La
2o
3; In continuously cast bloom, particle quantity is controlled at 10-30/mm
2.
4, at 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, add oxidated layer thickness that the Precise Alloy Ni36 of the composite additives such as Zr-Ti and mishmetal forms than the not obvious reduction of adding composite additive, wherein add the better effects if of mishmetal.
Embodiment
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, add oxidated layer thickness that the Precise Alloy Ni36 of the composite additives such as Zr-Ti and mishmetal forms than the not obvious reduction of adding composite additive, wherein add the better effects if of mishmetal, as shown in table 1.
Several alloy oxidation layer thicknesses under table 1 experiment condition
| Technic metal | Empty sample | Add (Zr+Ti) | Add (Ce+La) |
| Oxidated layer thickness/μ m | 515 | 478 | 420 |
Table 2 has been listed the alloy that the present invention relates to and has been added aspect the content of element and antioxidant property and the difference of comparative example.Comparative example steel grade does not add composite additive.Concrete composition is as follows:
The chemical composition (wt%) of table 2 embodiment and comparative example
Comparative example 7-9 technique is described:
The main technique of the Precise Alloy Ni36 of comparative example 7-9: concrete composition is in table 2.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, only with ferrosilicon, without metallic aluminium.Do not add Al at LF, conventionally Al<0.01%.Meanwhile, the about 1-1.5% of slag (MnO+FeO).After refining, carry out soft stirring 3-8 minute.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 0.4-0.6m/min, does not adopt induction stirring.Conventionally under the metallographicobservation of 500 times, TiO in continuously cast bloom
2, TiN, ZrO
2, Ce
2o
3, La
2o
3be less than 3/mm etc. the quantity of various small particles
2.
Embodiment 1:
Add the Precise Alloy Ni36 of (Ti+Zr), main component: C0.01%, Si0.30%, Mn0.05%, Cr0.1%, Ni36.2%, P0.020%, S0.001%, O0.0018%, Al0.023%, Ti0.02%, Zr0.05%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 3:1.Add Al at LF, make Al=0.03%.Meanwhile, slag (MnO+FeO)=0.3%.Compound interpolation (Ti+Zr), Ti=0.02wt% in alloy, Zr=0.05wt%; After interpolation, carry out soft stirring 10 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 0.4m/min, induction stirring electric current 1500A, frequency is 3.0Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and the TiO existing in steel
2, TiN, ZrO
2on average approximately 40/mm2 of quantity, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 463 μ m, reduce approximately 52 μ m than comparative example 7 oxidated layer thickness.
Embodiment 2:
Add the Precise Alloy Ni36 of Ti, main component: C0.02%, Si0.15%, Mn0.34%, Cr0.2%, Ni35.0%, P0.025%, S0.002%, O0.0022%, Al0.023%, Ti0.1%, Zr0.02%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 2.5:1.Add Al at LF, make Al=0.02%.Meanwhile, slag (MnO+FeO)=0.5%.Compound interpolation (Ti+Zr), Ti=0.1wt% in alloy, Zr=0.02wt%; After interpolation, carry out soft stirring 15 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 1.0m/min, induction stirring electric current 2000A, frequency is 3.5Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and on average approximately 85/mm2 of TiO2, the TiN existing in steel, the quantity of ZrO2, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 420 μ m, reduce approximately 95 μ m than comparative example 7 oxidated layer thickness.
Embodiment 3:
Add the Precise Alloy Ni36 of Ti, main component: C0.03%, Si0.25%, Mn0.22%, Cr0.2%, Ni35.5%, P0.019%, S0.001%, O0.0020%, Al0.021%, Ti0.07%, Zr0.03%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 3:1.Add Al at LF, make Al=0.02%.Meanwhile, slag (MnO+FeO)=0.5%.Compound interpolation (Ti+Zr), Ti=0.07wt% in alloy, Zr=0.03wt%; After interpolation, carry out soft stirring 15 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 0.8m/min, induction stirring electric current 1800A, frequency is 3.5Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and on average approximately 66/mm of TiO2, the TiN existing in steel, the quantity of ZrO2
2, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 420 μ m, reduce approximately 85 μ m than comparative example 8 oxidated layer thickness.
Embodiment 4:
Add the Precise Alloy Ni36 of (Ti+Zr),, main component: C0.01%, Si0.25%, Mn0.25%, Cr0.2%, Ni36.9%, P0.035%, S0.003%, O0.0023%, Al0.032%, Ce0.02%, La0.04%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 2.5:1.Add Al at LF, make Al=0.035%.Meanwhile, slag (MnO+FeO)=0.3%.Compound interpolation (Ce+La), Ce=0.02% in alloy, La=0.04wt%; After interpolation, carry out soft stirring 10 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 0.4m/min, induction stirring electric current 2000A, frequency is 2.5Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and the Ce existing in steel
2o
3, La
2o
3on average approximately 21/mm of quantity
2, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 470 μ m, reduce approximately 45 μ m than comparative example 8 oxidated layer thickness.
Embodiment 5:
Add the Precise Alloy Ni36 of Ti, main component: C0.03%, Si0.30%, Mn0.18%, Cr0.1%, Ni35.6%, P0.008%, S0.001%, O0.0028%, Al0.026%, Ce0.1%, La0.005%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 3.5:1.Add Al at LF, make Al=0.025%.Meanwhile, slag (MnO+FeO)=0.5%.Compound interpolation (Ce+La), Ce=0.1% in alloy, La=0.005wt%; After interpolation, carry out soft stirring 5 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 1.0m/min, induction stirring electric current 1200A, frequency is 3.5Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and the Ce existing in steel
2o
3, La
2o
3on average approximately 29/mm of quantity
2, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 413 μ m, reduce approximately 102 μ m than comparative example 9 oxidated layer thickness.
Embodiment 6:
Add the Precise Alloy Ni36 of Ti, main component: C0.02%, Si0.06%, Mn0.17%, Cr0.2%, Ni36.2%, P0.015%, S0.002%, O0.0028%, Al0.026%, Ce0.07%, La0.023%.Production Flow Chart is: electric furnace-AOD-LF stove refining-sheet billet continuous casting.When the reduction of AOD smelting process, ferrosilicon and metallic aluminium weight ratio are controlled at 3.5:1.Add Al at LF, make Al=0.025%.Meanwhile, slag (MnO+FeO)=0.5%.Compound interpolation (Ce+La), Ce=0.07% in alloy, La=0.023wt%; After interpolation, carry out soft stirring 5 minutes.Continuous casting whole process adopts protective casting, and isolated air is avoided oxidation.Pulling speed of continuous casting 0.9m/min, induction stirring electric current 1500A, frequency is 3.5Hz.Continuously cast bloom is carried out to small particle analysis to be shown: through the metallographicobservation of 500 times, and the Ce existing in steel
2o
3, La
2o
3on average approximately 22/mm of quantity
2, and be evenly distributed.
At 5%O
2-15%CO
2-80%N
2atmosphere, under 1200 DEG C of insulations condition of 4 hours, oxidated layer thickness approximately 413 μ m, reduce approximately 102 μ m than comparative example 9 oxidated layer thickness.
The present invention is by adding composite additive in the critical process in technique circuit, and the small particle that makes it to form is evenly distributed in alloy, can effectively improve the antioxidant property of alloy.
Claims (9)
1. one kind is improved the method for Precise Alloy Ni36 antioxidant property, comprise electrosmelting, AOD refining, the refining of LF stove, continuous casting, slab reconditioning operation, it is characterized in that: in described LF stove refining procedure, refining terminal control S≤0.001%, Al >=0.02%, then add the one in following composite additive: 1. Ti+Zr, the content range of two kinds of elements is (0.02-0.10wt%) Ti+ (0.02-0.05wt%) Zr; 2. rare earth element ce+La, the content range of two kinds of elements is (0.02-0.1wt%) Ce+ (0.005-0.04wt%) La;
In described LF stove refining procedure, add Al, guarantee Al >=0.02wt%; (MnO+FeO)≤0.5wt% in slag.
2. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 1, it is characterized in that, described composite additive carries out soft stirring after adding, and molten steel temperature is tapped in the time of 1430-1470 DEG C, and Ladle Cycling to continuous casting is poured into a mould and next step operation.
3. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 2, is characterized in that, described soft churning time is 5-15 minute; Described tapping temperature is 1440-1460 DEG C.
4. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 1, is characterized in that, in described electrosmelting, furnace charge is melted in energising, and carries out oxygen blast and flux, and oxygen usage quantity is less than 10m
3/ t; And before melting finishes, add a small amount of reductive agent such as ferrosilicon, tapping temperature be controlled at>=1630 DEG C, C>=1.5% melting finishes.
5. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 1, it is characterized in that, in described AOD refining procedure, when after C≤0.02% in molten steel, add ferrosilicon and metallic aluminium reduction, the weight ratio of ferrosilicon and metallic aluminium is controlled at 2.5-3.5:1.
6. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 5, is characterized in that, the weight ratio of described ferrosilicon and metallic aluminium is controlled at 2.8-3.2:1.
7. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 1, is characterized in that, in described continuous casting working procedure, pulling rate is 0.4-1.0m/min.
8. according to a kind of method of improving Precise Alloy Ni36 antioxidant property described in claim 1 or 7, it is characterized in that, in described continuous casting working procedure, induction stirring electric current is 1200-2000A, and frequency is 2.5～3.5Hz.
9. a kind of method of improving Precise Alloy Ni36 antioxidant property according to claim 1, is characterized in that, described slab reconditioning is carried out at normal temperatures, and the reconditioning damage control is at 1-3wt%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492600A (en) * | 2017-08-11 | 2017-12-19 | 京东方科技集团股份有限公司 | The manufacture method and display device of display panel, display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57207160A (en) * | 1981-06-17 | 1982-12-18 | Kawasaki Steel Corp | Low thermal expansion invar type fe-ni alloy with superior rust resistance |
| CN102337475A (en) * | 2011-10-13 | 2012-02-01 | 宝山钢铁股份有限公司 | Method for manufacturing extra-low oxygen low-expansion alloy |
-
2013
- 2013-04-27 CN CN201310152770.3A patent/CN104120338B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57207160A (en) * | 1981-06-17 | 1982-12-18 | Kawasaki Steel Corp | Low thermal expansion invar type fe-ni alloy with superior rust resistance |
| CN102337475A (en) * | 2011-10-13 | 2012-02-01 | 宝山钢铁股份有限公司 | Method for manufacturing extra-low oxygen low-expansion alloy |
Non-Patent Citations (1)
| Title |
|---|
| 于彦冲等: "铈及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响", 《中国稀土学报》, vol. 30, no. 2, 30 April 2012 (2012-04-30), pages 175 - 180 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492600A (en) * | 2017-08-11 | 2017-12-19 | 京东方科技集团股份有限公司 | The manufacture method and display device of display panel, display panel |
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