CN109852896A - The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion - Google Patents
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion Download PDFInfo
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- CN109852896A CN109852896A CN201910304030.4A CN201910304030A CN109852896A CN 109852896 A CN109852896 A CN 109852896A CN 201910304030 A CN201910304030 A CN 201910304030A CN 109852896 A CN109852896 A CN 109852896A
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- invar alloy
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- low thermal
- thermal expansion
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Abstract
The invention discloses a kind of manufacturing methods of the Fe-36Ni invar alloy plate of low thermal expansion, the following steps are included: S1, by invar alloy plate each component raw material through vacuum melting furnace smelt, be cast into ingot casting, the invar alloy plate includes following weight percent composition: C 0.21~0.22%, Mo 1.65~1.85%, Ti 0.05~0.1%, Nb 0.15~0.18%, Ni 35~37%, surplus Fe；S2, by melting ingot casting through electroslag remelting；S3, resmelting ingot are prepared as slab, the slab thickness is 140~180mm through high temperature forging；S4, steel slab surface are after reconditioning, and multistage hot deformation is at the plate with a thickness of 9~10mm on strip rolling mill, and breaking down temperature is 1050~1100 DEG C when the hot rolling, and finishing temperature is 820~850 DEG C, and the reduction ratio rolled per pass is 5~8%.The method of the present invention maintains low thermal coefficient of expansion on the basis of not changing invar alloy plate composition of alloy, and improves plate yield strength.
Description
Technical field
The present invention relates to a kind of manufacturing methods of invar alloy plate, more particularly to a kind of Fe-36Ni of low thermal expansion
The manufacturing method of invar alloy plate.
Background technique
Invar alloy is since 1896 are found, since it has pole in room temperature to Tc (Curie temperature) temperature range
Low thermal expansion coefficient, therefore by prolonged application in industrial circles such as national defence, aerospace, precision instrumentations, with Fe-36Ni
Invar alloy is that the low-expansion alloy of representative also becomes classical functional material.But traditional invar alloy is due to high Ni
Content keeps single phase austenite tissue within the scope of very wide temperature, cause its room temperature intensity it is lower (MPa of Rel≤300,
The MPa of Rm≤500), limit potential application of its low expansion character on structural material component.Using solution strengthening mode,
Although the substantial increase of alloy content can effectively improve base in the invar alloy system such as Fe-Ni-C, Fe-Ni-Mn-C, Fe-Ni-Co
Body alloy strength, but low expansion character is significantly affected.To avoid high-performance invar alloy due to excessive alloying element is added
Increase its thermal expansion coefficient, the prior art is designed using the ingredient of microalloying, strong in conjunction with alloy substrate refined crystalline strengthening and precipitating
Change mode can effectively promote alloy strength, and stablize the thermal expansion coefficient of invar alloy in reduced levels.But for
The Fe-36Ni invar alloy of same alloy ingredient design, the prior art are not given at the low thermal coefficient of expansion for remaining stable
On the basis of further increase the technical solution of Fe-36Ni invar alloy yield strength.
Summary of the invention
The object of the present invention is to provide a kind of manufacturing methods of the Fe-36Ni invar alloy plate of low thermal expansion, are keeping
The yield strength of Fe-36Ni invar alloy plate is improved under the premise of low thermal coefficient of expansion.
The technical scheme is that such: a kind of manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion,
The following steps are included:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, the invar alloy plate
Material include following weight percent composition: C0.21~0.22%, Mo1.65~1.85%, Ti0.05~0.1%, Nb0.15~
0.18%, Ni35~37%, surplus Fe；
S2, by melting ingot casting through electroslag remelting；
S3, resmelting ingot are prepared as slab, the slab thickness is 140~180mm through high temperature forging；
S4, steel slab surface are after reconditioning, and multistage hot deformation is at the plate with a thickness of 9~10mm, institute on strip rolling mill
When stating hot rolling breaking down temperature be 1050~1100 DEG C, finishing temperature be 820~850 DEG C, the reduction ratio rolled per pass be 5~
8%.
Preferably, make P≤0.002% in ingot, S≤0.002%, O≤0.0015% when the electroslag remelting, N≤
0.0015%.
Preferably, the breaking down temperature is 1050~1060 DEG C, and finishing temperature is 840~850 DEG C.
Preferably, the reduction ratio rolled per pass is 7~8%.
The beneficial effect of technical solution provided by the present invention is to avoid passing through adjustment design of alloy to improve plate
Yield strength bring thermal expansion coefficient increases problem, uses low finishing temperature and low percentage pass reduction rolling side in hot rolling
Case rolls state alloy based on single phase austenite, and recrystallization austenite grain size is more tiny, the high region Taylor ratio
It is bigger, so that plate yield strength is improved；Additionally by the variation of rolling mill practice, deformation texture and recrystallization are knitted in plate
The structure low angle orientation declinate frequency of occurrences is got higher, and 0~45 ° and > 45 ° of the orientation declinate frequency of occurrences is lower, and texture intensity mentions
Height can get lower thermal expansion coefficient.Raising plate yield strength, which is controlled, by hot rolling technology adjusts conjunction compared with prior art
The method of golden ingredient, production process are more easily controlled, and cost is lower.
Detailed description of the invention
Fig. 1 is the metallographic structure figure for the sample that embodiment 1 obtains.
Fig. 2 is the precipitated phase organization chart for the sample that embodiment 1 obtains.
Fig. 3 is the Taylor factor distribution map for the sample that embodiment 1 obtains.
Fig. 4 is the crystal boundary distribution map for the sample that embodiment 1 obtains.
Fig. 5 is the metallographic structure figure for the sample that comparative example 1 obtains.
Fig. 6 is the precipitated phase organization chart for the sample that comparative example 1 obtains.
Fig. 7 is the Taylor factor distribution map for the sample that comparative example 1 obtains.
Fig. 8 is the crystal boundary distribution map for the sample that comparative example 1 obtains.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but not as a limitation of the invention.
Embodiment 1
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 12 passages are rolled into a thickness of 9mm on strip rolling mill, when hot rolling
Breaking down temperature is 1050 DEG C, and finishing temperature is 850 DEG C, and the reduction ratio rolled per pass is 7.8%.
Phase constitution, the distribution of the Taylor factor and crystal boundary distribution point is precipitated in the metallographic structure for the sample that the present embodiment obtains
Not not as shown in Figures 1 to 4.
Embodiment 2
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 13 passages are rolled into a thickness of 9mm on strip rolling mill, when hot rolling
Breaking down temperature is 1060 DEG C, and finishing temperature is 840 DEG C, and the reduction ratio rolled per pass is 7.2%.
Embodiment 3
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 15 passages are rolled into a thickness of 9mm on strip rolling mill, when hot rolling
Breaking down temperature is 1080 DEG C, and finishing temperature is 830 DEG C, and the reduction ratio rolled per pass is 6.2%.
Embodiment 4
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 18 passages are rolled into a thickness of 9mm on strip rolling mill, when hot rolling
Breaking down temperature is 1080 DEG C, and finishing temperature is 830 DEG C, and the reduction ratio rolled per pass is 5.2%.
Embodiment 5
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.21%, Mo1.85%, Ti0.07%, Nb0.18%, Ni35%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 180mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 12 passages are rolled into a thickness of 10mm on strip rolling mill, when hot rolling
Breaking down temperature is 1050 DEG C, and finishing temperature is 850 DEG C, and the reduction ratio rolled per pass is 7.9%.
Embodiment 6
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.216%, Mo1.65%, Ti0.06%, Nb0.17%, Ni37%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 180mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 13 passages are rolled into a thickness of 10mm on strip rolling mill, when hot rolling
Breaking down temperature is 1050 DEG C, and finishing temperature is 850 DEG C, and the reduction ratio rolled per pass is 7.3%.
Embodiment 7
The manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.216%, Mo1.7%, Ti0.05%, Nb0.18%, Ni35%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 180mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 16 passages are rolled into a thickness of 10mm on strip rolling mill, when hot rolling
Breaking down temperature is 1050 DEG C, and finishing temperature is 850 DEG C, and the reduction ratio rolled per pass is 5.9%.
Comparative example 1
The manufacturing method of Fe-36Ni invar alloy plate, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 8 passages are rolled into a thickness of 9mm on strip rolling mill, at the beginning of when hot rolling
Rolling temperature is 1050 DEG C, and finishing temperature is 1000 DEG C, and the reduction ratio rolled per pass is 11.7%.
Phase constitution, the distribution of the Taylor factor and crystal boundary distribution point is precipitated in the metallographic structure for the sample that this comparative example obtains
Not as shown in Fig. 5 to Fig. 8.
Comparative example 2
The manufacturing method of Fe-36Ni invar alloy plate, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 8 passages are rolled into a thickness of 9mm on strip rolling mill, at the beginning of when hot rolling
Rolling temperature is 1050 DEG C, and finishing temperature is 850 DEG C, and the reduction ratio rolled per pass is 11.7%.
Comparative example 3
The manufacturing method of Fe-36Ni invar alloy plate, comprising the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, invar alloy plate packet
Containing following weight percent composition: C0.22%, Mo1.8%, Ti0.1%, Nb0.15%, Ni36%, surplus Fe；
S2, by melting ingot casting through electroslag remelting, and control P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N
≤ 0.0015%；
S3, resmelting ingot are prepared as slab, slab thickness 140mm through high temperature forging；
S4, steel slab surface are after reconditioning, the plate that 12 passages are rolled into a thickness of 9mm on strip rolling mill, when hot rolling
Breaking down temperature is 1050 DEG C, and finishing temperature is 1000 DEG C, and the reduction ratio rolled per pass is 7.8%.
The hot rolled alloy plate of each embodiment and comparative example is tested using 5582 type electronic universal material testing machine of Instron
Yield strength, using the test of 402 type thermal dilatometer of Germany Netzsch DIL, sample takes thermal expansion coefficient along rolling direction
Sample, having a size of 6 × 9mm of φ, Range of measuring temp is 0 DEG C to 100 DEG C, temperature rise rate 2K/s；Measure the choosing of sample microhardness
With Tukon 2100B type Vickers, load 5kg, load retention time 10s choose 6 measurement points, calculate average value.
Test result is as follows table
| Yield strength/MPa | Thermal expansion coefficient/(0~100 DEG C, 10-6/℃) | |
| Embodiment 1 | 512 | 1.5 |
| Embodiment 2 | 509 | 1.3 |
| Embodiment 3 | 491 | 1.6 |
| Embodiment 4 | 487 | 1.8 |
| Embodiment 5 | 516 | 1.5 |
| Embodiment 6 | 507 | 1.5 |
| Embodiment 7 | 510 | 1.4 |
| Comparative example 1 | 445 | 2.3 |
| Comparative example 2 | 452 | 2.1 |
| Comparative example 3 | 455 | 2.1 |
Claims (4)
1. a kind of manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion, which comprises the following steps:
S1, invar alloy plate each component raw material is smelted through vacuum melting furnace, is cast into ingot casting, the invar alloy plate packet
Containing following weight percent composition: C 0.21~0.22%, Mo 1.65~1.85%, Ti 0.05~0.1%, Nb 0.15~
0.18%, Ni 35~37%, surplus Fe；
S2, by melting ingot casting through electroslag remelting；
S3, resmelting ingot are prepared as slab, the slab thickness is 140~180mm through high temperature forging；
S4, steel slab surface are after reconditioning, and multistage hot deformation is at the plate with a thickness of 9~10mm, the warm on strip rolling mill
Breaking down temperature is 1050~1100 DEG C when rolling, and finishing temperature is 820~850 DEG C, and the reduction ratio rolled per pass is 5~8%.
2. the manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion according to claim 1, which is characterized in that
Make P≤0.002% in ingot, S≤0.002%, O≤0.0015%, N≤0.0015% when the electroslag remelting.
3. the manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion according to claim 1, which is characterized in that
The breaking down temperature is 1050~1060 DEG C, and finishing temperature is 840~850 DEG C.
4. the manufacturing method of the Fe-36Ni invar alloy plate of low thermal expansion according to claim 1, which is characterized in that
The reduction ratio rolled per pass is 7~8%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842527A (en) * | 2020-06-24 | 2020-10-30 | 江苏圣珀新材料科技有限公司 | Cold rolling process for LNG liquefied injection ship plate 4J36 |
| CN114226662A (en) * | 2021-12-13 | 2022-03-25 | 清华大学 | Method for preparing low-thermal-expansion invar alloy by annealing |
| CN114410977A (en) * | 2021-12-27 | 2022-04-29 | 河钢股份有限公司 | Preparation method of large-size high-strength invar forging |
| CN115976395A (en) * | 2022-12-28 | 2023-04-18 | 北冶功能材料(江苏)有限公司 | Preparation method of invar alloy for metal mask |
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| JPH10195531A (en) * | 1997-01-10 | 1998-07-28 | Nkk Corp | Production of invar alloy excellent in strength and toughness |
| CN1742107A (en) * | 2002-12-20 | 2006-03-01 | 伊菲合金公司 | Iron-nickel alloy with low coefficient of thermal expansion for making shade masks |
| CN101168818A (en) * | 2006-10-23 | 2008-04-30 | 宝山钢铁股份有限公司 | Fe-36Ni based alloy wire and manufacturing method thereof |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10195531A (en) * | 1997-01-10 | 1998-07-28 | Nkk Corp | Production of invar alloy excellent in strength and toughness |
| CN1742107A (en) * | 2002-12-20 | 2006-03-01 | 伊菲合金公司 | Iron-nickel alloy with low coefficient of thermal expansion for making shade masks |
| CN101168818A (en) * | 2006-10-23 | 2008-04-30 | 宝山钢铁股份有限公司 | Fe-36Ni based alloy wire and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842527A (en) * | 2020-06-24 | 2020-10-30 | 江苏圣珀新材料科技有限公司 | Cold rolling process for LNG liquefied injection ship plate 4J36 |
| CN114226662A (en) * | 2021-12-13 | 2022-03-25 | 清华大学 | Method for preparing low-thermal-expansion invar alloy by annealing |
| CN114410977A (en) * | 2021-12-27 | 2022-04-29 | 河钢股份有限公司 | Preparation method of large-size high-strength invar forging |
| CN115976395A (en) * | 2022-12-28 | 2023-04-18 | 北冶功能材料(江苏)有限公司 | Preparation method of invar alloy for metal mask |
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Effective date of registration: 20230801 Address after: No. 388 Yuxi East Road, Qiandeng Town, Kunshan City, Suzhou City, Jiangsu Province, 215300 Patentee after: KUNSHAN SPECTRUM ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 215500 Changshou City South Three Ring Road No. 99, Suzhou, Jiangsu Patentee before: CHANGSHU INSTITUTE OF TECHNOLOGY |