CN112779462A - FeNiMnCr series high-expansion alloy with low Ni content, strip and application - Google Patents
FeNiMnCr series high-expansion alloy with low Ni content, strip and application Download PDFInfo
- Publication number
- CN112779462A CN112779462A CN202010019697.2A CN202010019697A CN112779462A CN 112779462 A CN112779462 A CN 112779462A CN 202010019697 A CN202010019697 A CN 202010019697A CN 112779462 A CN112779462 A CN 112779462A
- Authority
- CN
- China
- Prior art keywords
- content
- alloy
- low
- fenimncr
- expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
- G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
- G01K5/62—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being formed of compounded strips or plates, e.g. bimetallic strip
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a FeNiMnCr series high-expansion alloy with low Ni content, which comprises the following components in percentage by mass: 0.15-0.60% of C, 0.1-0.5% of Si, Mn: 3.5-6.0, Cr: 4.0-6.0, P is less than or equal to 0.008, S is less than or equal to 0.005, Ni: 14.0 to 18.0, the balance being Fe and unavoidable impurities, Ni + Mn + Cr: 23.0-27.0. The invention also provides a strip rolled by the alloy and application of the cold-rolled strip in the aspect of bimetal active layers. Compared with the existing similar alloy, the alloy has high expansion coefficient, less noble metal Ni element and lower cost.
Description
Technical Field
The invention belongs to the field of high-expansion alloys, and relates to a high-expansion alloy with low nickel element content.
Background
The high expansion alloy is an alloy with high expansion coefficient, and the expansion coefficient of the high expansion alloy is higher than that of common metal, the expansion coefficient is generally more than or equal to 15 multiplied by 10 < -6 >/DEG C at the temperature of 20-100 ℃, and the expansion coefficient is generally more than or equal to 17 multiplied by 10 < -6 >/DEG C at the temperature of 20-200 ℃. Mainly including FeNiMn series, FeNiCr series, and MnNiCu series. Because of high expansion coefficient, the alloy can be compounded with low expansion alloy and then used as bimetal, the high expansion alloy is used as an active layer, and the low expansion alloy is used as a passive layer; when the bimetal strip is heated, because the thermal expansion coefficients of the two layers are different, the elongation of the active layer is far greater than that of the passive layer, and the metal bends towards the passive layer. Generally, the difference between the expansion coefficients of the active layer and the passive layer is directly related to the sensitivity of the device, and when the expansion coefficient of the passive layer is constant, it is desirable that the higher the expansion coefficient of the active layer is, the better the expansion coefficient is, and that the structure stability is good, and that no phase change occurs during operation. The most common high expansion alloys mainly comprise Ni22Cr3, Ni19Cr11 and the like, the chemical compositions specified in the national standard GB/T4461 are shown in Table 1, and the expansion coefficients of the alloy at room temperature of 100 ℃ to 200 ℃ are shown in Table 2.
TABLE 1 chemical composition in wt% of the relevant typical steel grades
| Number plate | C | S | P | Si | Cr | Mn | Ni | Fe |
| Ni20Mn6 | ≤0.05 | ≤0.02 | ≤0.02 | 0.15～0.30 | / | 5.5-6.5 | 19.0～21.0 | Surplus |
| Ni22Cr3 | 0.25-0.35 | ≤0.02 | ≤0.02 | 0.15～0.30 | 2.0-4.0 | 0.3-0.6 | 21.0～23.0 | Surplus |
TABLE 2 expansion behaviour of typical steels of interest
According to the countryThe data in GB/T4461 shows that the content of nickel in two typical high-expansion alloys is more than 19%, and the expansion coefficients of Ni20Mn6 and Ni22Cr3 at room temperature to 100 ℃ are more than or equal to 16 multiplied by 10-6The expansion coefficient of Ni20Mn6 is slightly higher than that of Ni22Cr3 at/° C.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a high-expansion alloy having a low nickel content and a high expansion coefficient. Also provides the application of the alloy.
The invention has the technical scheme that the FeNiMnCr series high-expansion alloy with low Ni content comprises the following components in percentage by mass: 0.15-0.60% of C, 0.1-0.5% of Si, Mn: 3.5-6.0, Cr: 4.0-6.0, P is less than or equal to 0.008, S is less than or equal to 0.005, Ni: 14.0 to 18.0, the balance being Fe and unavoidable impurities, Ni + Mn + Cr: 23.0-27.0.
According to the FeNiMnCr-based high expansion alloy with a low Ni content of the present invention, it is preferable that the Ni content is 14.5 to 17.0%.
Preferably, the Cr content is 4.1 to 6.0%.
More preferably, the Cr content is 4.5 to 6.0%.
According to the FeNiMnCr high expansion alloy with low Ni content, the linear expansion coefficient of the high expansion alloy is preferably more than 19.0 x 10 in the range of room temperature to 100 DEG C-6A linear expansion coefficient of more than 20 x 10 at room temperature-200 deg.C-6/℃。
The invention also provides a strip obtained by hot rolling and cold rolling the FeNiMnCr series high expansion alloy with low Ni content.
The invention also provides application of the strip obtained by cold rolling the FeNiMnCr series high expansion alloy with low Ni content in a bimetal active layer.
The main idea of the invention in component design is to reduce the content of Ni by increasing the content of Mn and Cr, and properly adjust the content of C, so that the alloy has higher expansion performance and good structure stability. Mn and Cr are expansion performance improving elements, the increase of the content of the Mn and Cr is beneficial to improving the linear expansion coefficient of the alloy, and the alloy has high expansion performance through the balance of Ni, Mn and Cr elements; meanwhile, the content of C is properly increased, the austenite elements are expanded through Mn, C and Ni, the stability of the austenite structure of the alloy is ensured, and the good processing performance of the alloy is ensured by reducing the contents of P and S elements.
The design of the alloy composition of the present invention is illustrated below:
ni is a basic element of the alloy, is a basic element for realizing high expansion performance, can increase the linear expansion coefficient of the alloy by reducing the Ni content in a certain range, is also a main component element of austenite, has an important effect on the structure stability, and is a main element influencing the mechanical performance of the alloy at low temperature. The invention controls the Ni content at 14.0-18.0% to ensure the alloy has high expansion performance and stable structure.
Mn: the Mn-free high-expansion-coefficient alloy is a key element for realizing high expansion coefficient, improves the linear expansion coefficient by increasing the content of Mn, is an austenite forming element at the same time, can ensure that the alloy does not have martensite phase transformation at low temperature by controlling the Mn-free high-expansion-coefficient alloy in a certain range, and ensures the stability of the austenite structure of the alloy. Therefore, it is important to control Mn within a certain range, and it is necessary to control Mn within a range of 3.5 to 6.0% in order to achieve the technical effects of the present invention.
The addition of the element can help the linear expansion coefficient of the alloy to be linearly improved and realize high expansion performance, but the excessive addition of the element Cr can reduce the austenite phase region, so that the Cr content needs to be controlled within a certain range, and the Cr content is controlled to be within the range of Cr: 4.0 to 6.0 percent.
Ni + Mn + Cr: when the contents of the three elements of Ni, Mn and Cr are respectively controlled, in order to ensure the high expansion performance of the alloy and simultaneously have good structure stability, the specific gravity of the elements of Ni, Mn and Cr is required to be simultaneously controlled within the range of 23.0-27.0%, and beyond the range, the high expansion performance and the structure stability cannot be simultaneously obtained.
C: the C content is controlled within a range of 0.15-0.60%.
Si is an effective deoxidizer and can reduce the oxygen content of the alloy, thereby improving the thermoplasticity of the alloy and improving the hot-working performance. Although silicon remains in the smelting process, too high silicon content causes reduction in plasticity and toughness, which makes processing difficult, and therefore, it is important to select the content appropriately. The invention controls Si in the range of 0.1-0.5%.
S: the S and the Fe can form low-melting-point FeS and are partially aggregated in a grain boundary, so that grain boundary catalysis is caused, micro cracks are generated, and the welding performance and the hot-working performance of the material are influenced, therefore, the lower the S content is, the better the S content is, and the S content is controlled to be less than or equal to 0.005 percent.
P is a harmful impurity element in the alloy, and P can be segregated in a grain boundary and easily forms grain boundary microcracks under the action of thermal stress to cause the generation of thermal cracks, so that the lower the content of P is, the better the content of P is, but the lower the content of P is, the higher the manufacturing cost is caused, and the content of P is controlled to be less than or equal to 0.008 percent.
The invention has the starting point that the components of the nickel with the content of the noble metal are reduced, the expansion coefficient of the alloy is ensured to be higher than the level of the existing typical alloy through reasonable component design, and the alloy has good structural stability.
Compared with the existing alloy, the invention has the following beneficial effects:
through reasonable component design, the FeNiMnCr high-expansion alloy with low Ni is invented, has high linear expansion coefficient, and the temperature of 20-100 ℃ is more than or equal to 19.0 multiplied by 10-6The expansion coefficient of the material is more than or equal to 20.0 multiplied by 10 at the temperature of 20-200 DEG C-6Compared with the prior alloy, the expansion performance is higher than that of Ni22Cr3 and is equivalent to that of the prior alloy Ni20Mn 6. The addition of Ni element is reduced, the addition of Mn and Cr elements is increased, the stability of the alloy is ensured by controlling the content of the three elements, the alloy does not generate martensite transformation at the low temperature of-100 ℃, and the alloy has good structure stability. The yield strength is more than or equal to 180MPa, the tensile strength is more than or equal to 470MPa, and the elongation after fracture is more than or equal to 45 percent. Meanwhile, the manufacturing cost can be reduced, and the Ni content can be saved.The alloy can be used to fabricate a thermal bimetallic active layer.
Detailed Description
According to the chemical component requirements of the steel grade, a steel ingot is smelted by a vacuum induction furnace, No. 1-5 is an embodiment, and the steel ingot is processed into a required sample to test the performance by forging, hot rolling, cold rolling and heat treatment; 6-9 are comparative examples, wherein 6-7 are Ni22Cr3 alloy, 8-9 are Ni20Mn6 alloy, the processing procedure is similar to the working example, and the working example is also processed by smelting, hot rolling, cold rolling and heat treatment, the chemical compositions of the working example and the comparative example are shown in Table 3, and the expansion performance and the mechanical property are compared in Table 4.
TABLE 3 chemical composition (wt%) of examples and comparative examples
TABLE 4 Properties of examples and comparative examples
As shown by comparing the components and the expansion performance of the examples and the comparative examples in tables 3 and 4, the contents of noble elements, namely nickel, are reduced, the mechanical property is excellent, the structure is stable, the expansion coefficient is higher than that of the comparative examples, the good implementation effect is achieved, and the cost can be effectively reduced.
The strip obtained by cold rolling the FeNiMnCr series high expansion alloy with low Ni content can be used as a bimetal active layer. Because of high expansion coefficient, the alloy can be compounded with low expansion alloy and then used as bimetal, the high expansion alloy is used as an active layer, and the low expansion alloy is used as a passive layer; when the bimetal strip is heated, because the thermal expansion coefficients of the two layers are different, the elongation of the active layer is far greater than that of the passive layer, and the metal bends towards the passive layer.
Claims (7)
1. A FeNiMnCr series high expansion alloy with low Ni content is characterized in that: the high-expansion alloy comprises the following components in percentage by mass: 0.15-0.60% of C, 0.1-0.5% of Si, Mn: 3.5-6.0, Cr: 4.0-6.0, P is less than or equal to 0.008, S is less than or equal to 0.005, Ni: 14.0 to 18.0, the balance being Fe and unavoidable impurities, Ni + Mn + Cr: 23.0-27.0.
2. A low Ni content FeNiMnCr based high expansion alloy according to claim 1 wherein: the Ni content is 14.5-17.0%.
3. A low Ni content FeNiMnCr based high expansion alloy according to claim 1 wherein: the Cr content is 4.1-6.0%.
4. A low Ni content FeNiMnCr based high expansion alloy according to claim 3 wherein: the Cr content is 4.5-6.0%.
5. A low Ni content FeNiMnCr based high expansion alloy according to claim 1 wherein: the coefficient of linear expansion of the high-expansion alloy is more than 19.0 multiplied by 10 between room temperature and 100 DEG C-6A linear expansion coefficient of more than 20 x 10 at room temperature-200 deg.C-6/℃。
6. A strip obtained by hot rolling and cold rolling a FeNiMnCr-based high expansion alloy having a low Ni content according to claim 1.
7. The use of a strip cold rolled from a FeNiMnCr high expansion alloy of low Ni content as claimed in claim 6 in bimetallic active layers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911072672 | 2019-11-05 | ||
| CN2019110726722 | 2019-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112779462A true CN112779462A (en) | 2021-05-11 |
Family
ID=75749968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010019697.2A Pending CN112779462A (en) | 2019-11-05 | 2020-01-08 | FeNiMnCr series high-expansion alloy with low Ni content, strip and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112779462A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889245A (en) * | 2022-04-16 | 2022-08-12 | 上海殷菲合金材料有限公司 | Composite metal sheet and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3625663A (en) * | 1969-01-21 | 1971-12-07 | Driver Co Wilbur B | Thermostatic bimetal and high expanding alloy |
| US4585707A (en) * | 1983-04-29 | 1986-04-29 | Carpenter Technology Corporation | High expansion alloy for bimetal strip |
| JPH0693381A (en) * | 1991-11-15 | 1994-04-05 | Nisshin Steel Co Ltd | High expansion alloy for bimetal |
| CN102458831A (en) * | 2009-06-11 | 2012-05-16 | 株式会社新王材料 | Bimetal for high temperature |
-
2020
- 2020-01-08 CN CN202010019697.2A patent/CN112779462A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3625663A (en) * | 1969-01-21 | 1971-12-07 | Driver Co Wilbur B | Thermostatic bimetal and high expanding alloy |
| US4585707A (en) * | 1983-04-29 | 1986-04-29 | Carpenter Technology Corporation | High expansion alloy for bimetal strip |
| JPH0693381A (en) * | 1991-11-15 | 1994-04-05 | Nisshin Steel Co Ltd | High expansion alloy for bimetal |
| CN102458831A (en) * | 2009-06-11 | 2012-05-16 | 株式会社新王材料 | Bimetal for high temperature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889245A (en) * | 2022-04-16 | 2022-08-12 | 上海殷菲合金材料有限公司 | Composite metal sheet and preparation method and application thereof |
| CN114889245B (en) * | 2022-04-16 | 2024-05-28 | 上海殷菲合金材料有限公司 | Composite metal sheet and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102409257A (en) | Austenite-series heat-resistant steel and manufacturing method thereof | |
| JP4816642B2 (en) | Low alloy steel | |
| CN104451421B (en) | High-strength high-toughness bimetallic strip saw blade back steel and preparation method thereof | |
| CN109355581A (en) | A kind of turbine blade and bolt heat resisting steel | |
| JPH09165655A (en) | Austenitic stainless steel for high temperature apparatus and is production | |
| CN109609860B (en) | Elastic alloy with high mechanical quality factor and manufacturing method thereof | |
| CN105200346A (en) | 12Cr13 bar used for evaporator pull rods and pull rod nuts | |
| JP3508667B2 (en) | High Cr ferritic heat resistant steel excellent in high temperature strength and method for producing the same | |
| CN112779462A (en) | FeNiMnCr series high-expansion alloy with low Ni content, strip and application | |
| JP5100144B2 (en) | Steel plate for spring, spring material using the same, and manufacturing method thereof | |
| CN101294258B (en) | Low-chromium high purity ferritic stainless steel and method for manufacturing same | |
| JP4710488B2 (en) | Method for producing 9% Ni steel with excellent low temperature toughness | |
| CN1100160C (en) | High-strength alloy with constant elasticity at high temp and its preparing process | |
| RU2507289C1 (en) | Titanium-based alloy and item made from it | |
| JP6296435B2 (en) | Manufacturing method of heat-resistant austenitic stainless steel for metal gasket | |
| JPH1192881A (en) | Ferritic heat resistant steel having lath martensitic structure and its production | |
| CN104388823A (en) | High-strength heat-resistant alloy steel | |
| JP2016065265A (en) | Heat resistant steel for steam turbine rotor blade and steam turbine rotor blade | |
| CN106435129B (en) | Ferritic stainless steel with good toughness and corrosion resistance and manufacturing method thereof | |
| KR20180018908A (en) | Duplex stainless steel having low content of ni and method of manufacturing the same | |
| CN106609336A (en) | Acid-resistant stainless steel and production method thereof | |
| CN106567010A (en) | Corrosion-resistant stainless steel and production method thereof | |
| CN106567009A (en) | High-temperature-resistant corrosion-resistant stainless steel and production method thereof | |
| JP2002241903A (en) | HIGH Cr FERRITIC HEAT RESISTANT STEEL | |
| JP6146780B2 (en) | High strength austenitic steel with excellent hydrogen embrittlement resistance and method for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210511 |
|
| RJ01 | Rejection of invention patent application after publication |