CN114752846A - High-strength invar alloy wire and preparation method thereof - Google Patents
High-strength invar alloy wire and preparation method thereof Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 95
- 239000000956 alloy Substances 0.000 title claims abstract description 95
- 229910001374 Invar Inorganic materials 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 23
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 230000032683 aging Effects 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000005482 strain hardening Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000009749 continuous casting Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 abstract description 27
- 230000008569 process Effects 0.000 abstract description 17
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 238000001556 precipitation Methods 0.000 abstract description 9
- 238000010622 cold drawing Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- -1 (AL Inorganic materials 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention discloses a high-strength invar alloy wire and a preparation method thereof, which relate to alloy components and improve the strength of the alloy by adding elements such as C, Cr, V and the like, wherein the content of each element meets the following formula: c% + 0.05 Cr% + 0.2V%, V/Cr 0.6 ≤ 1.8, apply certain heat treatment process and cold drawing process, rely on precipitation strengthening and deformation strengthening synergistic effect, make the alloy wire rod reach the low expansibility of high strength, its performance index can reach: the tensile strength is not less than 1350MPa, and the linear expansion is between 20 and 230 DEG CCoefficient is less than or equal to 3.0 multiplied by 10‑6The linear expansion coefficient of the material is less than or equal to 10 multiplied by 10 at the temperature of 230-290 DEG C‑6The temperature per DEG C can completely replace the wire for the low-slack transmission wire which is industrially applied at present.
Description
Technical Field
The invention relates to the field of invar alloy in the metallurgical industry, in particular to a high-strength invar alloy wire and a preparation method thereof.
Background
In recent years, structural materials having a small linear expansion coefficient and high strength have been attracting attention. There are three current approaches to making such materials: one method is to add Be, Ti, Al and the like on the basis of the common Fe-Ni invar alloy by separating out Ni 3Be and Ni3Strengthening mechanism of intermetallic compound such as (AL, Ti)The method has the advantages of good strengthening effect, tensile strength of more than 1500MPa, and high expansion coefficient of the alloy at 20-100 ℃ of 3.5-4 multiplied by 10-6/° c; the second method is based on the common Fe-Ni invar alloy, the purpose of improving the alloy strength is achieved by adding C and carbide forming elements and precipitating carbide, at present, the tensile strength of the alloy can reach more than 1300MPa by simultaneously adding a plurality of carbide forming elements such as Cr, Mo, V, W and the like, but the addition of a plurality of alloy elements is accompanied with the increase of expansion coefficient; the third method is to produce a large amount of dislocation and substructure in the alloy by deformation strengthening and cold deformation, thereby not only improving the strength of the alloy, but also reducing the expansion coefficient of the alloy; however, the three methods described above are difficult to achieve the desired purpose by only one of the reinforcement methods.
Similar research is available in the prior art, for example, application No. 200510029930.0 discloses a method for producing a high-strength invar alloy and an alloy wire thereof, wherein C, W, V, Co elements (see Table 1) are added to form W, V dispersion-type carbide, so that the tensile strength of the wire is not less than 1300MPa, and the low expansion characteristic (alpha is not more than 2.5 multiplied by 10 at 20-240 ℃) of the conventional Fe-36Ni invar alloy is maintained -6/° c; alpha is less than or equal to 4.5 multiplied by 10 at the temperature of 20-290 DEG C-6/° c), but the W content in the alloy is high, and the hot workability is poor; for example, in Japanese patent JP2003082439(A), Mo and V dispersion type carbide is formed by adding C, Mo and V elements (see Table 1), so that the tensile strength of the alloy wire is not less than 1300 MPa; the average linear thermal expansion coefficient alpha of the alloy at 20-230 ℃ is less than or equal to 3.7 multiplied by 10-6/° C, and the average linear thermal expansion coefficient alpha of 230-290 ℃ is less than or equal to 10.8 multiplied by 10-6However, this method has a higher expansion coefficient of the alloy due to the addition of Mo or V.
TABLE 1 composition and content (wt%) of invar alloy in prior art
In view of the above, it is still an urgent problem to develop a structural material with small linear expansion coefficient and high strength based on Fe-36Ni invar alloy.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-strength invar alloy wire and a preparation method thereof, on the basis of the chemical components of Fe-36Ni invar alloy, C, Cr, V and other elements are added, uniform, fine and dispersed carbides are precipitated in a matrix through a heat treatment process to achieve the purpose of strengthening, then the strength of the wire is further improved through cold drawing deformation and depending on deformation strengthening, and the expansion coefficient is reduced while the high strength is obtained by adopting the dual functions of carbide strengthening and deformation strengthening.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a high-strength invar alloy wire which comprises the following components in percentage by mass, 0.20-0.45% of C, less than or equal to 0.60% of Si, and Mn: 0.20-0.60%, P is less than or equal to 0.02%, S is less than or equal to 0.02%, Ni: 33-40%, Cr: 0.5-1.6%, V: 0.5-1.5%, Co is less than or equal to 5.0%, and the balance is iron and inevitable impurities.
Preferably, C is 0.23-0.38%, Ni: 33-38%, Cr: 0.6-1.6%, V: 1.0-1.5%, Co is less than or equal to 3.0%, and the total amount of inevitable impurities is less than 0.05 wt%.
Preferably, the components in the high-strength invar alloy wire rod satisfy the following formula:
c% + 0.05 Cr% + 0.2V%; and/or
0.6≤V/Cr≤1.8。
Preferably, in the high-strength invar alloy wire, the content of Co% + Ni% is 35-38%.
Preferably, the tensile strength of the high-strength invar alloy wire is more than or equal to 1350MPa, and the coefficient of linear expansion at 20-230 ℃ is less than or equal to 3.0 multiplied by 10-6The linear expansion coefficient of the material is less than or equal to 10 multiplied by 10 at the temperature of 230-290 DEG C-6/℃。
According to the component proportion of the raw materials in the first aspect of the invention, the raw materials are prepared into a steel ingot or a continuous casting blank, the steel ingot or the continuous casting blank is hot-rolled into a wire rod, and the wire rod is prepared through solution heat treatment, aging heat treatment and cold working in sequence.
Preferably, in the solution heat treatment process, the solution heat treatment temperature is 1000-1150 ℃.
Preferably, in the aging heat treatment process, the temperature of the aging heat treatment is 550-780 ℃.
Preferably, the deformation is controlled to be more than or equal to 70% in the cold working process.
Preferably, the tensile strength of the high-strength invar alloy wire is more than or equal to 1350MPa, and the linear expansion coefficient of the high-strength invar alloy wire is less than or equal to 3.0 multiplied by 10 at the temperature of 20-230 DEG C-6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6/℃。
The principle of the component design of the high-strength invar alloy wire rod is as follows:
(1) the alloy of the invention has the characteristics of component design: the invention improves the strength of the alloy by adding elements such as C, Cr, V and the like on the basis of Fe-Ni36 invar alloy. In order to exert the strengthening effect to the maximum extent, the adding amount of alloy elements is controlled according to the proportion of 0.05Cr + 0.2V% of C%, and simultaneously the V/Cr ratio is more than or equal to 0.6 and less than or equal to 1.8, then a certain heat treatment process and a cold drawing process are applied, and the alloy wire rod achieves high strength and low expansion performance by virtue of the synergistic effect of precipitation strengthening and deformation strengthening, and the performance index can reach: the tensile strength is more than or equal to 1350MPa, and the coefficient of linear expansion at 20-230 ℃ is less than or equal to 3.0 multiplied by 10-6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C -6The temperature per DEG C can completely replace the wire for the low-relaxation transmission wire in the current industrial application;
(2) the reasons for the selection range of each component are as follows:
c: elements necessary for carbide precipitation strengthening; the content of C is low, the number of precipitated carbides is small, and an ideal strengthening effect cannot be achieved; too high a carbon content increases the expansion coefficient. Therefore, in order to control the effective carbon content in the alloy, the addition amount of C in the alloy is 0.23-0.38 wt%, and is preferably controlled according to the following formula: c% + 0.05 Cr% + 0.2V%.
Si: not only has the function of deoxidation, but also can improve the strength of the matrix, but the addition of a large amount of Si can increase the expansion coefficient, so that the content of Si is limited to be less than or equal to 0.60 wt%.
Mn: is not only a deoxidizing element but also an enhancing element; mn can increase the strength of the alloy and simultaneously increase the expansion coefficient of the alloy, and the Mn content is too low, so that the alloy has poor deoxidation effect; therefore, the Mn content is controlled to be 0.20 to 0.60%.
Ni: ni is a main element for realizing low expansion characteristic, when the Ni content in the common Fe-Ni invar alloy is about 36 percent, the expansion coefficient is the lowest, and deviates from a certain range, the expansion coefficient of the alloy can be rapidly increased; when a certain amount of alloying elements is added to the alloy, the Ni content in the alloy is increased appropriately to obtain a lower expansion coefficient. According to the invention, Ni and Co are added simultaneously, and the Ni and Co contents of the alloy are controlled within a certain range, so that the alloy can be ensured to have a low expansion coefficient. Therefore, the Ni content is controlled to be 33-38%.
Co: the composite material has the similar effect with Ni, the linear expansion coefficient can be reduced by combining Co and Ni, the content of Ni can be correspondingly reduced by adding Co, and the proper amount of Co is favorable for reducing the expansion coefficient of the alloy, but the Co is easier to have martensite phase change in cold machining compared with Ni, so the content of Co is limited to be less than 3.0 percent, when Co and Ni are compositely added, Ni is more than or equal to 33 percent, Co is less than or equal to 3 percent, and Co plus Ni is 35 to 38 percent in a preferable scheme.
Cr: cr is a carbide forming element with medium strength, can effectively improve the alloy strength, and has low Cr content and unobvious strengthening effect; if the content of Cr is too high, coarse carbides are easily formed, and the alloy performance is deteriorated; therefore, the Cr content of the invention is controlled within the range of 0.6-1.6%.
V: vanadium is a strong carbide forming element, carbide formed by V and C is low in precipitation, aggregation and growth speed, carbide particles tend to be distributed in a fine and dispersed mode, precipitation strengthening and grain refining effects are stronger, and the strength and plasticity of the alloy can be greatly improved; the content of V is controlled to be 1.0-1.5%; in a preferred embodiment of the invention, the amount of V and Cr added is controlled in accordance with V/Cr of 0.6. ltoreq. V/Cr. ltoreq.1.8.
P: the element is harmful to toughness, and a compound with a low melting point P can be segregated in a grain boundary, so that the brittleness of the grain boundary is increased, and microcracks can be formed under the action of thermal stress; therefore, the content of P should be controlled as low as possible, and the P content is controlled to be less than or equal to 0.020% in the invention.
S: is a harmful impurity element and can reduce the plasticity and toughness of the alloy. S and Mn can form low-melting-point MnS which is localized at grain boundaries, so that the grain boundaries are embrittled, and intergranular cracks are formed under the action of stress. Therefore, it is desirable that the lower the S content in the alloy, the better, the present invention controls S.ltoreq.0.020%.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the high-strength invar alloy wire and the preparation method thereof, on the basis of the chemical components of the Fe-36Ni invar alloy, C, Cr, V and other elements are added, uniform, fine and dispersed carbides are precipitated in a matrix through a heat treatment process to achieve the purpose of strengthening, then the strength of the wire is further improved through a cold drawing process and by means of deformation strengthening, and the expansion coefficient is reduced while the high strength is obtained by adopting the dual functions of carbide strengthening and deformation strengthening;
2. according to the high-strength invar alloy wire and the preparation method thereof, the strength of the alloy is improved by adding elements such as C, Cr, V and the like; in order to exert the strengthening effect to the maximum extent, the adding amount of alloy elements is controlled according to the proportion of 0.05Cr + 0.2V% of C%, and simultaneously the V/Cr ratio is more than or equal to 0.6 and less than or equal to 1.8, then a certain heat treatment process and a cold drawing process are applied, and the alloy wire rod achieves high strength and low expansion performance by virtue of the synergistic effect of precipitation strengthening and deformation strengthening, and the performance index can reach: the tensile strength is more than or equal to 1350MPa, and the linear expansion coefficient is less than or equal to 3.0 multiplied by 10 at the temperature of 20-230 DEG C -6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6The temperature per DEG C can completely replace the wire for the low-slack transmission wire which is industrially applied at present.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner.
The high-strength invar alloy wire rod provided by the invention comprises the following components in percentage by mass, 0.20-0.45% of C, less than or equal to 0.60% of Si, Mn: 0.20-0.60%, P is less than or equal to 0.02%, S is less than or equal to 0.02%, Ni: 33-40%, Cr: 0.5-1.6%, V: 0.5-1.5%, Co is less than or equal to 5.0%, and the balance is iron and inevitable impurities; in a further preferred scheme, the high-strength invar alloy wire rod comprises the following components in percentage by mass, 0.23-0.38% of C, less than or equal to 0.60% of Si, and Mn: 0.20-0.60%, P is less than or equal to 0.02%, S is less than or equal to 0.02%, Ni: 33-38%, Cr: 0.6-1.6%, V: 1.0-1.5%, Co is less than or equal to 3.0%, and the balance of iron and inevitable impurities, wherein the total amount of the inevitable impurities is less than 0.05 wt%, and on the basis, the components satisfy the following formula: c% + 0.05 Cr% + 0.2V%; and/or V/Cr is more than or equal to 0.6 and less than or equal to 1.8. In addition, the content of Co% + Ni% in the high-strength invar alloy wire is 35-38%.
The tensile strength of the high-strength invar alloy wire is more than or equal to 1350MPa, and the linear expansion coefficient of the high-strength invar alloy wire is less than or equal to 3.0 multiplied by 10 at the temperature of 20-230 DEG C-6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6/℃。
The preparation method of the high-strength invar alloy wire rod is prepared by the following steps: firstly, obtaining raw materials according to the component proportion of the high-strength invar alloy wire rod, then preparing the raw materials into a steel ingot or a continuous casting blank by adopting a conventional process, then rolling the steel ingot or the continuous casting blank into a support wire rod by hot rolling, carrying out solution heat treatment on the hot rolled plate at 1000-1150 ℃, carrying out aging heat treatment at 550-780 ℃, and then carrying out cold machining with the deformation amount of more than or equal to 70% to finally obtain the invar alloy wire rod with high strength and low expansion coefficient.
The solution heat treatment of the hot-rolled wire rod at 1000-1150 ℃ is to fully dissolve carbides in the alloy, so that preparation is made for subsequent aging heat treatment, uniform dispersion and precipitation of the carbides are guaranteed, and the alloy is favorable for work hardening. The aging heat treatment is carried out within the range of 550-780 ℃ in order to ensure that the carbide is uniformly precipitated in the matrix, and the strength of the alloy is improved through uniform dispersion precipitation of the carbide. The subsequent cold working is performed for further strain strengthening, and the cold working deformation is controlled to be more than or equal to 70%, so that the high-strength low-expansion alloy wire rod with the tensile strength of more than 1350MPa can be obtained.
The high strength invar alloy wire of the present invention and the method for manufacturing the same will be further described with reference to specific examples;
examples 1 to 5
Examples 1 to 5 the raw materials were mixed according to the component contents of the high strength invar alloy wire, and then the high strength invar alloy wire was prepared according to the above method, and the process parameters in the preparation process were controlled as shown in table 2;
TABLE 2 Process parameters in the preparation of examples 1 to 5
The measured components of the high strength invar alloy wire rods prepared in examples 1 to 5 are shown in table 3, and the properties thereof are shown in table 4;
TABLE 3 ingredients and contents (wt%) of high strength invar alloy wire rods prepared in examples 1 to 5
TABLE 4 Properties of high Strength Invar alloy wire rods prepared in examples 1-5
It is clear from the combination of examples 1 to 5 and Table 4 that the strength of the alloy is improved by adding elements such as C, Cr, and V; in order to exert the strengthening effect to the maximum extent, the adding amount of the alloy elements is controlled according to the proportion of 0.05 Cr% + 0.2V% of C%, and V/Cr is more than or equal to 0.6 and less than or equal to 1.8 at the same time, and then certain heat treatment is carried outThe process and the cold drawing process rely on the synergistic effect of precipitation strengthening and deformation strengthening to ensure that the alloy wire rod achieves high-strength low-expansion performance, and the performance indexes can reach: the tensile strength is more than or equal to 1350MPa, and the linear expansion coefficient is less than or equal to 3.0 multiplied by 10 at the temperature of 20-230 DEG C -6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6The temperature per DEG C can completely replace the wire for the low-slack transmission wire which is industrially applied at present.
Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The high-strength invar alloy wire is characterized by comprising the following components in percentage by mass, 0.20-0.45% of C, less than or equal to 0.60% of Si, Mn: 0.20-0.60%, P is less than or equal to 0.02%, S is less than or equal to 0.02%, Ni: 33-40%, Cr: 0.5-1.6%, V: 0.5-1.5%, Co is less than or equal to 5.0%, and the balance is iron and inevitable impurities.
2. The high-strength invar alloy wire rod according to claim 1, wherein C is 0.23 to 0.38%, Ni: 33-38%, Cr: 0.6-1.6%, V: 1.0-1.5%, Co is less than or equal to 3.0%, and the total amount of inevitable impurities is less than 0.05 wt%.
3. The high strength invar alloy wire of claim 2, wherein the components in the high strength invar alloy wire satisfy the following formula:
C% + 0.05 Cr% + 0.2V%; and/or
0.6≤V/Cr≤1.8。
4. The high strength invar alloy wire of claim 3, wherein a content of Co% + Ni% in the high strength invar alloy wire is 35 to 38%.
5. The high strength invar alloy wire according to any one of claims 1 to 4, wherein the high strength invar alloy wire has a tensile strength of 1350MPa or more and a linear expansion coefficient of 3.0 x 10 or less at 20 to 230 ℃-6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6/℃。
6. A preparation method of a high-strength invar alloy wire rod is characterized in that the high-strength invar alloy wire rod is prepared by preparing raw materials according to the component proportion of any one of claims 1 to 4 into a steel ingot or a continuous casting blank, then hot rolling the steel ingot or the continuous casting blank into a wire rod, and sequentially carrying out solution heat treatment, aging heat treatment and cold working on the wire rod.
7. The method according to claim 6, wherein a temperature of the solution heat treatment is 1000 to 1150 ℃ in the solution heat treatment.
8. The preparation method according to claim 6, wherein the aging heat treatment temperature is 550 to 780 ℃ during the aging heat treatment.
9. The method of claim 6, wherein the controlled amount of deformation during cold working is at least 70%.
10. The method according to claim 6, wherein the high-strength invar alloy wire has a tensile strength of 1350MPa or more and a linear expansion coefficient of 3.0 x 10 or less at 20 to 230 ℃-6Per DEG C, linear expansion coefficient of not more than 10 x 10 at 230-290 DEG C-6/℃。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256395A (en) * | 2001-03-02 | 2002-09-11 | Sanyo Special Steel Co Ltd | High strength and low thermal expansion alloy having excellent twisting and alloy wire thereof |
| CN105506474A (en) * | 2016-01-11 | 2016-04-20 | 河北钢铁股份有限公司 | Carbide-enhanced type invar alloy wire and preparing method thereof |
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2021
- 2021-01-08 CN CN202110021134.1A patent/CN114752846A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256395A (en) * | 2001-03-02 | 2002-09-11 | Sanyo Special Steel Co Ltd | High strength and low thermal expansion alloy having excellent twisting and alloy wire thereof |
| CN105506474A (en) * | 2016-01-11 | 2016-04-20 | 河北钢铁股份有限公司 | Carbide-enhanced type invar alloy wire and preparing method thereof |
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Application publication date: 20220715 |