CN117867406A - Stainless steel wire rod, processing technology and application thereof - Google Patents
Stainless steel wire rod, processing technology and application thereof Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 132
- 238000005516 engineering process Methods 0.000 title abstract description 12
- 238000012545 processing Methods 0.000 title abstract description 12
- 238000005491 wire drawing Methods 0.000 claims abstract description 38
- 238000000137 annealing Methods 0.000 claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 238000005098 hot rolling Methods 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000009749 continuous casting Methods 0.000 claims description 21
- 229910052750 molybdenum Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 15
- 238000011282 treatment Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 36
- 238000005260 corrosion Methods 0.000 abstract description 36
- 239000000463 material Substances 0.000 abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 17
- 239000011651 chromium Substances 0.000 description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
- 238000002161 passivation Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 7
- 239000011733 molybdenum Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 229910017060 Fe Cr Inorganic materials 0.000 description 2
- 229910002544 Fe-Cr Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
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- 238000011056 performance test Methods 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910020632 Co Mn Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Abstract
The invention relates to the technical field of new stainless steel materials, and particularly discloses a processing technology of a stainless steel wire, wherein the stainless steel wire comprises the following chemical components in percentage by mass: cr:13% -15%, mo:0.5% -3%; co:3.4% -4.0%, mn:1.2% -1.6%, C:0.05% -0.10%, N:0.02% -0.14%, B:0.04% -0.18%, and the balance of Fe and unavoidable impurities. The invention also provides a processing technology of the stainless steel wire, which is simple, comprises the steps of casting raw materials according to a proportion, hot rolling and forming through a hot rolling mill, wiredrawing through a wiredrawing machine, annealing, wiredrawing again through the wiredrawing machine, annealing again and the like, and the prepared stainless steel wire has excellent corrosion resistance and wear resistance, and can be widely applied to the fields of construction, automobiles, aerospace, electronic equipment and the like.
Description
Technical Field
The invention relates to the technical field of new stainless steel materials, in particular to a stainless steel wire rod, a processing technology and application thereof.
Background
Stainless steel is a metal material with excellent corrosion resistance, high strength and good processability, and is widely applied to the fields of construction, automobiles, aerospace, electronic equipment and the like. The wire is an important form of metal material, and has the advantages of simple manufacture, convenient use, low price and the like. Among stainless steel wires, a stainless steel wire having excellent mechanical properties and corrosion resistance is attracting attention. However, the existing stainless steel wire often has problems in the manufacturing process, such as high processing difficulty, low production efficiency, high cost and the like.
Patent CN113789481B provides a stainless steel wire, a preparation method thereof and a stainless steel spring, wherein the stainless steel wire comprises the following chemical components in percentage by mass: c:0.03% -0.08%, ni:6.50% -7.50%, cr:16.50% -17.50%, N:0.15-0.17%, the said preparation method controls the solid solution temperature to 1000-1120 deg.C and limits the first pass deformation amount to below 15% in the second fine drawing on the basis of original technology, can produce the said stainless steel wire and spring prepared with this stainless steel wire steadily, and the said stainless steel wire reaches SWPA grade while the line diameter is 0.5mm, the invention through adjusting the raw material element content of original technology, controlling the solid solution temperature and improving the pass deformation amount, make the intensity, corrosion resistance of stainless steel wire used for spring get further improved.
Patent CN116393664B relates to a composite stainless steel wire and a processing technology thereof, and belongs to the technical field of stainless steel wires. The method comprises the steps of continuously casting raw materials to obtain a continuous casting blank, forging to obtain a stainless steel wire rod, carrying out solid solution treatment, annealing, water cooling, coating a coating agent on the surface, drawing to obtain a wire rod, and carrying out acid washing, water washing and whitening treatment to obtain the composite stainless steel wire rod. The composite stainless steel wire rod prepared by the process has good mechanical and corrosion resistance, and simultaneously effectively solves the problem that the composite stainless steel wire rod is easy to break in drawing. The content of B element and N element is increased, under the range provided by the invention, the N element has strong effect on the formation and stability of austenite, meanwhile, the austenite phase region can be enlarged, the B element has an effective effect on the corrosion resistance of the wire, and the combined part of the N element and the B element realizes the effective enhancement of the wear resistance of the wire.
In addition, the existing stainless steel wire may have a problem of insufficient corrosion resistance in some application fields, and even though the corrosion resistance is improved, the mechanical properties cannot be simultaneously improved. Therefore, the development of the stainless steel wire rod with excellent mechanical property and corrosion resistance and the preparation method thereof have important practical significance. Based on this, the present invention provides a stainless steel wire rod and a process for manufacturing the same.
Disclosure of Invention
In order to improve the corrosion resistance of the stainless steel wire, the invention provides the stainless steel wire and the processing technology thereof, and meets the requirements of the social market.
In a first aspect, the present invention provides a stainless steel wire rod, which adopts the following technical scheme:
a stainless steel wire, the chemical composition of the stainless steel wire comprises, in mass percent: cr:13% -15%, mo:0.5% -3%; co:3.4% -4.0%, mn:1.2% -1.6%, C:0.05% -0.10%, N:0.02% -0.14%, B:0.04% -0.18%, and the balance of Fe and unavoidable impurities.
Chromium is a key alloying element that affects the corrosion resistance of stainless steel. In the oxidizing medium, the corrosion resistance is improved with the increase of the chromium content. The reason why chromium can improve the corrosion resistance of stainless steel is mainly as follows: chromium can raise the electrode potential of Fe-Cr alloy stainless steel, and in addition, the Fe-Cr alloy stainless steel is easy to form a compact passivation film (FeO.Cr) 2 O 3 ) The passivation film formed by the layer is stable and complete, can be firmly combined with the matrix metal, and completely separates the matrix from the medium, thereby effectively preventing further oxidation or corrosion of the steel.
In a medium containing chloride ions (Cl), corrosion of local areas of stainless steel, i.e., pitting, results because chloride ions can damage the passivation film on the surface of stainless steel. In order to improve the corrosion resistance of stainless steel in a non-oxidizing medium, molybdenum element is generally added to stainless steel. The molybdenum element can promote the passivation of the stainless steel surface and enhance the resistance of the stainless steel to pitting corrosion and crevice corrosion. It is noted that molybdenum only works in chrome-containing steels because molybdenum can interact with chrome to form a dense oxide film, thereby enhancing the corrosion resistance of the stainless steel. Therefore, if molybdenum is not contained in the ferritic stainless steel, it is difficult to obtain satisfactory pitting corrosion resistance even if the chromium content is still high.
The addition of nitrogen can also significantly improve pitting and crack resistance. After dissolution of nitrogen in steel, the steel is treated with a corrosive solution consisting of N and H + NH provided by the reaction 4 + The P value in the cavity can be maintained and further expansion of the cavity can be prevented by the formation of the passivation film.
Further, the weight percentage content ratio of Cr and Mo is Cr/Mo=8.4-12.3; the weight percentage content ratio of Mo and C is Mo/C=13-28.
The structure and properties of stainless steel are largely dependent on the carbon content and its distribution. Carbon is an important element in stainless steel, and has a significant effect on the mechanical properties, corrosion resistance and workability of stainless steel. The change in carbon content can result in a change in the microstructure of the stainless steel, which in turn affects its overall performance. Therefore, controlling the carbon content and its distribution state is one of the key factors for optimizing the structure and performance of stainless steel. The control of Mo/c=13-28 in the invention can increase the tempering stability of stainless steel and improve the strength of steel.
As described above, chromium forms stable Cr on the surface of the material 2 O 3 A protective film which can reduce passivation electricity in steelA stream; meanwhile, molybdenum and chromium can produce synergistic effect, so that the pitting corrosion resistance can be obviously improved; molybdenum is enriched in the passivation film near one side of the matrix, so that the stability of the passivation film is improved; as the chromium content increases, the effect of molybdenum increases. And when Cr/Mo=8.4-12.3, the pitting corrosion resistance and the crack corrosion resistance of the stainless steel material in a chloride environment can be effectively improved.
Further, when the diameter of the stainless steel wire rod is 0.5-1.0mm, the tensile strength is 2500-2800MPa, and the lower yield strength is 1000-1200MPa.
Further, the elongation at break of the stainless steel wire is 14-18% and the number of bending times is 17-21.
Further, the chemical components of the stainless steel wire also comprise 0.11-0.20 of Ni, and the weight percentage content of Mo and Ni is more than or equal to 10.
On the basis, nickel and nitrogen enriched in the oxide film on the surface of the steel can produce a synergistic effect, and the stability of the passivation film is maintained, so that the corrosion resistance of the material is obviously improved. This synergistic effect is mainly due to the co-presence of nitrogen and nickel in the oxide film, which can promote the formation and stabilization of the passivation film. By introducing Ni, the corrosion resistance of the steel can be effectively enhanced, so that the steel can maintain stable performance in various severe environments. In the invention, when Mo/Ni is more than or equal to 10, the mechanical property and the corrosion resistance can be improved simultaneously.
Further, the chemical composition of the stainless steel wire also comprises 0.05-0.20% of S.
In a second aspect, the invention also provides a processing technology of the stainless steel wire rod, which adopts the following technical scheme:
the processing technology of the stainless steel wire rod specifically comprises the following steps:
(1) And (3) casting: smelting raw materials according to a proportion at 1600-1800 ℃; pouring the smelted stainless steel liquid into a continuous casting machine for continuous casting;
(2) And (3) hot rolling: heating the continuous casting billet after continuous casting to 750-800 ℃, and then forming by a hot rolling mill; the hot rolling process can effectively change the cross section shape of the billet into a required shape, and meanwhile, the method can also remarkably improve the strength and plasticity of the product;
(3) And (3) wiredrawing: carrying out wire drawing treatment on the stainless steel wire rod for at least 4 times by a wire drawing machine to obtain a wire rod with the diameter of 3-5mm; the wire drawing process can deeply change the microstructure of the material, so that the mechanical property and the surface quality of the product are improved. In the wire drawing process, the cross section size of the material is gradually reduced through continuous wire drawing of multiple passes, and the surface finish is obviously improved;
(4) Annealing: annealing is carried out in nitrogen atmosphere, the annealing temperature is 950-1000 ℃, and the retention time is 5-30min; after the wire drawing process, the stainless steel wire may have internal defects such as internal stress and grain boundaries. In order to eliminate these defects and restore their plasticity and toughness, an annealing treatment is required. During annealing, the stainless steel wire is heated to a proper temperature and then slowly cooled to realize the recovery of the performance; in addition, proper temperature and condition are selected for annealing, so that the stress can be eliminated, cracks can be prevented, the continuous processing of the material is facilitated, and the corrosion resistance is improved.
(5) And (5) drawing again: placing the annealed stainless steel wire into a wire drawing machine to perform wire drawing treatment for at least 1 single time to obtain a semi-finished stainless steel wire with the diameter of 0.5-1.0mm;
(6) And (5) annealing again: and (3) annealing again in nitrogen atmosphere to obtain the finished stainless steel wire, wherein the annealing temperature is 950-1000 ℃ and the residence time is 1-5min.
Further, with step 5) and step 6) as one step unit, the step unit is repeatedly performed a plurality of times.
Further, the reduction ratio of the single drawing in the step (3) is 18-32%, and the reduction ratio of the (n+1) th drawing is 1-3% larger than the (N) th drawing.
Further, the reduction ratio of the single wire drawing in the step (5) is 22-25%.
In a third aspect, the stainless steel wire of the present invention is used in the fields of construction, automobiles, aerospace, and electronic devices.
In summary, the invention has the following beneficial effects:
according to the stainless steel wire, the component proportion of Cr and Mo and the cost proportion of Mo and C are controlled, so that when the diameter of the stainless steel wire is 0.5-1.0mm, the tensile strength is 2500-2800MPa, the lower yield strength is 1000-1200MPa, and the excellent mechanical property is obtained, and meanwhile, the corrosion resistance is improved;
according to the stainless steel wire rod, the corrosion resistance of the stainless steel wire rod is further improved through the addition of Ni, and the mechanical property of the wire rod is further improved through controlling the component proportion of Mo and Ni;
the stainless steel wire disclosed by the invention is simple in processing technology and low in preparation cost, and the obtained stainless steel wire is excellent in corrosion resistance;
can be widely applied.
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Examples 1 to 3
The stainless steel wire in examples 1-3, the chemical composition of the stainless steel wire comprises, in mass percent: cr:14%, mo:1.4%; co:3.8%, mn:1.4%, C:0.05%, N:0.08%, B:0.11% of Fe and the balance of unavoidable impurities;
cr/mo=10; the weight percentage content ratio of Mo and C is Mo/C=28;
a process for manufacturing a stainless steel wire according to embodiment 1, comprising the steps of:
(1) And (3) casting: smelting raw materials according to a proportion at 1700 ℃; pouring the smelted stainless steel liquid into a continuous casting machine for continuous casting;
(2) And (3) hot rolling: heating the continuous casting billet after continuous casting to 770 ℃, and then shaping by a hot rolling mill;
(3) And (3) wiredrawing: carrying out wire drawing treatment on the stainless steel wire rod for 7 times by a wire drawing machine to obtain a wire rod with the diameter of 4mm;
(4) Annealing: annealing is carried out in nitrogen atmosphere, the annealing temperature is 970 ℃, and the residence time is 10min;
(5) And (5) drawing again: putting the annealed stainless steel wire into a wire drawing machine to perform 7 single wire drawing treatments on the stainless steel wire, and obtaining a semi-finished stainless steel wire with the diameter of 0.6mm;
(6) And (5) annealing again: and (3) annealing again in a nitrogen atmosphere to obtain the finished stainless steel wire, wherein the annealing temperature is 970 ℃, and the residence time is 3min.
Further, the reduction ratio of the single drawing in the step (3) is 25%, and the reduction ratio of the (n+1) th drawing is 2% larger than that of the (N) th drawing.
Further, the reduction ratio of the single wire drawing in the step (5) is 23%.
A process for manufacturing a stainless steel wire according to embodiment 2 comprises the steps of:
(1) And (3) casting: smelting raw materials according to a proportion at 1600 ℃; pouring the smelted stainless steel liquid into a continuous casting machine for continuous casting;
(2) And (3) hot rolling: heating the continuous casting billet after continuous casting to 800 ℃, and then forming by a hot rolling mill;
(3) And (3) wiredrawing: carrying out wire drawing treatment on the stainless steel wire rod for 6 times by a wire drawing machine to obtain a wire rod with the diameter of 4mm;
(4) Annealing: annealing is carried out in nitrogen atmosphere, the annealing temperature is 1000 ℃, and the residence time is 15min;
(5) And (5) drawing again: putting the annealed stainless steel wire into a wire drawing machine to perform 7 single wire drawing treatments on the stainless steel wire, and obtaining a semi-finished stainless steel wire with the diameter of 0.6mm;
(6) And (5) annealing again: and (3) annealing again in a nitrogen atmosphere to obtain the finished stainless steel wire, wherein the annealing temperature is 950 ℃ and the residence time is 2min.
Further, the reduction ratio of the single drawing in the step (3) is 30%, and the reduction ratio of the (n+1) th drawing is 3% larger than that of the (N) th drawing.
Further, the reduction ratio of the single wire drawing in the step (5) is 23%.
A process for manufacturing a stainless steel wire according to embodiment 3 comprises the steps of:
(1) And (3) casting: smelting raw materials according to a proportion at 1800 ℃; pouring the smelted stainless steel liquid into a continuous casting machine for continuous casting;
(2) And (3) hot rolling: heating the continuous casting billet after continuous casting to 800 ℃, and then forming by a hot rolling mill;
(3) And (3) wiredrawing: carrying out wire drawing treatment on the stainless steel wire rod for 7 times by a wire drawing machine to obtain a wire rod with the diameter of 4mm;
(4) Annealing: annealing is carried out in nitrogen atmosphere, the annealing temperature is 1000 ℃, and the retention time is 8min;
(5) And (5) drawing again: putting the annealed stainless steel wire into a wire drawing machine to perform 7 single wire drawing treatments on the stainless steel wire, and obtaining a semi-finished stainless steel wire with the diameter of 0.6mm;
(6) And (5) annealing again: and (3) annealing again in a nitrogen atmosphere to obtain the finished stainless steel wire, wherein the annealing temperature is 1000 ℃ and the residence time is 4min.
Further, the reduction ratio of the single drawing in the step (3) is 26%, and the reduction ratio of the (n+1) th drawing is 2% larger than that of the (N) th drawing.
Further, the reduction ratio of the single wire drawing in the step (5) is 23%.
Based on the production process of example 1, the mass percentages of the chemical components of the different examples and comparative examples were adjusted to obtain examples 4 to 16 and comparative examples 1 to 12.
The prepared stainless steel wire rod is then tested for corrosion resistance, tensile strength, lower yield strength, elongation at break and bending times.
The performance test method comprises the following steps:
to verify the properties of the stainless steel wires produced in examples 1 to 16 and comparative examples 1 to 12 of the present invention, the following tests were performed:
the samples of the above examples and comparative examples were subjected to corrosion resistance testing according to the method specified in GB/T10125-2012 Standard of salt spray test for Corrosion test of Artificial atmosphere; the experimental conditions are 36 ℃ and the NaCl concentration is 53g/L, PH value 7, the experimental period is at least 200 hours, and whether rust spots exist on the appearance or the quality is lost is judged after the test.
The tensile strength and the lower yield strength are detected according to GB/T230.1-2009 standard;
elongation at break was measured according to GB/T228.1-2010;
the bending times are measured according to GB/T238-200;
the composition of the stainless steel wire rods in examples 1 to 7 is shown in table 1:
TABLE 1
| No. | Cr | Mo | Co | Mn | C | N | B | Cr/Mo | Mo/C |
| 1 | 14 | 1.4 | 3.8 | 1.4 | 0.05 | 0.08 | 0.11 | 10 | 28 |
| 2 | 14 | 1.4 | 3.8 | 1.4 | 0.05 | 0.08 | 0.11 | 10 | 28 |
| 3 | 14 | 1.4 | 3.8 | 1.4 | 0.05 | 0.08 | 0.11 | 10 | 28 |
| 4 | 13 | 1.2 | 3.4 | 1.2 | 0.05 | 0.12 | 0.16 | 10.8 | 24 |
| 5 | 15 | 1.3 | 4.0 | 1.6 | 0.1 | 0.03 | 0.02 | 11.5 | 13 |
| 6 | 14 | 1.2 | 3.8 | 1.4 | 0.05 | 0.08 | 0.11 | 11.7 | 24 |
| 7 | 13 | 1.1 | 3.4 | 1.2 | 0.05 | 0.12 | 0.16 | 11.8 | 22 |
The composition of the stainless steel wire rods in examples 8 to 14 is shown in table 2:
TABLE 2
The stainless steel wire rod of example 15, wherein the stainless steel wire comprises the following chemical components in percentage by mass: cr:14%, mo:1.4%; co:3.8%, mn:1.4%, C:0.05%, N:0.08%, B:0.11%, ni:0.13%, S:0.13% of Fe and the balance of unavoidable impurities;
cr/mo=10; the weight percentage content ratio of Mo and C is Mo/C=28; and the weight percentage content of Mo and Ni is Mo/Ni=10.8.
The stainless steel wire rod of example 16, wherein the stainless steel wire comprises the following chemical components in percentage by mass: cr:13%, mo:1.2%; co:3.4%, mn:1.2%, C:0.05%, N:0.12%, B:0.16%, ni:0.12%, S:0.08%, and the balance of Fe and unavoidable impurities;
cr/mo=10.8; the weight percentage content ratio of Mo and C is Mo/C=24; and the weight percentage content of Mo and Ni is Mo/Ni=10.
The composition of the stainless steel wire rods in comparative examples 1 to 12 is shown in table 3:
TABLE 3 Table 3
The results of the performance tests for examples 1-16 and comparative examples 1-12 are shown in Table 4 below:
TABLE 4 Table 4
From the test results, it can be seen that: the properties of the stainless steel wire rods prepared in examples 1 to 16 of the present invention are improved to some extent relative to the overall properties of the stainless steel wire rods prepared in comparative examples 1 to 12.
According to the embodiment, the stainless steel wire rod realizes that when the diameter of the stainless steel wire rod is 0.5-1.0mm, the tensile strength is 2500-2800MPa, and the lower yield strength is 1000-1200MPa; the elongation at break of the stainless steel wire is 14-18%, and the bending times are 17-21. By the embodiments 8-16, 0.11-0.20 of Ni is added, and the weight percentage of Mo and Ni is controlled to be more than or equal to 10 percent of Mo/Ni, or 0.05-0.20 percent of S is added, so that the mechanical property and the corrosion resistance of the stainless steel wire are improved.
As is clear from comparative examples 10 to 12, when the tensile strength or the lower yield strength does not meet the control requirement, although the elongation at break and the number of bending are satisfactory, a stainless steel wire rod having satisfactory corrosion resistance cannot be obtained.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (10)
1. A stainless steel wire rod is characterized in that,
the stainless steel wire comprises the following chemical components in percentage by mass: cr:13% -15%, mo:0.5% -3%; co:3.4% -4.0%, mn:1.2% -1.6%, C:0.05% -0.10%, N:0.02% -0.14%, B:0.04% -0.18%, and the balance of Fe and unavoidable impurities.
2. A stainless steel wire according to claim 1, wherein the ratio Cr/mo=8.4-12.3 of the weight percentage content of Cr, mo; the weight percentage content ratio of Mo and C is Mo/C=13-28.
3. A stainless steel wire according to claim 1, wherein the stainless steel wire has a tensile strength of 2500-2800MPa and a lower yield strength of 1000-1200MPa when the diameter is 0.5-1.0 mm.
4. A stainless steel wire according to claim 3, wherein the stainless steel wire has an elongation at break of 14-18% and a number of bends of 17-21.
5. A stainless steel wire according to claim 1, wherein the chemical composition of the stainless steel wire further comprises 0.11-0.20 Ni, and the weight percentage content of Mo, ni is Mo/Ni not less than 10.
6. A stainless steel wire according to claim 1, wherein the chemical composition of the stainless steel wire further comprises 0.05-0.20% S.
7. Process for the production of stainless steel wire according to any one of claims 1 to 6, characterized by the fact that it comprises the following steps:
(1) And (3) casting: smelting raw materials according to a proportion at 1600-1800 ℃; pouring the smelted stainless steel liquid into a continuous casting machine for continuous casting;
(2) And (3) hot rolling: heating the continuous casting billet after continuous casting to 750-800 ℃, and then forming by a hot rolling mill;
(3) And (3) wiredrawing: carrying out wire drawing treatment on the stainless steel wire rod for at least 4 times by a wire drawing machine to obtain a wire rod with the diameter of 3-5mm;
(4) Annealing: annealing is carried out in nitrogen atmosphere, the annealing temperature is 950-1000 ℃, and the retention time is 5-30min;
(5) And (5) drawing again: placing the annealed stainless steel wire into a wire drawing machine to perform wire drawing treatment for at least 1 single time to obtain a semi-finished stainless steel wire with the diameter of 0.5-1.0mm;
(6) And (5) annealing again: and (3) annealing again in nitrogen atmosphere to obtain the finished stainless steel wire, wherein the annealing temperature is 950-1000 ℃ and the residence time is 1-5min.
8. The process for manufacturing a stainless steel wire rod according to claim 7, wherein the step 5) and the step 6) are repeated a plurality of times with one step unit.
9. The process for manufacturing a stainless steel wire rod according to claim 7, wherein the reduction ratio of the single drawing in the step (3) is 18 to 32%, and the reduction ratio of the n+1th drawing is 1 to 3% larger than the N-th drawing; the surface reduction rate of the single wire drawing in the step (5) is 22-25%.
10. Use of a stainless steel wire according to any one of claims 1-6, in the field of construction, automotive, aerospace, electronics.
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