CN116060440A - Nickel-based alloy wire rod and preparation method thereof - Google Patents
Nickel-based alloy wire rod and preparation method thereof Download PDFInfo
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- CN116060440A CN116060440A CN202310202500.2A CN202310202500A CN116060440A CN 116060440 A CN116060440 A CN 116060440A CN 202310202500 A CN202310202500 A CN 202310202500A CN 116060440 A CN116060440 A CN 116060440A
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- alloy wire
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to the technical field of metal material rolling, in particular to a nickel-based alloy wire rod and a preparation method thereof, creatively proposes to adopt lower rolling temperature and multipass low-deformation rolling, control the rolling surface quality from a rough rolling unit and a medium rolling unit, regulate and control the uniformity of deformation, avoid the surface defects from being inherited to a subsequent finish rolling unit, and greatly improve the yield. The wire rod produced by the invention has no defects such as scab and cracking on the surface, the grain size is fine and uniform, the yield strength is more than or equal to 400MPa, the elongation is more than or equal to 70%, the average grain size is less than or equal to 6.5 mu m, and the wire rod has high surface quality and excellent balanced comprehensive performance.
Description
Technical Field
The invention relates to the technical field of metal material rolling, in particular to a nickel-based alloy wire rod and a preparation method thereof.
Background
For nickel-base alloys, the conventional wire rolling process for carbon steel and stainless steel cannot be applied to the production of nickel-base alloy wires, and the nickel-base alloy wires have the advantages of high alloy elements, large deformation resistance and narrow processing interval. At present, the following problems mainly exist in the production process of nickel-based alloy wires in China: the rolling pass has poor property and uneven grain distribution, the surface of the produced wire has defects of scab, cracking and the like, and only a few enterprises can roll the nickel-base alloy wire, but the whole process yield is less than 70 percent, and the surface is extremely easy to generate scratches, microcracks and the like. At present, the production technology of nickel-base alloy in China has obvious gap with foreign countries, and high-end nickel-base alloy wires still need to be imported, so that the exploration of the preparation method of the nickel-base alloy wires is very important.
Disclosure of Invention
In order to solve the problems in the prior art, the main purpose of the invention is to provide a nickel-based alloy wire rod with high surface quality and excellent balanced comprehensive performance and a preparation method thereof.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
the preparation method of the nickel-based alloy wire comprises the following steps:
s1, heating a blank;
s2, rough rolling
The rough rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of rough rolling is 1.2-1.4, and the rough rolling passes are 9-15 times;
s3, middle rolling
The intermediate rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of the intermediate rolling is 1.15-1.25, and the intermediate rolling passes are 10-18 times;
s4, finish rolling
The finish rolling temperature is 900-950 ℃, the single-pass elongation coefficient of the finish rolling is 1.05-1.15, and the finish rolling passes are 6-10 times;
s5, clamping, feeding and spinning, and air cooling.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S1, heating the blank to 1130-1160 ℃ by adopting a heating furnace, and preserving heat for 30-240 min; and then cooling to 950-1030 ℃, wherein the oxygen content in the heating furnace is less than or equal to 2 vol%.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S2, the rough rolling speed is 0.5-5 m/S.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S2, a pulse device is arranged on each pass of roller, and an induction temperature compensation device is arranged at the rear end of the rough rolling unit.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S3, the intermediate rolling speed is 0.5-20 m/S.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S3, a pulse device is arranged on each pass of roller, and an induction temperature compensation device is arranged at the rear end of the middle rolling unit.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S4, the finish rolling speed is 15-120 m/S.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S4, the finish rolling is followed by water cooling.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the step S5, the spinning temperature is 880-930 ℃.
As a preferable scheme of the preparation method of the nickel-based alloy wire rod, the preparation method comprises the following steps: in the steps S2 and S3, the frequency of the pulse device is 10-800 Hz, the pulse width is 3-100 mu S, and the voltage is 10-120V.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
the nickel-based alloy wire is prepared by adopting the preparation method.
As a preferable scheme of the nickel-based alloy wire rod, the invention comprises the following steps: the surface of the nickel-based alloy wire rod is free from scab and cracking defects; the yield strength is more than or equal to 400MPa, the elongation is more than or equal to 70 percent, and the average grain size is less than or equal to 6.5 mu m.
The beneficial effects of the invention are as follows:
the invention provides a nickel-based alloy wire rod and a preparation method thereof, creatively provides a method for controlling the rolling surface quality from a rough rolling unit and a medium rolling unit by adopting lower rolling temperature and multi-pass low-deformation rolling, regulating and controlling the uniformity of deformation, avoiding surface defects from being transmitted to a subsequent finish rolling unit, and greatly improving the yield. The wire rod produced by the invention has no defects such as scab and cracking on the surface, the grain size is fine and uniform, the yield strength is more than or equal to 400MPa, the elongation is more than or equal to 70%, the average grain size is less than or equal to 6.5 mu m, and the wire rod has high surface quality and excellent balanced comprehensive performance.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a nickel-based alloy wire rod with high surface quality and excellent balanced comprehensive performance and a preparation method thereof.
According to one aspect of the invention, the invention provides the following technical scheme:
the preparation method of the nickel-based alloy wire comprises the following steps:
s1, heating a blank;
s2, rough rolling
The rough rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of rough rolling is 1.2-1.4, and the rough rolling passes are 9-15 times; specifically, the rough rolling temperature may be, for example, but not limited to, any one or a range between any two of 950 ℃, 960 ℃, 970 ℃, 980 ℃, 990 ℃, 1000 ℃, 1010 ℃, 1020 ℃, 1030 ℃; the single pass elongation coefficient of the roughing may be, for example, but not limited to, any one or a range between any two of 1.2, 1.23, 1.25, 1.27, 1.3, 1.32, 1.35, 1.38, 1.4; the rough pass may be, for example, but not limited to, any one or range between any two of 9, 10, 11, 12, 13, 14, 15;
s3, middle rolling
The intermediate rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of the intermediate rolling is 1.15-1.25, and the intermediate rolling passes are 10-18 times; specifically, the mid-rolling temperature may be, for example, but not limited to, any one or a range between any two of 950 ℃, 960 ℃, 970 ℃, 980 ℃, 990 ℃, 1000 ℃, 1010 ℃, 1020 ℃, 1030 ℃; the single pass elongation coefficient of the mid-roll may be, for example, but not limited to, any one or a range between any two of 1.15, 1.17, 1.2, 1.23, 1.25; the intermediate pass may be, for example, but not limited to, a range between any one or any two of 10, 11, 12, 13, 14, 15, 16, 17, 18;
s4, finish rolling
The finish rolling temperature is 900-950 ℃, the single-pass elongation coefficient of the finish rolling is 1.05-1.15, and the finish rolling passes are 6-10 times; specifically, the finish rolling temperature may be, for example, but not limited to, any one or a range between any two of 900 ℃, 910 ℃, 920 ℃, 930 ℃, 940 ℃, 950 ℃; the single pass elongation coefficient of the finish rolling may be, for example, but not limited to, any one or a range between any two of 1.05, 1.08, 1.1, 1.12, 1.15; the finishing pass may be, for example, but not limited to, any one or a range between any two of 6, 7, 8, 9, 10;
s5, clamping, feeding and spinning, and air cooling.
The rough rolling and the medium rolling adopt lower rolling temperature and low elongation coefficient (small deformation) and multi-pass rolling to ensure the occurrence of dynamic recrystallization of the whole section of the rolled piece and avoid the occurrence of defects such as cracking, indentation and the like. The rough rolling, the medium rolling and the finish rolling all adopt lower extension coefficients, which is beneficial to improving the difference of the overall length and the size, reducing the fluctuation when the roller bites and improving the surface quality and the precision of the rolling size.
Preferably, in the step S1, a heating furnace is used to heat the blank to 1130-1160 ℃ for heat preservation, and the heat preservation time is 30-240 min, so as to ensure that the precipitated phase left in the previous step is eliminated; then cooling to 950-1030 ℃, wherein the oxygen content in the heating furnace is less than or equal to 2 vol%, so that surface oxidation caused by long-time heat preservation is avoided; the continuous rolling blank is a blank which is subjected to cogging forging and surface polishing; in particular, the soak temperature may be, for example, but not limited to, any one or a range between any two of 1130 ℃, 1135 ℃, 1140 ℃, 1145 ℃, 1150 ℃, 1155 ℃, 1160 ℃; the incubation time may be, for example, but is not limited to, any one or a range between any two of 30min, 60min, 90min, 120min, 150min, 180min, 210min, 240min; the temperature after cooling may be, for example, but not limited to, any one or any range between 950 ℃, 960 ℃, 970 ℃, 980 ℃, 990 ℃, 1000 ℃, 1010 ℃, 1020 ℃, 1030 ℃;
preferably, in the step S2, the rough rolling speed is 0.5 to 5m/S; the pulse device is arranged on the roller of each pass, and the rear end of the rough rolling unit is provided with the induction temperature compensating device. Specifically, the roughing speed may be, for example, but not limited to, any one or a range between any two of 0.5m/s, 1m/s, 1.5m/s, 2m/s, 2.5m/s, 3m/s, 3.5m/s, 4m/s, 4.5m/s, 5m/s;
preferably, in the step S3, the intermediate rolling speed is 0.5-20 m/S; the pulse device is arranged on each pass of roller, and the rear end of the middle rolling unit is provided with the induction temperature compensation device. Specifically, the mid-rolling speed may be, for example, but not limited to, any one of 0.5m/s, 1m/s, 2m/s, 3m/s, 4m/s, 5m/s, 6m/s, 7m/s, 8m/s, 9m/s, 10m/s, 11m/s, 12m/s, 13m/s, 14m/s, 15m/s, 16m/s, 17m/s, 18m/s, 19m/s, 20m/s, or a range between any two thereof;
the rear ends of the rough rolling unit and the middle rolling unit are provided with induction temperature compensating devices, and the distance between the induction temperature compensating devices and the next working procedure is kept to be 4-5 times of the induction heating range, so that the temperature transmission between the core part and the surface of the blank after temperature compensation is more uniform, and the temperature difference between the head and the tail of the rolled material is not more than 30 ℃. In addition, the positive electrode and the negative electrode of the pulse device assembled by the rollers of the rough rolling unit and the middle rolling unit are respectively connected with the upper roller and the lower roller (or the left roller and the right roller), and insulation between the two rollers is ensured. The frequency of the pulse device is 10-800 Hz, the pulse width is 3-100 mu s, and the voltage is 10-120V. The rough rolling and the medium rolling are carried out at lower temperature, so that the surface oxide skin in the rolling process can be greatly reduced. The instantaneous pulse current in the rolling process of the rough rolling unit and the intermediate rolling unit can accelerate the dislocation movement and reduce the accumulation of surface dislocation of the blank, thereby reducing the deformation resistance and promoting the generation of subgrain boundary and recrystallization. In particular, the frequency of the pulsing means may be, for example, but not limited to, any one or a range between any two of 10Hz, 20Hz, 50Hz, 100Hz, 200Hz, 300Hz, 400Hz, 500Hz, 600Hz, 700Hz, 800 Hz; the pulse width may be, for example, but not limited to, any one or a range between any two of 3 μs, 5 μs, 10 μs, 20 μs, 30 μs, 40 μs, 50 μs, 60 μs, 70 μs, 80 μs, 90 μs, 100 μs; the voltage may be, for example, but not limited to, any one or a range between any two of 10V, 20V, 30V, 40V, 50V, 60V, 70V, 80V, 90V, 100V, 110V, 120V;
preferably, in the step S4, the finish rolling speed is 15-120 m/S; and (5) performing water cooling treatment after finish rolling. Specifically, the finish rolling speed may be, for example, but not limited to, 15m/s, 20m/s, 30m/s, 40m/s, 50m/s, 60m/s, 70m/s, 80m/s, 90m/s, 100m/s, 110m/s, 120m/s, or a range between any one or any two thereof;
preferably, in the step S5, the spinning temperature is 880-930 ℃. In particular, the laying temperature can be, for example, but not limited to, any one or a range between any two of 880 ℃, 890 ℃, 900 ℃, 910 ℃, 920 ℃, 930 ℃;
according to another aspect of the invention, the invention provides the following technical scheme:
the nickel-based alloy wire is prepared by adopting the preparation method.
As a preferable scheme of the nickel-based alloy wire rod, the invention comprises the following steps: the surface of the nickel-based alloy wire rod is free from scab and cracking defects; the yield strength is more than or equal to 400MPa, the elongation is more than or equal to 70 percent, and the average grain size is less than or equal to 6.5 mu m.
The technical scheme of the invention is further described below by combining specific embodiments.
Example 1
A preparation method of an N06625 nickel-based alloy phi 8mm wire comprises the following steps:
s1, heating the blank
And (3) heating the N06625 nickel-based alloy with the diameter phi of 120mm, which is forged and cogged, to 1150 ℃, preserving heat for 90min, wherein the oxygen content in the furnace is 1.8vol%, and cooling to 1020 ℃ for rolling.
S2, rough rolling
The rough rolling temperature is 1020 ℃, the single-pass extension coefficient of rough rolling is 1.32, and the number of rough rolling passes is 11; the rolling speed is 2m/s, and the section diameter of the rolled wire rod is phi 52mm. The pulse voltage during rolling is 40V, the frequency is 400Hz, and the pulse width is 40 mu s.
S3, middle rolling
The intermediate rolling temperature is 1020 ℃, the single-pass extension coefficient of intermediate rolling is 1.2, and the intermediate rolling passes are 12 times; the rolling speed is 3.5m/s, and the section diameter of the rolled wire rod is phi 16mm. The pulse voltage during rolling is 40V, the frequency is 400Hz, and the pulse width is 40 mu s.
S4, finish rolling
The finish rolling temperature is 930 ℃, the single-pass elongation coefficient of finish rolling is 1.1, and the finish rolling passes are 8; the rolling speed is 80m/s, and the section diameter of the nickel-base alloy wire rod after rolling is phi 8mm.
S5, clamping and feeding the spinning, wherein the spinning temperature is 890 ℃, and then air cooling.
The wire rod prepared in this example has a yield strength of 430MPa, an elongation of 70%, an average grain size of 6.3 μm, and good surface quality, and no scarring and open grain.
Example 2
A preparation method of an Incoloy825 nickel-based alloy phi 6mm wire comprises the following steps:
s1, heating the blank
The Incoloy825 nickel-based alloy which is forged and cogged and has the diameter phi of 150mm after surface grinding is heated to 1130 ℃ and kept for 120min, the oxygen content in the furnace is 1.5vol%, and the temperature is reduced to 980 ℃ for preparation of rolling.
S2, rough rolling
The rough rolling temperature is 1980 ℃, the single-pass extension coefficient of rough rolling is 1.35, and the rough rolling passes are 11 times; the rolling speed is 1.5m/s, and the section diameter of the rolled wire rod is phi 65mm. The pulse voltage in the rolling process is 50V, the frequency is 450Hz, and the pulse width is 60 mu s.
S3, middle rolling
The intermediate rolling temperature is 980 ℃, the single-pass extension coefficient of intermediate rolling is 1.23, and the intermediate rolling passes are 12 times; the rolling speed is 3m/s, and the section diameter of the rolled wire rod is phi 20mm. The pulse voltage in the rolling process is 50V, the frequency is 450Hz, and the pulse width is 60 mu s.
S4, finish rolling
The finish rolling temperature is 900 ℃, the single-pass elongation coefficient of finish rolling is 1.13, and the finish rolling passes are 8; the rolling speed is 100m/s, and the section diameter of the nickel-base alloy wire rod after rolling is phi 6mm.
S5, clamping and feeding the spinning, wherein the spinning temperature is 900 ℃, and then air cooling.
The wire rod prepared in this example has a yield strength of 406MPa, an elongation of 73%, an average grain size of 5.5 μm, and good surface quality, and no scarring and open grain.
Comparative example 1
Unlike embodiment 1 of the present invention,
only rough rolling and finish rolling were performed, and the process parameters of rough rolling and finish rolling were the same as in example 1.
The wire rod prepared in this comparative example had a yield strength of 412MPa, an elongation of 57%, an average grain size of 8.5 μm, and significant indentations in the middle and tail regions, particularly in the tail region, of the rolled material.
Comparative example 2
Unlike embodiment 1 of the present invention,
the rough rolling temperature is 1150 ℃ and the intermediate rolling temperature is 1130 ℃.
The wire rod prepared in this comparative example had a yield strength of 287MPa, an elongation of 76%, an average grain size of 38 μm, and a continuous small-block scar and significant scale adhesion on the surface.
Comparative example 3
Unlike embodiment 1 of the present invention,
the rough rolling pass is 6 times, and the single-pass extension coefficient is 1.44;
the middle rolling pass is 6 times, and the single-pass extension coefficient is 1.32;
the finish rolling pass is 6 times, and the single pass elongation coefficient is 1.15;
the wire rod prepared in this comparative example had a yield strength of 523MPa, an elongation of 48%, an average grain size of 6.9 μm, surface-evident indentations, and microcracks were detected in a part of the area.
The invention creatively provides a method for adopting lower rolling temperature and multi-pass low-deformation rolling, controlling the rolling surface quality from the rough rolling unit and the medium rolling unit, regulating and controlling the uniformity of deformation, avoiding the surface defects from being transmitted to the subsequent finish rolling unit, and greatly improving the yield. The wire rod produced by the invention has the advantages of no defects such as scab and cracking on the surface, fine and uniform grain size, yield strength of more than or equal to 400MPa, elongation of more than or equal to 70%, average grain size of less than or equal to 6.5 mu m, high surface quality and excellent balanced comprehensive performance, and is convenient for large-scale industrial production and application. The nickel-based alloy wire rod prepared by the method of the invention has surface defects, and the yield strength or the elongation rate of the nickel-based alloy wire rod is far lower than that of the nickel-based alloy wire rod prepared by the method of the invention.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The preparation method of the nickel-based alloy wire is characterized by comprising the following steps of:
s1, heating a blank;
s2, rough rolling
The rough rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of rough rolling is 1.2-1.4, and the rough rolling passes are 9-15 times;
s3, middle rolling
The intermediate rolling temperature is 950-1030 ℃, the single-pass elongation coefficient of the intermediate rolling is 1.15-1.25, and the intermediate rolling passes are 10-18 times;
s4, finish rolling
The finish rolling temperature is 900-950 ℃, the single-pass elongation coefficient of the finish rolling is 1.05-1.15, and the finish rolling passes are 6-10 times;
s5, clamping, feeding and spinning, and air cooling.
2. The method for preparing a nickel-based alloy wire according to claim 1, wherein in the step S1, a heating furnace is used to heat the blank to 1130-1160 ℃ for 30-240 min; and then cooling to 950-1030 ℃, wherein the oxygen content in the heating furnace is less than or equal to 2 vol%.
3. The method according to claim 1, wherein in the step S2, the rough rolling speed is 0.5-5 m/S, a pulse device is installed on each pass of roller, and an induction temperature compensating device is arranged at the rear end of the rough rolling unit.
4. The method for preparing a nickel-base alloy wire rod according to claim 1, wherein in the step S3, the intermediate rolling speed is 0.5-20 m/S, a pulse device is installed on each pass of roller, and an induction temperature compensating device is arranged at the rear end of the intermediate rolling unit.
5. The method for producing a nickel-base alloy wire according to claim 1, wherein in the step S4, the finish rolling speed is 15 to 120m/S.
6. The method for producing a nickel-base alloy wire rod according to claim 1, wherein in step S4, the finish rolling is followed by water cooling.
7. The method according to claim 1, wherein in the step S5, the spinning temperature is 880-930 ℃.
8. The method for producing a nickel-base alloy wire according to claim 3 or 4, wherein the frequency of the pulse device is 10 to 800hz, the pulse width is 3 to 100 μs, and the voltage is 10 to 120v.
9. A nickel-based alloy wire rod, characterized in that the nickel-based alloy wire rod is prepared by the preparation method of any one of claims 1-8.
10. The nickel-base alloy wire according to claim 9, wherein the surface of the nickel-base alloy wire is free of scarring and cracking defects; the yield strength is more than or equal to 400MPa, the elongation is more than or equal to 70 percent, and the average grain size is less than or equal to 6.5 mu m.
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