CN113718137A - Processing method of IN718 alloy and semi-finished alloy strip prepared from IN718 alloy - Google Patents
Processing method of IN718 alloy and semi-finished alloy strip prepared from IN718 alloy Download PDFInfo
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- CN113718137A CN113718137A CN202110927882.6A CN202110927882A CN113718137A CN 113718137 A CN113718137 A CN 113718137A CN 202110927882 A CN202110927882 A CN 202110927882A CN 113718137 A CN113718137 A CN 113718137A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a processing method of an IN718 alloy and a semi-finished alloy strip prepared from the IN718 alloy, which comprises the following steps: s1, primary annealing pretreatment; s2, primary rolling; s3, primary solution annealing; s4, secondary rolling; s5, secondary solution annealing; s6, rolling for the third time; s7, carrying out tertiary solution annealing; and S8, aging process. According to the invention, the semi-finished alloy strip is subjected to one-time annealing pretreatment, the elongation reaches 40%, and the grain size is 6-7 grade. Meanwhile, the improvement of the aging process enables various performances such as HV, Rm, Rp0.2 and the like to be improved by 10%.
Description
Technical Field
The invention belongs to the technical field of high-temperature alloy, and particularly relates to a processing method of an IN718 alloy and a semi-finished alloy strip prepared from the IN718 alloy.
Background
The high-temperature alloy is a metal material which takes iron, nickel and uranium as the base and can work for a long time at a high temperature of more than 600 ℃ under the action of certain stress. The high-temperature alloy has high-temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance, good fracture toughness, good plasticity and other comprehensive properties. The high-temperature alloy is a single austenite matrix structure, and has good structural stability and use reliability at various temperatures. The IN718 alloy is a nickel-based high-temperature alloy which is subjected to precipitation strengthening by body-centered tetragonal gamma 'and face-centered cubic gamma', has good comprehensive performance within the temperature range of-253 to 700 ℃, has the yield strength below 650 ℃ at the head of a deformed high-temperature alloy, has good fatigue resistance, radiation resistance, oxidation resistance and corrosion resistance, and good processability, weldability and long-term structure stability, can be used for manufacturing various parts with complex shapes, and is widely applied to aerospace, nuclear and petroleum industries within the temperature range.
The IN718 alloy has difficulty forming the alloy due to its high strength characteristics at high temperatures. During the processing, the temperature is reduced too fast in the aging process, so that the phase transformation becomes large, the crystal grains are accelerated to grow and become coarse, and the mechanical property is slightly poor.
Therefore, a method for processing semi-finished alloy strips made of the IN718 alloy and the IN718 alloy is needed.
Disclosure of Invention
IN order to overcome the defects IN the prior art, the invention provides a processing method of an IN718 alloy and a semi-finished alloy strip prepared from the IN718 alloy.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides an IN718 alloy which comprises the following components IN parts by weight: carbon is less than or equal to 0.035%; manganese is less than or equal to 0.35 percent; silicon is less than or equal to 0.35 percent; phosphorus is less than or equal to 0.015 percent; sulfur is less than or equal to 0.015 percent; 17-21% of chromium; cobalt is less than or equal to 1 percent; 2.8-3.3% of molybdenum; 4.75 to 5.5 percent of niobium; 0.65-1.15% of titanium; 0.2-0.8% of aluminum; copper is less than or equal to 0.3 percent; 0.001-0.006% of boron; nitrogen is less than or equal to 0.007 percent; 10-15% of iron; the balance being nickel.
As a preferred technical scheme of the invention, the carbon content is 0.035%; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 21% of chromium; 1% of cobalt; 3.3 percent of molybdenum; 5.5 percent of niobium; 1.15 percent of titanium; 0.8 percent of aluminum; 0.3 percent of copper; 0.006% of boron; nitrogen 0.007%; 15% of iron; the balance being nickel.
As a preferred technical scheme of the invention, the carbon content is 0.035%; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 17% of chromium; 1% of cobalt; 2.8 percent of molybdenum; 4.75 percent of niobium; 0.65% of titanium; 0.2 percent of aluminum; 0.3 percent of copper; 0.001% of boron; nitrogen 0.007%; 10% of iron; the balance being nickel.
As a preferred technical scheme of the invention, the processing method of the semi-finished alloy strip prepared by adopting the IN718 alloy comprises the following steps:
s1, primary annealing pretreatment;
annealing the 1.0mm semi-finished alloy strip in an annealing furnace at the annealing speed of 1m/min and the annealing temperature of 1000 ℃;
s2, primary rolling;
rolling the 1.0mm semi-finished alloy strip into a semi-finished alloy strip with the thickness of 0.5mm by adopting a 20-roll mill for 6-7 passes;
s3, primary solution annealing;
passing the semi-finished alloy belt of 0.5mm after primary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy belt during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s4, secondary rolling;
rolling the 0.5mm semi-finished product into a semi-finished alloy strip with the thickness of 0.25mm by adopting a 20-roll mill for 7-8 times of rolling;
s5, secondary solution annealing;
passing the semi-finished alloy strip with the thickness of 0.25mm after secondary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s6, rolling for the third time;
rolling the 0.25mm semi-finished product into an alloy strip with the thickness of 0.14mm by adopting a 20-roll mill for 1 pass, and selecting a Ra0.2um sand blasting roll as a working roll for rolling;
s7, carrying out tertiary solution annealing;
passing the alloy strip of 0.14mm after the third rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 980 ℃;
s8, aging process;
the alloy belt with the thickness of 0.14mm is kept at the temperature of 720 ℃ for 8 hours, and then is cooled to 620 ℃ at the speed of 80 ℃/h and then kept at the temperature for 8 hours.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the semi-finished alloy strip is subjected to one-time annealing pretreatment, the elongation reaches 40%, and the grain size is 6-7 grade. Meanwhile, the improvement of the aging process enables various performances such as HV, Rm, Rp0.2 and the like to be improved by 10%.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
As a first embodiment, this embodiment provides an IN718 alloy consisting of, IN parts by weight: 0.035% of carbon; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 21% of chromium; 1% of cobalt; 3.3 percent of molybdenum; 5.5 percent of niobium; 1.15 percent of titanium; 0.8 percent of aluminum; 0.3 percent of copper; 0.006% of boron; nitrogen 0.007%; 15% of iron; the balance being nickel.
Example 2
As a second embodiment, this embodiment provides an IN718 alloy consisting of, IN parts by weight: 0.035% of carbon; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 17% of chromium; 1% of cobalt; 2.8 percent of molybdenum; 4.75 percent of niobium; 0.65% of titanium; 0.2 percent of aluminum; 0.3 percent of copper; 0.001% of boron; nitrogen 0.007%; 10% of iron; the balance being nickel.
Example 3
As a third embodiment, the present embodiment provides a method of processing a semi-finished alloy strip made from an IN718 alloy, comprising the steps of:
s1, primary annealing pretreatment;
annealing the 1.0mm semi-finished alloy strip in an annealing furnace at the annealing speed of 1m/min and the annealing temperature of 1000 ℃;
s2, primary rolling;
rolling the 1.0mm semi-finished alloy strip into a semi-finished alloy strip with the thickness of 0.5mm by adopting a 20-roll mill for 6-7 passes;
s3, primary solution annealing;
passing the semi-finished alloy belt of 0.5mm after primary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy belt during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s4, secondary rolling;
rolling the 0.5mm semi-finished product into a semi-finished alloy strip with the thickness of 0.25mm by adopting a 20-roll mill for 7-8 times of rolling;
s5, secondary solution annealing;
passing the semi-finished alloy strip with the thickness of 0.25mm after secondary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s6, rolling for the third time;
rolling the 0.25mm semi-finished product into an alloy strip with the thickness of 0.14mm by adopting a 20-roll mill for 1 pass, and selecting a Ra0.2um sand blasting roll as a working roll for rolling;
s7, carrying out tertiary solution annealing;
passing the alloy strip of 0.14mm after the third rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 980 ℃;
s8, aging process;
the alloy belt with the thickness of 0.14mm is kept at the temperature of 720 ℃ for 8 hours, and then is cooled to 620 ℃ at the speed of 80 ℃/h and then kept at the temperature for 8 hours.
According to the invention, the semi-finished alloy strip is subjected to one-time annealing pretreatment, the elongation reaches 40%, and the grain size is 6-7 grade. Meanwhile, the improvement of the aging process enables various performances such as HV, Rm, Rp0.2 and the like to be improved by 10%.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The IN718 alloy is characterized by consisting of the following components IN parts by weight: carbon is less than or equal to 0.035%; manganese is less than or equal to 0.35 percent; silicon is less than or equal to 0.35 percent; phosphorus is less than or equal to 0.015 percent; sulfur is less than or equal to 0.015 percent; 17-21% of chromium; cobalt is less than or equal to 1 percent; 2.8-3.3% of molybdenum; 4.75 to 5.5 percent of niobium; 0.65-1.15% of titanium; 0.2-0.8% of aluminum; copper is less than or equal to 0.3 percent; 0.001-0.006% of boron; nitrogen is less than or equal to 0.007 percent; 10-15% of iron; the balance being nickel.
2. The IN718 alloy of claim 1, wherein carbon is 0.035%; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 21% of chromium; 1% of cobalt; 3.3 percent of molybdenum; 5.5 percent of niobium; 1.15 percent of titanium; 0.8 percent of aluminum; 0.3 percent of copper; 0.006% of boron; nitrogen 0.007%; 15% of iron; the balance being nickel.
3. The IN718 alloy of claim 1, wherein carbon is 0.035%; 0.35 percent of manganese; 0.35% of silicon; 0.015% of phosphorus; 0.015% of sulfur; 17% of chromium; 1% of cobalt; 2.8 percent of molybdenum; 4.75 percent of niobium; 0.65% of titanium; 0.2 percent of aluminum; 0.3 percent of copper; 0.001% of boron; nitrogen 0.007%; 10% of iron; the balance being nickel.
4. A method of processing a semi-finished alloy strip produced from the IN718 alloy of any of claims 1-3, comprising the steps of:
s1, primary annealing pretreatment;
annealing the 1.0mm semi-finished alloy strip in an annealing furnace at the annealing speed of 1m/min and the annealing temperature of 1000 ℃;
s2, primary rolling;
rolling the 1.0mm semi-finished alloy strip into a semi-finished alloy strip with the thickness of 0.5mm by adopting a 20-roll mill for 6-7 passes;
s3, primary solution annealing;
passing the semi-finished alloy belt of 0.5mm after primary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy belt during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s4, secondary rolling;
rolling the 0.5mm semi-finished product into a semi-finished alloy strip with the thickness of 0.25mm by adopting a 20-roll mill for 7-8 times of rolling;
s5, secondary solution annealing;
passing the semi-finished alloy strip with the thickness of 0.25mm after secondary rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 1000 ℃;
s6, rolling for the third time;
rolling the 0.25mm semi-finished product into an alloy strip with the thickness of 0.14mm by adopting a 20-roll mill for 1 pass, and selecting a Ra0.2um sand blasting roll as a working roll for rolling;
s7, carrying out tertiary solution annealing;
passing the alloy strip of 0.14mm after the third rolling through a degreasing and cleaning section of a continuous annealing line, removing grease remained on the surface of the semi-finished alloy strip during rolling, drying and entering a bright annealing furnace protected by total hydrogen, wherein the annealing speed is 1m/min, and the annealing temperature is 980 ℃;
s8, aging process;
the alloy belt with the thickness of 0.14mm is kept at the temperature of 720 ℃ for 8 hours, and then is cooled to 620 ℃ at the speed of 80 ℃/h and then kept at the temperature for 8 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927882.6A CN113718137A (en) | 2021-08-12 | 2021-08-12 | Processing method of IN718 alloy and semi-finished alloy strip prepared from IN718 alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110927882.6A CN113718137A (en) | 2021-08-12 | 2021-08-12 | Processing method of IN718 alloy and semi-finished alloy strip prepared from IN718 alloy |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1343184A (en) * | 1970-02-09 | 1974-01-10 | Wiggin & Co Ltd Henry | Nickel-chromium-iron alloys |
| WO1997014819A1 (en) * | 1995-10-18 | 1997-04-24 | Framatome | Method for heat treating a nickel alloy strip material, and resulting product |
| CN111842486A (en) * | 2020-06-24 | 2020-10-30 | 江苏圣珀新材料科技有限公司 | Cold rolling process of high-temperature alloy GH4169 |
| CN112795857A (en) * | 2020-12-12 | 2021-05-14 | 河钢股份有限公司 | Method for improving comprehensive performance of GH4169 alloy plate |
-
2021
- 2021-08-12 CN CN202110927882.6A patent/CN113718137A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1343184A (en) * | 1970-02-09 | 1974-01-10 | Wiggin & Co Ltd Henry | Nickel-chromium-iron alloys |
| WO1997014819A1 (en) * | 1995-10-18 | 1997-04-24 | Framatome | Method for heat treating a nickel alloy strip material, and resulting product |
| CN111842486A (en) * | 2020-06-24 | 2020-10-30 | 江苏圣珀新材料科技有限公司 | Cold rolling process of high-temperature alloy GH4169 |
| CN112795857A (en) * | 2020-12-12 | 2021-05-14 | 河钢股份有限公司 | Method for improving comprehensive performance of GH4169 alloy plate |
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