CN111304566A - Heat treatment method of hard GH5605 high-temperature alloy cold-rolled strip - Google Patents
Heat treatment method of hard GH5605 high-temperature alloy cold-rolled strip Download PDFInfo
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- CN111304566A CN111304566A CN202010149106.3A CN202010149106A CN111304566A CN 111304566 A CN111304566 A CN 111304566A CN 202010149106 A CN202010149106 A CN 202010149106A CN 111304566 A CN111304566 A CN 111304566A
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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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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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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
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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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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- 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
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a heat treatment method of a hard GH5605 high-temperature alloy cold-rolled strip, which aims to carry out cold rolling deformation by adopting a deformation rate of 30-45%, and carry out heat treatment at the temperature of 1165-1230 ℃ in a continuous heat treatment furnace under the middle protective atmosphere so as to continue cold rolling processing; and then annealing treatment is carried out in a protective atmosphere continuous heat treatment furnace at 950-980 ℃, and the capability of bearing bending plastic deformation is improved on the premise that the strength and the hardness are basically unchanged. The invention has the advantages that: the process design is reasonable: cold working deformation process, intermediate softening annealing process and recovery heat treatment process; particularly, the recovery temperature is 950 ℃ to 980 ℃, on the premise that the strength and the hardness are basically unchanged after the heat treatment at the temperature,the capability of bearing bending plastic deformation is improved, which is the existing theoretical recovery temperature (0.25-0.3) TMelting Point(TMelting PointAbsolute temperature of the melting point of the metal).
Description
Technical Field
The invention belongs to the technical field of heat treatment, and relates to a heat treatment method of a hard GH5605 high-temperature alloy cold-rolled strip, which can improve the capability of bearing bending plastic deformation on the basis of ensuring high strength and high hardness of the strip.
Background
GH5605 is Co-Cr-Ni-based solid solution strengthening type deformation high-temperature alloy, 20% of chromium and 15% of tungsten are added into the alloy for solid solution strengthening, and the specific chemical composition (%): carbon: 0.05-0.15, silicon is not more than 0.40, manganese: 1.00-2.00%, phosphorus is not more than 0.040%, sulfur is not more than 0.03%, and chromium: 19.00-21.00, nickel: 9.00-11.00, tungsten: 14.00-16.00, iron is not more than 3.00, cobalt: and (4) remaining; the alloy has moderate endurance and creep strength below 815 deg.c and excellent antioxidant performance below 1090 deg.c. There are two existing methods for producing GH5605 strip: one is to adopt the appropriate cold working process, improve strength and hardness of the strip material through cold working deformation, but because the alloy has larger cold work hardening rate and poor plasticity, the bending test can not meet the standard requirement; the other method is that after the strip is cold-processed to the size of a finished product, the strip is subjected to solution treatment at 1175-1230 ℃ or stress relief annealing treatment at 1165-1185 ℃, and although the method can meet the bending test requirements, the hardness of the strip is lower than the standard requirements. At present, the GH5605 high-temperature alloy cold-rolled strip is processed mainly by adopting a second method, namely cold working deformation, solution treatment and high-temperature stress relief annealing. Both methods cannot ensure that the strip has high Hardness (HV) 380-450 and sufficient bending performance. Therefore, the hard GH5605 high-temperature alloy cold-rolled strip cannot meet the standard requirements, and the use of the hard GH5605 high-temperature alloy cold-rolled strip on a military engine is influenced.
Disclosure of Invention
The invention discloses a heat treatment method of a hard GH5605 high-temperature alloy cold-rolled strip, and aims to improve the capability of the strip for bearing bending plastic deformation on the basis of high strength and high hardness by controlling the cold rolling deformation rate and the heat treatment temperature.
In order to achieve the purpose, the invention adopts the following specific method and steps:
⑴ smelting electrode blank in vacuum induction furnace, electroslag remelting in electroslag furnace, forging and cogging electroslag ingot, rolling in four-roller reversing hot mill, solid dissolving, and water milling to remove surface oxide skin to obtain 3.5mm thick strip blank.
⑵ rolling the strip blank by a four-roller reversible cold rolling mill, wherein the cold rolling deformation rate is about 45%, the cold rolling deformation rate between each softening annealing is controlled to be 30-45%, the intermediate softening annealing adopts a protective atmosphere continuous heat treatment furnace, and the heat treatment temperature is 1165-1230 ℃ until the strip blank is cold-rolled to the thickness of a finished product;
⑶ annealing the steel strip which is cold rolled to the finished product specification by a protective atmosphere continuous heat treatment furnace, wherein the annealing temperature is 950-980 ℃.
The invention has the following mechanism analysis and invention points:
the mechanical properties are modified by work hardening during plastic deformation of the metal: as the degree of deformation increases, the various plasticity indices (e.g., elongation, reduction of area, impact toughness, etc.) that determine plasticity decrease, and the various mechanical indices (e.g., proportional limit, elastic limit, yield point, strength, hardness, etc.) that determine resistance to deformation increase.
The recovery phenomenon is that the movement of atoms of the deformed metal is increased by heating the deformed metal, so that the thermal shock of the deformed metal is increased, all the atoms return to the position with the minimum potential energy, the distortion degree of crystal lattices is greatly reduced, the internal stress is reduced, the plasticity, the toughness and the elasticity are properly improved, and the properties of high strength and high hardness remained in the process of work hardening are reserved.
When the cold plastic deformation metal is heated to a higher temperature through solution treatment or annealing, the distortion crystal grains grow up through nucleation and crystal nucleus to form new distortion-free fine crystal grains, and the performance of the cold plastic deformation metal finished product can reach the indexes of high strength, high hardness and enough bending plasticity.
The invention has the advantages that the cold rolling deformation with the deformation rate of 30-45 percent is adopted, the continuous heat treatment furnace in the middle protective atmosphere adopts the heat treatment at the temperature of 1165-1230 ℃, the tissue and the performance of the GH5605 steel strip are ensured to be restored to the state before cold working, and the continuous cold rolling processing is convenient to continue; finally, cold rolling deformation is carried out to the specification of a finished product, the strength and the hardness of the GH5605 strip are improved and meet the indexes, the GH5605 strip is subjected to heat treatment recovery at 950-980 ℃ in a protective atmosphere continuous heat treatment furnace, and the capability of bearing bending plastic deformation is improved on the premise that the strength and the hardness are basically unchanged.
Compared with the prior art, the invention has the advantages that:
① at different production stages, cold working deformation process, intermediate softening annealing process and recovery heat treatment process are reasonably designed and adopted as required to ensure that the mechanical properties of the GH5605 hard high-temperature alloy cold-rolled strip are qualified, which can not be realized by the prior art (only cold working deformation and softening annealing traditionally).
② researches that the recovery temperature of GH5605 high-temperature alloy cold-rolled strip is 950 ℃ -980 ℃, and the capability of bearing bending plastic deformation can be improved under the premise that the strength and the hardness are basically unchanged by heat treatment at the temperature, which is the existing theoretical recovery temperature (0.25-0.3) TMelting Point(TMelting PointAbsolute temperature of the melting point of the metal).
Detailed Description
The details are described and illustrated below with reference to specific embodiments.
Example 1, example 2 and example 3:
⑴ smelting electrode blank in vacuum induction furnace, electroslag remelting in electroslag furnace, forging and cogging electroslag ingot, rolling in four-roller reversing hot mill, solid dissolving, and water milling to remove surface oxide skin to obtain 3.5mm thick strip blank.
⑵ cold rolling
①, the blank thickness is 3.5mm, the first cold rolling thickness is 1.9mm, the deformation rate is 45.7%, and the intermediate softening annealing and the cold rolling are carried out subsequently, the deformation rate of the intermediate cold rolling is 30% -45%;
⑷ inspection of finished products
① chemical constituents (%), carbon 0.07, silicon 0.07, manganese 1.59, phosphorus 0.010, sulfur 0.001, chromium 19.79, nickel 10.04, tungsten 14.43, iron 0.30, and cobalt the rest;
example 1
The specification of the finished product is 0.5mm multiplied by 95 mm;
⑵ cold rolling
② the rolling of the finished product is carried out by cold rolling the thickness of 0.8mm to 0.5mm, and the cold rolling deformation rate of the finished product is 37.5%.
⑶ heat treatment
① the intermediate softening annealing adopts a protective atmosphere continuous furnace, the annealing temperature is 1200 ℃, and the moving speed is 1 m/min-1.5 m/min;
② the finished strip with the thickness of 0.5mm is subjected to heat treatment by adopting a protective atmosphere continuous furnace, wherein the annealing temperature is 970 ℃, and the moving speed is 2.3 m/min.
⑷ inspection of finished products
②, the performance test shows that the tensile strength (MPa)1312/1311, the Hardness (HV)405/409 and the bending performance are qualified.
Example 2
The specification of the finished product is 0.25mm multiplied by 95 mm;
⑵ cold rolling
② the rolling of the finished product is carried out by cold rolling the thickness of 0.4mm to 0.25mm, and the cold rolling deformation rate of the finished product is 37.5%.
⑶ heat treatment
① the intermediate softening annealing adopts a protective atmosphere continuous furnace, the annealing temperature is 1200 ℃, and the moving speed is 1 m/min-2.2 m/min;
② the finished strip with the thickness of 0.25mm is subjected to heat treatment by adopting a protective atmosphere continuous furnace, wherein the annealing temperature is 970 ℃, and the moving speed is 2 m/min.
⑷ inspection of finished products
②, the performance test shows that the tensile strength (MPa)1342/1355, the Hardness (HV)415/411 and the bending performance are qualified.
Example 3
The specification of the finished product is 0.25mm multiplied by 95 mm;
⑵ cold rolling
② the rolling of the finished product is carried out by cold rolling the thickness of 0.4mm to 0.25mm, and the cold rolling deformation rate of the finished product is 37.5%.
⑶ heat treatment
① the intermediate softening annealing adopts a protective atmosphere continuous furnace, the annealing temperature is 1200 ℃, and the moving speed is 1 m/min-2.2 m/min;
② the finished strip with the thickness of 0.25mm is subjected to heat treatment by adopting a protective atmosphere continuous furnace, wherein the annealing temperature is 970 ℃, and the moving speed is 2 m/min.
⑷ inspection of finished products
②, the performance test shows that the tensile strength (MPa)1267/1304 and the Hardness (HV)422/41 have qualified bending performance.
Claims (3)
1. A heat treatment method of a hard GH5605 high-temperature alloy cold-rolled strip is characterized in that,
⑴ smelting electrode blank in vacuum induction furnace, electroslag remelting in electroslag furnace, forging and cogging electroslag ingot, rolling in four-roller reversing hot mill, and removing surface oxide skin by solid solution and water milling to obtain 3.5mm thick strip blank;
⑵ rolling the strip blank by a four-roller reversible cold rolling mill, wherein the cold rolling deformation rate is about 45%, the cold rolling deformation rate between each softening annealing is controlled to be 30-45%, the intermediate softening annealing adopts a protective atmosphere continuous heat treatment furnace, and the heat treatment temperature is 1165-1230 ℃ until the strip blank is cold-rolled to the thickness of a finished product;
⑶ annealing the steel strip which is cold rolled to the finished product specification by a protective atmosphere continuous heat treatment furnace, wherein the annealing temperature is 950-980 ℃.
2. The heat treatment method of the hard GH5605 superalloy cold-rolled strip according to claim 1, wherein the alloy is in a shape of a cylinder,
rolling by the cold rolling mill
①, the blank thickness is 3.5mm, the first cold rolling thickness is 1.9mm, the deformation rate is 45.7%, and the intermediate softening annealing and the cold rolling are carried out subsequently, the deformation rate of the intermediate cold rolling is 30% -45%;
② the rolling of the finished product is carried out by cold rolling the thickness of 0.8mm to 0.5mm, and the cold rolling deformation rate of the finished product is 37.5%;
the heat treatment
① the intermediate softening annealing adopts a protective atmosphere continuous furnace, the annealing temperature is 1200 ℃, and the moving speed is 1 m/min-1.5 m/min;
② the finished strip with the thickness of 0.5mm is subjected to heat treatment by adopting a protective atmosphere continuous furnace, wherein the annealing temperature is 970 ℃, and the moving speed is 2.3 m/min.
3. The heat treatment method of the hard GH5605 superalloy cold-rolled strip according to claim 1, wherein the alloy is in a shape of a cylinder,
rolling by the cold rolling mill
①, the blank thickness is 3.5mm, the first cold rolling thickness is 1.9mm, the deformation rate is 45.7%, and the intermediate softening annealing and the cold rolling are carried out subsequently, the deformation rate of the intermediate cold rolling is 30% -45%;
② the rolling of the finished product is carried out by cold rolling the thickness of 0.4mm to 0.25mm, and the cold rolling deformation rate of the finished product is 37.5%;
the heat treatment
① the intermediate softening annealing adopts a protective atmosphere continuous furnace, the annealing temperature is 1200 ℃, and the moving speed is 1 m/min-2.2 m/min;
② the finished strip with the thickness of 0.25mm is subjected to heat treatment by adopting a protective atmosphere continuous furnace, wherein the annealing temperature is 970 ℃, and the moving speed is 2 m/min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310721749.4A CN116904892A (en) | 2020-03-06 | 2020-03-06 | Hard GH5605 superalloy cold-rolled strip |
| CN202010149106.3A CN111304566B (en) | 2020-03-06 | 2020-03-06 | Heat treatment method of hard GH5605 superalloy cold-rolled strip |
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| CN202010149106.3A CN111304566B (en) | 2020-03-06 | 2020-03-06 | Heat treatment method of hard GH5605 superalloy cold-rolled strip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088448A (en) * | 2019-12-25 | 2020-05-01 | 北京北冶功能材料有限公司 | Cobalt-based high-temperature alloy strip foil and preparation method thereof |
| CN112474821A (en) * | 2020-10-29 | 2021-03-12 | 江苏延汉材料科技有限公司 | Method for controlling plate shape of martensitic stainless steel thin strip |
| CN113953317A (en) * | 2021-08-30 | 2022-01-21 | 江苏圣珀新材料科技有限公司 | Cold rolling preparation process of nickel-based alloy strip |
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- 2020-03-06 CN CN202310721749.4A patent/CN116904892A/en active Pending
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| US20160097115A1 (en) * | 2010-09-16 | 2016-04-07 | Seiko Instruments Inc. | Method of Producing Co-Ni-Based Alloy |
| CN106636762A (en) * | 2016-12-30 | 2017-05-10 | 江苏鑫信润科技有限公司 | High-performance cobalt-based high-temperature alloy brush wire material |
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| CN113953317A (en) * | 2021-08-30 | 2022-01-21 | 江苏圣珀新材料科技有限公司 | Cold rolling preparation process of nickel-based alloy strip |
| CN113953317B (en) * | 2021-08-30 | 2024-02-13 | 江苏圣珀新材料科技有限公司 | Cold rolling preparation process of nickel-based alloy strip |
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| CN116904892A (en) | 2023-10-20 |
| CN111304566B (en) | 2023-06-02 |
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