CN110331352B - Radial forging method for controlling distribution of carbide of nickel-based alloy - Google Patents
Radial forging method for controlling distribution of carbide of nickel-based alloy Download PDFInfo
- Publication number
- CN110331352B CN110331352B CN201910770541.5A CN201910770541A CN110331352B CN 110331352 B CN110331352 B CN 110331352B CN 201910770541 A CN201910770541 A CN 201910770541A CN 110331352 B CN110331352 B CN 110331352B
- Authority
- CN
- China
- Prior art keywords
- forging
- nickel
- based alloy
- temperature
- radial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The invention provides a radial forging method for controlling distribution of nickel-based alloy carbide, which comprises the following steps: (1) preparing a nickel-based alloy ingot; (2) heating a nickel-based alloy ingot to a preset temperature, and preserving heat at the preset temperature for a preset time to perform heating treatment; (3) casting a heat-treated nickel-based alloy into an ingotPerforming n-number of pass diameter forging, wherein n is an integer greater than 1; wherein the finish forging temperature of the radial forging of the nth pass is equal to the forging ratio of the radial forging of the nth pass0.12The final forging temperature of the radial forging of the previous n-1 passes is multiplied. The radial forging method can realize the chain rating of the carbonitride strips to be less than or equal to level 1.
Description
Technical Field
The invention belongs to the field of metallurgy, and particularly relates to a forging method of a nickel-based alloy, in particular to a radial forging method for controlling distribution of carbides of the nickel-based alloy.
Background
The nickel-based alloy has wide application in the fields of petrochemical industry, aerospace and energy sources due to the excellent performance, and the product forms relate to rods, tubes, plates, wires and the like. The production of nickel-based alloys is also increasing to meet the demands of industrial development. The nickel-based alloy has a great deal of strong precipitation alloying elements, so that the control of carbide distribution is always difficult.
The tube blank and the bar which are processed again in the later period of the nickel-based alloy can be produced by adopting a radial forging mode. The radial forging process has the greatest advantages that the overall dimension can be accurately controlled, the production efficiency is high, and the radial forging process is an advanced forging technology at present. However, the forging time is long because the deformation amount per pass of the radial forging is small. Under the condition of high forging ratio, the material is difficult to be formed by one-time heating, the finish forging temperature is difficult to be ensured, and the forging is carried out again after soaking and tempering. Due to multiple thermal cycle-deformation, the internal structure and carbide are difficult to control effectively, the carbide is often distributed in a chain or aggregation state, and the distributed carbide is a potential crack source in the later pipe and wire production process and must be avoided.
Disclosure of Invention
The invention aims to provide a radial forging method for controlling the carbide distribution of a nickel-based alloy, aiming at the defects in the prior art.
Specifically, the invention is realized by the following technical scheme:
a radial forging method for controlling the distribution of nickel-based alloy carbides comprises the following steps:
(1) preparing a nickel-based alloy ingot;
(2) heating a nickel-based alloy ingot to a preset temperature, and preserving heat at the preset temperature for a preset time to perform heating treatment;
(3) carrying out n-pass diameter forging on the nickel-based alloy ingot subjected to the heating treatment, wherein n is an integer greater than 1; wherein the finish forging temperature of the radial forging of the nth pass is equal to the forging ratio of the radial forging of the nth pass, and is 0.12 multiplied by the finish forging temperature of the radial forging of the first n-1 passes.
Further, in the step (1), a nickel-based alloy ingot is prepared by adopting a method of vacuum induction smelting and electroslag remelting or a method of vacuum induction smelting and vacuum self-consumption.
Further, in the step (2),
further, in step (2), the preset temperature is determined by a PTT phase diagram.
Further, in the step (3), the forging ratio of the n-th pass of the radial forging is 1.2 to 1.6.
Further, in step (3), the finish forging temperature of the first n-1 passes of the radial forging is determined by a PTT phase diagram.
Further, in step (3), the total forging ratio is greater than 4.
Further, in step (3), n is 3.
A nickel-based alloy is obtained by adopting the radial forging method.
Further, the chain rating of the carbonitride bars of the nickel-based alloy is less than or equal to grade 1.
Compared with the prior art, the technical scheme of the invention at least has the following beneficial effects:
the radial forging method for controlling the carbide distribution of the nickel-based alloy can realize effective control on the carbide distribution of the nickel-based alloy, eliminate the chain-shaped and aggregation-state distribution of the carbide, and achieve the technical effect that the chain-shaped rating of the carbonitride of the nickel-based alloy is less than or equal to level 1.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.
Aiming at the problems that the internal structure and carbide are difficult to effectively control and the carbide is frequently distributed in a chain shape or an aggregation state due to multiple thermal cycle-deformation in the production process of the nickel-based alloy at present, the inventor of the invention improves a radial forging method from five aspects of heating temperature, heat preservation time, process finish forging temperature, the forging ratio of the last pass and the finish forging temperature of the last pass through research, thereby providing the radial forging method for controlling the distribution of the carbide of the nickel-based alloy, eliminating the chain shape and aggregation state distribution of the carbide, and avoiding the problem that the carbide distributed in the way can become a potential crack source in the production process of later-stage pipe making and wire rods.
In a preferred embodiment, the radial forging method for controlling the carbide distribution of the nickel-based alloy comprises the following steps:
(1) preparation of nickel-base alloy ingot
The nickel-based alloy ingot can be prepared by a VIM + ESR (vacuum induction melting + electroslag remelting) method or a VIM + VAR (vacuum induction melting + vacuum consumable electrode) method. Vacuum induction smelting, electroslag remelting and vacuum consumable are known methods in the field, and in actual production, a person skilled in the art can reasonably select required equipment and process conditions according to actual needs, and details are not described herein. During this process, the PTT (precipitation-temperature-time) phase diagram of the as-forged nickel-base alloy was determined in order to determine a reasonable forging temperature control range. Among them, the PTT phase diagram can be obtained from existing literature, for example, john N dupont nickel base alloy weld metallurgy and weldability shanghai science and technology literature press, 5 months and 1 days 2014.
(2) Heat treatment of
And heating the nickel-based alloy ingot to a preset temperature, and preserving heat at the preset temperature for a preset time to perform heating treatment. Wherein the preset temperature (i.e. the heating temperature) preferably adopts the forging temperature range determined according to the PTT phase diagram in the step (1); preset timeThe (i.e., holding time) is preferably determined according to the diameter of the nickel-base alloy ingot, and, in particular,
(3) radial forging treatment
And (3) performing multiple radial forging (n passes, wherein n is an integer greater than 1) on the heat-treated nickel-base alloy ingot, wherein the total forging ratio (namely the initial section area of the ingot/the section area of the finished product) of the radial forging is ensured to be greater than 4. For the nickel-based alloy, the total forging ratio is more than 4, so that the core of the cast ingot can be completely forged, the as-cast structure is broken, and complete dynamic recrystallization occurs. And the larger the forging ratio, the finer and more uniform the crystal grains.
In this step, the finish forging temperature (i.e., the process finish forging temperature) of the first n-1 passes of the radial forging is preferably determined by the PTT phase diagram in step (1).
In this step, the forging ratio of the radial forging of the nth pass (i.e., the forging ratio of the last pass) is preferably 1.2 to 1.6.
In this step, since the precipitates have strain-induced precipitation behavior and the precipitation temperature of the precipitates is higher than the equilibrium precipitation temperature during forging, the finish forging temperature of the radial forging of the nth pass (i.e., the finish forging temperature of the last pass) is preferably determined based on the forging ratio of the radial forging of the nth pass and the finish forging temperature of the radial forging of the first n-1 passes, that is, the finish forging temperature of the radial forging of the nth pass is equal to the finish forging temperature of the radial forging of the first n-1 passes, i.e., the forging ratio of the radial forging of the nth pass is 0.12 × the finish forging temperature of the radial forging of the first n-1 passes.
In this step, the heat-treated nickel-base alloy ingot is preferably subjected to three-pass radial forging (n ═ 3).
In the present invention, the inventors improved the radial forging method in five respects of heating temperature, holding time, process finish forging temperature, forging ratio of the last pass, and finish forging temperature of the last pass.
In particular, the heating temperature is extremely important for hot working of nickel-based alloys, and if the heating temperature is too high, the alloy is over-sintered, grain boundaries are embrittled, and the alloy is directly cracked during deformation. If the heating temperature is too low, on the one hand, the precipitates cannot be effectively redissolved and are unfavorable for final performance, and on the other hand, the deformation resistance is too high, and the forging is easy to crack. The heat preservation time has great influence on the forging process, the heat preservation time is too long, the oxidation loss of the alloy is increased, and the surface of the cast ingot is easy to generate micro cracks. If the heat preservation time is too short, the temperature difference between the inside and the outside of the cast ingot exists, cracking occurs during forging, and precipitates are not uniformly distributed in the section direction, so that the service performance is influenced. The reasonable selection of the finish forging temperature in the process can ensure that the surface of the forging stock does not generate forging cracks and precipitates are not generated in the forging stock. As the forging process is returned, the tissues can be statically recrystallized and grown, and the forging ratio of the last pass can homogenize the tissues. Since strain energy is accumulated in the forging in a plurality of passes and the precipitation temperature of precipitates becomes higher than the equilibrium precipitation temperature, the finish forging temperature in the final pass is raised to control the precipitation of carbides. According to the invention, the heating temperature, the heat preservation time, the process finish forging temperature, the last-pass forging ratio and the last-pass finish forging temperature are adopted, and under the matching action of the 5 parameters, the carbide distribution of the nickel-based alloy is effectively controlled, and the chain-like and aggregation-state distribution of carbide strips is eliminated.
Examples
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
(1) Preparation of nickel-base alloy ingot
The nickel-based alloy ingot is prepared by adopting VIM and ESR processes, namely a vacuum induction smelting and electroslag remelting process. The prepared nickel-based alloy cast ingot comprises the following main components in percentage by mass: ni base, 22% Cr, 9% Mo and 3.8% Nb. The diameter of the prepared nickel base alloy ingot is 600mm, namely the initial size of the ingot is 600 mm.
(2) Heat treatment of
Feeding the nickel-based alloy ingot prepared in the step (1) into a heating furnace, heating to a preset temperature, and preserving heat at the preset temperature for a preset time, wherein the preset temperature isIs 1180 ℃ and the preset time is
(3) Radial forging treatment
And (4) outputting the nickel-based alloy cast ingot from the heating furnace, and feeding the nickel-based alloy cast ingot into a radial forging machine for 3-time radial forging treatment. The temperature of the returned furnace after the first and second hot forging is finished is 1180 ℃, and the temperature of the final forging is 930 ℃. The first hot forging specification is phi 420mm, and the time of returning to the furnace and holding the temperature is 126 min. The second fire forging specification is phi 280mm, and the time of returning to the furnace and holding the temperature is 80 min.
Since the total forging ratio in this step was 6.8 and the finish forging size was 230mm, the forging ratio in the third heat was 280/230-1.48 and the finish forging temperature (. degree. C.) was 1.480.12X 930 (deg.c) 975 deg.c, and water-cooled after forging.
The chain-shaped carbonitride is detected to be 0.5 grade by referring to the grade standard of B-type inclusion in GB/T10561.
Example 2
(1) Preparation of nickel-base alloy ingot
Preparing the nickel-based alloy ingot by adopting a VIM + VAR process, namely a vacuum induction smelting and vacuum self-consuming process. The prepared nickel-based alloy cast ingot comprises the following main components in percentage by mass: ni base, 22% Cr, 9% Mo and 3.8% Nb. The diameter of the prepared nickel base alloy ingot is 600mm, namely the initial size of the ingot is 600 mm.
(2) Heat treatment of
Feeding the nickel-based alloy ingot prepared in the step (1) into a heating furnace, heating to a preset temperature, and preserving heat at the preset temperature for a preset time, wherein the preset temperature is 1180 ℃, and the preset time is
(3) Radial forging treatment
And (4) outputting the nickel-based alloy cast ingot from the heating furnace, and feeding the nickel-based alloy cast ingot into a radial forging machine for 3-time radial forging treatment. The temperature of the returned furnace after the first and second hot forging is finished is 1180 ℃, and the temperature of the final forging is 940 ℃. The first hot forging specification is 400mm phi, and the time of returning to the furnace and holding the temperature is 120 min. The second fire forging specification is 250mm phi, and the time of returning to the furnace and holding the temperature is 69 min.
Since the total forging ratio in this step was 8.16 and the finish forging size was 210mm, the forging ratio in the third heat was 250/210-1.41 and the finish forging temperature (. degree. C.) was 1.410.12X 940 (deg.c) 969 ℃, and water cooling after forging.
The chain-shaped carbonitride is detected to be 0.5 grade by referring to the grade standard of B-type inclusion in GB/T10561.
Example 3
(1) Preparation of nickel-base alloy ingot
The nickel-based alloy ingot is prepared by adopting VIM and ESR processes, namely a vacuum induction smelting and electroslag remelting process. The prepared nickel-based alloy cast ingot comprises the following main components in percentage by mass: ni base, 22% Cr, 9% Mo and 3.8% Nb. The diameter of the prepared nickel base alloy ingot is 600mm, namely the initial size of the ingot is 600 mm.
(2) Heat treatment of
Feeding the nickel-based alloy ingot prepared in the step (1) into a heating furnace, heating to a preset temperature, and preserving heat at the preset temperature for a preset time, wherein the preset temperature is 1180 ℃, and the preset time is
(3) Radial forging treatment
And (4) outputting the nickel-based alloy cast ingot from the heating furnace, and feeding the nickel-based alloy cast ingot into a radial forging machine for 3-time radial forging treatment. The temperature of the returned furnace after the first and second hot forging is finished is 1180 ℃, and the temperature of the final forging is 940 ℃. The first hot forging specification is 400mm phi, and the time of returning to the furnace and holding the temperature is 120 min. The second fire forging specification is phi 245mm, and the time of returning to the furnace and holding the temperature is 68 min.
The total forging ratio of the step is9.46, since the finish forging size was 195mm, the forging ratio at the third heat was 245/195-1.58, and the finish forging temperature (. degree. C.) was 1.580.12X 940 (deg.c) 982 ℃, water cooling after forging.
The chain-shaped carbonitride is detected to be 0.5 grade by referring to the grade standard of B-type inclusion in GB/T10561.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other substitutions, modifications, combinations, changes, simplifications, etc., which are made without departing from the spirit and principle of the present invention, should be construed as equivalents and included in the protection scope of the present invention.
Claims (6)
1. A radial forging method for controlling the distribution of nickel-based alloy carbide is characterized by comprising the following steps:
(1) preparing a nickel-based alloy ingot;
(2) heating a nickel-based alloy ingot to a preset temperature, and preserving heat at the preset temperature for a preset time to perform heating treatment;
(3) carrying out n-pass diameter forging on the nickel-based alloy ingot subjected to the heating treatment, wherein n is an integer greater than 1; wherein the finish forging temperature of the radial forging of the nth pass = the forging ratio of the radial forging of the nth pass0.12The finish forging temperature of the radial forging of n-1 passes before the time is multiplied;
wherein, in the step (2),
；
in step (3), n is 3.
2. The radial forging method according to claim 1, wherein in the step (1), the nickel-based alloy ingot is prepared by a vacuum induction smelting and electroslag remelting method or a vacuum induction smelting and vacuum self-consuming method.
3. The radial forging method according to claim 1, wherein in the step (2), the preset temperature is determined by a PTT phase diagram.
4. The radial forging method according to claim 1, wherein in the step (3), the forging ratio of the radial forging of the nth pass is 1.2 to 1.6.
5. The radial forging method according to claim 1, wherein in step (3), the finish forging temperature of the radial forging of the first n-1 passes is determined by a PTT phase diagram.
6. The radial forging method as recited in claim 1, wherein in the step (3), the total forging ratio is more than 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770541.5A CN110331352B (en) | 2019-08-20 | 2019-08-20 | Radial forging method for controlling distribution of carbide of nickel-based alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770541.5A CN110331352B (en) | 2019-08-20 | 2019-08-20 | Radial forging method for controlling distribution of carbide of nickel-based alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331352A CN110331352A (en) | 2019-10-15 |
| CN110331352B true CN110331352B (en) | 2020-11-03 |
Family
ID=68149976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770541.5A Active CN110331352B (en) | 2019-08-20 | 2019-08-20 | Radial forging method for controlling distribution of carbide of nickel-based alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110331352B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275796B (en) * | 2020-09-03 | 2023-03-24 | 太原钢铁(集团)有限公司 | Method for improving rolling surface quality of nickel-based alloy wire |
| CN112176266B (en) * | 2020-09-04 | 2022-01-18 | 北京科技大学 | Control method of GH4105 nickel-based alloy carbide strip structure |
| CN112877627B (en) * | 2021-01-12 | 2022-04-26 | 山西太钢不锈钢股份有限公司 | Ni-Cr-Fe alloy bar forging heat treatment method and Ni-Cr-Fe alloy bar |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492906B (en) * | 2011-12-29 | 2013-04-24 | 钢铁研究总院 | Forging method of high-temperature alloy fine-grained bars |
| CN103993202B (en) * | 2014-05-20 | 2016-03-30 | 太原钢铁(集团)有限公司 | A kind of ultra supercritical station boiler tubing nickel-base alloy and preparation method |
| JP6663575B2 (en) * | 2017-05-31 | 2020-03-13 | 日立金属株式会社 | Manufacturing method of Ni-base super heat-resistant alloy |
| CN107245683B (en) * | 2017-06-08 | 2018-09-04 | 太原钢铁(集团)有限公司 | Nickel-base alloy diameter forges organizational controls method |
| CN110548827B (en) * | 2018-05-31 | 2021-11-12 | 宝武特种冶金有限公司 | Forging method for improving yield of nickel-based corrosion-resistant alloy forging stock |
-
2019
- 2019-08-20 CN CN201910770541.5A patent/CN110331352B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110331352A (en) | 2019-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021174727A1 (en) | Method for preparing nickel-based deformed high-temperature alloy turbine disk forging for high temperature use | |
| JP6422045B1 (en) | Ni-base superalloy and manufacturing method thereof | |
| CN110331352B (en) | Radial forging method for controlling distribution of carbide of nickel-based alloy | |
| JP5299610B2 (en) | Method for producing Ni-Cr-Fe ternary alloy material | |
| CN111225990B (en) | Method for producing a nickel-base alloy | |
| JP6150192B2 (en) | Method for producing Ni-base superalloy | |
| CN114032481B (en) | Method for homogenizing high-alloying high-temperature alloy material | |
| US10260137B2 (en) | Method for producing Ni-based superalloy material | |
| US10344367B2 (en) | Method for producing Ni-based superalloy material | |
| US20200377987A1 (en) | Method for manufacturing super-refractory nickel-based alloy and super-refractory nickel-based alloy | |
| JP2014520206A5 (en) | ||
| CN102439191A (en) | Method for producing a piece made from a superalloy based on nickel and corresponding piece | |
| CN103952594B (en) | A kind of preparation method of nickel chromium triangle system multi-element high-resistance electrothermal alloy | |
| JP6571103B2 (en) | Nickel-based alloys, methods and uses | |
| CN110541090B (en) | Method for improving corrosion performance of nickel-based alloy | |
| JP7375489B2 (en) | Manufacturing method of Ni-based heat-resistant alloy material | |
| CN112496037B (en) | Nickel-based alloy plate rolling method | |
| TWI675921B (en) | Nickel-based austenitic alloy and method of forming the same | |
| JP6185347B2 (en) | Intermediate material for splitting Ni-base superheat-resistant alloy and method for producing the same, and method for producing Ni-base superheat-resistant alloy | |
| JPH09217149A (en) | Large-sized casting and forging, made of duplex stainless steel excellent in corrosion resistance and toughness, and their production | |
| TWI557244B (en) | Method of fabricating corrosion-resistant high nickel alloy | |
| CN117248150A (en) | Method for improving mechanical properties of Fe-22Cr-25Ni austenitic heat-resistant steel through crystal boundary engineering treatment | |
| JPH04191353A (en) | Production of ni-base heat resisting alloy stock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Applicant after: TAIYUAN IRON & STEEL (GROUP) Co.,Ltd. Address before: 030003 Taiyuan science and technology center, Shanxi 2 Applicant before: TAIYUAN IRON & STEEL (GROUP) Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |