CN105369022A - Method for carrying out grain refinement on 2Cr12NiMo1W1V forge piece in production process - Google Patents
Method for carrying out grain refinement on 2Cr12NiMo1W1V forge piece in production process Download PDFInfo
- Publication number
- CN105369022A CN105369022A CN201510732382.1A CN201510732382A CN105369022A CN 105369022 A CN105369022 A CN 105369022A CN 201510732382 A CN201510732382 A CN 201510732382A CN 105369022 A CN105369022 A CN 105369022A
- Authority
- CN
- China
- Prior art keywords
- forging
- forge piece
- carries out
- production
- thermal treatment
- 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.)
- Granted
Links
Classifications
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to a method for carrying out grain refinement on a steel forge piece in the production process, in particular to a method for carrying out grain refinement on a 2Cr12NiMo1W1V forge piece in the production process. The method aims at solving the problems that coarse grains are generated in the forging process of the 2Cr12NiMo1W1V steel forge piece, grain refinement cannot be carried out in the subsequent thermal treatment process, and adverse effects on the product performance will be caused due to repeated thermal treatment. A 2Cr12NiMo1W1V steel forge piece thermal treatment process is provided, a product in which coarse grains are possibly generated in the final procedure of the forge piece forging process is subjected to thermal treatment, and it can be guaranteed that after the 2Cr12NiMo1W1V steel forge piece is subjected to primary thermal treatment, the grain size of the 2Cr12NiMo1W1V steel forge piece meets the standard requirement. The grain refinement method is used for a thermal treatment method for carrying out grain refinement on a steel forge piece in the production process.
Description
Technical field
The present invention relates to a kind of steel forgings carries out grain refining heat treating method in production process.
Background technology
2Cr12NiMo1W1V steel belongs to modified version 12%Cr steel, because this steel series hardening capacity is good, and with the addition of W, V, Mo alloying element, is widely used in the forging such as steam turbine valve disc, lining.In factory's actual production process, extensively occur coarse grains problem, and mostly be mixed crystal, be less than 1 grade of crystal grain and reach 20%, all the other crystal grain are below 3 grades, and technological standard general requirement more than 4 grades or 4 grades.Because this steel grade hardening capacity is strong, Structure Inheritance feature is obvious, and traditional technique exists steel forgings and occurs coarse-grain after forging, and subsequent heat treatment cannot carry out grain refining, and owing to repeatedly repeating thermal treatment, can impact product performance.
Summary of the invention
The object of the invention is in forging process, to occur coarse-grain in order to solving 2Cr12NiMo1W1V steel forgings, subsequent heat treatment cannot carry out grain refining and owing to repeatedly repeating thermal treatment, the problem of disadvantageous effect can be caused to product performance, provide a kind of 2Cr12NiMo1W1V steel forgings thermal treatment process, in the final program of workpiece forging process, may occur that the product of coarse-grain is heat-treated, can ensure that 2Cr12NiMo1W1V steel forgings is by after a thermal treatment, its grain fineness number reaches standard-required.
The method that 2Cr12NiMo1W1V forging of the present invention carries out grain refining is in process of production carried out by the following method:
Normalizing treatment is carried out at 980 DEG C ~ 1020 DEG C after being annealed by the 2Cr12NiMo1W1V forging of production process; Then load furnace temperature not higher than in the process furnace of 200 DEG C, be warming up to 850 DEG C ~ 880 DEG C with process furnace, after insulation 2h ~ 4h, stove is chilled to 150 DEG C ± 10 DEG C, then carries out air cooling to normal temperature; Then when stove to be heated is warming up to 1040 DEG C ± 10 DEG C, oil cooling is carried out to room temperature, 690 DEG C ± 10 DEG C temper.
The present invention is relative to its advantage of prior art:
1. by crystal fining method of the present invention by after occurring after property heat treatment that the forging of coarse-grain problem processes, can effectively this forging of refinement grain fineness number and its grain fineness number reaches 5.5 grades, meet the technical standards requirement.
2., after can ensureing that steel forgings passes through a thermal treatment by crystal fining method of the present invention, its grain fineness number reaches standard-required.Prevent from, owing to repeatedly repeating thermal treatment, causing disadvantageous effect to product performance.
Accompanying drawing explanation
Fig. 1 is the SEM figure of metallographic structure after the steam turbine 2Cr12NiMo1W1V lining forging normative heat treatment of embodiment 1 forging.
Fig. 2 is that after the steam turbine 2Cr12NiMo1W1V lining forging of embodiment 1 forging adopts thermal treatment process of the present invention, the SEM of metallographic structure schemes.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: a kind of 2Cr12NiMo1W1V forging of present embodiment carries out the method for grain refining in production process, is characterized in that the method that this 2Cr12NiMo1W1V forging carries out grain refining in production process is carried out by the following method:
Normalizing treatment is carried out at 980 DEG C ~ 1020 DEG C after being annealed by the 2Cr12NiMo1W1V forging of production process; Then load furnace temperature not higher than in the process furnace of 200 DEG C, be warming up to 850 DEG C ~ 880 DEG C with process furnace, insulation 2h ~ 4h, stove is chilled to 150 DEG C ± 10 DEG C, then carries out air cooling to normal temperature; Then when stove to be heated is warming up to 1040 DEG C ± 10 DEG C, oil cooling is carried out to room temperature, 690 DEG C ± 10 DEG C temper.
Embodiment two: present embodiment and embodiment one unlike, the temperature of normalizing treatment is 1000 DEG C.Other steps are identical with embodiment one with parameter.
Embodiment three: present embodiment and embodiment one unlike, then loading furnace temperature is in the process furnace of 200 DEG C.Other steps are identical with embodiment one with parameter.
Embodiment four: present embodiment and embodiment one unlike, first time process furnace rise to 855 DEG C.Other steps are identical with embodiment one with parameter.
Embodiment five: present embodiment and embodiment one unlike, soaking time is 3h.Other steps are identical with embodiment one with parameter.
Embodiment six: present embodiment and embodiment one are unlike, the temperature to 150 DEG C that stove is cold.Other steps are identical with embodiment one with parameter.
Embodiment seven: present embodiment and embodiment one unlike, second time process furnace rises to 1040 DEG C.Other steps are identical with embodiment one with parameter.
Embodiment eight: present embodiment and embodiment one unlike, the temperature of temper is 690 DEG C.Other steps are identical with embodiment one with parameter.
Embodiment 1:
A kind of steam turbine 2Cr12NiMo1W1V lining forging, forging in the process of forging after annealing 1000 DEG C carry out normalizing treatment; Then load in the process furnace of furnace temperature 200 DEG C, be warming up to 855 DEG C with process furnace, be incubated 3 hours, stove is chilled to 150 DEG C, then carries out air cooling to normal temperature; 1040 DEG C of oil coolings are warming up to room temperature, 690 DEG C of temper with process furnace.
Fig. 1 shows that the grain fineness number of the 2Cr12NiMo1W1V lining forging of normative heat treatment explained hereafter is 2 grades.Fig. 2 shows that the grain fineness number of the 2Cr12NiMo1W1V lining forging that the present embodiment is produced is 5.5 grades, other room temperature Mechanical test results: Rp0.2 are 833MPa, Rm be 952MPa, A is 19.5%, Z is 53%, HB be 306 and AKU be 25, performance all reaches standard-required.
Claims (8)
1. 2Cr12NiMo1W1V forging carries out a method for grain refining in process of production, it is characterized in that: the method that this 2Cr12NiMo1W1V forging carries out grain refining is in process of production carried out by the following method:
Normalizing treatment is carried out at 980 DEG C ~ 1020 DEG C after being annealed by the 2Cr12NiMo1W1V forging of production process; Then load furnace temperature not higher than in the process furnace of 200 DEG C, be warming up to 850 DEG C ~ 880 DEG C with process furnace, insulation 2h ~ 4h, stove is chilled to 150 DEG C ± 10 DEG C, then carries out air cooling to normal temperature; Then be warming up to 1040 DEG C ± 10 DEG C with process furnace, then carry out oil cooling to room temperature, 690 DEG C ± 10 DEG C temper.
2. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: the temperature of normalizing treatment is 1000 DEG C.
3. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: then loading furnace temperature is in the process furnace of 200 DEG C.
4. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: process furnace rises to 855 DEG C for the first time.
5. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: soaking time is 3h.
6. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: the temperature to 150 DEG C that stove is cold.
7. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: second time process furnace rises to 1040 DEG C.
8. a kind of 2Cr12NiMo1W1V forging according to claim 1 carries out the method for grain refining in process of production, it is characterized in that: the temperature of temper is 690 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510732382.1A CN105369022B (en) | 2015-11-02 | 2015-11-02 | A kind of method that 2Cr12NiMo1W1V forging carries out crystal grain refinement in process of production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510732382.1A CN105369022B (en) | 2015-11-02 | 2015-11-02 | A kind of method that 2Cr12NiMo1W1V forging carries out crystal grain refinement in process of production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105369022A true CN105369022A (en) | 2016-03-02 |
| CN105369022B CN105369022B (en) | 2017-06-23 |
Family
ID=55371648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510732382.1A Active CN105369022B (en) | 2015-11-02 | 2015-11-02 | A kind of method that 2Cr12NiMo1W1V forging carries out crystal grain refinement in process of production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105369022B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119479A (en) * | 2016-08-31 | 2016-11-16 | 无锡派克新材料科技股份有限公司 | A kind of method for annealing improving 13Cr9Mo2Co1NiVNbNB grain size |
| CN106119469A (en) * | 2016-06-30 | 2016-11-16 | 山东伊莱特重工股份有限公司 | A kind of Technology for Heating Processing of large forgings crystal grain thinning |
| CN112760465A (en) * | 2020-12-22 | 2021-05-07 | 佳木斯大学 | Heat treatment method for 410 stainless steel |
-
2015
- 2015-11-02 CN CN201510732382.1A patent/CN105369022B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119469A (en) * | 2016-06-30 | 2016-11-16 | 山东伊莱特重工股份有限公司 | A kind of Technology for Heating Processing of large forgings crystal grain thinning |
| CN106119479A (en) * | 2016-08-31 | 2016-11-16 | 无锡派克新材料科技股份有限公司 | A kind of method for annealing improving 13Cr9Mo2Co1NiVNbNB grain size |
| CN112760465A (en) * | 2020-12-22 | 2021-05-07 | 佳木斯大学 | Heat treatment method for 410 stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105369022B (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103343200B (en) | Short-process thermal treatment method of large 35CrNi3MoV steel forgings | |
| CN108559934B (en) | Cryogenic treatment process for TC6 titanium alloy forging | |
| CN109252120B (en) | Method for uniformly refining GH4169 alloy forging structure | |
| CN105385822A (en) | Thermal treatment method for breaking large P91/P92 material forged piece structure inheritance and refining grains | |
| CN106119495B (en) | A kind of manufacturing method of cold rolling medium high carbon structural steel | |
| CN103320597A (en) | Method for refining coarse grain of 10Cr9Mo1VNbN steel pipe and forged piece | |
| CN105714042A (en) | Steel casting heat treatment technology | |
| CN105369022A (en) | Method for carrying out grain refinement on 2Cr12NiMo1W1V forge piece in production process | |
| CN116411231A (en) | Grain refinement method for free forging nickel-based superalloy | |
| CN105734249A (en) | Method for refining grain size of large 1Cr11Ni2W2MoV shaft forge pieces | |
| CN107190130A (en) | A kind of engine shroud Technology for Heating Processing | |
| CN102643975A (en) | Heat treatment method for grain refinement of NiCrMoV steel forging piece | |
| CN105648172A (en) | Heat treatment process method for 0Cr13Ni8Mo2Al steel | |
| CN103627858A (en) | Heat treatment technology of martensite stainless steel workpiece | |
| CN107964578A (en) | A kind of automobile die steel processing technology | |
| CN106086374A (en) | One utilizes residual forging heat to carry out the most isothermal annealed rolling stock axletree Technology for Heating Processing | |
| CN105369023A (en) | Method for refining grains of 2Cr12NiMo1W1V forge piece | |
| CN102634646B (en) | Special temperature-control cooling thermal treatment technology | |
| CN102220459B (en) | Heat process capable of lowering ductile-brittle transition temperature and intergranular fracture ratio of turbine blades | |
| CN104099456A (en) | Forging and heat treatment method of 9Cr18MoV steel forging | |
| CN104087737A (en) | Heat treatment method of long-shaft forging made of steel 34CrNi3Mo | |
| CN115927805B (en) | Heat treatment method for improving grain size of 10Cr11Co3W3NiMoVNbNB martensitic stainless steel forging | |
| CN103614521B (en) | Medium carbon steel material large diesel engine output shaft tempering process | |
| CN108441617A (en) | A kind of conditioning treatment method of 30Cr2Ni4MoV steel low pressure rotor | |
| CN106086734A (en) | The forging method of 2618A aluminum alloy impeller forging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221227 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |
|
| TR01 | Transfer of patent right |