CN109022729A - A kind of high temperature diffusion process for forging - Google Patents
A kind of high temperature diffusion process for forging Download PDFInfo
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- CN109022729A CN109022729A CN201811053848.5A CN201811053848A CN109022729A CN 109022729 A CN109022729 A CN 109022729A CN 201811053848 A CN201811053848 A CN 201811053848A CN 109022729 A CN109022729 A CN 109022729A
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
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- 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 high temperature diffusion process for forging of design of the invention, comprising the following steps: workpiece to be added is warming up to 1240 DEG C ± 10 DEG C according to using the different heating rate of multistage, and keeps the temperature a period of time by S1；S2 takes out workpiece to be added and starts to pull out forging workpiece to be added after being performed in multiple times first pier；It all melts down after each pulling before completing forging and is forged next time again after keeping the temperature a period of time at a certain temperature；S3, last time are machined to forging's block dimension after keeping the temperature.The present invention is using High temperature diffusion twice, heat preservation and S2 last time in S1 are kept the temperature, time extension improves diffusion effect, long-time heat preservation at high temperature, be conducive to the diffusion of alloying element, have the function that improve segregation, while the cross-sectional dimension of the workpiece to be added of the High temperature diffusion of last time is less than original workpiece to be added in S2, diffusion effect is more preferable than first time diffusion effect.
Description
Technical field
The invention belongs to technical field of forging, the high temperature diffusion process of specifically a kind of idiom forging.
Background technique
In heat treatment, diffusion annealing (homogenizing annealing) is commonly used dendritic segregation is mitigated or eliminated；In heavy forging industry,
Dendritic segregation can be mitigated or eliminated by diffusion annealing before forging in steel ingot, improve the distribution of chemical component, to improve the heat of steel ingot
Processing performance, and finally improve the quality of forging.For a long time, due to diffusion annealing before forging technique lack it is relatively specific theoretical according to
According to, domestic enterprise when formulating the technological parameter, can document for reference it is little, cause the determination of technological parameter more conservative.So
And heating temperature is excessively high or soaking time is too long will all to consume mass energy, increase cost, or even influences forging performance, drop
Low yield quality.
Hot die steel, such as HDMA alloy content are high, and the addition of a large amount of alloying element moves to left eutectoid point, belonged to
The effect of the macrosegregation of eutectoid steel, carbon and alloying element, especially chromium, vanadium, so that the steel occurs in process of setting
Unbalanced substable eutectic carbide, and eutectic carbide is very big on the influence of the impact toughness of mold in crystal boundary aggregation.Simultaneously
Due to be in mold use process it is direction-free, this requires molds the tropisms such as good mechanics, higher side knock.
Summary of the invention
Background technique there are aiming at the problem that, the purpose of the present invention is to provide one kind can be improved diffusion effect, improve
The high temperature diffusion process for forging of impact flexibility.
In order to achieve the above objectives, the high temperature diffusion process for forging of design of the invention, comprising the following steps:
Workpiece to be added is warming up to 1240 DEG C ± 10 DEG C according to using the different heating rate of multistage, and keeps the temperature one section by S1
Time；
S2 takes out workpiece to be added and starts to pull out forging workpiece to be added after being performed in multiple times first pier；Pulling out before completing forging every time
It all melts down after length and is forged next time again after keeping the temperature a period of time at a certain temperature；
S3, last time are machined to forging's block dimension after keeping the temperature.
Preferably, 1240 DEG C ± 10 DEG C are finally warming up to using three steps in S1:
A, a period of time is kept the temperature after being warming up to 600 DEG C with heating rate≤60 DEG C/h；
B, a period of time is kept the temperature after being warming up to 850 DEG C with heating rate≤80 DEG C/h；
C, 1240 DEG C ± 10 DEG C are warming up to heating rate≤100 DEG C/h.
It is further preferred that the time kept the temperature in step A is 3 hours.
It is further preferred that the time kept the temperature in step B is 3 hours.
Preferably, the time kept the temperature in S1 is 10~14 hours.
Preferably, forging's block dimension is reached for four times using the first upset circulation that pulls out again in S2, it is preceding pull out three times after all need
Melt down heat preservation；For the first time and the temperature of second of pulling end heat preservation is 1240 DEG C ± 10 DEG C, and the time of heat preservation is 3 hours；The
It is 1240 DEG C ± 10 DEG C that pulling, which terminates the temperature of heat preservation, three times, and the time of heat preservation is 14 hours.
The beneficial effects of the present invention are: the present invention uses High temperature diffusion twice, the heat preservation and S2 last time in S1 are kept the temperature,
Time extension improves diffusion effect, and long-time heat preservation, is conducive to the diffusion of alloying element at high temperature, and reaching improves segregation
Effect, while the cross-sectional dimension of the workpiece to be added of the High temperature diffusion of last time is less than original workpiece to be added, diffusion effect in S2
Fruit is more preferable than first time diffusion effect.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is heating process curve in S1 of the present invention
Specific embodiment
Below by Fig. 1 and enumerate the modes of some alternative embodiments of the invention, to technical solution of the present invention (including
Optimal technical scheme) it is described in further detail.Obviously, described embodiment is only that a part of the invention is implemented
Example, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not making creative labor
Every other embodiment obtained under the premise of dynamic, shall fall within the protection scope of the present invention.
The high temperature diffusion process for forging of design of the invention, comprising the following steps:
Workpiece to be added is warming up to 1240 DEG C ± 10 DEG C according to using the different heating rate of multistage by S1, and keep the temperature 10~
14 hours；1240 DEG C ± 10 DEG C are finally warming up to using three steps:
A, 3 hours are kept the temperature after being warming up to 600 DEG C with heating rate≤60 DEG C/h；
B, 3 hours are kept the temperature after being warming up to 850 DEG C with heating rate≤80 DEG C/h；
C, 1240 DEG C ± 10 DEG C are warming up to heating rate≤100 DEG C/h.
S2 takes out workpiece to be added and starts to pull out forging workpiece to be added after being performed in multiple times first pier, pulling out before completing forging every time
It all melts down after length and is forged next time again after keeping the temperature a period of time at a certain temperature；Circulation is pulled out again using first upset
Reach forging's block dimension for four times, it is preceding pull out three times after all need to melt down heat preservation；For the first time and second pulls out the temperature for terminating heat preservation
Degree is 1240 DEG C ± 10 DEG C, and the time of heat preservation is 3 hours；The temperature that third time pulling terminates heat preservation is 1240 DEG C ± 10 DEG C, is protected
The time of temperature is 14 hours.
S3, last time are machined to forging's block dimension after keeping the temperature.
It should be readily apparent to one skilled in the art that the above is merely preferred embodiments of the present invention, not to limit this hair
Bright, all any modification, combination, replacement, improvement etc. made under the spirit and principles in the present invention are all contained in guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of high temperature diffusion process for forging, comprising the following steps:
Workpiece to be added is warming up to 1240 DEG C ± 10 DEG C according to using the different heating rate of multistage, and keeps the temperature a period of time by S1；
S2 takes out workpiece to be added and starts to pull out forging workpiece to be added after being performed in multiple times first pier；Each pulling knot before completing forging
It all melts down after beam and is forged next time again after keeping the temperature a period of time at a certain temperature；
S3, last time are machined to forging's block dimension after keeping the temperature.
2. the high temperature diffusion process according to claim 1 for forging, it is characterised in that: use the most final rise of three steps in S1
Temperature is to 1240 DEG C ± 10 DEG C:
A, a period of time is kept the temperature after being warming up to 600 DEG C with heating rate≤60 DEG C/h；
B, a period of time is kept the temperature after being warming up to 850 DEG C with heating rate≤80 DEG C/h；
C, 1240 DEG C ± 10 DEG C are warming up to heating rate≤100 DEG C/h.
3. the high temperature diffusion process according to claim 2 for forging, it is characterised in that: the time kept the temperature in step A
It is 3 hours.
4. the high temperature diffusion process according to claim 2 for forging, it is characterised in that: the time kept the temperature in step B
It is 3 hours.
5. the high temperature diffusion process according to claim 1 for forging, it is characterised in that: the time kept the temperature in S1 is 10
~14 hours.
6. the high temperature diffusion process according to claim 1 for forging, it is characterised in that: pulled out again in S2 using first upset
Reach forging's block dimension for long circulating four times, it is preceding pull out three times after all need to melt down heat preservation；For the first time and second of pulling terminates to protect
The temperature of temperature is 1240 DEG C ± 10 DEG C, and the time of heat preservation is 3 hours；The temperature that third time pulling terminates heat preservation is 1240 DEG C ± 10
DEG C, the time of heat preservation is 14 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811053848.5A CN109022729A (en) | 2018-09-11 | 2018-09-11 | A kind of high temperature diffusion process for forging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811053848.5A CN109022729A (en) | 2018-09-11 | 2018-09-11 | A kind of high temperature diffusion process for forging |
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| CN109022729A true CN109022729A (en) | 2018-12-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544179A (en) * | 2003-11-27 | 2004-11-10 | 宝钢集团上海五钢有限公司 | Hot working method of die steel large-scale modular forgings |
| CN1730193A (en) * | 2005-09-02 | 2006-02-08 | 邢台机械轧辊(集团)有限公司 | Sectionalize heating technique in high alloy cold roller blank manufacture |
| CN105363981A (en) * | 2015-12-02 | 2016-03-02 | 贵州安大航空锻造有限责任公司 | Method for forging formation of 16Cr3NiWMoVNbE forge piece |
| CN105689628A (en) * | 2016-02-15 | 2016-06-22 | 江阴南工锻造有限公司 | Forging process for wind power main shaft made of 34CrNiMo6 steel |
| CN107699800A (en) * | 2017-08-30 | 2018-02-16 | 唐山志威科技有限公司 | A kind of core rod ZW633 Used for Large-sized Plastics containing Nb and preparation method thereof |
-
2018
- 2018-09-11 CN CN201811053848.5A patent/CN109022729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544179A (en) * | 2003-11-27 | 2004-11-10 | 宝钢集团上海五钢有限公司 | Hot working method of die steel large-scale modular forgings |
| CN1730193A (en) * | 2005-09-02 | 2006-02-08 | 邢台机械轧辊(集团)有限公司 | Sectionalize heating technique in high alloy cold roller blank manufacture |
| CN105363981A (en) * | 2015-12-02 | 2016-03-02 | 贵州安大航空锻造有限责任公司 | Method for forging formation of 16Cr3NiWMoVNbE forge piece |
| CN105689628A (en) * | 2016-02-15 | 2016-06-22 | 江阴南工锻造有限公司 | Forging process for wind power main shaft made of 34CrNiMo6 steel |
| CN107699800A (en) * | 2017-08-30 | 2018-02-16 | 唐山志威科技有限公司 | A kind of core rod ZW633 Used for Large-sized Plastics containing Nb and preparation method thereof |
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Application publication date: 20181218 |