CN106086729A - The technique that a kind of aging time controls high temperature alloy STRESS VARIATION - Google Patents
The technique that a kind of aging time controls high temperature alloy STRESS VARIATION Download PDFInfo
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- CN106086729A CN106086729A CN201610423990.9A CN201610423990A CN106086729A CN 106086729 A CN106086729 A CN 106086729A CN 201610423990 A CN201610423990 A CN 201610423990A CN 106086729 A CN106086729 A CN 106086729A
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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
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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
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Abstract
The present invention relates to a kind of aging time and control the technique of high temperature alloy GH141 STRESS VARIATION, belong to the technical field of heat treatment of high temperature alloy.It is characterized in that: on Gleeble 3500 thermal simulation experiment machine, simulate the welding process of sample.Add the load of a uniform load vertically at temperature during fall, obtain one and be equivalent to there is residual stress and the heat affected area by sweating heat impact.Then simulation postwelding solid solution, a timeliness and secondary ageing process, after 1050～1080 DEG C of solution treatment, carry out two-stage aging strengthening model respectively, first carry out an Ageing Treatment, it is incubated 1200s at 960 DEG C, then being cooled to 760 DEG C with 10 DEG C/s, 1800s is as secondary ageing in insulation, is finally as cold as room temperature with 10 DEG C/s.The present invention records the real-time change process of stress in heat treatment process.It is easy to obtain that numerical value is little and stable stress, reduces the generation probability of ageing crack.
Description
Technical field
The present invention relates to a kind of aging time and control the technique of high temperature alloy GH141 STRESS VARIATION, belong to high temperature alloy
Technical field of heat treatment.
Background technology
GH141 high temperature alloy is a kind of precipitation strength type superalloy, and it is often used as welding base metal makes
With, but its as welding assembly when carrying out heat treatment, be easily generated strain-age cracking.There is Many researchers that crackle has been done in detail
Thin research, the change procedure of stress in high temperature alloy GH141 PWHT procedures was not carried out special by researcher
Research and analyse, but in the generation of crackle and heat treatment process, the change procedure of stress is the most directly related.Therefore, the different heat of research
Process the variation tendency of stress in technical process and have critically important meaning.
Summary of the invention
It is desirable to provide the technique that a kind of aging time controls high temperature alloy GH141 STRESS VARIATION, it is simple to counted
It is worth little and stable stress, reduces the generation probability of ageing crack.
For achieving the above object, the technical solution used in the present invention is:
The technique that a kind of aging time controls high temperature alloy GH141 STRESS VARIATION, it is characterised in that: at Gleeble-3500
The welding process of superalloy coupons is simulated on thermal simulation experiment machine.Simulation process is heated to 1200 DEG C with 200 DEG C/s, insulation
4s, is cooled to 800 DEG C with 50 DEG C/s, then is cooled to 600 DEG C with 20 DEG C/s, then is cooled to 30 DEG C with 10 DEG C/s.
A kind of aging time as above controls the technique of high temperature alloy STRESS VARIATION, wherein: drop process at temperature
In add the load of a uniform load vertically, obtain one and be equivalent to there is residual stress and by sweating heat impact
Heat affected area.
A kind of aging time as above controls the technique of high temperature alloy STRESS VARIATION, wherein: continue after having welded
By the simulation solid solution of Gleeble-3500 thermal simulation experiment machine, a timeliness and secondary ageing heat treatment process.
A kind of aging time as above control high temperature alloy STRESS VARIATION technique, wherein, the solid solubility temperature time with
Secondary ageing temperature-time all immobilizes, and only changes an aging time.Aging time excursion be 300～
1800s。
A kind of aging time as above controls the technique of high temperature alloy STRESS VARIATION, wherein: in simulation solid solution, once
Timeliness and secondary ageing heat treatment process record the real-time change process of stress.
Testing discovery by the present invention, in the 1200s in an ageing process, a season stress is all along with process
The increase of time and be gradually reduced, and when 1200～1800s, there is obvious ascendant trend in stress.Should during secondary ageing
Power peak difference is not away from being very big, and when under the different disposal time, secondary ageing processes, stress occurs that the process of peak value exists certain time
Difference, 1800s occurs the earliest, and 1200s, 900s and 600s peak value time of occurrence is more or less the same, and 300s occurs that time to peak is the latest.One
The time of secondary Ageing Treatment is the longest, and during secondary ageing heat treatment, peak stress time of occurrence is the most early.On the whole in 1200s process
Time stress value relatively low and steady.
Accompanying drawing explanation
Fig. 1 is that measured stress loading procedure of the present invention and stress are with heat treatment change curve schematic diagram.
Fig. 2 is different aging time season stress change curves next time.
Fig. 3 is secondary ageing stress changing curve under a different aging time.
Detailed description of the invention
The detection method provided the present invention with embodiment below in conjunction with the accompanying drawings is introduced:
Take GH141 high temperature alloy and make Gleeble test standard sample size.
Gleeble-3500 thermal simulation experiment machine is simulated the welding process of sample, is heated to 1200 DEG C with 200 DEG C/s,
Insulation 4s, is cooled to 800 DEG C with 50 DEG C/s, then is cooled to 600 DEG C with 20 DEG C/s, then be cooled to 30 DEG C with 10 DEG C/s.
Add the load of a uniform load vertically at temperature during fall, obtain one and be equivalent to there are remnants
Stress and the heat affected area by sweating heat impact.
Then simulation postwelding solid solution, a timeliness and secondary ageing process.After 1050～1080 DEG C of solution treatment, respectively
Carrying out two-stage aging strengthening model, first, one time aging temp is constant, is 960 DEG C, the time have chosen 300s, 600s, 900s,
Then these 5 times of 1200s, 1800s are cooled to 760 DEG C with 10 DEG C/s as an aging time, and 1800s is as two in insulation
Secondary timeliness, is finally as cold as room temperature with 10 DEG C/s.
The real-time change process of stress is recorded, as attached in simulation solid solution, a timeliness and secondary ageing heat treatment process
Shown in Fig. 1.Stress can be clearly seen along with the situation of change of heat treatment process on figure.
Different aging time season stress next time and secondary ageing stress changing curve are respectively such as Fig. 2 and Fig. 3 institute
Show.
In 1200s in an ageing process, season stress all along with the time of process increase and gradually
Decline, and when 1200～1800s, obvious ascendant trend occurs in stress.During secondary ageing, peak stress gap is not very
Greatly, when under the different disposal time, secondary ageing processes, to occur that the process of peak value exists certain time poor for stress, and 1800s appearance is
Early, 1200s, 900s and 600s peak value time of occurrence is more or less the same, and 300s occurs that time to peak is the latest.Ageing Treatment time
Between the longest, during secondary ageing heat treatment, peak stress time of occurrence is more early.On the whole when 1200s processes stress value relatively low and
Steadily.
Claims (2)
1. the technique that an aging time controls high temperature alloy STRESS VARIATION, it is characterised in that: the step of the method is as follows:
(1) on Gleeble-3500 thermal simulation experiment machine, simulate the welding process of superalloy coupons；Simulation process is with 200
DEG C/s is heated to 1200 DEG C, it is incubated 4s, is cooled to 800 DEG C with 50 DEG C/s, then is cooled to 600 DEG C with 20 DEG C/s, then with 10 DEG C/s
It is cooled to 30 DEG C；Add the load of a uniform load vertically at temperature during fall, obtain one and be equivalent to exist
Residual stress and the heat affected area by sweating heat impact；
(2) the simulation solid solution of Gleeble-3500 thermal simulation experiment machine, a timeliness and secondary ageing are continued through after having welded
Heat treatment process；The real-time change process of stress is recorded in simulation solid solution, a timeliness and secondary ageing heat treatment process.
The technique that a kind of aging temp the most according to claim 1 controls high temperature alloy STRESS VARIATION, it is characterised in that on:
Stating in step (2), the solid solubility temperature time all immobilizes with secondary ageing temperature-time, only changes an aging time, once
Aging time excursion is 300～1800s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376003A (en) * | 2020-10-26 | 2021-02-19 | 中国航发动力股份有限公司 | Process for improving yield strength of GH141 material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925835A (en) * | 2012-11-02 | 2013-02-13 | 北京星航机电设备厂 | High-temperature alloy stress-removing aging process method |
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- 2016-06-15 CN CN201610423990.9A patent/CN106086729B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925835A (en) * | 2012-11-02 | 2013-02-13 | 北京星航机电设备厂 | High-temperature alloy stress-removing aging process method |
Non-Patent Citations (3)
| Title |
|---|
| 张皖菊、李殿凯: "《金属材料学实验》", 31 August 2013, 合肥工业大学出版社 * |
| 毕宗岳: "《管线钢管线焊接技术》", 31 December 2013, 石油工业出版社 * |
| 赵志毅等: "热处理工艺对GH909板材TIG焊缝析出相的影响", 《材料科学与工艺》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376003A (en) * | 2020-10-26 | 2021-02-19 | 中国航发动力股份有限公司 | Process for improving yield strength of GH141 material |
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| CN106086729B (en) | 2018-07-24 |
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