CN106834613A - A kind of heat treatment method for improving moving-iron receiver part magnetic property - Google Patents
A kind of heat treatment method for improving moving-iron receiver part magnetic property Download PDFInfo
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- CN106834613A CN106834613A CN201611260911.3A CN201611260911A CN106834613A CN 106834613 A CN106834613 A CN 106834613A CN 201611260911 A CN201611260911 A CN 201611260911A CN 106834613 A CN106834613 A CN 106834613A
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- receiver part
- moving
- iron receiver
- heat treatment
- magnetic property
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
-
- 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
- C21D1/30—Stress-relieving
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C21D2201/00—Treatment for obtaining particular effects
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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)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of heat treatment method of raising moving-iron receiver part magnetic property of moving-iron receiver technical field, including：Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, is heated；Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100 200 DEG C；Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled down.On the basis of existing Technology for Heating Processing, the technical scheme being combined with temper using magnetic-field annealing significantly improves magnetic property to the embodiment of the present invention.
Description
Technical field
It is more particularly to a kind of to improve moving-iron receiver part magnetic the present embodiments relate to moving-iron receiver technical field
The heat treatment method of performance.
Background technology
Moving-iron receiver is typically made up of parts such as induction coil, magnet, crown cap, vibrating diaphragm, cushion rubber and supports, and part exists
Production, need in assembling process to be related to anneal, cast, forge, the technique such as weldment, annealing, casting, forging, weldment etc. are when cooling down due to each portion
Position cooling velocity is different and produce internal stress, metal and alloy is in cold deformation processing and workpiece is in cutting process
Produce internal stress.Do not removed in time if internal stress is larger, often result in workpiece deformation and even form crackle.De-stress is gone to move back
Fighting can not completely remove internal stress, and simply part removes, so as to eliminate its illeffects.For weldment, weldering
The main purpose being heat-treated afterwards is to eliminate residual stress.Welding residual stress is because welding causes the uneven temperature of weldment
Degree distribution, what the reason such as expand with heat and contract with cold of weld metal was caused, so residual stress will necessarily be produced with welding procedure.It is conventional
Weldment go the tempering of de-stress between 500~600 DEG C, air cooling of being come out of the stove after insulation.If the mode of shove charge is incorrect
Product can be caused to be deformed, just the technique of tempering will not produce too much influence to the deformation of product in itself.For pressure
Force container, it is of the prior art to be all directly applicable to destressing scheme due to the requirement such as its pressure.So engineering staff exists
Mostly it is, with reference to process of thermal treatment parameter after vessels not under pressure welding, then to obtain after extending heat treatment time in engineering practice.This
Sample, usually problem that may arise is that burning or heating-up temperature foot etc..
In order to ensure moving-iron receiver part quality, the metal parts for eliminating moving-iron receiver part is processed before assembling
The stress that is produced in journey, to soften alloy, alloy is obtained optimal magnetic property be that moving-iron receiver component technology field is standby always
Technical barrier interesting issue, even more urgently to be resolved hurrily.Although CN 106086327A disclose a kind of raising mild steel magnetic conduction
The heat treatment method of magnetism of material energy, and then the sensitivity of the products such as loudspeaker is improved, but the first technology is improving magnetic
It is limited in the degree of energy.
The content of the invention
For the drawbacks described above of prior art, moving-iron receiver part magnetic property is improved it is an object of the invention to provide one kind
Heat treatment method.
The purpose of the present invention is achieved through the following technical solutions：
The present invention provides a kind of heat treatment method for improving moving-iron receiver part magnetic property, including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, plus
Heat；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled to less than 100 DEG C, taken
Go out moving-iron receiver part, you can.
Preferably, in the step of heating, the moving-iron receiver part needs to carry out roughening treatment before heating.
Preferably, roughness Ra is 12.5-25 after the roughening treatment.
Preferably, in the step of heating, the mode by the air discharge in heating furnace flue is specifically heating-furnace
Inert gas is passed through in courage.
Preferably, in the step of heating, the temperature of the heating is not higher than 100 DEG C.
Preferably, in the step of constant temperature keeps, the protective gas is reducibility gas.
Preferably, in the step of constant temperature keeps, the condition of the constant temperature is：1200-1300℃、2-4h.
Preferably, in the step of annealing, the condition of the magnetic-field annealing is：It is 10000- prior to magnetic field intensity
Anneal 0.5-1h under the magnetic field of 15000e, is the 1-2h that annealed under the magnetic field of 20000-25000e then at magnetic field intensity.
Preferably, in the step of temper, the condition of the temper is：Constant temperature 0.2- at prior to 300-400 DEG C
0.5h, then at constant temperature 0.2-0.5h at 500-600 DEG C.
Preferably, in the step of temper, the cooling specifically cools the temperature to 100-200 DEG C of moving-iron receiver
Part is placed in 40-60 DEG C of water again after taking out.
Compared with prior art, present invention has the advantages that：
The embodiment of the present invention on the basis of existing Technology for Heating Processing, the skill being combined with temper using magnetic-field annealing
Art scheme, can not only eliminate moving-iron receiver component stress, significantly improve magnetic property.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1-3
Embodiment 1-3 provides a kind of heat treatment method for improving moving-iron receiver part magnetic property respectively, including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, plus
Heat；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled to less than 100 DEG C, taken
Go out moving-iron receiver part, you can.
Specifically, embodiment 1, embodiment 2, design parameter such as table 1 below involved by embodiment 3：
Table 1
Embodiment 4
The present embodiment is the change case of embodiment 1, is specifically to provide a kind of heat for improving moving-iron receiver part magnetic property
Processing method, including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, plus
Heat；Wherein, roughening treatment has been carried out to moving-iron receiver part before heating, roughness Ra exists after roughening treatment roughening treatment
In the range of 12.5-25；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；Wherein, protective gas：
Hydrogen；The condition of constant temperature is：1200℃、4h；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Wherein, it is the 1h that annealed under the magnetic field of 10000e prior to magnetic field intensity, is the 2h that annealed under the magnetic field of 20000e then at magnetic field intensity；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled to less than 100 DEG C, taken
Go out moving-iron receiver part, you can；Wherein, the temper condition is：Constant temperature 0.5h at prior to 300 DEG C, at 600 DEG C
Constant temperature 0.2h；It is described cooling be specifically cool the temperature to 100-200 DEG C moving-iron receiver part take out after be placed on 40 again
DEG C water in.
Comparative example 1-3
Comparative example 1-3 is the comparative example of embodiment 1, is specifically to provide a kind of heat for improving moving-iron receiver part magnetic property
Processing method, including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, plus
Heat；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled to less than 100 DEG C, taken
Go out moving-iron receiver part, you can.
Comparative example 1-3's differs only in involved step different from embodiment 1, specifically refers to table 2：
Table 2
Comparative example 4-6
Comparative example 4-6 is the comparative example of embodiment 1, is specifically to provide a kind of heat for improving moving-iron receiver part magnetic property
Processing method, including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, plus
Heat；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled to less than 100 DEG C, taken
Go out moving-iron receiver part, you can.
Comparative example 4-6's differs only in involved parameter different from embodiment 1, specifically refers to table 3：
Table 3
Performance detection
In order to protrude the significant advantage of the embodiment of the present invention, to embodiment 1 and its gained moving-iron receiver portion of comparative example
The performance of part is tested；
The method of magnetism testing is this area traditional test methods；
Short time weatherability corrosion test (cycle is two days) is carried out to the moving-iron receiver part after heat treatment, wherein temperature
Degree/humidity alternate cycles be three hours from 25 DEG C and 55% air humidity to 55 DEG C and 98% air humidity, detect whether exist
Hot spot.
The result of test such as table 4 below；
In test, blank, i.e., the Technology for Heating Processing of traditional moving-iron receiver part, prior heat treatment work are additionally provided with
Skill compared with Example 1, the difference is that only and not contain annealing process step and temper step.
Table 4
By above-described embodiment, the performance test results of comparative example, it is analyzed as follows：
Comparative example 1 is differed only in embodiment 1, and the annealing that comparative example 1 is used is moved back for magnetic field intensity is constant
Fire treatment.In this case, the remanent magnetization of comparative example 1, saturation magnetization are substantially less than embodiment 1, and this shows, though
So compared with prior heat treatment process, magnetic-field annealing can be deducted a percentage the magnetic property of moving-iron receiver part, but stationary magnetic field is annealed
It is limited during to the change degree of the performance, the embodiment of the present invention not only creative skill that magnetic-field annealing is combined with temper
Art increases in Technology for Heating Processing, and also the condition to magnetic-field annealing is further preferred, so that performance change is notable.
Comparative example 2 is differed only in embodiment 1, and the temper that comparative example 2 is used is ausrolling.In the situation
Under, the remanent magnetization of comparative example 2, saturation magnetization are substantially less than embodiment 1.This shows, although become high-intensity magnetic field annealing
Can change remanent magnetization, saturation magnetization, but become change of the high-intensity magnetic field annealing to the effect above be also it is limited,
Only under the collaboration of temper, using alternating temperature temper, moving-iron receiver part magnetic property can be just obviously improved.Although
Temper is technology commonly used in the art, but technical characteristic effect in embodiments of the present invention is not to be disclosed
, its improvement to magnetic properties optimization degree is also that those skilled in the art are difficult to what is expected.
Comparative example 3 is differed only in embodiment 1, and the annealing of comparative example 3 uses permanent magnetic field, while at tempering
Reason uses constant temperature；Comparative example 3 is respectively with the difference of comparative example 1 and comparative example 2 and changes annealing, temper.
Under these conditions, the effect of comparative example 3 is worse than comparative example 1, comparative example 2, becomes apparent from inferior to embodiment 1.This shows, in this hair
There is obvious synergy in the implementation process of bright embodiment, between annealing, temper, jointly to heat processing unit
Magnetic property play Pasitive Regulation Effect of Genseng, this synergy is that prior art does not have disclosed, this Pasitive Regulation Effect of Genseng
Institute's energy degree to which is also unexpected those skilled in the art institute, it is often more important that, in the art, will make annealing treatment
It is rare comparing to be combined with temper, and these combinations of the embodiment of the present invention overcome those skilled in the art for heat
The prejudice of the single use annealing of handling process or single use temper.
The parameter for differing only in annealing of comparative example 4 and embodiment 1 is beyond restriction of the invention, comparative example 5
With the parameter for differing only in temper of embodiment 1 beyond restriction of the invention, as a result as shown in table 4, the He of comparative example 4
The effect of comparative example 5 is significantly worse than embodiment 1, and this not only show again annealing, temper in the embodiment of the present invention
In synergy, more prominent explanation parameter of the invention is the result of the creative screening of inventor, if joined beyond invention
Several restriction, then the degree to magnetic property lifting will be subject to serious negative effect.
In implementation process of the invention, can also roughening treatment be carried out to moving-iron receiver part to be heated, make it
Roughness Ra is specifically shown in the comparing of embodiment 4 and embodiment 1 in the range of 12.5-25, although embodiment 1 is to moving-iron receiver
Part has carried out roughening treatment, but if the degree of its roughening treatment meets the scope that embodiment 4 is provided, then not only can be with
Realize the lifting of magnetic property, it is often more important that the weatherability corrosion of moving-iron receiver part can also be improved.In the art, although
It is common technology means that roughening treatment is carried out to moving-iron receiver part, but is applied in Technology for Heating Processing and plays anti-
The effect of corrosion is that those skilled in the art to be readily occurred in.
In addition, in implementation process of the invention, cooling treatment is preferably the mode of first conventional chilling and then water-cooled, specifically
See comparative example 6 and embodiment 1, inventor has found that the cooling way of the embodiment of the present invention can take into account magnetic properties optimization
On the basis of realize erosion-resisting effect.
It should be noted that preferred embodiment of the invention is given in specification of the invention, but, the present invention can
To be realized by many different forms, however it is not limited to which the embodiment described by this specification, these embodiments are not as right
The extra limitation of present invention, there is provided the purpose of these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.Also, above-mentioned each technical characteristic continues to be mutually combined, the various embodiments that formation is not enumerated above are accordingly to be regarded as this hair
Speak frankly the scope that bright secretary carries；Further, for those of ordinary skills, can be improved according to the above description
Or conversion, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. it is a kind of improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that including：
Heat：Moving-iron receiver part is placed in heating furnace, and by the air discharge in heating furnace flue, is heated；
Constant temperature keeps：To protective gas is passed through in the heating furnace, continue to keep constant temperature after heating；
Annealing：Increasing external magnetic field carries out magnetic-field annealing, and the moving-iron receiver part is cooled into 100-200 DEG C；
Temper：Temper is carried out to the moving-iron receiver part after the cooling, is cooled down.
2. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that heating
In the step for the treatment of, the moving-iron receiver part needs to carry out roughening treatment before heating.
3. it is according to claim 2 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that it is described
Roughness Ra is 12.5-25 after roughening treatment.
4. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that heating
In the step for the treatment of, the mode by the air discharge in heating furnace flue is specifically to be passed through inert gas in heating furnace flue.
5. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that heating
In the step for the treatment of, the temperature of the heating is not higher than 100 DEG C.
6. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that constant temperature
In the step of holding, the protective gas is reducibility gas.
7. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that constant temperature
In the step of holding, the condition of the constant temperature is：1200-1300℃2-4h.
8. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that annealing
In the step for the treatment of, the condition of the magnetic-field annealing is：It is the 0.5- that annealed under the magnetic field of 10000-15000e prior to magnetic field intensity
1h, is the 1-2h that annealed under the magnetic field of 20000-25000e then at magnetic field intensity.
9. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that tempering
In the step for the treatment of, the condition of the temper is：Constant temperature 0.2-0.5h at prior to 300-400 DEG C, at 500-600 DEG C
Constant temperature 0.2-0.5h.
10. it is according to claim 1 improve moving-iron receiver part magnetic property heat treatment method, it is characterised in that return
Fire treatment the step of in, it is described cooling be specifically cool the temperature to 100-200 DEG C moving-iron receiver part take out after again by it
It is placed in 40-60 DEG C of water.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588591A (en) * | 2004-09-29 | 2005-03-02 | 钢铁研究总院 | Process for preparing iron-chromium-cobalt permanent magnet radiation ring and radial orientation device |
| CN101298646A (en) * | 2008-05-29 | 2008-11-05 | 天津冶金集团天材科技发展有限公司 | Aluminum-niobium composite iron-chromium-cobalt permanent magnetic alloy and deformation processing technique |
| CN102623166A (en) * | 2012-04-17 | 2012-08-01 | 江苏大学 | Preparation method for high performance as cast condition neodymium iron boron magnet |
| CN104240884A (en) * | 2014-09-29 | 2014-12-24 | 中国科学院宁波材料技术与工程研究所 | Multi-pole integral permanent magnetic ring as well as preparation method and production system thereof |
| CN106086328A (en) * | 2016-07-18 | 2016-11-09 | 瑞声科技(新加坡)有限公司 | The heat treatment method of mild steel soft magnetic materials |
| CN106229101A (en) * | 2016-06-27 | 2016-12-14 | 无锡新大力电机有限公司 | A kind of preparation method of high-coercive force SmCo based permanent magnetic material |
-
2016
- 2016-12-30 CN CN201611260911.3A patent/CN106834613B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588591A (en) * | 2004-09-29 | 2005-03-02 | 钢铁研究总院 | Process for preparing iron-chromium-cobalt permanent magnet radiation ring and radial orientation device |
| CN101298646A (en) * | 2008-05-29 | 2008-11-05 | 天津冶金集团天材科技发展有限公司 | Aluminum-niobium composite iron-chromium-cobalt permanent magnetic alloy and deformation processing technique |
| CN102623166A (en) * | 2012-04-17 | 2012-08-01 | 江苏大学 | Preparation method for high performance as cast condition neodymium iron boron magnet |
| CN104240884A (en) * | 2014-09-29 | 2014-12-24 | 中国科学院宁波材料技术与工程研究所 | Multi-pole integral permanent magnetic ring as well as preparation method and production system thereof |
| CN106229101A (en) * | 2016-06-27 | 2016-12-14 | 无锡新大力电机有限公司 | A kind of preparation method of high-coercive force SmCo based permanent magnetic material |
| CN106086328A (en) * | 2016-07-18 | 2016-11-09 | 瑞声科技(新加坡)有限公司 | The heat treatment method of mild steel soft magnetic materials |
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