CN102899465A - Vacuum pulse hydrogen annealing apparatus and method for electric pure iron - Google Patents
Vacuum pulse hydrogen annealing apparatus and method for electric pure iron Download PDFInfo
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- CN102899465A CN102899465A CN201210332246XA CN201210332246A CN102899465A CN 102899465 A CN102899465 A CN 102899465A CN 201210332246X A CN201210332246X A CN 201210332246XA CN 201210332246 A CN201210332246 A CN 201210332246A CN 102899465 A CN102899465 A CN 102899465A
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Abstract
The invention discloses a vacuum pulse hydrogen annealing apparatus for electric pure iron. The apparatus comprises a furnace body, a diffusion pump, a furnace lid, a flexible air inlet pipe, a flexible air outlet pipe, a butterfly valve and a diffusion pump air outlet pipe, wherein the furnace body is provided with the furnace lid and is connected with the diffusion pump, the flexible air inlet pipe of the diffusion pump is provided with a first solenoid valve, the diffusion pump air outlet pipe of the diffusion pump is provided with the butterfly valve and two air outlets, the air outlets are located at two sides of the butterfly valve and mutually connected through the flexible air inlet pipe, and the flexible air inlet pipe is provided with a second solenoid valve. According to the invention, an automatic control system is additionally arranged, process is simple and is easy to operate, the degrees of control accuracy and automation are improved, and manpower is saved.
Description
Technical field
The invention belongs to the metal heat treatmet field, particularly a kind of electrical pure iron vacuum pulse hydrogen annealing device and method.
Background technology
The former processing of DT4 electrical pure iron is technique and the vacuum annealing furnace apparatus that uses vacuum annealing, but exist defective, often be magnetic after the processing and can satisfy the phenomenon of technical requirements, once it is defective multiple batches of product performance to occur, re-treatment is still defective, be in and wait to beat useless state, become the bottleneck that model is produced.Exist in addition the product surface after processing to have oxidation tint, plating brings negative interaction even products waste to subsequent chemistry.
After this consider to utilize hydrogen reduction, reprocess with the method for hydrogen annealing.Common hydrogen annealing furnace all continues to pass into hydrogen under normal pressure, air outlet ignition waste gas, and there is potential safety hazard in annealing device, in case when the hydrogen-oxygen ratio reaches 3:7, just may blast.
Therefore, existing apparatus and method all can not satisfy the demand to the processing of DT4 electrical pure iron.
Summary of the invention
Technical problem solved by the invention is to provide a kind of electrical pure iron vacuum pulse hydrogen annealing device and method.
The technical solution that realizes the object of the invention is: a kind of electrical pure iron vacuum pulse hydrogen annealing device, comprise body of heater, diffusion pump, bell, air induction hose, air-out hose, butterfly valve and diffusion pump escape pipe,
On the described body of heater bell is set, this body of heater is connected with diffusion pump, the first magnetic valve is set on the air induction hose of described diffusion pump, on the diffusion pump escape pipe of diffusion pump butterfly valve is set, two production wells also are set on the diffusion pump escape pipe, these two production wells are positioned at the both sides of butterfly valve, and described two production wells link to each other by air-out hose, and the second magnetic valve is set on the air-out hose.
A kind of electrical pure iron vacuum pulse hydrogen annealing method may further comprise the steps:
The present invention compared with prior art, its remarkable advantage is: 1) adopt vacuum pulse hydrogen annealing method, electrical pure iron is heat-treated, satisfy the high magnetic requirement of DT4 electrical pure iron fully; Reach following technical indicator:
DT4:μ
m≥15.1（mH/m）,B
5000≥1.71(T),H
c(A/m)≤32；
2) owing to mixing with airborne oxygen, hydrogen can form explosive mixed gas, must fundamentally overcome the possibility that has this mixed gas, and to prevent the atmosphere leakage, away from kindling material, method of the present invention makes and is in negative pressure state in the stove, hydrogen and airborne oxygen can not reach dangerous ratio, have solved the safety issue of equipment;
3) the automatic control system normal operation of vacuum pulse hydrogen annealing has significantly alleviated operator's labour intensity, and has reduced the artifical influence factor in the operating process, is conducive to the raising of quality product;
4) vacuum pulse hydrogen annealing fully carries out the reduction reaction of hydrogen, has significantly improved the surface quality of DT4 material, makes the workpiece surface color and luster bright and clean, is of value to follow-up plated surface and processes;
5) the present invention has increased robot control system(RCS), and technique is simple to operation, and control levels of precision, level of automation are improved, and has saved manpower; The material coverage rate of processing enlarges, and magnetic property reaches unprecedented high target; The product surface smooth finish of processing is good, and follow-up electroless plating quality is improved; The S thermopair has increased the armouring protective casing, with H
2Isolated, improved thermopair work-ing life, solved the problem of thermopair fracture.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is electrical pure iron vacuum pulse hydrogen annealing device front view of the present invention.
Fig. 2 is electrical pure iron vacuum pulse hydrogen annealing device side-view of the present invention.
Fig. 3 is diffusion pump and pipeline connecting figure thereof in the electrical pure iron vacuum pulse hydrogen annealing device of the present invention.
Fig. 4 is electrical pure iron vacuum pulse hydrogen annealing device bell synoptic diagram of the present invention.
Embodiment
The present invention is for improving the magnetic property of DT4 magneticsubstance, satisfy the high performance index requirement, reaching the purpose that improves the magnetism of material energy.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, a kind of electrical pure iron vacuum pulse hydrogen annealing device of the present invention comprises body of heater 1, diffusion pump 2, bell 3, air induction hose 4, air-out hose 5, butterfly valve 6 and diffusion pump escape pipe 7,
On the described body of heater 1 bell 3 is set, this body of heater 1 is connected with diffusion pump 2, on the air induction hose 4 of described diffusion pump 2 the first magnetic valve is set, on the diffusion pump escape pipe 7 of diffusion pump 2 butterfly valve 6 is set, two production wells also are set on the diffusion pump escape pipe 7, these two production wells are positioned at the both sides of butterfly valve 6, and described two production wells link to each other by air-out hose 5, and the second magnetic valve is set on the air-out hose 5.
In conjunction with Fig. 4, described bell 3 comprises thermopair 3-1, nut 3-2, support ring 3-3, socket head cap screw 3-4, cover plate 3-5, bell body 3-6, armouring cover 3-7;
Described bell body 3-6 and cover plate 3-5 are fastening by socket head cap screw 3-4, support ring 3-3 is connected on the cover plate 3-5, armouring cover 3-7 is connected in the middle part of support ring 3-3 by nut 3-2, and this armouring cover 3-7 runs through cover plate 3-5 and bell body 3-6, in the armouring cover 3-7 thermopair 3-1 is set.
When actually operating, position of thermocouple must be able to reach the effective heating area of workpiece, should not affect the vacuum tightness of equipment behind the installation of TC, and the operator can operate.Thermopair increases the armouring cover, avoids thermopair fracture failure to be occurred after the reaction in reducing atmosphere.
The pre-opened hole that the installation site of thermopair can only utilize equipment itself to have, galvanic couple can not be installed in side at body of heater, because the watercooling jacket in the stove will move up and down, the thermopair horizontal direction can affect moving up and down of water jacket when inserting, and has a loophole to utilize in furnace roof section.Thermopair is as directly inserting the operation that furnace chamber neither affects watercooling jacket from upper vertical, is convenient to again add an armouring cover (because the armouring cover can not bending) at galvanic couple, reaches the purpose of protection thermopair.
Apparatus of the present invention are in work, by being connected of turnover air pipe and magnetic valve, such as Fig. 1, Fig. 2 and shown in Figure 3, hydrogen enters the first magnetic valve by gas cylinder along pipeline, enter in the vacuum oven along air induction hose 4 again, add a parallel pipeline in dish valve 6 front and back of diffusion pump escape pipe 7 and give vent to anger, when the circuit of control magnetic valve is closed, open dish valve 6, system is by former vacuum annealing furnace working order work;
When dish valve 6 cuts out, give vent to anger by air-out hose 5 through the second magnetic valve, return former diffusion pump outlet pipe 7, discharge outdoorly through mechanical pump, system press the vacuum pulse as-annealed condition and works.Can make like this equipment possess two kinds of functions.Piping layout as shown in Figure 3.
The present invention adds a small control cabinet by circuit layout, finishes the technical functionality that vacuumizes, leads to hydrogen, insulation, and links to each other with main control circuit, does not produce to interfere and disorder, solves the loaded down with trivial details problem of former artificial operation.
The present invention adopts stainless steel tube welding and connection by metal hose system pipeline, carries out first the pressurized water leak detection before pipeline is installed, and escape pipe of the present invention causes outdoor, and gas cylinder is placed in outside the worker-house, thereby to guarantee operational safety.
A kind of electrical pure iron vacuum pulse hydrogen annealing method of the present invention may further comprise the steps:
Below in conjunction with embodiment the present invention is done further detailed description:
By original vacuum annealing furnace is undergone technological transformation, increase the device of automatic-control pulse atmosphere, original electrical pure iron vacuum hydrogen annealing is manually controlled, become automatic control, alleviate operator's labour intensity, improved the control accuracy of heat treatment process.On this basis DT4 electrical pure iron magneticsubstance has been carried out technological test, the result of acquisition shows that this technology can improve magnetic property, satisfy DT4 than the high magnetic characteristics index.The vacuum pulse hydrogen annealing also helps DT4 electrical pure iron workpiece surface quality to improve, and makes workpiece surface bright and clean.Common hydrogen annealing refers to pass into hydrogen under atmospheric pressure state, and present technique makes the DT4 electrical pure iron pass into hydrogen with pulse condition vacuumizing under the state, utilizes the reductibility of hydrogen to improve magnetic property, and prevents that normal pressure hydrogen from processing the explosion hazard that may occur.The technique of vacuum pulse hydrogen annealing is shown in table (1):
The process test method of table (1) electrical pure iron
1) armoured thermocouple is installed
Thermopair at high temperature is exposed in the hydrogen and can ruptures very soon, and this is because thermopair exposes in hydrogen, can produce reduction reaction with hydrogen, causes galvanic couple to damage.Prevent fracture, need to be at galvanic couple dress armour cover.The selection in path is considered as follows:
The vacuum annealing furnace chamber is equipped with watercooling jacket, water jacket will be elevated to the height that workpiece is placed during use, passes into water coolant, so can not insert thermopair in the path of water jacket motion; Pass into thermopair from the upside that is higher than water jacket, need to be through two 90 ℃ directly curved, use the armour pipe improper, and select from the loophole of bell to pass into thermopair, by being installed in the porcelain duct on the bell, galvanic couple is directly passed into the effective temperature control of burner hearth district, thermopair is tightened gland after penetrating porcelain duct, and wear ring is flattened, and fills up the gap, thereby make the mating face seal of stove, keep vacuum tightness in the stove.
2) be installed into outlet pipe and robot control system(RCS)
In view of security reason, hydrogen cylinder does not allow to be placed in by the stove, selects the digging groove pipe laying buried lower, and all tube coupling heads are guaranteed without leaking through tightness test.Owing to be negative pressure in the stove, there is not the hydrogen-oxygen that must consider under the normal pressure than being the explosion hazard that may occur at 3/7 o'clock. gas cylinder is placed on safe place, by the stainless steel pipeline hydrogen is imported in the vacuum annealing furnace, and air inlet is installed magnetic valve on the path; Refill another magnetic valve on the path between vacuum pump and the body of heater, it is in parallel that the path of this magnetic valve and the path of giving vent to anger of former vacuum furnace body form, and mainly is to prevent that wherein break down in a certain path, all do not affect the normal use of stove.Magnetic valve is controlled by three time relays, finish vacuum pulse hydrogen annealing process vacuumize, pass into hydrogen, the insulation three phases, three phases is a circulation, heat-treats the automated cycle control process by automatic control circuit.Automated cycle control parameter such as following table.
Table (2) automated cycle control parameter
| Rly. | Vacuumize | Pass into hydrogen | Insulation |
| Time (S) | 600 | 20 | 600 |
| Furnace pressure | 20pa | 0.05Mpa | 20pa |
A kind of electrical pure iron vacuum pulse hydrogen annealing method may further comprise the steps:
A kind of electrical pure iron vacuum pulse hydrogen annealing method may further comprise the steps:
A kind of electrical pure iron vacuum pulse hydrogen annealing method may further comprise the steps:
Test-results
Table (3) DT4 testing of materials result
| Sequence number | μ m(mH/m） | B 5000(T) | H c(A/m) |
| 1 | 26.7 | 1.735 | 21.46 |
| 2 | 26.9 | 1.710 | 21.29 |
| 3 | 28.3 | 1.770 | 22.04 |
| 4 | 30.0 | 1.775 | 18.87 |
| 5 | 25.4 | 1.707 | 21.63 |
| 6 | 25.7 | 1.721 | 21.62 |
| 7 | 28.8 | 1.732 | 16.45 |
| 8 | 24.4 | 1.719 | 18.87 |
| 9 | 27.5 | 1.722 | 17.52 |
| 10 | 20.7 | 1.710 | 20.90 |
| 11 | 28.1 | 1.711 | 19.04 |
| 12 | 26.2 | 1.747 | 19.27 |
| 13 | 28.1 | 1.711 | 19.04 |
| 14 | 24.4 | 1.705 | 18.86 |
| 15 | 25.8 | 1.755 | 18.39 |
| Index | ≥15.1 | ≥1.71 | ≤32 |
By the above results as can be known, described DT4 technical indicator is by μ
m〉=15.1 (mH/m), B
5000〉=1.71 (T),, H
c≤ 48 (A/m) are increased to μ
m〉=15.1(mH/m), B
5000〉=1.71 (T), H
c≤ 32 (A/m).
The device and method of electrical pure iron vacuum pulse hydrogen annealing, can be applied to all kinds of workpiece of electrical pure iron material, the workpiece of especially having relatively high expectations for magnetic property, result after the processing can both be higher than the technical requirements of GB defined, particularly can satisfy the high magnetic characteristics index in the space flight and aviation product, overcome the shortcoming of the magnetic property deficiency that vacuum annealing may occur.The present invention can also improve the surface quality of workpiece, and the surface color difference before and after workpiece is processed is little, and is good especially to follow-up surface treatment.The present invention has also solved the dangerous hidden danger that the normal pressure hydrogen annealing may exist, and can accomplish to use safety.The present invention has alleviated operator's labour intensity, can carry out automatization control.
Claims (3)
1. an electrical pure iron vacuum pulse hydrogen annealing device is characterized in that, comprises body of heater [1], diffusion pump [2], bell [3], air induction hose [4], air-out hose [5], butterfly valve [6] and diffusion pump escape pipe [7],
Bell [3] is set on the described body of heater [1], this body of heater [1] is connected with diffusion pump [2], on the air induction hose [4] of described diffusion pump [2] the first magnetic valve is set, on the diffusion pump escape pipe [7] of diffusion pump [2] butterfly valve [6] is set, two production wells also are set on the diffusion pump escape pipe [7], these two production wells are positioned at the both sides of butterfly valve [6], and described two production wells link to each other by air-out hose [5], and air-out hose arranges the second magnetic valve on [5].
2. according to the described electrical pure iron vacuum pulse of claim hydrogen annealing device, it is characterized in that described bell [3] comprises thermopair [3-1], nut [3-2], support ring [3-3], socket head cap screw [3-4], cover plate [3-5], bell body [3-6], armouring cover [3-7];
Described bell body [3-6] is fastening by socket head cap screw [3-4] with cover plate [3-5], support ring [3-3] is connected on the cover plate [3-5], armouring cover [3-7] is connected in the middle part of support ring [3-3] by nut [3-2], this armouring cover [3-7] runs through cover plate [3-5] and bell body [3-6], and thermopair [3-1] is set in the armouring cover [3-7].
3. an electrical pure iron vacuum pulse hydrogen annealing method is characterized in that, may further comprise the steps:
Step 1, workpiece is cleaned with gasoline, make workpiece surface without dirt, oil stain;
Step 2, workpiece put into the effective heating area of body of heater [1];
Step 3, thermopair [3-1] is inserted effective heating area in the stove from bell [3], and tightening nuts [3-2] fixes thermopair;
Step 4, body of heater is vacuumized, make vacuum tightness reach 20Pa, afterwards workpiece is heated, make workpiece temperature rise to 800 ℃, make workpiece be warming up to 900 ± 20 ℃ of temperature since 800 ℃ of rate of heating with 50 ℃/h, in the process of heating, continue body of heater is vacuumized, make vacuum keep at 20Pa;
Step 5, pass into hydrogen in stove, and make the hydrogen that passes into keep 600s ~ 700s in stove, afterwards reacted waste gas is extracted out outside the stove, repeat afterwards this step 4h ~ 4.5h, temperature remains on 900 ± 20 ℃ in the stove in this process;
Step 6, workpiece is cooled off, since 900 ± 20 ℃, be cooled to 700 ℃ with 50 ℃/h speed of cooling, in this process, continue in stove, to pass into hydrogen, and make the hydrogen that passes in stove, keep 600s ~ 700s, afterwards reacted waste gas is extracted out outside the stove, repeated afterwards the above-mentioned process of leading to, arranging hydrogen;
Step 7, carry out furnace cooling since 700 ℃ to workpiece, after workpiece cools to 500 ℃ with the furnace, come out of the stove after utilizing watercooling jacket to be cooled to 200 ℃, finish the processing to electrical pure iron.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352199A (en) * | 2013-07-04 | 2013-10-16 | 南京摄炉(集团)有限公司 | High purity aluminizing furnace |
| CN109136800A (en) * | 2018-11-09 | 2019-01-04 | 中国石油大学(华东) | A kind of cycle pulse electric treatment device and method of niti-shaped memorial alloy monocrystalline |
| CN112126755A (en) * | 2020-08-21 | 2020-12-25 | 深圳市正灿科技有限公司 | Annealing method for electrician pure iron |
| CN112359186A (en) * | 2020-11-13 | 2021-02-12 | 沈阳航天新光集团有限公司 | Vacuum annealing method for magnetic material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362739Y (en) * | 2009-02-21 | 2009-12-16 | 奉化市光亮热处理电炉有限公司 | Metallic titanium coiled material vacuum thermal treatment furnace |
-
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- 2012-09-10 CN CN201210332246.XA patent/CN102899465B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362739Y (en) * | 2009-02-21 | 2009-12-16 | 奉化市光亮热处理电炉有限公司 | Metallic titanium coiled material vacuum thermal treatment furnace |
Non-Patent Citations (1)
| Title |
|---|
| 艾柳庭等: "热处理工艺对电铸电工纯铁性能的影响", 《钢铁》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352199A (en) * | 2013-07-04 | 2013-10-16 | 南京摄炉(集团)有限公司 | High purity aluminizing furnace |
| CN109136800A (en) * | 2018-11-09 | 2019-01-04 | 中国石油大学(华东) | A kind of cycle pulse electric treatment device and method of niti-shaped memorial alloy monocrystalline |
| CN109136800B (en) * | 2018-11-09 | 2020-12-01 | 中国石油大学(华东) | Cyclic pulse electric treatment device and method for nickel-titanium shape memory alloy single crystal |
| CN112126755A (en) * | 2020-08-21 | 2020-12-25 | 深圳市正灿科技有限公司 | Annealing method for electrician pure iron |
| CN112359186A (en) * | 2020-11-13 | 2021-02-12 | 沈阳航天新光集团有限公司 | Vacuum annealing method for magnetic material |
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