CN101575688B - Permalloy vacuum heat treatment process - Google Patents
Permalloy vacuum heat treatment process Download PDFInfo
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- CN101575688B CN101575688B CN2008100497019A CN200810049701A CN101575688B CN 101575688 B CN101575688 B CN 101575688B CN 2008100497019 A CN2008100497019 A CN 2008100497019A CN 200810049701 A CN200810049701 A CN 200810049701A CN 101575688 B CN101575688 B CN 101575688B
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Abstract
The invention discloses a permalloy vacuum heat treatment process which sequentially adopts the following steps: a, opening an air charging valve, balancing inner air pressure and outer air pressure of a vacuum resistance furnace, placing a workpiece in the furnace, covering an inner cover, closing a furnace cover, and closing the air charging valve; b, starting a mechanical pump to open a low-vacuum valve, and completely opening the low-vacuum valve when the sound of the mechanical pump is stable; c, closing the low-vacuum valve when a vacuum degree reaches 5.0 E0, opening a diffuser pump, and then opening a high-vacuum pump; d, opening an ionization gauge when the vacuum degree reaches 5.0 E-1, measuring the value of the high vacuum degree; e, utilizing a control carbinet to start main heating when the vacuum degree reaches 5.0 E-2, raising the temperature to 100 DEG C by hand firstly, then starting automatic operation, keeping the temperature for 5 hours when the temperature rises to 1148 to 1152 DEG C; f, reducing the temperature to 578 to 582 DEG C by utilizing the time of 5.5 hours, and keeping the temperature for 1 hour; g, closing the main heating, closing the diffuser pumpwhen the temperature in the vacuum resistance furnace is reduced to 200 DEG C, and closing a mechanical pump valve when the temperature is reduced to be lower than 180 DEG C; and h, opening the furnace cover, taking out the workpiece to close the furnace cover. The entire process needs little investment, performance index of produced products can meet the requirements, and the product quality isstable and reliable.
Description
Technical field:
The invention belongs to permalloy vacuum heat treatment technics field.
Background technology:
Permalloy vacuum thermal treatment is to produce the soft magnet master operation, guarantees the uniform stability of soft magnet permeability.Present vacuum heat treatment process facility investment is big, complex technical process, cost height; Introduce a nitrogen treatment stove and need nearly 700,000 dollars, with regard to nearly 10 the heat treatment furnace equipment of needs, invest huge according to existing conventional industrial scale.
Summary of the invention:
The purpose of this invention is to provide that a kind of facility investment is less, the permalloy vacuum heat treatment process of stable and reliable product quality
To achieve these goals, the present invention includes: vacuum resistance furnace, water circulation cooling device, mechanical pump, diffusion pump, housing, adopt following steps to carry out successively:
A, open inflation valve, make the inside and outside air pressure balance of vacuum resistance furnace, workpiece is put into stove, cover inner cap, close bell, close inflation valve;
B, startup mechanical pump are opened low vacuum valve, after mechanical pump sound is steady, open low vacuum valve fully;
When c, vacuum tightness arrival 5.0E0, close low vacuum valve, open diffusion pump, open high vacuum valve again;
When d, vacuum tightness arrival 5.0E-1, open ionization gauge, measure condition of high vacuum degree numerical value;
When e, vacuum tightness arrival 5.0E-2, utilize housing to open main heating, manually be warmed up to 100 ℃ earlier, open automatic operation again, when temperature rises to 1148-1152 ℃, be incubated 5 hours;
F, be cooled to 578-582 ℃, be incubated 1 hour with 5.5 hours time averages;
G, close main heating, when temperature is reduced to 200 ℃ in the vacuum resistance furnace, close diffusion pump, cool to below 180 ℃, close mechanical pump valve door;
H, open bell, bell is closed after taking out workpiece.
Because the present invention has adopted the cheap vacuum resistance furnace of price comparison, water circulation cooling device, mechanical pump, diffusion pump etc., whole technology investment is less, and the product performance index of producing can meet the demands, and stable and reliable product quality.
Embodiment:
Invention comprises: vacuum resistance furnace, water circulation cooling device, mechanical pump, diffusion pump, housing, each parts are interconnected to form production technique.At first, open inflation valve, make the inside and outside air pressure balance of vacuum resistance furnace, bell is opened, take out inner cap, workpiece is put into stove, cover inner cap, close bell, close inflation valve.Check whether the water circulation cooling device water route is normal.Start mechanical pump, slowly open low vacuum valve, after mechanical pump sound is steady, open low vacuum valve fully.When vacuum tightness arrives 5.0E0, close low vacuum valve, open diffusion pump, open high vacuum valve again.When vacuum tightness arrives 5.0E-1, open ionization gauge, measure condition of high vacuum degree numerical value; When vacuum tightness arrives 5.0E-2, utilize housing to open main heating, manually be warmed up to 100 ℃ earlier, open automatic operation again, when temperature rises to 1150 ℃, be incubated 5 hours.Be cooled to 580 ℃ with 5.5 hours time average then, be incubated 1 hour; Close main heating, when temperature is reduced to 200 ℃ in the vacuum resistance furnace, close diffusion pump, cool to below 180 ℃, close mechanical pump valve door.Open bell at last, behind the taking-up workpiece bell is closed, open mechanical pump, vacuum is closed mechanical pump valve door and water circulation cooling device behind 5.0E-0.Handling the back product performance index is: initial magnetic permeability＞24000 height/Austria; High permeability＞200000 height/Austria; Rectify object for appreciation power＜0.15 oersted; Magnetic induction density＞0.75 tesla.The qualified product that this invention can the quality of production be stablized, satisfied the demand.
Claims (1)
1. permalloy vacuum heat treatment process, comprising: vacuum resistance furnace, water circulation cooling device, mechanical pump, diffusion pump, housing is characterized in that adopting successively following steps to carry out:
A, open inflation valve, make the inside and outside air pressure balance of vacuum resistance furnace, workpiece is put into stove, cover inner cap, close bell, close inflation valve;
B, startup mechanical pump are opened low vacuum valve, after mechanical pump sound is steady, open low vacuum valve fully;
When c, vacuum tightness arrival 5.0E0, close low vacuum valve, open diffusion pump, open high vacuum valve again;
When d, vacuum tightness arrival 5.0E-1, open ionization gauge, measure condition of high vacuum degree numerical value;
When e, vacuum tightness arrival 5.0E-2, utilize housing to open main heating, manually be warmed up to 100 ℃ earlier, open automatic operation again, when temperature rises to 1148-1152 ℃, be incubated 5 hours;
F, be cooled to 578-582 ℃, be incubated 1 hour with 5.5 hours time averages;
G, close main heating, when temperature is reduced to 200 ℃ in the vacuum resistance furnace, close diffusion pump, cool to below 180 ℃, close mechanical pump valve door;
H, open bell, bell is closed after taking out workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100497019A CN101575688B (en) | 2008-05-07 | 2008-05-07 | Permalloy vacuum heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100497019A CN101575688B (en) | 2008-05-07 | 2008-05-07 | Permalloy vacuum heat treatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101575688A CN101575688A (en) | 2009-11-11 |
| CN101575688B true CN101575688B (en) | 2010-08-25 |
Family
ID=41270760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100497019A Expired - Fee Related CN101575688B (en) | 2008-05-07 | 2008-05-07 | Permalloy vacuum heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101575688B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056313U (en) * | 1988-11-27 | 1990-04-25 | 中山大学 | Electromagnetic starting tank type sprayer |
| CN1096367A (en) * | 1993-06-10 | 1994-12-14 | 航空航天工业部秦岭电气公司 | Magnetism and insulation property treating method for stator magenetic core of automatic recording instrument |
| EP1283275A1 (en) * | 2000-09-29 | 2003-02-12 | Nippon Yakin kogyo Co., Ltd. | Fe-Ni based permalloy and method of producing the same and cast slab |
-
2008
- 2008-05-07 CN CN2008100497019A patent/CN101575688B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056313U (en) * | 1988-11-27 | 1990-04-25 | 中山大学 | Electromagnetic starting tank type sprayer |
| CN1096367A (en) * | 1993-06-10 | 1994-12-14 | 航空航天工业部秦岭电气公司 | Magnetism and insulation property treating method for stator magenetic core of automatic recording instrument |
| EP1283275A1 (en) * | 2000-09-29 | 2003-02-12 | Nippon Yakin kogyo Co., Ltd. | Fe-Ni based permalloy and method of producing the same and cast slab |
Non-Patent Citations (3)
| Title |
|---|
| JP昭58-221251A 1983.12.22 |
| JP昭63-149361A 1988.06.22 |
| JP特开平5-287423A 1993.11.02 |
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| Publication number | Publication date |
|---|---|
| CN101575688A (en) | 2009-11-11 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20140507 |