CN102978361A - Thermal treatment process of Invar alloy - Google Patents
Thermal treatment process of Invar alloy Download PDFInfo
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- CN102978361A CN102978361A CN2012104979163A CN201210497916A CN102978361A CN 102978361 A CN102978361 A CN 102978361A CN 2012104979163 A CN2012104979163 A CN 2012104979163A CN 201210497916 A CN201210497916 A CN 201210497916A CN 102978361 A CN102978361 A CN 102978361A
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Abstract
The invention discloses a thermal treatment process of an invar alloy. A gradient circular annealing de-stressing process is adopted and comprises the following steps of: 1) putting a work-piece in a thermal treatment furnace at a temperature of 250-400 DEG C and retaining for 1.5-2.5h; 2) taking the work-piece out of the thermal treatment furnace and cooling the work-piece in the air to the normal temperature; 3) putting the work-piece in the thermal treatment furnace at a temperature of 80-120 DEG C and retaining for 1.5-2.5h again; 4) putting the work-piece in a cooling furnace at a temperature of -50 to -30 DEG C and retaining for 1.5-2.5h again; 5) putting the work-piece in the thermal treatment furnace at a temperature of 80-120 DEG C and retaining for 1.5-2.5h again; and 6) taking the work-piece out of the thermal treatment furnace and cooling the work-piece in the air to the normal temperature. Through the adoption of the gradient circular annealing de-stressing process, the de-stressing effect is obviously enhanced. The thermal treatment process of the invar alloy is applied to key parts and components of a resonant cavity in a communication device, so that the adverse influence on the signal processing due to the temperature change is greatly reduced. The treatment process disclosed by the invention is reasonable in process, convenient and practical.
Description
Technical field
The present invention is a kind of thermal treatment process of Invar alloy, belongs to the renovation technique of the thermal treatment process of Invar alloy.
Background technology
Invar alloy also referred to as the Invar alloy, namely contains the iron alloy of 35.4% nickel, has very low thermal expansivity (between 20 ℃～20 ℃, the about 1.6 * 10-6/ of its mean value ℃) under the normal temperature, the characteristics such as good dimensional stability and easy demagnetization.From room temperature to 100 ℃, the thermal expansivity of alloy is about 1.1x10-6/ ℃, only is 1/10 of aluminium killed steel (being the AK material).Constant 350 ℃ of temperature range internal volumes.The Invar alloy is known as the king of metal, is the indispensable structured material of precision instrument and equipment.Because the Invar alloy is kind of an exotic materials, prior heat treatment process is difficult to eliminate fully its internal stress, and this has greatly limited the application of Invar alloy on the signal equipment component.The related communication equipment that can relate to a lot of use Invar alloys in the communications field, and its complete processing required that strict constraint qualification is arranged, especially for its stress removal aspect, because this directly has influence on the use properties of related product.At present, the employed thermal treatment process of most of manufacturing enterprises all is to adopt disposable annealing, is about to cool off to reach the destressing effect with Reasonable Speed after material is heated to the certain temperature maintenance.This has good effect for common metallic substance, for the singularity of this material of Invar alloy, is not clearly still.
Summary of the invention
The object of the invention is to consider the problems referred to above and a kind of thermal treatment process that can effectively eliminate the Invar alloy of the various residualinternal stresses of Invar alloy is provided.Treatment process of the present invention is reasonable, and is convenient and practical.
Technical scheme of the present invention is: the thermal treatment process of Invar alloy of the present invention, adopt gradient cycle annealing destressing technique, and specifically include following steps:
1) workpiece being put into 250 ℃～400 ℃ heat treatment furnace kept 1.5 hours～2.5 hours;
2) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature;
3) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
4) again workpiece is placed-30 ℃～-50 ℃ black furnace to keep 1.5 hours～2.5 hours;
5) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
6) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature.
Above-mentioned steps 1) workpiece being put into 350 ℃ heat treatment furnace kept 2 hours.
Above-mentioned steps 3) workpiece is placed 100 ℃ heat treatment furnace kept 3 hours.
Above-mentioned steps 4) workpiece is placed-40 ℃ black furnace to keep 3 hours.
Above-mentioned steps 5) workpiece is placed 100 ℃ heat treatment furnace kept 3 hours.
The present invention has significantly improved the effect of destressing owing to adopt the technique of gradient cycle annealing destressing, and the present invention is used for the key components and parts of signal equipment resonator cavity, has greatly reduced because of the disadvantageous effect of temperature variation to signal processing.The present invention is that a kind for the treatment of process is reasonable, the thermal treatment process of convenient and practical Invar alloy.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
Embodiment:
Schematic diagram of the present invention as shown in Figure 1, the thermal treatment process of Invar alloy of the present invention adopts gradient cycle annealing destressing technique, specifically includes following steps:
1) workpiece being put into 250 ℃～400 ℃ heat treatment furnace kept 1.5 hours～2.5 hours;
2) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature;
3) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
4) again workpiece is placed-30 ℃～-50 ℃ black furnace to keep 1.5 hours～2.5 hours;
5) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
6) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature.
In the present embodiment, above-mentioned steps 1) workpiece being put into 350 ℃ heat treatment furnace kept 2 hours.
In the present embodiment, above-mentioned steps 3) place 100 ℃ heat treatment furnace to keep 3 hours workpiece.
In the present embodiment, above-mentioned steps 4) workpiece is placed-40 ℃ black furnace kept 3 hours.
In the present embodiment, in the present embodiment, above-mentioned steps 5) place 100 ℃ heat treatment furnace to keep 3 hours workpiece.
The experiment proved that, adopt thermal treatment process of the present invention, its destressing effect has had significant raising, on the key components and parts that is applied to resonator cavity in the signal equipment, has greatly reduced because of the disadvantageous effect of temperature variation to signal processing.
Claims (5)
1. the thermal treatment process of an Invar alloy is characterized in that adopting gradient cycle annealing destressing technique, specifically includes following steps:
1) workpiece being put into 250 ℃～400 ℃ heat treatment furnace kept 1.5 hours～2.5 hours;
2) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature;
3) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
4) again workpiece is placed-30 ℃～-50 ℃ black furnace to keep 1.5 hours～2.5 hours;
5) again workpiece is placed 80 ℃～120 ℃ heat treatment furnace to keep 1.5 hours～2.5 hours;
6) workpiece is taken out heat treatment furnace, under air, be cooled to normal temperature.
2. the thermal treatment process of Invar alloy according to claim 1 is characterized in that above-mentioned steps 1) workpiece is put into 350 ℃ heat treatment furnace kept 2 hours.
3. the thermal treatment process of Invar alloy according to claim 1 is characterized in that above-mentioned steps 3) place 100 ℃ heat treatment furnace to keep 3 hours workpiece.
4. the thermal treatment process of Invar alloy according to claim 1 is characterized in that above-mentioned steps 4) workpiece is placed-40 ℃ black furnace kept 3 hours.
5. the thermal treatment process of Invar alloy according to claim 1 is characterized in that above-mentioned steps 5) place 100 ℃ heat treatment furnace to keep 3 hours workpiece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210497916.3A CN102978361B (en) | 2012-11-29 | 2012-11-29 | Thermal treatment process of Invar alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210497916.3A CN102978361B (en) | 2012-11-29 | 2012-11-29 | Thermal treatment process of Invar alloy |
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| CN102978361A true CN102978361A (en) | 2013-03-20 |
| CN102978361B CN102978361B (en) | 2014-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316575A (en) * | 2014-06-11 | 2016-02-10 | 丹阳市凯鑫合金材料有限公司 | Cold-heading wire for resonance rod and production method thereof |
| RU2610654C1 (en) * | 2015-11-05 | 2017-02-14 | Публичное акционерное общество специального машиностроения и металлургии "Мотовилихинские заводы" | Treatment method for invar alloy based on iron-nickel system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255168A (en) * | 1997-05-09 | 2000-05-31 | 东洋钢钣株式会社 | Invar alloy steel sheet material for shadow mask, method of production thereof, shadow mask and color picture tube |
| CN102041445A (en) * | 2011-01-21 | 2011-05-04 | 哈尔滨工业大学 | Preparation method of high-strength ultralow-expansion invar-based composite material |
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2012
- 2012-11-29 CN CN201210497916.3A patent/CN102978361B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255168A (en) * | 1997-05-09 | 2000-05-31 | 东洋钢钣株式会社 | Invar alloy steel sheet material for shadow mask, method of production thereof, shadow mask and color picture tube |
| CN102041445A (en) * | 2011-01-21 | 2011-05-04 | 哈尔滨工业大学 | Preparation method of high-strength ultralow-expansion invar-based composite material |
Non-Patent Citations (2)
| Title |
|---|
| 张建福等: "因瓦合金强化途径研究概况", 《金属功能材料》 * |
| 袁均平等: "变形与热处理对Invar合金组织及性能的影响", 《金属热处理》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316575A (en) * | 2014-06-11 | 2016-02-10 | 丹阳市凯鑫合金材料有限公司 | Cold-heading wire for resonance rod and production method thereof |
| RU2610654C1 (en) * | 2015-11-05 | 2017-02-14 | Публичное акционерное общество специального машиностроения и металлургии "Мотовилихинские заводы" | Treatment method for invar alloy based on iron-nickel system |
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| CN102978361B (en) | 2014-01-29 |
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Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xili Industrial Zone 4 second Dragon Palace Patentee after: Shenzhen Xintian Technology Co., Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili Industrial Zone 4 second Dragon Palace Patentee before: Shenzhen Xintian Technology Co., Ltd. |