CN110158003B - Solid solution aging heat treatment method for electric brush contact of conductive slip ring for satellite - Google Patents
Solid solution aging heat treatment method for electric brush contact of conductive slip ring for satellite Download PDFInfo
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- CN110158003B CN110158003B CN201910379817.7A CN201910379817A CN110158003B CN 110158003 B CN110158003 B CN 110158003B CN 201910379817 A CN201910379817 A CN 201910379817A CN 110158003 B CN110158003 B CN 110158003B
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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Abstract
The invention discloses a solid solution aging heat treatment method of a conductive slip ring electric brush contact for a satellite, which comprises the following steps: the preparation method comprises the following steps: cleaning the surface dirt and oil stain of the contact by using a cleaning agent, an organic solvent (such as acetone and alcohol) and the like, drying the contact in an oven at the temperature of less than 100 ℃ or drying the contact by using anhydrous and oilless compressed air to ensure that the surface is clean and dry; solid solution step: binding the contact with a stainless steel wire mesh, vertically suspending the contact in an effective heating area of a hearth for heating; and after heat preservation is finished, quickly transferring the part from the heating furnace to cooling water for aging: the contact is arranged in a clean stainless steel material box and is placed in an effective heating area of a hearth for heating; cooling along with the furnace after heat preservation is finished, and discharging at the temperature of less than or equal to 100 ℃. Through the solid solution aging treatment of the conductive slip ring electric brush contact for the satellite, the phenomenon of uneven hardness in the part cold heading forming process can be eliminated, the single-piece hardness uniformity and the batch hardness uniformity of the contact part are improved, and the use requirement is met.
Description
Technical Field
The invention relates to a solid solution aging heat treatment method of a conductive slip ring electric brush contact for a satellite, belonging to the technical field of heat treatment.
Background
The disc type conductive slip ring realizes electric power and signal transmission through relative sliding contact between the electric brush and the bus disc. The electric brush component consists of a reed and a contact, and the reed and the contact are connected in a welding mode. In the whole friction pair design, the contact is required to be always in sliding contact with a ring channel of the confluence disc, so that the hardness of the contact directly influences the service life of a disc type conductive slip ring product.
The electric brush contact of the conductive slip ring for the satellite is made of AuCuAgZn17-7-1 alloy, the raw material is a drawn wire, the procedures of plasma polishing and the like are carried out after cold heading forming, and finally the electric brush contact is welded with a reed. On one hand, in the cold heading process of the contact, the deformation degree of the center and the edge is not uniform, so that the material structure performance is different, and the hardness distribution of the contact is not uniform; on the other hand, the welding temperature of the contact and the reed is higher, so that the hardness of the contact is influenced to a certain extent, and the subsequent friction with the confluence disc is further influenced. To avoid the adverse effects of contact hardness changes on the frictional properties, it is desirable to make the contact hardness uniform and stable.
The invention content is as follows:
the invention provides a solid solution aging heat treatment method of a conductive slip ring brush contact for a satellite, which can effectively keep the consistency of the core hardness and the surface hardness of the AuCuAgZn17-7-1 contact.
The invention relates to a solid solution aging heat treatment method of a conductive slip ring electric brush contact for a satellite, which is divided into three steps of production preparation, solid solution treatment and aging treatment aiming at the solid solution aging heat treatment of an alloy conductive slip ring contact, and the method comprises the following specific steps:
the preparation method comprises the following steps: cleaning dirt and oil stains on the surface of the contact by using a cleaning agent and an organic solvent, and drying in an oven at the temperature of less than 100 ℃ or drying by using anhydrous and oilless compressed air to ensure that the surface is clean and dry;
solid solution step: binding the contact with a stainless steel wire mesh, vertically suspending the contact in an effective heating area of a hearth for heating; after the heat preservation is finished, quickly transferring the part from the heating furnace to cooling water;
aging: the contact is arranged in a clean stainless steel material box and is placed in an effective heating area of a hearth for heating; cooling along with the furnace after heat preservation is finished, and discharging at the temperature of less than or equal to 100 ℃. Preferably, the first and second liquid crystal materials are,
s1 preparing:
the parts are cleaned by cleaning agent and organic solvent (such as acetone and alcohol), and dried in oven at 100 deg.C or dried with anhydrous and oilless compressed air to ensure surface cleanness and dryness.
S2 solid solution:
s21 wrapping the contact with stainless steel wire net.
And (3) at least preserving the heat of the S22 ammonia furnace for 30min at the set temperature, introducing ammonia decomposition gas, and preserving the heat for 30 min.
S23, vertically suspending the contact in the effective heating area of the hearth, and keeping the temperature at 620-820 ℃ for 15-60 min.
And S24, after the heat preservation is finished, quickly transferring the part from the heating furnace to cooling water.
And S25 drying the parts by compressed air to ensure the surface to be dry.
S3 aging:
s31 the contact is loaded in a clean stainless steel box and placed in the effective heating area of the hearth.
S32, the equipment is vacuumized to enable the air pressure in the furnace to be less than 20Pa so as to exhaust the air in the furnace. Then high-purity nitrogen is introduced into the hearth, and the pressure is not less than 0.1 MPa.
S33, heating at a speed of less than or equal to 15 ℃/min, wherein the aging temperature is 200-400 ℃, and the heat preservation time is 3-9 h. Cooling along with the furnace after heat preservation is finished, and discharging the steel plate at the temperature of less than or equal to 100 ℃.
The invention relates to a solid solution aging heat treatment method of a conductive slip ring brush contact for a satellite, which is a study on a solid solution aging heat treatment process of an AuCuAgZn17-7-1 contact (75% Au-17% Cu-7% Ag-1% Zn). By the treatment of the method, the core hardness and the surface hardness of the AuCuAgZn17-7-1 contact can be kept consistent, and the contact can be stable in hardness and is not influenced by welding temperature and use environment. The hardness range of the contact subjected to solid solution aging treatment is HV 200-HV 320, and the contact can reach different hardness values through adjustment of process parameters.
Description of the drawings:
FIG. 1 is a flow chart of a solution aging heat treatment method of a conductive slip ring brush contact for a satellite.
The specific implementation mode is as follows:
for the purpose of illustrating the technical content, the achieved objects and the effects of the invention in detail, the following description is taken in conjunction with the accompanying drawings.
Example 1:
referring to fig. 1, the method includes the following steps:
step S1 is prepared, and is explained in detail as follows:
the parts are cleaned by cleaning agent and organic solvent (such as acetone and alcohol), and dried in oven at 100 deg.C or dried with anhydrous and oilless compressed air to ensure surface cleanness and dryness.
A solutionizing step S2, comprising steps S21 through S24, detailed as follows:
s21 wrapping the contact with stainless steel wire net.
And (3) at least preserving the heat of the S22 ammonia furnace for 30min at the set temperature, introducing ammonia decomposition gas, and preserving the heat for 30 min.
S23 vertically suspending the contact in the effective heating area of the hearth, and keeping the temperature at 670 ℃ for 30 min.
And S24, after the heat preservation is finished, quickly transferring the part from the heating furnace to cooling water.
And S25 drying the parts by compressed air to ensure the surface to be dry.
A solutionizing step S3, comprising steps S31 through S33, detailed as follows:
s31 the contact is loaded in a clean stainless steel box and placed in the effective heating area of the hearth.
S32, the equipment is vacuumized to enable the air pressure in the furnace to be less than 20Pa so as to exhaust the air in the furnace. Then high-purity nitrogen is introduced into the hearth, and the pressure is 0.14 MPa.
S33, heating at a speed of less than or equal to 15 ℃/min, wherein the aging temperature is 300 ℃, and the heat preservation time is 6 h. Cooling along with the furnace after heat preservation is finished, and discharging the steel plate at the temperature of less than or equal to 100 ℃.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV300 to HV 310.
Example 2:
the aging temperature in step S33 in example 1 was changed to 200 ℃ and the other steps were the same as in example 1.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV300 to HV 312.
Example 3:
the aging temperature in step S33 in example 1 was changed to 250 ℃ and the other steps were the same as in example 1.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV305 to HV 320.
Example 4:
the aging temperature in step S33 in example 1 was changed to 320 ℃, and the other steps were the same as in example 1.
The hardness of the contact after the solution aging heat treatment according to the above method is HV279 to HV 285.
Example 5:
the aging temperature in step S33 in example 1 was changed to 350 ℃ and the other steps were the same as in example 1.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV214 to HV 228.
Example 6:
the aging temperature in step S33 in example 1 was changed to 400 ℃ and the other steps were the same as in example 1.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV200 to HV 217.
Example 7:
the solution temperature in step S23 in example 1 was changed to 820 ℃ and the other steps were the same as in example 1.
The hardness of the contact after the solution-aging heat treatment according to the above method is HV300 to HV 310.
Example 8:
the aging temperature in the step S33 in the embodiment 1 is changed to 320 ℃, the heat preservation time is changed to 9h, and other steps are the same as the embodiment 1.
The hardness of the contact after the solution aging heat treatment by the above method is HV268 to HV 279.
Claims (7)
1. A solid solution aging heat treatment method for a conductive slip ring brush contact for a satellite is characterized by comprising the following steps: the method comprises the following steps:
the preparation method comprises the following steps: cleaning dirt and oil stains on the surface of the contact by using a cleaning agent and an organic solvent, and drying in an oven at the temperature of less than 100 ℃ or drying by using anhydrous and oilless compressed air to ensure that the surface is clean and dry;
solid solution step: binding the contact with a stainless steel wire mesh, vertically suspending the contact in an effective heating area of a hearth for heating; after the heat preservation is finished, quickly transferring the part from the heating furnace to cooling water; the temperature of the solution treatment is 620-820 ℃, and the heat preservation time is 15-60 min;
aging: the contact is arranged in a clean stainless steel material box and is placed in an effective heating area of a hearth for heating; cooling along with the furnace after heat preservation is finished, and discharging at the temperature of less than or equal to 100 ℃; the aging temperature is 200-400 ℃, and the heat preservation time is 3-9 h;
the contact component system is AuCuAgZn 17-7-1.
2. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 1, characterized in that: the cleaning agent and the organic solvent adopt acetone and alcohol.
3. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 1, characterized in that: the equipment adopted by the solid solution treatment is an ammonia furnace, and the protective atmosphere is ammonia decomposition gas.
4. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 3, characterized in that: before the solid solution treatment, the ammonia furnace is kept at the set temperature for at least 30min, and is kept at the temperature for 30min after ammonia decomposition gas is introduced.
5. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 4, characterized in that: the purity of the ammonia gas is more than or equal to 99.9 percent.
6. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 1, characterized in that: the equipment adopted by the aging treatment is a protective atmosphere furnace, and the atmosphere in the furnace is high-purity nitrogen.
7. The solution aging heat treatment method of the brush contact of the conductive slip ring for the satellite according to claim 6, characterized in that: the pressure of the high-purity nitrogen is not less than 0.1MPa, and the purity is more than or equal to 99.999%.
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| DE102020206620A1 (en) * | 2020-05-27 | 2021-12-02 | Dr. Alex Wellendorff Gmbh & Co. Kg | Alloy, in particular noble metal alloy, semifinished product made from such an alloy, piece of jewelry with at least one such semifinished product, and method for producing such a semifinished product |
| CN112725653A (en) * | 2020-12-21 | 2021-04-30 | 有研亿金新材料有限公司 | Novel high-plasticity gold-based electric brush material and preparation method thereof |
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| DE2638837C3 (en) * | 1976-08-28 | 1979-06-07 | W.C. Heraeus Gmbh, 6450 Hanau | Gold-based dental solder alloy |
| DE3414128A1 (en) * | 1984-04-14 | 1985-12-12 | Heraeus Edelmetalle Gmbh, 6450 Hanau | Coloured-gold alloys |
| CN103122422A (en) * | 2013-03-03 | 2013-05-29 | 贵研铂业股份有限公司 | Au-based friction pair pairing material |
| CN104201019B (en) * | 2014-08-19 | 2016-05-11 | 张树堂 | Manufacturing process of Ag-ZnO cupric oxide electrical contact and products thereof |
| CN107916344A (en) * | 2017-11-28 | 2018-04-17 | 广州宇智科技有限公司 | The high-strength Au Li Rh gold lithium alloys of contact material |
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