CN105349809A - Preparing method for copper-chromium alloy - Google Patents
Preparing method for copper-chromium alloy Download PDFInfo
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- CN105349809A CN105349809A CN201510694120.0A CN201510694120A CN105349809A CN 105349809 A CN105349809 A CN 105349809A CN 201510694120 A CN201510694120 A CN 201510694120A CN 105349809 A CN105349809 A CN 105349809A
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- copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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Abstract
The invention discloses a preparing method for a copper-chromium alloy. The preparing method includes the following steps that 1, a copper-chromium intermediate alloy is prepared; 2, mixed powder A is prepared; 3, mixed powder B is prepared; 4, the copper-chromium intermediate alloy is added into a graphite crucible to be arranged in an induction furnace, and after heating smelting is carried out for 1 h to 2 h, the mixed powder A and the mixed power B are sequentially added and stirred; 5, a slag making material is added into the melt in the graphite crucible, and heat preserving is carried out; and 6, after the slag making material is removed, heat preserving and natural cooling are carried out. According to the preparing method, the copper-chromium alloy is obtained by preparing the copper-chromium intermediate alloy in advance, and therefore the casting technological properties are improved.
Description
Technical field
The present invention relates to a kind of preparation method of alloy, especially relate to a kind of preparation method of chromiumcopper, belong to alloy material preparing technical field.
Background technology
Chromiumcopper has intensity and hardness is high, thermal conductivity and the advantage such as electroconductibility is good and erosion resistance is strong, be widely used in preparing resistance electrode, contact material etc. and require high conductivity, the field of high strength, especially, in powerful vacuum high-voltage switch gear, chromiumcopper demonstrates wide application prospect especially.
For meeting the widespread demand of chromiumcopper, domestic and international relevant enterprise and professional person have carried out a large amount of test and study work to the preparation technology of chromiumcopper, make some progress.As the production method that denomination of invention is a kind of low oxygen low foreign impurity copper chromium alloy contact head, application number is a kind of method that patent discloses vacuum induction melting and vacuum electroslag remelting duplex technology production of copper Chrome metal powder of 200310105130.3, made the chromiumcopper electrode bar of low oxygen content by process for vacuum induction smelting, recycling vacuum electroslag remelting reduces the inclusion in chromiumcopper further.Chromiumcopper gas content prepared by this method is low, dense structure, uniform composition, high purity, but the consumable electrode adopted rod adopts high-purity metal powder preparation to form, and the vacuum system of Structure of need complexity and direct current arc power supply, complex process, production cost is high.Denomination of invention is the method for jet deposition manufactured copper/chromiumcopper composite contact material, application number be 201210153453.9 patent propose to utilize on spray deposition fine copper matrix after the pre-treatment and formed and the Cu-Cr alloy layer of Copper substrate mortise.The chromiumcopper matrix material prepared of this method due to heart portion be fine copper, when after the wearing and tearing of top layer, the wearing and tearing in heart portion will aggravate, and this method implementation process needs vacuumize; argon shield, and the pulverizing of alloy molten solution, atomization; the processes such as deposition, process cycle is longer, and production cost is higher.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of chromiumcopper, and make the chromiumcopper material prepared possess high strength & high electric-conduction, casting manufacturability is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of preparation method of chromiumcopper, comprises the following steps:
1) preparation of copper chromium master alloy: after taking copper and chromium, puts into plumbago crucible and is placed in induction furnace and is warming up to 1300-1350 DEG C, and after abundant fusing, stir, cooling obtains copper chromium master alloy;
2) preparation of powder mix A: cupric oxide 30-40 part, chromium sesquioxide 8-15 part, aluminium powder 6-12 part, Calcium Fluoride (Fluorspan) 1-3 part, molybdenum powder 1-3 part, nickel powder 2-6 part are fully mixed, stirs;
3) preparation of powder mix B: single nickel salt 0.5-2 part, magnesium sulfate 0.5-2 part, boric acid 0.3-1.2 part, aluminium powder 1-3 part, Calcium Fluoride (Fluorspan) 0.2-1 part are fully mixed, stirs;
4) added in plumbago crucible by copper chromium master alloy and be placed in induction furnace and be warming up to 1250-1350 DEG C, after adding powder mix A after melting 1-2h, insulation 2-3h, finally adds powder mix B, after furnace charge has all melted, fully stirs;
5) in the liquation in plumbago crucible, add the CaF through 800-1000 DEG C of high temperature sintering degasification
2with NaF slag making materials, insulation 10-20 minute;
6) going out after slag making materials in temperature is 550-650 DEG C, insulation 6-8h, naturally cooling.
Further, in described step 1), the weight ratio of chromium and copper is 1:20-25.
Further, the weight of described powder mix A is the 3-5% of copper chromium master alloy weight.
Further, the weight of described powder mix B is the 2.5-4.5% of copper chromium master alloy weight.
Further, CaF in described step 5)
2weight be the 0.8-1.2% of copper chromium master alloy weight, the weight of NaF is the 0.6-0.8% of copper chromium master alloy weight.
Beneficial effect of the present invention: the present invention obtains chromiumcopper by first preparing copper chromium master alloy, and Production Practice of Casting Technologies is improved, and product tensile strength increases 23%, and electric conductivity increases 17%.Can meet the property demand of high voltage electric appliance conductive pieces, part course of processing qualification rate reaches more than 80%.
Embodiment
Embodiment 1
The preparation method of chromiumcopper, comprises the following steps:
1) preparation of copper chromium master alloy: after taking copper and chromium, puts into plumbago crucible and is placed in induction furnace and is warming up to 1300 DEG C, and after abundant fusing, stir, cooling obtains copper chromium master alloy;
2) preparation of powder mix A: by the fully mixing of cupric oxide 30 parts, chromium sesquioxide 8 parts, aluminium powder 6 parts, 1 part, Calcium Fluoride (Fluorspan), molybdenum powder 1 part, nickel powder 2 parts, stir;
3) preparation of powder mix B: by the fully mixing of single nickel salt 0.5 part, 0.5 part, magnesium sulfate, boric acid 0.3 part, aluminium powder 1 part, 0.2 part, Calcium Fluoride (Fluorspan), stir;
4) added in plumbago crucible by copper chromium master alloy and be placed in induction furnace and be warming up to 1250 DEG C, after adding powder mix A after melting 1h, insulation 2h, finally adds powder mix B, after furnace charge has all melted, fully stirs;
5) in the liquation in plumbago crucible, add the CaF through 800 DEG C of high temperature sintering degasification
2with NaF slag making materials, be incubated 10 minutes;
6) going out after slag making materials in temperature is 55 DEG C, insulation 6h, naturally cooling.
In present embodiment, in step 1), the weight ratio of chromium and copper is 1:20.
In present embodiment, the weight of powder mix A is 3% of copper chromium master alloy weight.
In present embodiment, the weight of powder mix B is 2.5% of copper chromium master alloy weight.
In present embodiment, CaF in step 5)
2weight be the weight of 0.8%, NaF of copper chromium master alloy weight be 0.6% of copper chromium master alloy weight.
Embodiment 2
The preparation method of chromiumcopper, comprises the following steps:
1) preparation of copper chromium master alloy: after taking copper and chromium, puts into plumbago crucible and is placed in induction furnace and is warming up to 1320 DEG C, and after abundant fusing, stir, cooling obtains copper chromium master alloy;
2) preparation of powder mix A: by the fully mixing of cupric oxide 35 parts, chromium sesquioxide 12 parts, aluminium powder 8 parts, 2.4 parts, Calcium Fluoride (Fluorspan), molybdenum powder 2.7 parts, nickel powder 3.5 parts, stir;
3) preparation of powder mix B: by the fully mixing of single nickel salt 1.3 parts, 1.2 parts, magnesium sulfate, boric acid 0.6 part, aluminium powder 2.1 parts, 0.7 part, Calcium Fluoride (Fluorspan), stir;
4) added in plumbago crucible by copper chromium master alloy and be placed in induction furnace and be warming up to 1300 DEG C, after adding powder mix A after melting 1.5h, insulation 2.5h, finally adds powder mix B, after furnace charge has all melted, fully stirs;
5) in the liquation in plumbago crucible, add the CaF through 900 DEG C of high temperature sintering degasification
2with NaF slag making materials, be incubated 15 minutes;
6) going out after slag making materials in temperature is 600 DEG C, insulation 7h, naturally cooling.
In present embodiment, in step 1), the weight ratio of chromium and copper is 1:22.
In present embodiment, the weight of powder mix A is 4% of copper chromium master alloy weight.
In present embodiment, the weight of powder mix B is 3% of copper chromium master alloy weight.
In present embodiment, CaF in step 5)
2weight be the weight of 1.0%, NaF of copper chromium master alloy weight be 0.7% of copper chromium master alloy weight.
Embodiment 3
The preparation method of chromiumcopper, comprises the following steps:
1) preparation of copper chromium master alloy: after taking copper and chromium, puts into plumbago crucible and is placed in induction furnace and is warming up to 1350 DEG C, and after abundant fusing, stir, cooling obtains copper chromium master alloy;
2) preparation of powder mix A: by the fully mixing of cupric oxide 40 parts, chromium sesquioxide 15 parts, aluminium powder 12 parts, 3 parts, Calcium Fluoride (Fluorspan), molybdenum powder 3 parts, nickel powder 6 parts, stir;
3) preparation of powder mix B: by the fully mixing of single nickel salt 2 parts, 2 parts, magnesium sulfate, boric acid 1.2 parts, aluminium powder 3 parts, 1 part, Calcium Fluoride (Fluorspan), stir;
4) added in plumbago crucible by copper chromium master alloy and be placed in induction furnace and be warming up to 1350 DEG C, after adding powder mix A after melting 2h, insulation 3h, finally adds powder mix B, after furnace charge has all melted, fully stirs;
5) in the liquation in plumbago crucible, add the CaF through 1000 DEG C of high temperature sintering degasification
2with NaF slag making materials, be incubated 20 minutes;
6) going out after slag making materials in temperature is 650 DEG C, insulation 8h, naturally cooling.
In present embodiment, in step 1), the weight ratio of chromium and copper is 1:25.
In present embodiment, the weight of powder mix A is 5% of copper chromium master alloy weight.
In present embodiment, the weight of powder mix B is 4.5% of copper chromium master alloy weight.
In present embodiment, CaF in step 5)
2weight be the weight of 1.2%, NaF of copper chromium master alloy weight be 0.8% of copper chromium master alloy weight.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a preparation method for chromiumcopper, is characterized in that: comprise the following steps:
1) preparation of copper chromium master alloy: after taking copper and chromium, puts into plumbago crucible and is placed in induction furnace and is warming up to 1300-1350 DEG C, and after abundant fusing, stir, cooling obtains copper chromium master alloy;
2) preparation of powder mix A: cupric oxide 30-40 part, chromium sesquioxide 8-15 part, aluminium powder 6-12 part, Calcium Fluoride (Fluorspan) 1-3 part, molybdenum powder 1-3 part, nickel powder 2-6 part are fully mixed, stirs;
3) preparation of powder mix B: single nickel salt 0.5-2 part, magnesium sulfate 0.5-2 part, boric acid 0.3-1.2 part, aluminium powder 1-3 part, Calcium Fluoride (Fluorspan) 0.2-1 part are fully mixed, stirs;
4) added in plumbago crucible by copper chromium master alloy and be placed in induction furnace and be warming up to 1250-1350 DEG C, after adding powder mix A after melting 1-2h, insulation 2-3h, finally adds powder mix B, after furnace charge has all melted, fully stirs;
5) in the liquation in plumbago crucible, add the CaF through 800-1000 DEG C of high temperature sintering degasification
2with NaF slag making materials, insulation 10-20 minute;
6) going out after slag making materials in temperature is 550-650 DEG C, insulation 6-8h, naturally cooling.
2. the preparation method of a kind of chromiumcopper according to claim 1, is characterized in that: in described step 1), the weight ratio of chromium and copper is 1:20-25.
3. the preparation method of a kind of chromiumcopper according to claim 1, is characterized in that: the weight of described powder mix A is the 3-5% of copper chromium master alloy weight.
4. the preparation method of a kind of chromiumcopper according to claim 1, is characterized in that: the weight of described powder mix B is the 2.5-4.5% of copper chromium master alloy weight.
5. the preparation method of a kind of chromiumcopper according to claim 1, is characterized in that: CaF in described step 5)
2weight be the 0.8-1.2% of copper chromium master alloy weight, the weight of NaF is the 0.6-0.8% of copper chromium master alloy weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694120.0A CN105349809A (en) | 2015-10-25 | 2015-10-25 | Preparing method for copper-chromium alloy |
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| CN201510694120.0A CN105349809A (en) | 2015-10-25 | 2015-10-25 | Preparing method for copper-chromium alloy |
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| CN105349809A true CN105349809A (en) | 2016-02-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101586200A (en) * | 2009-06-23 | 2009-11-25 | 中国西电电气股份有限公司 | Casting copper-chromium alloy and preparation method thereof |
| CN101709393A (en) * | 2009-10-29 | 2010-05-19 | 重庆理工大学 | Method for preparing contact material having high performance and low mixed copper-chromium alloy content |
| CN103114218A (en) * | 2013-03-11 | 2013-05-22 | 武汉大学 | Preparation method of copper-chrome alloy |
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- 2015-10-25 CN CN201510694120.0A patent/CN105349809A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101586200A (en) * | 2009-06-23 | 2009-11-25 | 中国西电电气股份有限公司 | Casting copper-chromium alloy and preparation method thereof |
| CN101709393A (en) * | 2009-10-29 | 2010-05-19 | 重庆理工大学 | Method for preparing contact material having high performance and low mixed copper-chromium alloy content |
| CN103114218A (en) * | 2013-03-11 | 2013-05-22 | 武汉大学 | Preparation method of copper-chrome alloy |
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Application publication date: 20160224 |