CN109777995A - A kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze - Google Patents
A kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze Download PDFInfo
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- CN109777995A CN109777995A CN201711112554.0A CN201711112554A CN109777995A CN 109777995 A CN109777995 A CN 109777995A CN 201711112554 A CN201711112554 A CN 201711112554A CN 109777995 A CN109777995 A CN 109777995A
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Abstract
The invention discloses a kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronzes.The weight percentage of each ingredient in the aluminium bronze are as follows: aluminium 6.5-12.0%, iron 2.0-5.5%, nickel 2.5-6.0%, manganese 0.5-3.0%, titanium 0.2-0.3%, remaining is copper.Aluminium bronze of the invention be the corresponding raw metal of each ingredient through founding, hot forging process, Equal Channel Angular Pressing and made of.Aluminium bronze of the invention is under -196 DEG C of low temperature, with the impact flexibility more excellent than room temperature, comprehensive mechanical property is significantly improved, it is highly suitable for the manufacture of the fields such as aerospace low temperature environment wear-resisting spare part, has great meaning to reducing production cost, improving product quality and service life of equipment etc..
Description
Technical field
The present invention relates to a kind of to have both high-intensitive, high impact toughness wear-resisting aluminium bronze conjunction at a temperature of -196 DEG C of low temperature
Gold belongs to metal material and its preparation technical field.
Background technique
It is long-standing to the research of wear-resistant copper alloy material both at home and abroad, there are many alloy material come out, as complex brass,
The alloys such as tin bronze, aluminium bronze.These types of alloy is compared, aluminium bronze due to higher intensity, hardness and wearability,
There are the excellent performances such as corrosion-resistant simultaneously, can be widely applied to the fields such as aerospace, military affairs, petrochemical industry, communications and transportation
Wear part.Such as QA110-3-1.5 and QA110-4-4 alloy is used for gear, axle sleeve, bearing；QA19-4-4-2 alloy is used
In propeller, valve, impeller etc.；The complicated bronze of Cu14A1-X high alumina achieves original effect for mold materials etc..
With the rapid development of modern aerospace technology, some extreme environment wear parts are to aluminium bronze in liquid
Mechanical property at a temperature of nitrogen proposes requirement more higher than room temperature.It is well known that current room temperature commonly uses wear-resisting aluminium bronze
Generally be heat-treated after casting or extrude bar.However, mechanical property when these aluminium bronze liquid nitrogen temperature (- 196 DEG C)
Energy, especially low-temperature impact toughness are lower, cause part to reduce in the service life of low temperature environment, or be not able to satisfy use and want
It asks.The reason for this is that commonly using wear-resisting aluminium bronze in molding preparation process, eutectoid reaction occurs when 567 DEG C: β=α+γ
2, the eutectoid α+γ 2 generated belongs to the brittlement phase of lamellar structure, and the wear-resisting property of material can be improved when using under room temperature,
But the brittleness that aluminium bronze is increased when using at low temperature, reduces the impact flexibility of alloy.We demonstrate,prove experimental study
Bright, the Impact energy Ak v value of wear-resisting aluminium bronze at room temperature is in 50J or so, and Akv value is reduced to deficiency at -196 DEG C
25J is greatly reduced compared with room temperature.
In recent years, some sub-micron obtained by severe plastic deformation or nano structured alloy are high-strength due to being provided simultaneously with
Degree and high-ductility, obtain extensive concern.It is reported that A1-Si alloy is after 32 inferior channel pressings deformations, crystal grain is obtained
Refinement, brittleness Si particle are broken, and it is original 10 times that ballistic work, which increases,.In addition, when temperature is reduced from room temperature, coarse grained metal
The ballistic work of titanium constantly reduces；And after equal channel pressings and cold-rolling deformation, nanostructured metal titanium is reduced with temperature,
Ballistic work does not reduce not only, significantly improves instead.
Summary of the invention
The purpose of the present invention is to provide a kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronzes, and the alloy is in -196 DEG C of temperature
There is down excellent mechanical performance, especially there is high low-temperature impact work, intensity is high, and wearability is good.
Another object of the present invention is to provide a kind of preparation methods of low-temperature high-strength high-ductility abrasion-proof aluminium bronze.
To achieve the above object, the invention adopts the following technical scheme:
A kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze, the weight percentage of each ingredient in the aluminium bronze are as follows: aluminium
6.5-12.0%, iron 2.0-5.5%, nickel 2.5-6.0%, manganese 0.5-3.0%, titanium 0.2-0.3%, remaining is copper.
The aluminium bronze is by the corresponding raw metal of each ingredient through founding, hot forging process, Equal-channel Angular Pressing work
Skill and it is manufactured.
Preferably, in the aluminium bronze each ingredient weight percentage are as follows: aluminium 7.0-11.0%, iron 2.0-
4.5%, nickel 2.5-4.5%, manganese 0.5-2.0%, titanium 0.2-0.25%, remaining is copper.
A kind of preparation method of the low-temperature high-strength high-ductility abrasion-proof aluminium bronze, comprising the following steps:
(1) according to alloying component ingredient, melting, smelting temperature 1100-1200 founding: are carried out in medium frequency induction melting furnace
DEG C, when melting, solvent, which is added, makes the alloy of fusing be covered and be refined, stand, skim after pour into the ingot casting of Φ 200mm；
(2) hot forging process: after ingot casting railway carriage scale, 3-4 passage forging deformation is carried out at a temperature of 750-900 DEG C, is forged every time
Ingot casting is overturn to 90 ° in the same direction, overall reduction 60-90% is finally air-cooled to room temperature, and copper alloy forging is made after making；
(3) Equal Channel Angular Pressing: being cut into pole shape blank for copper alloy forging, uses the interior angle to be for 90 °, exterior angle
35-40 ° of equal channel angular extrusion die carries out 3-5 passage Equal-channel Angular Pressing, and squeezing temperature is 650-800 DEG C, every time
Blank is rotated by 90 ° in the same direction after equal channel pressings deformation, can be obtained low-temperature high-strength high-ductility abrasion-proof aluminium bronze.
In the step (1), before melting, alloy material first is made in copper, aluminium, iron, nickel, manganese, titanium；When melting, once
The alloy material is added in property.
In the step (2), draught per pass 20-30%.
In the step (3), per inferior channel pressings mode are as follows: clean blank and mold with pure machine oil or acetone and do
Only, surface uniformly coats one layer of graphitic lubricant；Then blank is put into mold and is warming up to 650-800 DEG C with furnace, keep the temperature 10-
After 15 minutes, an inferior channel pressings deformation is carried out.
The present invention has the advantages that
1) method that the present invention is combined using hot forging process and Equal Channel Angular Pressing, ingot casting are crisp after hot forging deformation
Property mutually be tentatively crushed, crystal grain is tentatively refined, and alloy ductility is tentatively improved；Guarantee to turn in channels such as heatings later
In the extrusion process of angle, while with good plastic deformation ability, comprehensive mechanical property is significantly improved alloy.
2) aluminium bronze of the invention has the impact flexibility more excellent than room temperature under -196 DEG C of low temperature, comprehensive
Mechanical property is significantly improved, and is highly suitable for the manufacture of the fields such as aerospace low temperature environment wear-resisting spare part, to drop
Low production cost, raising product quality and service life of equipment etc. have great meaning.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
Its technological process of production are as follows: ingredient-founding-hot forging-Equal-channel Angular Pressing-finished product
Detailed process are as follows: by mass percent be 84.3% copper, 9.0% aluminium, 2.5% iron, 3.5% nickel, 0.5%
Manganese, 0.2% titanium alloy material is made, using medium frequency induction melting furnace melting, smelting temperature is 1100-1200 DEG C.It is disposable to add
Enter the alloy material and solvent (glass, ice crystal), which is added, makes the alloy of fusing be covered and be refined.Stand, skim after pour into
The ingot casting of Φ 200mm.After ingot casting railway carriage scale, forging deformation is carried out at a temperature of 850 DEG C, is forged in one direction first
It makes, reduction in pass 25-30%；Then blank is overturn 90 °, then carries out primary and previous identical forging；According to said method
3 forgings are carried out altogether, and overall reduction 80% is finally air-cooled to room temperature, copper alloy forging is made.
By the wire cutting of copper alloy forging at the pole blank of diameter 10mm, length 80mm, after being cleaned with acetone, blank surface
Coat one layer of graphitic lubricant.After die surface is cleaned and coats graphitic lubricant, blank is put into mold with furnace
After being warming up to 800 DEG C, heat preservation 15 minutes, the deformation of the channel pressings such as first time is carried out.Then by an extruded rod and die surface
Graphitic lubricant is coated again, after extruded rod is rotated by 90 ° at same direction along extruding axis, is warming up to 800 DEG C again, heat preservation
Second is carried out after 15 minutes waits channel pressings deformation.So circulation, carries out altogether 4 passage equal channel angular pressing texturings, i.e.,
It can get low-temperature high-strength high-ductility abrasion-proof aluminium bronze finished product.
Embodiment 2
Its technological process of production are as follows: ingredient-founding-hot forging-Equal-channel Angular Pressing-finished product
Detailed process are as follows: by mass percent be 82.8% copper, 11.0% aluminium, 3.0% iron, 2.5% nickel, 0.5%
Manganese, 0.2% titanium alloy material is made, using medium frequency induction melting furnace melting, smelting temperature is 1100-1200 DEG C.Disposably
The alloy material is added and solvent (glass, ice crystal), which is added, makes the alloy of fusing be covered and be refined.Stand, skim after be poured
At the ingot casting of Φ 200mm.After ingot casting railway carriage scale, forging deformation is carried out at a temperature of 800 DEG C, is carried out in one direction first
Forging, reduction in pass 20-25%；Then blank is overturn 90 °, then carries out primary and previous identical forging；By this side
Method carries out altogether 4 forgings, and overall reduction 85% is finally air-cooled to room temperature, copper alloy forging is made.
By the wire cutting of copper alloy forging at the pole blank of diameter 10mm, length 80mm, after being cleaned with acetone, blank surface
Coat one layer of graphitic lubricant.After die surface is cleaned and coats graphitic lubricant, blank is put into mold with furnace
After being warming up to 700 DEG C, heat preservation 15 minutes, the deformation of the channel pressings such as first time is carried out.Then by an extruded rod and die surface
Graphitic lubricant is coated again, after extruded rod is rotated by 90 ° at same direction along extruding axis, is warming up to 700 DEG C again, heat preservation
Second is carried out after 15 minutes waits channel pressings deformation.So circulation, carries out altogether 4 passage equal channel angular pressing texturings, i.e.,
It can get low-temperature high-strength high-ductility abrasion-proof aluminium bronze finished product.
Ballistic work of the Cu alloy material prepared by the present invention under -196 DEG C of low temperature is greater than 50J, closes to commonly use wear-resisting copper
More than 2 times of golden material；And QA110-3-1.5 extruded bars are compared, tensile strength, the yield strength of the developed material of the present invention
It is all significantly increased with elongation.Therefore, which is a kind of excellent low-temperature high-strength high-ductility Cu alloy material, is greatly improved zero
The service ability of part or equipment under -196 DEG C of cold environmental conditions.
The present invention includes but is not limited to above embodiments, it is all carried out under the spirit and principles in the present invention it is any etc.
With replacement or local improvement, all will be regarded as within protection scope of the present invention.
Claims (8)
1. a kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze, which is characterized in that the weight hundred of each ingredient in the aluminium bronze
Divide content are as follows: aluminium 6.5-12.0%, iron 2.0-5.5%, nickel 2.5-6.0%, manganese 0.5-3.0%, titanium 0.2-0.3%, remaining is
Copper.
2. low-temperature high-strength high-ductility abrasion-proof aluminium bronze according to claim 1, which is characterized in that the aluminium bronze
Be the corresponding raw metal of each ingredient through founding, hot forging process, Equal Channel Angular Pressing and made of.
3. low-temperature high-strength high-ductility abrasion-proof aluminium bronze according to claim 1 or 2, which is characterized in that the aluminium bronze
The weight percentage of each ingredient in alloy are as follows: aluminium 7.0-11.0%, iron 2.0-4.5%, nickel 2.5-4.5%, manganese 0.5-
2.0%, titanium 0.2-0.25%, remaining is copper.
4. the preparation method of low-temperature high-strength high-ductility abrasion-proof aluminium bronze, feature described in a kind of any one of claim 1-3
It is, comprising the following steps:
(1) according to alloying component ingredient, melting, smelting temperature 1100-1200 founding: are carried out in medium frequency induction melting furnace
DEG C, when melting, solvent, which is added, makes the alloy of fusing be covered and be refined, stand, skim after pour into the ingot casting of Φ 200mm；
(2) hot forging process: after ingot casting railway carriage scale, 3-4 passage forging deformation is carried out at a temperature of 750-900 DEG C, is forged every time
Ingot casting is overturn to 90 ° in the same direction, overall reduction 60-90% is finally air-cooled to room temperature, and copper alloy forging is made after making；
(3) Equal Channel Angular Pressing: being cut into pole shape blank for copper alloy forging, uses the interior angle to be for 90 °, exterior angle
35-40 ° of equal channel angular extrusion die carries out 3-5 passage Equal-channel Angular Pressing, and squeezing temperature is 650-800 DEG C, every time
Blank is rotated by 90 ° in the same direction after equal channel pressings deformation, can be obtained low-temperature high-strength high-ductility abrasion-proof aluminium bronze.
5. the preparation method according to claim 4, which is characterized in that in the step (1), before melting, first by copper,
Alloy material is made in aluminium, iron, nickel, manganese, titanium；When melting, it is added at one time the alloy material.
6. preparation method according to claim 5, which is characterized in that the copper, aluminium, iron, nickel, manganese, the purity of titanium are big
In 99.9%.
7. the preparation method according to claim 4, which is characterized in that in the step (2), draught per pass is
20-30%.
8. the preparation method according to claim 4, which is characterized in that in the step (3), per inferior channel pressings side
Formula are as follows: clean up blank and mold with pure machine oil or acetone, surface uniformly coats one layer of graphitic lubricant；Then by blank
It is put into mold after being warming up to 650-800 DEG C, heat preservation 10-15 minutes with furnace, carries out an inferior channel pressings deformation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711112554.0A CN109777995A (en) | 2017-11-13 | 2017-11-13 | A kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze |
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| CN201711112554.0A CN109777995A (en) | 2017-11-13 | 2017-11-13 | A kind of low-temperature high-strength high-ductility abrasion-proof aluminium bronze |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238616A (en) * | 2019-06-24 | 2019-09-17 | 桐庐明晟五金塑料制品厂 | One Albatra metal sliding block and preparation method thereof |
| CN111676388A (en) * | 2020-08-01 | 2020-09-18 | 贵溪骏达特种铜材有限公司 | Method for improving mechanical property of aluminum bronze |
| CN114318052A (en) * | 2021-12-16 | 2022-04-12 | 镇江市镇特合金材料有限公司 | High-wear-resistance copper alloy for roller and preparation method thereof |
-
2017
- 2017-11-13 CN CN201711112554.0A patent/CN109777995A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238616A (en) * | 2019-06-24 | 2019-09-17 | 桐庐明晟五金塑料制品厂 | One Albatra metal sliding block and preparation method thereof |
| CN111676388A (en) * | 2020-08-01 | 2020-09-18 | 贵溪骏达特种铜材有限公司 | Method for improving mechanical property of aluminum bronze |
| CN111676388B (en) * | 2020-08-01 | 2021-09-17 | 贵溪骏达特种铜材有限公司 | Method for improving mechanical property of aluminum bronze |
| CN114318052A (en) * | 2021-12-16 | 2022-04-12 | 镇江市镇特合金材料有限公司 | High-wear-resistance copper alloy for roller and preparation method thereof |
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Application publication date: 20190521 |