CN109266898B - Cast tin bronze for friction pair of aviation hydraulic pump and smelting method thereof - Google Patents
Cast tin bronze for friction pair of aviation hydraulic pump and smelting method thereof Download PDFInfo
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Abstract
The invention discloses a cast tin bronze for an aviation hydraulic pump friction pair and a smelting method thereof, wherein the cast tin bronze comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc, 0.08-0.12% of rare earth oxide, 0.01-0.1% of phosphorus and the balance of copper; the raw materials for manufacturing the tin bronze comprise, by weight, 9-11 parts of pure tin, 2-3.3 parts of pure lead, 30-40 parts of copper-nickel intermediate alloy, 0.2-0.5 part of pure zinc, 0.1 part of rare earth oxide, 0.067-0.67 part of phosphorus copper and the balance of pure copper; the copper-nickel intermediate alloy contains 18-20% of nickel, and the balance is copper; the phosphorus-copper alloy contains 13-15% of phosphorus and the balance of copper. The invention has the advantages of better bearing capacity, better wear resistance and smaller expansion coefficient, and can meet the development requirement of a new generation of friction pair of an aviation hydraulic pump.
Description
Technical Field
The invention belongs to the field of materials of parts forming a friction pair on an aviation hydraulic pump, and particularly relates to cast tin bronze for the friction pair of the aviation hydraulic pump and a smelting method thereof.
Background
The aviation hydraulic pump is a complete set of device which takes oil as a working medium and drives an actuating mechanism to complete a specific operation action by oil pressure on an aircraft. The aviation hydraulic pump is a small-sized precise friction system, and the service life of a friction pair in the pump is a key factor for determining the service life and reliability of the pump; at present, for the material pairing between two parts forming the friction pair in the aviation hydraulic pump, the pairing of tin bronze and nitrided steel is commonly adopted, for example, the pairing of ZQSn10-2-3 type tin bronze and 38CrMoAlA type nitrided steel, QSn6.5-0.1 type tin bronze and 38CrMoAlA type nitrided steel, ZQSn10-2-3 type tin bronze and 25Cr3MoA type nitrided steel, QSn6.5-0.1 type tin bronze and 25Cr3MoA type nitrided steel, and the pairing of softer tin bronze and harder nitrided steel has the advantages of easy grinding-in of the friction pair, good thermal conductivity and better anti-adhesion wear capability.
However, with the development of the new generation of aviation hydraulic pump towards high pressure, high rotating speed, long service life and high reliability, the problems of insufficient bearing capacity and easy material abrasion of the aviation hydraulic pump friction pair become prominent, higher requirements are provided for the bearing capacity and the abrasion resistance of tin bronze, the bearing capacity and the abrasion resistance of the existing tin bronze are poor, the development requirement of the new generation of aviation hydraulic pump friction pair cannot be met, the expansion coefficient of the existing tin bronze is large, the deformation of the tin bronze caused by heating is large, and the development requirement of the new generation of aviation hydraulic pump friction pair cannot be met. Therefore, the existing tin bronze has the defects of poor bearing capacity, poor wear resistance and large expansion coefficient, and can not meet the development requirement of a new generation of friction pair of an aviation hydraulic pump.
Disclosure of Invention
The invention aims to provide cast tin bronze for an aviation hydraulic pump friction pair and a smelting method thereof. The invention has the advantages of better bearing capacity, better wear resistance and smaller expansion coefficient, and can meet the development requirement of a new generation of friction pair of an aviation hydraulic pump.
The technical scheme of the invention is as follows: the cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc, 0.08-0.12% of rare earth oxide, 0.01-0.1% of phosphorus and the balance copper.
The cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc, 0.1% of rare earth oxide, 0.01-0.1% of phosphorus and the balance copper.
The raw materials for manufacturing the tin bronze in the cast tin bronze for the friction pair of the aviation hydraulic pump comprise, by weight, 9-11 parts of pure tin, 2-3.3 parts of pure lead, 30-40 parts of copper-nickel intermediate alloy, 0.2-0.5 part of pure zinc, 0.1 part of rare earth oxide, 0.067-0.67 part of phosphor-copper and the balance of pure copper; the copper-nickel intermediate alloy contains 18-20% of nickel, and the balance is copper; the phosphorus-copper alloy contains 13-15% of phosphorus and the balance of copper.
The smelting method of the cast tin bronze for the friction pair of the aviation hydraulic pump comprises the following steps,
a. preheating a graphite crucible to 700-800 ℃,
b. sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating to 1120-1160 ℃ to melt the copper-nickel intermediate alloy and the pure copper to obtain a product B,
c. adding two thirds of phosphor copper into the product B to obtain a product C,
d. adding pure tin, pure lead, pure zinc and the rest of phosphor copper into the product C in sequence, keeping the temperature of the product C at 1120-1160 ℃ to obtain a product D,
e. pouring the product D into a water-cooling copper mold, cooling the product D to obtain a product E,
f. and annealing the product E to obtain a finished product.
In the smelting method of the cast tin bronze for the friction pair of the aviation hydraulic pump, in the step B, the copper-nickel intermediate alloy and the pure copper are heated to 1120-1160 ℃ by adopting a medium-frequency induction furnace, so that the copper-nickel intermediate alloy and the pure copper are melted to obtain a product B.
In the smelting method for casting the tin bronze for the friction pair of the aviation hydraulic pump, in the step E, corresponding sand sleeve risers and rain blocks are manufactured according to the structure of a water-cooled copper mold for casting the tin bronze, then the sand sleeve risers and the rain blocks are assembled into the water-cooled copper mold, then a product D is poured into the water-cooled copper mold, and the product D is cooled to obtain a product E.
In the smelting method of the cast tin bronze for the friction pair of the aviation hydraulic pump, in the step f, homogenizing annealing is carried out on the product E at 650-750 ℃ for (4-6) h to obtain a finished product.
In the smelting method of the cast tin bronze for the friction pair of the aviation hydraulic pump, in the step f, homogenizing annealing is carried out on the E product at 700 ℃ for (4-6) h to obtain a finished product.
In the smelting method of the cast tin bronze for the friction pair of the aviation hydraulic pump, the sand sleeve riser and the deluge block are both made of quartz sand mixed with 5-8% of rapeseed oil and are obtained by heat preservation for 1.5-2.5 hours at 200-400 ℃, and the granularity of the quartz sand is 50/100.
In the smelting method for casting the tin bronze for the friction pair of the aviation hydraulic pump, in the step E, corresponding sand sleeve risers and rain blocks are manufactured according to the structure of a water-cooled copper mold for casting the tin bronze, then the sand sleeve risers and the rain blocks are assembled in the water-cooled copper mold, then the D product is stirred, scum on the D product is removed, the D product is poured into a pouring ladle, dried straw ash is covered on the liquid level of the pouring ladle, then the D product in the pouring ladle is poured into the water-cooled copper mold, the D product is kept not to be cut off when pouring, and the D product is cooled in the water-cooled copper mold to obtain the E product.
Compared with the prior art, the high-temperature-resistant tin bronze disclosed by the invention has the advantages that the high-temperature-resistant strength and the melting point of the tin bronze are improved by increasing the content of nickel, the wear resistance of the tin bronze is improved, the distribution of lead particles in the tin bronze is improved, the expansion coefficient of the tin bronze is reduced, and the deformation of the tin bronze caused by heating is smaller; by adding 0.2-0.5% of zinc, the crystallization temperature range of tin bronze is reduced, the casting quality of tin bronze is improved, and the bearing capacity of tin bronze is improved; by adding rare earth elements, tin segregation is reduced, crystal grains are refined, and the bearing capacity of tin bronze is further improved. Therefore, the friction pair has the advantages of good bearing capacity, good wear resistance and small expansion coefficient, and can meet the development requirements of new generation of friction pairs of aviation hydraulic pumps.
Drawings
FIG. 1 is a 500-fold enlarged structural view of a tin bronze according to the present invention.
FIG. 2 is a 500-fold enlarged structural view of a ZQSn10-2-3 type tin bronze.
FIG. 3 is a 500-fold enlarged structural view of a tin bronze of QSn6.5-0.1 type.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1. The cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc and 0.1% of rare earth oxide CeO20.01 to 0.1 percent of phosphorus, and the balance of copper.
A smelting method of cast tin bronze for an aviation hydraulic pump friction pair comprises the steps of preparing raw materials for manufacturing tin bronze, wherein the raw materials comprise 6Kg of pure tin, 1.5Kg of pure lead, 24.77Kg of copper-nickel medium alloy (containing 4.8Kg of nickel and the balance of copper), 0.3Kg of pure zinc, 0.06Kg of rare earth oxide, 0.4Kg of phosphorus-copper (containing 0.06Kg of phosphorus and the balance of copper), 26.97Kg of pure copper, and the total amount of the raw materials is 60 Kg. Then, quartz sand with the particle size of 50/100 and mixed with 5-8% rapeseed oil is used for manufacturing a sand sleeve riser and a deluge block, the sand sleeve riser and the deluge block are heated to 200-400 ℃, and heat preservation is carried out for 1.5-2.5 hours; then cleaning a sand sleeve riser and a deluge block, trimming a small head of the deluge hole to phi 6-phi 8, and ensuring the vent hole to be smooth. Polishing the inner cavity and the surface of the water-cooled copper mold by using abrasive cloth, turning over the water-cooled copper mold immediately, and burning cotton yarns dipped with anhydrous kerosene in a cavity of the water-cooled copper mold to generate smoke as a coating and uniformly distribute the coating in the cavity.
Preheating a graphite crucible to 700-800 ℃,
sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating the copper-nickel intermediate alloy and the pure copper to 1120-1160 ℃ by adopting a medium-frequency induction furnace, melting the copper-nickel intermediate alloy and the pure copper to obtain a product B,
then adding two thirds of phosphorus copper (about 0.267kg of phosphorus copper) into the product B to obtain a product C, covering the liquid surface of the product C with dry charcoal,
after melting the phosphor copper in the product C, adding pure tin, pure lead, pure zinc, rare earth oxide and the rest phosphor copper into the product C in sequence, keeping the temperature of the product C at 1120-1160 ℃ to obtain a product D,
cleaning prepared sand sleeve risers and deluge blocks by using compressed air before discharging D products out of the furnace, assembling the sand sleeve risers and the deluge blocks on a water-cooled copper mold, checking whether vent holes are unblocked, controlling the temperature of the D products before discharging at 1120-1160 ℃, fully stirring, and removing scum; and then pouring the product D into a casting ladle, covering a layer of dry straw ash on the liquid surface of the casting ladle, then pouring the product D in the casting ladle into a water-cooled copper mold, keeping the product D in a continuous flow during pouring until a cavity of the water-cooled copper mold is filled with the product D, and cooling the product D in the water-cooled copper mold to obtain a product E.
And taking out the E product from the water-cooled copper mold, and removing the excess riser material above the deluge block.
And (4) carrying out homogenization annealing on the product E at 700 ℃ for (4-6) h, and carrying out furnace cooling to obtain a finished product.
Example 2. The cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc and 0.1% of rare earth oxide CeO20.01 to 0.1 percent of phosphorus, and the balance of copper.
A smelting method of cast tin bronze for an aviation hydraulic pump friction pair comprises the steps of preparing raw materials for manufacturing the tin bronze, wherein the raw materials comprise 5.4Kg of pure tin, 1.5Kg of pure lead, 22.12Kg of copper-nickel medium alloy (4.2 Kg of nickel and the balance of copper), 0.3Kg of pure zinc, 0.06Kg of rare earth oxide, 0.4Kg of phosphorus-copper (containing 0.06Kg of phosphorus and the balance of copper), 30.22Kg of pure copper and 60Kg of raw materials in total. Then, quartz sand with the particle size of 50/100 and mixed with 5-8% rapeseed oil is used for manufacturing a sand sleeve riser and a deluge block, the sand sleeve riser and the deluge block are heated to 200-400 ℃, and heat preservation is carried out for 1.5-2.5 hours; then cleaning a sand sleeve riser and a deluge block, trimming a small head of the deluge hole to phi 6-phi 8, and ensuring the vent hole to be smooth. Polishing the inner cavity and the surface of the water-cooled copper mold by using abrasive cloth, turning over the water-cooled copper mold immediately, and burning cotton yarns dipped with anhydrous kerosene in a cavity of the water-cooled copper mold to generate smoke as a coating and uniformly distribute the coating in the cavity.
Preheating a graphite crucible to 700-800 ℃,
sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating the copper-nickel intermediate alloy and the pure copper to 1120-1160 ℃ by adopting a medium-frequency induction furnace, melting the copper-nickel intermediate alloy and the pure copper to obtain a product B,
then adding two thirds of phosphorus copper (about 0.267kg of phosphorus copper) into the product B to obtain a product C, covering the liquid surface of the product C with dry charcoal,
after melting the phosphor copper in the product C, adding pure tin, pure lead, pure zinc, rare earth oxide and the rest phosphor copper into the product C in sequence, keeping the temperature of the product C at 1120-1160 ℃ to obtain a product D,
cleaning prepared sand sleeve risers and deluge blocks by using compressed air before discharging D products out of the furnace, assembling the sand sleeve risers and the deluge blocks on a water-cooled copper mold, checking whether vent holes are unblocked, controlling the temperature of the D products before discharging at 1120-1160 ℃, fully stirring, and removing scum; and then pouring the product D into a casting ladle, covering a layer of dry straw ash on the liquid surface of the casting ladle, then pouring the product D in the casting ladle into a water-cooled copper mold, keeping the product D in a continuous flow during pouring until a cavity of the water-cooled copper mold is filled with the product D, and cooling the product D in the water-cooled copper mold to obtain a product E.
And taking out the E product from the water-cooled copper mold, and removing the excess riser material above the deluge block.
And (4) carrying out homogenization annealing on the product E at 700 ℃ for (4-6) h, and carrying out furnace cooling to obtain a finished product.
Example 3. The cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc and 0.1% of rare earth oxide CeO20.01 to 0.1 percent of phosphorus, and the balance of copper.
A smelting method of cast tin bronze for an aviation hydraulic pump friction pair comprises the steps of preparing raw materials for manufacturing the tin bronze, wherein the raw materials comprise 5.6Kg of pure tin, 1.35Kg of pure lead, 19.89Kg of copper-nickel medium alloy (3.78 Kg of nickel and the balance of copper), 0.3Kg of pure zinc, 0.06Kg of rare earth oxide, 0.4Kg of phosphorus-copper (containing 0.06Kg of phosphorus and the balance of copper), 32.4Kg of pure copper and 60Kg of raw materials in total. Then, quartz sand with the particle size of 50/100 and mixed with 5-8% rapeseed oil is used for manufacturing a sand sleeve riser and a deluge block, the sand sleeve riser and the deluge block are heated to 200-400 ℃, and heat preservation is carried out for 1.5-2.5 hours; then cleaning a sand sleeve riser and a deluge block, trimming a small head of the deluge hole to phi 6-phi 8, and ensuring the vent hole to be smooth. Polishing the inner cavity and the surface of the water-cooled copper mold by using abrasive cloth, turning over the water-cooled copper mold immediately, and burning cotton yarns dipped with anhydrous kerosene in a cavity of the water-cooled copper mold to generate smoke as a coating and uniformly distribute the coating in the cavity.
Preheating a graphite crucible to 700-800 ℃,
sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating the copper-nickel intermediate alloy and the pure copper to 1120-1160 ℃ by adopting a medium-frequency induction furnace, melting the copper-nickel intermediate alloy and the pure copper to obtain a product B,
then adding two thirds of phosphorus copper (about 0.267kg of phosphorus copper) into the product B to obtain a product C, covering the liquid surface of the product C with dry charcoal,
after melting the phosphor copper in the product C, adding pure tin, pure lead, pure zinc, rare earth oxide and the rest phosphor copper into the product C in sequence, keeping the temperature of the product C at 1120-1160 ℃ to obtain a product D,
cleaning prepared sand sleeve risers and deluge blocks by using compressed air before discharging D products out of the furnace, assembling the sand sleeve risers and the deluge blocks on a water-cooled copper mold, checking whether vent holes are unblocked, controlling the temperature of the D products before discharging at 1120-1160 ℃, fully stirring, and removing scum; and then pouring the product D into a casting ladle, covering a layer of dry straw ash on the liquid surface of the casting ladle, then pouring the product D in the casting ladle into a water-cooled copper mold, keeping the product D in a continuous flow during pouring until a cavity of the water-cooled copper mold is filled with the product D, and cooling the product D in the water-cooled copper mold to obtain a product E.
And taking out the E product from the water-cooled copper mold, and removing the excess riser material above the deluge block.
And (4) carrying out homogenization annealing on the product E at 700 ℃ for (4-6) h, and carrying out furnace cooling to obtain a finished product.
Example 4. The cast tin bronze for the friction pair of the aviation hydraulic pump comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc and 0.1% of rare earth oxide CeO20.01 to 0.1 percent of phosphorus, and the balance of copper.
A smelting method of cast tin bronze for an aviation hydraulic pump friction pair comprises the steps of preparing raw materials for manufacturing tin bronze, wherein the raw materials comprise 7.8Kg of pure tin, 2Kg of pure lead, 26.84Kg of copper-nickel medium alloy (5.1 Kg of nickel and the balance of copper), 0.3Kg of pure zinc, 0.06Kg of rare earth oxide, 0.4Kg of phosphorus-copper (containing 0.06Kg of phosphorus and the balance of copper), 22.6Kg of pure copper, and the total amount of the raw materials is 60 Kg. Then, quartz sand with the particle size of 50/100 and mixed with 5-8% rapeseed oil is used for manufacturing a sand sleeve riser and a deluge block, the sand sleeve riser and the deluge block are heated to 200-400 ℃, and heat preservation is carried out for 1.5-2.5 hours; then cleaning a sand sleeve riser and a deluge block, trimming a small head of the deluge hole to phi 6-phi 8, and ensuring the vent hole to be smooth. Polishing the inner cavity and the surface of the water-cooled copper mold by using abrasive cloth, turning over the water-cooled copper mold immediately, and burning cotton yarns dipped with anhydrous kerosene in a cavity of the water-cooled copper mold to generate smoke as a coating and uniformly distribute the coating in the cavity.
The graphite crucible is preheated to 750 ℃,
sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating the copper-nickel intermediate alloy and the pure copper to 1140 ℃ by adopting a medium-frequency induction furnace, melting the copper-nickel intermediate alloy and the pure copper to obtain a product B,
then adding two thirds of phosphorus copper (about 0.267kg of phosphorus copper) into the product B to obtain a product C, covering the liquid surface of the product C with dry charcoal,
after the phosphorus and copper in the product C are melted, adding pure tin, pure lead, pure zinc, rare earth oxide and the rest phosphorus and copper into the product C in sequence, keeping the temperature of the product C at 1140 ℃ to obtain a product D,
cleaning prepared sand sleeve risers and deluge blocks by using compressed air before D products are taken out of the furnace, assembling the sand sleeve risers and the deluge blocks on a water-cooled copper mold, checking whether vent holes are unblocked, controlling the temperature of the D products at 1140 ℃ before the D products are taken out of the furnace, fully stirring, and removing scum; and then pouring the product D into a casting ladle, covering a layer of dry straw ash on the liquid surface of the casting ladle, then pouring the product D in the casting ladle into a water-cooled copper mold, keeping the product D in a continuous flow during pouring until a cavity of the water-cooled copper mold is filled with the product D, and cooling the product D in the water-cooled copper mold to obtain a product E.
And taking out the E product from the water-cooled copper mold, and removing the excess riser material above the deluge block.
And (4) carrying out homogenization annealing on the product E at 700 ℃ for 5h, and cooling in a furnace to obtain a finished product.
The tin bronze, the ZQSn10-2-3 type tin bronze and the QSn6.5-0.1 tin bronze are observed by a microscope, and the combination of the figure 1, the figure 2 and the figure 3 shows that compared with the ZQSn10-2-3 type tin bronze, the tin bronze has obviously lower tin-rich phase segregation degree, namely the tin bronze has better performance stability and hot brittleness; compared with QSn6.5-0.1 type tin bronze, the structure of the tin bronze has the characteristic of a typical matrix + dispersed second phase wear-resistant structure, namely the tin bronze has higher wear resistance and fatigue resistance.
The tin bronzes of the present invention were compared with the ZQSn10-2-3 type tin bronzes and qsn6.5-0.1 type tin bronzes to obtain the parameters in the following table:
as can be seen from the table, the tensile strength and hardness of the tin bronze are higher than those of the ZQSn10-2-3 type tin bronze and QSn6.5-0.1 type tin bronze, namely the tin bronze has better strength and higher bearing capacity, and the friction coefficient between the tin bronze and two types of nitrided steel is smaller and the wear resistance is better. Therefore, the friction pair has the advantages of good bearing capacity, good wear resistance and small expansion coefficient, and can meet the development requirements of new generation of friction pairs of aviation hydraulic pumps.
Claims (7)
1. The utility model provides a vice casting tin bronze that uses of aviation hydraulic pump friction which characterized in that: the alloy comprises, by weight, 9-11% of tin, 6-8% of nickel, 2-3.3% of lead, 0.2-0.5% of zinc, 0.1% of rare earth oxide, 0.01-0.1% of phosphorus and the balance of copper; the rare earth oxide is CeO2；
The raw materials for manufacturing the tin bronze comprise, by weight, 9-11 parts of pure tin, 2-3.3 parts of pure lead, 30-40 parts of copper-nickel intermediate alloy, 0.2-0.5 part of pure zinc, 0.1 part of rare earth oxide, 0.067-0.67 part of phosphorus copper and the balance of pure copper; the copper-nickel intermediate alloy contains 18-20% of nickel, and the balance is copper; the phosphorus-copper alloy contains 13-15% of phosphorus and the balance of copper;
the smelting method of the tin bronze comprises the following steps,
a. preheating a graphite crucible to 700-800 ℃,
b. sequentially adding copper-nickel intermediate alloy and pure copper into a graphite crucible, heating to 1120-1160 ℃ to melt the copper-nickel intermediate alloy and the pure copper to obtain a product B,
c. adding two thirds of phosphor copper into the product B to obtain a product C,
d. adding pure tin, pure lead, pure zinc and the rest of phosphor copper into the product C in sequence, keeping the temperature of the product C at 1120-1160 ℃ to obtain a product D,
e. pouring the product D into a water-cooling copper mold, cooling the product D to obtain a product E,
f. and annealing the product E to obtain a finished product.
2. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 1, wherein: and B, heating the copper-nickel intermediate alloy and the pure copper to 1120-1160 ℃ by adopting a medium-frequency induction furnace to melt the copper-nickel intermediate alloy and the pure copper to obtain a product B.
3. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 1, wherein: and E, manufacturing corresponding sand sleeve risers and rain blocks according to the structure of the water-cooled copper mold for casting the tin bronze, assembling the sand sleeve risers and the rain blocks into the water-cooled copper mold, pouring the product D into the water-cooled copper mold, and cooling the product D to obtain the product E.
4. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 1, wherein: and f, carrying out homogenization annealing on the product E at 650-750 ℃ for (4-6) h to obtain a finished product.
5. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 4, wherein: and f, carrying out homogenization annealing on the product E at 700 ℃ for (4-6) h to obtain a finished product.
6. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 3, wherein: the sand sleeve riser and the deluge block are both made of quartz sand mixed with 5-8% of rapeseed oil and are obtained by heat preservation for 1.5-2.5 hours at 200-400 ℃, and the granularity of the quartz sand is 50/100.
7. The cast tin bronze for the friction pair of the aviation hydraulic pump as claimed in claim 3, wherein: and E, manufacturing corresponding sand sleeve risers and rain blocks according to the structure of the water-cooled copper mold for casting the tin bronze, assembling the sand sleeve risers and the rain blocks into the water-cooled copper mold, stirring the D product, removing floating slag on the D product, pouring the D product into a pouring ladle, covering dry straw ash on the liquid surface of the pouring ladle, pouring the D product in the pouring ladle into the water-cooled copper mold, keeping the D product from flowing out when pouring, and cooling the D product in the water-cooled copper mold to obtain the E product.
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| JPH02170936A (en) * | 1988-12-24 | 1990-07-02 | Nippon Mining Co Ltd | Copper alloy having superior direct bonding property |
| CN101665884A (en) * | 2008-09-01 | 2010-03-10 | 中国核动力研究设计院 | Tin bronze for manufacturing pepeline fittings and production process of pepeline fittings thereof |
| AT509867B1 (en) * | 2010-04-15 | 2011-12-15 | Miba Gleitlager Gmbh | MULTILAYER BEARING BEARING WITH AN ANTIFRETTING LAYER |
| CN102304642B (en) * | 2011-08-26 | 2012-10-24 | 河南科技大学 | Cast wear-resistant tin bronze alloy and preparation method thereof |
| CN103710571B (en) * | 2013-12-02 | 2016-09-14 | 中航力源液压股份有限公司 | A kind of Friction pair bronze alloy material and production technology thereof |
| CN107604202B (en) * | 2017-09-18 | 2020-01-21 | 宁波兴业盛泰集团有限公司 | High-performance phosphor bronze strip and preparation method thereof |
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2018
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