CN111390184A - Preparation method of high-strength engine connecting rod - Google Patents
Preparation method of high-strength engine connecting rod Download PDFInfo
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- CN111390184A CN111390184A CN202010336325.2A CN202010336325A CN111390184A CN 111390184 A CN111390184 A CN 111390184A CN 202010336325 A CN202010336325 A CN 202010336325A CN 111390184 A CN111390184 A CN 111390184A
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- engine connecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
Abstract
The invention discloses a preparation method of a high-strength engine connecting rod, which comprises the following raw materials: nickel powder, molybdenum powder, manganese powder, copper powder, chromium powder, silicon powder, phosphorus powder, carbon powder, iron powder, sulfur powder, alumina powder, silicon carbide powder, a binder, a lubricant and an aluminum solution; the preparation method of the high-strength engine connecting rod comprises the following steps: the method comprises the following steps: mixing metal powder to obtain pre-alloyed powder; step two: pressing and molding the pre-alloyed powder to obtain a pre-molded blank; step three: putting the preformed blank into a pressed film, pouring an aluminum solution, and immediately pressurizing; step four: sintering and forging the pre-formed blank to obtain a connecting rod blank; step five: carrying out heat treatment on the connecting rod blank; step six: putting the connecting rod blank into a shot blasting machine for strengthening; step seven: and (5) manufacturing a finished product by dividing the connecting rod body and the cover. The engine connecting rod manufactured by the method has the functions of light weight, high strength and small expansion coefficient, and is very beneficial to improving the efficiency of the engine and the fuel economy.
Description
Technical Field
The invention relates to the technical field of manufacturing of engine connecting rods, in particular to a preparation method of a high-strength engine connecting rod.
Background
The piston and the crankshaft are connected, acting force borne by the piston is transmitted to the crankshaft, and reciprocating motion of the piston is converted into rotating motion of the crankshaft. The connecting rod group comprises a connecting rod body, a connecting rod big end cover, a connecting rod small end bushing, a connecting rod big end bearing bush, a connecting rod bolt (or screw) and the like. The connecting rod group bears the action of gas force transmitted by the piston pin, the action of self swinging and reciprocating inertia force of the piston group, and the magnitude and the direction of the force are periodically changed. The connecting rod is subjected to alternating loads such as compression, tension and the like.
The strength of the engine connecting rod manufactured in the prior art is insufficient, the connecting rod body or the connecting rod bolt is often broken, and then a serious accident that the whole machine is damaged is caused, and the bending deformation of the rod body and the out-of-round deformation of the big end of the connecting rod are caused, so that eccentric wear of a piston, a cylinder, a bearing, a crank pin and the like is caused.
Disclosure of Invention
The invention aims to provide a preparation method of a high-strength engine connecting rod, which aims to solve the technical defects and technical requirements which cannot be met in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a high-strength engine connecting rod comprises the following raw materials: nickel powder, molybdenum powder, manganese powder, copper powder, chromium powder, silicon powder, phosphorus powder, carbon powder, iron powder, sulfur powder, alumina powder, silicon carbide powder, a binder, a lubricant and an aluminum solution; the preparation process of the high-strength engine connecting rod comprises the following steps: the method comprises the following steps: mixing metal powder to obtain pre-alloyed powder; step two: pressing and molding the pre-alloyed powder to obtain a pre-molded blank; step three: putting the preformed blank into a pressed film, pouring an aluminum solution, and immediately pressurizing; step four: sintering and forging the pre-formed blank to obtain a connecting rod blank; step five: carrying out heat treatment on the connecting rod blank; step six: putting the connecting rod blank into a shot blasting machine for strengthening; step seven: and (5) manufacturing a finished product by dividing the connecting rod body and the cover.
Preferably, the raw material ratio for preparing the high-strength engine connecting rod material is as follows: the proportion of the nickel powder is 10-15%; the proportion of the molybdenum powder is 8% -12%; the proportion of the manganese powder is 6-10%; the proportion of the copper powder is 7% -11%; the proportion of the chromium powder is 9-13%; the proportion of the silicon powder is 1-5%; the proportion of the phosphorus powder is 3-7%; the proportion of the carbon powder is 1-5%; the proportion of the iron powder is 8% -12%; the proportion of the sulfur powder is 6-10%; the proportion of the alumina powder is 8-12%; the proportion of the silicon carbide powder is 6-10%; the proportion of the binder is 1% -5%, and the proportion of the binder is 1% -5%.
Preferably, the first step is to mix the metal powder to obtain pre-alloyed powder, wherein the pre-alloyed powder specifically comprises mixing 12% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 11% of chromium powder, 3% of silicon powder, 5% of phosphorus powder, 3% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 3% of lubricant, then pouring 3% of binder into the mixed material, and finally pouring 8% of silicon carbide powder into the mixed material.
Preferably, the pressing and molding to obtain the preform in the second step specifically includes pouring the pre-alloyed powder into a set mold, heating the pre-alloyed powder to 172.5-321.5 ℃, and pressing and molding under 620-950MPaA, wherein the heating time is not less than 5 min.
Preferably, the mass ratio of the aluminum solution poured into the third step to the engine connecting rod preformed blank is 1:30-50ml, and the temperature of the aluminum solution poured into the engine connecting rod preformed blank is 260.5-380.9 ℃.
Preferably, the step four of sintering and forging the preformed blank to obtain the connecting rod blank further comprises a step of removing the lubricant before sintering and forging.
Preferably, the heat treatment process involved in the method for manufacturing the high-strength engine connecting rod is performed in an anti-oxidation protective atmosphere.
Preferably, the step six of putting the connecting rod blank into the shot blasting machine for strengthening comprises controlling the surface roughness of the connecting rod blank to be between Ra2 μm and Ra5 μm.
Compared with the prior art, the invention has the following beneficial effects:
according to the preparation method of the high-strength engine connecting rod, the silicon carbide powder fiber material is added in the raw material proportion selection, the silicon carbide powder fiber material and the prealloy powder are mixed by using the binder and the lubricant, the preformed blank is processed and manufactured, then the aluminum solution is poured into the die cavity filled with the preformed blank, and the aluminum solution is made to permeate into the surface gap of the preformed blank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a preparation method of a high-strength engine connecting rod comprises the following raw materials: nickel powder, molybdenum powder, manganese powder, copper powder, chromium powder, silicon powder, phosphorus powder, carbon powder, iron powder, sulfur powder, alumina powder, silicon carbide powder, a binder, a lubricant and an aluminum solution; the preparation process of the high-strength engine connecting rod comprises the following steps: the method comprises the following steps: mixing metal powder to obtain pre-alloyed powder; step two: pressing and molding the pre-alloyed powder to obtain a pre-molded blank; step three: putting the preformed blank into a pressed film, pouring an aluminum solution, and immediately pressurizing; step four: sintering and forging the pre-formed blank to obtain a connecting rod blank; step five: carrying out heat treatment on the connecting rod blank; step six: putting the connecting rod blank into a shot blasting machine for strengthening; step seven: and (5) manufacturing a finished product by dividing the connecting rod body and the cover.
Preferably, the raw material ratio for preparing the high-strength engine connecting rod material is as follows: the proportion of the nickel powder is 8-12%; the proportion of the molybdenum powder is 8% -12%; the proportion of the manganese powder is 6-10%; the proportion of the copper powder is 7% -11%; the proportion of the chromium powder is 9-13%; the proportion of the silicon powder is 1-5%; the proportion of the phosphorus powder is 3-7%; the proportion of the carbon powder is 1-5%; the proportion of the iron powder is 8% -12%; the proportion of the sulfur powder is 6-10%; the proportion of the alumina powder is 8-12%; the proportion of the silicon carbide powder is 6-10%; the proportion of the binder is 1% -5%, and the proportion of the binder is 1% -5%.
Firstly, mixing metal powder to obtain prealloying powder, wherein the prealloying powder specifically comprises the steps of mixing 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 3% of silicon powder, 5% of phosphorus powder, 3% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 3% of lubricant, then pouring 3% of binder into the mixture, and finally pouring 8% of silicon carbide powder into the mixture.
And step two, pressing and molding to obtain a pre-molded blank specifically comprises pouring pre-alloyed powder into a set mold, heating the pre-alloyed powder to 172.5-321.5 ℃, and pressing and molding under 620-950MPaA, wherein the heating time is not less than 5 min.
In the third step, the mass ratio of the aluminum solution poured into the engine connecting rod preformed blank is 1:30-50ml, and the temperature of the aluminum solution poured into the engine connecting rod preformed blank is 260.5-380.9 ℃.
And step four, sintering and forging the preformed blank to obtain the connecting rod blank, and adding a lubricant removing procedure before sintering and forging.
And sixthly, putting the connecting rod blank into a shot blasting machine for strengthening, wherein the surface roughness of the connecting rod blank is controlled to be Ra 2-Ra 5 μm.
The heat treatment process involved in the preparation method of the high-strength engine connecting rod is carried out in the anti-oxidation protective atmosphere.
Example 1
The invention relates to a preparation method of a high-strength engine connecting rod, which comprises the following raw materials in parts by weight: 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 3% of silicon powder, 5% of phosphorus powder, 3% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder, 3% of lubricant, 3% of binder and 8% of silicon carbide powder.
The preparation process comprises the following steps:
s1: mixing 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 3% of silicon powder, 5% of phosphorus powder, 3% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 3% of lubricant;
s2: 3% of binder is poured into the mixed material;
s3: 8% of silicon carbide powder is poured into the mixed material to obtain pre-alloyed powder;
s4: heating the prealloyed powder to 301.5 ℃ for 10min, and pressing and forming under 780 MPaA;
s5: pouring 30ml of aluminum solution at the temperature of 280.5 ℃ into a mold filled with the preformed blank to ensure that the aluminum solution permeates into the surface gap of the preformed blank;
s6: removing the lubricant;
s7: sintering and forging the pre-formed blank to obtain a connecting rod blank;
s8: carrying out heat treatment on the connecting rod blank;
s9: putting the connecting rod blank into a shot blasting machine for strengthening, and controlling the surface roughness of the connecting rod blank to be between Ra2 and Ra5 microns;
s10: manufacturing a finished product by dividing the connecting rod body and the cover;
example 2
The invention relates to a preparation method of a high-strength engine connecting rod, which comprises the following raw materials in parts by weight: 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 8% of silicon powder, 5% of phosphorus powder, 8% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 4% of lubricant.
The preparation process comprises the following steps:
s1: 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 8% of silicon powder, 5% of phosphorus powder, 8% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 4% of lubricant;
s2: heating the prealloyed powder to 660.4-720.9 ℃, keeping for 5min, and pressing and molding under 780 MPaA;
s3: removing the lubricant;
s4: sintering and forging the pre-formed blank to obtain a connecting rod blank;
s5: carrying out heat treatment on the connecting rod blank;
s6: putting the connecting rod blank into a shot blasting machine for strengthening, and controlling the surface roughness of the connecting rod blank to be between Ra2 and Ra5 microns;
s7: manufacturing a finished product by dividing the connecting rod body and the cover;
by comparing the methods of example 1 and example 2, the method of example 1 was used to add a silicon carbide powder-based fiber material to the mix of raw materials, mix it with prealloyed powder using a binder and a lubricant, and cast an aluminum solution into the cavity of the mold containing the preform after the preform was processed to make the aluminum solution penetrate into the surface gaps of the preform.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A preparation method of a high-strength engine connecting rod is characterized by comprising the following steps: the raw materials for preparing the high-strength engine connecting rod material are as follows: nickel powder, molybdenum powder, manganese powder, copper powder, chromium powder, silicon powder, phosphorus powder, carbon powder, iron powder, sulfur powder, alumina powder, silicon carbide powder, a binder, a lubricant and an aluminum solution; the preparation process of the high-strength engine connecting rod comprises the following steps: the method comprises the following steps: mixing metal powder to obtain pre-alloyed powder; step two: pressing and molding the pre-alloyed powder to obtain a pre-molded blank; step three: putting the preformed blank into a pressed film, pouring an aluminum solution, and immediately pressurizing; step four: sintering and forging the pre-formed blank to obtain a connecting rod blank; step five: carrying out heat treatment on the connecting rod blank; step six: putting the connecting rod blank into a shot blasting machine for strengthening; step seven: and (5) manufacturing a finished product by dividing the connecting rod body and the cover.
2. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: the raw material ratio for preparing the high-strength engine connecting rod material is as follows: the proportion of the nickel powder is 8-12%; the proportion of the molybdenum powder is 8% -12%; the proportion of the manganese powder is 6-10%; the proportion of the copper powder is 7% -11%; the proportion of the chromium powder is 9-13%; the proportion of the silicon powder is 1-5%; the proportion of the phosphorus powder is 3-7%; the proportion of the carbon powder is 1-5%; the proportion of the iron powder is 8% -12%; the proportion of the sulfur powder is 6-10%; the proportion of the alumina powder is 8-12%; the proportion of the silicon carbide powder is 6-10%; the proportion of the binder is 1% -5%, and the proportion of the binder is 1% -5%.
3. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: firstly, mixing metal powder to obtain prealloyed powder, wherein the prealloyed powder specifically comprises the steps of mixing 10% of nickel powder, 10% of molybdenum powder, 8% of manganese powder, 9% of copper powder, 10% of chromium powder, 3% of silicon powder, 5% of phosphorus powder, 3% of carbon powder, 10% of iron powder, 8% of sulfur powder, 10% of alumina powder and 3% of lubricant, then pouring 3% of binder into the mixture, and finally pouring 8% of silicon carbide powder into the mixture.
4. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: and step two, pressing and molding to obtain the pre-molded blank specifically comprises pouring pre-alloyed powder into a set mold, heating the pre-alloyed powder to 172.5-321.5 ℃, and pressing and molding under 620-950MPaA, wherein the heating time is not less than 5 min.
5. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: the mass ratio of the aluminum solution poured into the engine connecting rod preformed blank in the third step is 1:30-50ml, and the temperature of the aluminum solution poured into the engine connecting rod preformed blank is 260.5-380.9 ℃.
6. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: and in the fourth step, the step of sintering and forging the preformed blank to obtain the connecting rod blank also comprises a step of removing the lubricant before sintering and forging.
7. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: the heat treatment process involved in the preparation method of the high-strength engine connecting rod is carried out in the anti-oxidation protective atmosphere.
8. The method of manufacturing a high strength engine connecting rod according to claim 1, wherein: and sixthly, putting the connecting rod blank into a shot blasting machine for strengthening, wherein the surface roughness of the connecting rod blank is controlled to be Ra 2-Ra 5 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010336325.2A CN111390184A (en) | 2020-04-26 | 2020-04-26 | Preparation method of high-strength engine connecting rod |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010336325.2A CN111390184A (en) | 2020-04-26 | 2020-04-26 | Preparation method of high-strength engine connecting rod |
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Citations (8)
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| CN1144728A (en) * | 1995-03-17 | 1997-03-12 | 丰田自动车株式会社 | Metal sintered body composite material and method for producing the same |
| US5775403A (en) * | 1991-04-08 | 1998-07-07 | Aluminum Company Of America | Incorporating partially sintered preforms in metal matrix composites |
| CA2317149A1 (en) * | 1999-09-03 | 2001-03-03 | Her Majesty The Queen In Right Of Canada, As Represented By The Minist Of Natural Resources Canada | Low volume fraction metal matrix preforms |
| CN101489955A (en) * | 2006-07-14 | 2009-07-22 | 陶氏环球技术公司 | Improved composite material and method of making the composite material |
| CN106424707A (en) * | 2016-10-19 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High-strength powder metallurgy material of axle parts of automobile |
| CN106670375A (en) * | 2016-11-28 | 2017-05-17 | 重庆万斯金属特种成形有限公司 | Forging method for gasoline engine connecting rod |
| CN109692943A (en) * | 2019-01-14 | 2019-04-30 | 东莞理工学院 | A kind of vacuum pressure infiltration positive pressure method preparation SiC3DThe method of/Al composite material |
| CN110272281A (en) * | 2019-01-21 | 2019-09-24 | 西安明科微电子材料有限公司 | A kind of two-phase composite material and preparation method thereof |
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2020
- 2020-04-26 CN CN202010336325.2A patent/CN111390184A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5775403A (en) * | 1991-04-08 | 1998-07-07 | Aluminum Company Of America | Incorporating partially sintered preforms in metal matrix composites |
| CN1144728A (en) * | 1995-03-17 | 1997-03-12 | 丰田自动车株式会社 | Metal sintered body composite material and method for producing the same |
| CA2317149A1 (en) * | 1999-09-03 | 2001-03-03 | Her Majesty The Queen In Right Of Canada, As Represented By The Minist Of Natural Resources Canada | Low volume fraction metal matrix preforms |
| CN101489955A (en) * | 2006-07-14 | 2009-07-22 | 陶氏环球技术公司 | Improved composite material and method of making the composite material |
| CN106424707A (en) * | 2016-10-19 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High-strength powder metallurgy material of axle parts of automobile |
| CN106670375A (en) * | 2016-11-28 | 2017-05-17 | 重庆万斯金属特种成形有限公司 | Forging method for gasoline engine connecting rod |
| CN109692943A (en) * | 2019-01-14 | 2019-04-30 | 东莞理工学院 | A kind of vacuum pressure infiltration positive pressure method preparation SiC3DThe method of/Al composite material |
| CN110272281A (en) * | 2019-01-21 | 2019-09-24 | 西安明科微电子材料有限公司 | A kind of two-phase composite material and preparation method thereof |
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