CN110819858A - Lightweight engine shell and manufacturing method thereof - Google Patents
Lightweight engine shell and manufacturing method thereof Download PDFInfo
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- CN110819858A CN110819858A CN201911250487.8A CN201911250487A CN110819858A CN 110819858 A CN110819858 A CN 110819858A CN 201911250487 A CN201911250487 A CN 201911250487A CN 110819858 A CN110819858 A CN 110819858A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/103—Other heavy metals copper or alloys of copper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0085—Materials for constructing engines or their parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0095—Constructing engine casings
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a lightweight engine shell and a manufacturing method thereof, relating to the technical field of engine shell manufacturing, and the key points of the technical scheme are that the lightweight engine shell comprises the following components in percentage by mass: si: 5.2 to 6.4 percent; cu: 0.95 to 1.03 percent; fe: 0.8-0.9%; zn: 0.32-0.46%; mn: 0.06-0.12%; mg: 0.10 to 0.15 percent; ti: 0.03-0.05%; sn: 0.015-0.024%; the balance being Al. The invention has the advantages that the engine shell which achieves the aim of light weight and still has high strength characteristic is obtained, and when the engine shell is installed on a vehicle body, the effect of reducing the self weight of the vehicle body and improving the fuel economy is facilitated under the condition of not influencing the strength of the vehicle body.
Description
Technical Field
The invention relates to the technical field of manufacturing of engine housings, in particular to a light-weight engine housing and a manufacturing method thereof.
Background
An engine is a machine that can convert other forms of energy into mechanical energy. In order to effectively reduce the weight of the entire vehicle, casting of the engine case is currently being performed gradually using aluminum alloy instead of gray cast iron.
Chinese patent with publication number CN110195176A discloses a high-strength and high-toughness die-casting aluminum alloy and a preparation method thereof, which is characterized by comprising the following components in percentage by mass: 9 to 11.5 percent of Si, 78 to 4 percent of Cu2, 0.2 to 0.5 percent of Ni0.2 to 0.5 percent of Mg0.2 to 0.5 percent, 0.1 to 0.5 percent of Ti0.5 percent, 0.5 to 1.3 percent of Fe0, 0.5 percent of Mn, 0.02 to 0.3 percent of Sr0, 2 to 5 percent of SiC, 0.03 to 0.2 percent of Sm0, and the balance of aluminum.
However, the strength and mass of the engine housing forged by the die-casting aluminum alloy and the preparation method thereof are insufficient, and the driving performance of the automobile is affected, so that improvement is needed.
Disclosure of Invention
In view of the disadvantages of the prior art, a first object of the present invention is to provide a lightweight engine housing having the effect of achieving weight reduction while maintaining strength.
In order to achieve the purpose, the invention provides the following technical scheme:
a lightweight engine housing comprises the following components in percentage by mass: si: 5.2 to 6.4 percent; cu: 0.95 to 1.03 percent; fe: 0.8-0.9%; zn: 0.32-0.46%; mn: 0.06-0.12%; mg: 0.10 to 0.15 percent; ti: 0.03-0.05%; sn: 0.015-0.024%; the balance being Al.
The invention is further configured to: the outer surface of the engine shell is plated with an aluminum layer, and the thickness of the aluminum layer is 1-2 filaments.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 5.2-6.4% of Si, 0.95-1.03% of Cu, 0.8-0.9% of Fe, 0.32-0.46% of Zn, 0.06-0.12% of Mn, 0.10-0.15% of Mg, 0.03-0.05% of Ti, 0.015-0.024% of Sn and Al used as the balance by mass percent into a mixer to be uniformly mixed to form a raw material mixture;
step 2, adding the raw material mixture into the primary graphite crucible tongs, controlling the temperature to be 720-;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, and drying to obtain a finished shell;
step 5, taking a finished shell for acid washing;
step 6, plating a tin-copper layer on the pickled finished shell;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
The invention is further configured to: the thickness of the tin-copper layer is less than 1 filament, and the ratio of tin to copper in the tin-copper layer is 2: (3-4).
The invention is further configured to: in step 5, the acid washing comprises soaking in 3% dilute sulfuric acid for 1min, and then soaking in 50% nitric acid for 3 min.
The invention is further configured to: in the step 4, a suspension type shot blasting machine is adopted in the shot blasting process, casting blanks are subjected to suspension and blasting treatment, and the shot blasting is performed by using 0.2mm stainless steel shots.
The invention is further configured to: in step 4, the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out.
The invention is further configured to: the set temperature of the carbonization cleaning is 180-220 ℃.
In conclusion, the invention has the following beneficial effects:
1. after an aluminum layer with the thickness of 1-2 wires is oxidized in the air, a compact oxide layer is formed on the outer surface of the engine shell, so that the engine shell has the characteristic of high strength;
2. the obtained engine shell is plated with a tin-copper layer firstly, then plated with an aluminum layer in aluminum water, and tin materials in the tin-copper layer are replaced by the aluminum layer, so that the strength of a connecting structure of the aluminum layer and the engine shell is improved, and the engine shell still has high strength while achieving the purpose of light weight;
3. the obtained engine shell has the characteristics of achieving the aim of light weight and high strength, and when the engine shell is installed on a vehicle body, the engine shell can help to reduce the self weight of the vehicle body under the condition of not influencing the strength of the vehicle body, so that the fuel economy is improved.
Detailed Description
Example one
A lightweight engine housing comprises the following components in percentage by mass: si: 5.2 percent; cu: 0.95 percent; fe: 0.8 percent; zn: 0.32 percent; mn: 0.06 percent; mg: 0.10 percent; ti: 0.03 percent; sn: 0.015 percent; the balance being Al.
Meanwhile, the outer surface of the engine shell is plated with an aluminum layer with the thickness of 1-2 wires, and a compact oxide layer is formed on the outer surface of the engine shell after the aluminum layer is oxidized in the air, so that the engine shell has the characteristic of high strength.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 5.2% of Si, 0.95% of Cu, 0.8% of Fe, 0.32% of Zn, 0.06% of Mn, 0.10% of Mg, 0.03% of Ti, 0.015% of Sn and the balance of Al into a mixer to be uniformly mixed to form a raw material mixture;
step 2, adding the raw material mixture into a preliminary graphite crucible tongs, controlling the temperature to be 720 ℃, dissolving the raw material mixture and forming molten liquid to be cast;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, wherein the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out at a set temperature of 180 ℃, and then drying to obtain a finished shell;
step 5, pickling the finished shell, wherein the pickling comprises soaking the shell in 3% dilute sulfuric acid for 1min and then soaking the shell in 50% nitric acid for 3 min;
step 6, plating a tin-copper layer on the pickled finished product shell, wherein the thickness of the tin-copper layer is less than 1 wire, and the ratio of tin to copper in the tin-copper layer is 2: 3;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
In step 4, a suspension type shot blasting machine is adopted in the shot blasting process, and casting blanks are subjected to suspension and throwing treatment, wherein the shot blasting adopts 0.2mm stainless steel shots.
Example two
A lightweight engine housing comprises the following components in percentage by mass: si: 5.4 percent; cu: 0.97 percent; fe: 0.83 percent; zn: 0.36 percent; mn: 0.08 percent; mg: 0.11 percent; ti: 0.04 percent; sn: 0.017 percent; the balance being Al.
Meanwhile, the outer surface of the engine shell is plated with an aluminum layer with the thickness of 1-2 wires, and a compact oxide layer is formed on the outer surface of the engine shell after the aluminum layer is oxidized in the air, so that the engine shell has the characteristic of high strength.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 5.4% of Si, 0.97% of Cu, 0.83% of Fe, 0.36% of Zn, 0.08% of Mn, 0.11% of Mg, 0.04% of Ti, 0.017% of Sn and the balance of Al into a mixer by mass percent, and uniformly mixing to form a raw material mixture;
step 2, adding the raw material mixture into a preliminary graphite crucible tongs, controlling the temperature to be 730 ℃, dissolving the raw material mixture and forming molten liquid to be cast;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, wherein the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out at a set temperature of 180 ℃, and then drying to obtain a finished shell;
step 5, pickling the finished shell, wherein the pickling comprises soaking the shell in 3% dilute sulfuric acid for 1min and then soaking the shell in 50% nitric acid for 3 min;
step 6, plating a tin-copper layer on the pickled finished product shell, wherein the thickness of the tin-copper layer is less than 1 wire, and the ratio of tin to copper in the tin-copper layer is 2: 3;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
In step 4, a suspension type shot blasting machine is adopted in the shot blasting process, and casting blanks are subjected to suspension and throwing treatment, wherein the shot blasting adopts 0.2mm stainless steel shots.
EXAMPLE III
A lightweight engine housing comprises the following components in percentage by mass: si: 5.8 percent; cu: 0.99 percent; fe: 0.85 percent; zn: 0.39 percent; mn: 0.09%; mg: 0.13 percent; ti: 0.04 percent; sn: 0.02 percent; the balance being Al.
Meanwhile, the outer surface of the engine shell is plated with an aluminum layer with the thickness of 1-2 wires, and a compact oxide layer is formed on the outer surface of the engine shell after the aluminum layer is oxidized in the air, so that the engine shell has the characteristic of high strength.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 5.8% of Si, 0.99% of Cu, 0.85% of Fe, 0.39% of Zn, 0.09% of Mn, 0.13% of Mg, 0.04% of Ti, 0.02% of Sn and the balance of Al into a mixer by mass percent, uniformly mixing and forming a raw material mixture;
step 2, adding the raw material mixture into a preliminary graphite crucible tongs, controlling the temperature to be 730 ℃, dissolving the raw material mixture and forming molten liquid to be cast;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, wherein the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out at a set temperature of 180 ℃, and then drying to obtain a finished shell;
step 5, pickling the finished shell, wherein the pickling comprises soaking the shell in 3% dilute sulfuric acid for 1min and then soaking the shell in 50% nitric acid for 3 min;
step 6, plating a tin-copper layer on the pickled finished product shell, wherein the thickness of the tin-copper layer is less than 1 wire, and the ratio of tin to copper in the tin-copper layer is 2: 3.5;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
In step 4, a suspension type shot blasting machine is adopted in the shot blasting process, and casting blanks are subjected to suspension and throwing treatment, wherein the shot blasting adopts 0.2mm stainless steel shots.
Example four
A lightweight engine housing comprises the following components in percentage by mass: si: 6.1 percent; cu: 1.01 percent; fe: 0.88 percent; zn: 0.42 percent; mn: 0.1 percent; mg: 0.14 percent; ti: 0.04 percent; sn: 0.022%; the balance being Al.
Meanwhile, the outer surface of the engine shell is plated with an aluminum layer with the thickness of 1-2 wires, and a compact oxide layer is formed on the outer surface of the engine shell after the aluminum layer is oxidized in the air, so that the engine shell has the characteristic of high strength.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 6.1% of Si, 1.01% of Cu, 0.88% of Fe, 0.42% of Zn, 0.1% of Mn, 0.14% of Mg, 0.04% of Ti, 0.022% of Sn and Al used as the balance by mass percent into a mixer to be uniformly mixed to form a raw material mixture;
step 2, adding the raw material mixture into a preliminary graphite crucible tongs, controlling the temperature to be 730 ℃, dissolving the raw material mixture and forming molten liquid to be cast;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, wherein the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out at a set temperature of 180 ℃, and then drying to obtain a finished shell;
step 5, pickling the finished shell, wherein the pickling comprises soaking the shell in 3% dilute sulfuric acid for 1min and then soaking the shell in 50% nitric acid for 3 min;
step 6, plating a tin-copper layer on the pickled finished product shell, wherein the thickness of the tin-copper layer is less than 1 wire, and the ratio of tin to copper in the tin-copper layer is 2: 4;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
In step 4, a suspension type shot blasting machine is adopted in the shot blasting process, and casting blanks are subjected to suspension and throwing treatment, wherein the shot blasting adopts 0.2mm stainless steel shots.
EXAMPLE five
A lightweight engine housing comprises the following components in percentage by mass: si: 6.4 percent; cu: 1.03 percent; fe: 0.9 percent; zn: 0.46 percent; mn: 0.12 percent; mg: 0.15 percent; ti: 0.05 percent; sn: 0.024%; the balance being Al.
Meanwhile, the outer surface of the engine shell is plated with an aluminum layer with the thickness of 1-2 wires, and a compact oxide layer is formed on the outer surface of the engine shell after the aluminum layer is oxidized in the air, so that the engine shell has the characteristic of high strength.
The invention also provides a manufacturing method of the light-weight engine shell, which comprises the following steps:
step 1, adding 6.4% of Si, 1.03% of Cu, 0.9% of Fe, 0.46% of Zn, 0.12% of Mn, 0.15% of Mg, 0.05% of Ti, 0.024% of Sn and Al used as the balance by mass percent into a mixer, and uniformly mixing to form a raw material mixture;
step 2, adding the raw material mixture into a preliminary graphite crucible tongs, controlling the temperature to be 740 ℃, dissolving the raw material mixture and forming molten liquid to be cast;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, wherein the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out at a set temperature of 180 ℃, and then drying to obtain a finished shell;
step 5, pickling the finished shell, wherein the pickling comprises soaking the shell in 3% dilute sulfuric acid for 1min and then soaking the shell in 50% nitric acid for 3 min;
step 6, plating a tin-copper layer on the pickled finished product shell, wherein the thickness of the tin-copper layer is less than 1 wire, and the ratio of tin to copper in the tin-copper layer is 2: 4;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
In step 4, a suspension type shot blasting machine is adopted in the shot blasting process, and casting blanks are subjected to suspension and throwing treatment, wherein the shot blasting adopts 0.2mm stainless steel shots.
Comparative example 1
The difference between the first comparative example and the third example is that the first comparative example directly performs step 7, namely aluminizing the finished shell after acid washing after the step 5.
Comparative example No. two
The difference between the second comparative example and the third example is that the second comparative example completes the manufacture of the engine housing after completing the step 4 and obtains the engine housing, namely, the surface of the engine housing is not plated with aluminum.
The engine cases obtained in examples 1 to 5 and comparative examples 1 to 2 were subjected to performance tests, and the results were as follows:
table 1: performance of the Engine housings of examples 1 to 5 and comparative examples 1 to 2
| Tensile strength (Mpa) | Yield strength (Mpa) | Elongation (%) | Hardness (HV) | |
| Example one | 1236 | 957 | 18 | 290 |
| Example two | 1242 | 959 | 17 | 294 |
| EXAMPLE III | 1249 | 960 | 18 | 298 |
| Example four | 1247 | 956 | 17 | 292 |
| EXAMPLE five | 1241 | 953 | 17 | 291 |
| Comparative example 1 | 1186 | 901 | 13 | 218 |
| Comparative example No. two | 1031 | 842 | 22 | 128 |
As described above, the aluminum plating on the surface of the engine case obtained by the method of the present invention increases the percentage of the aluminum alloy to achieve the purpose of weight reduction, and the aluminum oxide layer having a dense surface has a high strength property, thereby contributing to reduction of the self weight of the vehicle body and improving fuel economy without affecting the strength of the vehicle body when the engine case is mounted on the vehicle body.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the present invention may occur to those skilled in the art without departing from the principle of the present invention, and such modifications and embellishments should also be considered as within the scope of the present invention.
Claims (8)
1. The light-weight engine shell is characterized by comprising the following components in percentage by mass: si: 5.2 to 6.4 percent; cu: 0.95 to 1.03 percent; fe: 0.8-0.9%; zn: 0.32-0.46%; mn: 0.06-0.12%; mg: 0.10 to 0.15 percent; ti: 0.03-0.05%; sn: 0.015-0.024%; the balance being Al.
2. A lightweight engine housing as set forth in claim 1, wherein: the outer surface of the engine shell is plated with an aluminum layer, and the thickness of the aluminum layer is 1-2 filaments.
3. A method for manufacturing a lightweight engine case, characterized by comprising the steps of:
step 1, adding 5.2-6.4% of Si, 0.95-1.03% of Cu, 0.8-0.9% of Fe, 0.32-0.46% of Zn, 0.06-0.12% of Mn, 0.10-0.15% of Mg, 0.03-0.05% of Ti, 0.015-0.024% of Sn and Al used as the balance by mass percent into a mixer to be uniformly mixed to form a raw material mixture;
step 2, adding the raw material mixture into the primary graphite crucible tongs, controlling the temperature to be 720-;
step 3, guiding the molten liquid to be cast into a casting machine for casting, and cooling to obtain a casting blank;
step 4, sequentially carrying out deburring, shot blasting, side leakage and carbonization cleaning on the casting blank, and drying to obtain a finished shell;
step 5, taking a finished shell for acid washing;
step 6, plating a tin-copper layer on the pickled finished shell;
step 7, putting the finished shell plated with the tin-copper layer into 670 ℃ aluminum water, and rotating the finished shell for 30s at a rotating speed of 60r/min by a rotator to plate a layer of aluminum on the finished shell;
and 8, cooling and obtaining the engine shell.
4. A method of manufacturing a lightweight engine case according to claim 3, characterized in that: the thickness of the tin-copper layer is less than 1 filament, and the ratio of tin to copper in the tin-copper layer is 2: (3-4).
5. The method for manufacturing the light-weight engine housing according to claim 3, wherein in the step 5, the pickling comprises soaking in 3% dilute sulfuric acid for 1min and then soaking in 50% nitric acid for 3 min.
6. A method of manufacturing a lightweight engine case according to claim 3, characterized in that: in the step 4, a suspension type shot blasting machine is adopted in the shot blasting process, casting blanks are subjected to suspension and blasting treatment, and the shot blasting is performed by using 0.2mm stainless steel shots.
7. A method of manufacturing a lightweight engine case according to claim 3, characterized in that: in step 4, the carbonization cleaning comprises vacuum cleaning, degassing cleaning and steam cleaning which are sequentially carried out.
8. A method of manufacturing a lightweight engine case according to claim 3, characterized in that: the set temperature of the carbonization cleaning is 180-220 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250487.8A CN110819858A (en) | 2019-12-09 | 2019-12-09 | Lightweight engine shell and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911250487.8A CN110819858A (en) | 2019-12-09 | 2019-12-09 | Lightweight engine shell and manufacturing method thereof |
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| CN110819858A true CN110819858A (en) | 2020-02-21 |
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| CN201911250487.8A Pending CN110819858A (en) | 2019-12-09 | 2019-12-09 | Lightweight engine shell and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116291938A (en) * | 2023-03-27 | 2023-06-23 | 江苏大学 | Light-weight high-strength engine body of low-carbon combustion engine |
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2019
- 2019-12-09 CN CN201911250487.8A patent/CN110819858A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116291938A (en) * | 2023-03-27 | 2023-06-23 | 江苏大学 | Light-weight high-strength engine body of low-carbon combustion engine |
| CN116291938B (en) * | 2023-03-27 | 2024-04-12 | 江苏大学 | Light-weight high-strength engine body of low-carbon combustion engine |
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