CN111906247A - Preparation process of supercharger turbine for national six-emission heavy diesel engine - Google Patents
Preparation process of supercharger turbine for national six-emission heavy diesel engine Download PDFInfo
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- CN111906247A CN111906247A CN202010625765.XA CN202010625765A CN111906247A CN 111906247 A CN111906247 A CN 111906247A CN 202010625765 A CN202010625765 A CN 202010625765A CN 111906247 A CN111906247 A CN 111906247A
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- turbine
- ceramic shell
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- wax
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a preparation process of a supercharger turbine for a national six-emission heavy-duty diesel engine, which adopts an INCO713C high-temperature alloy material, and welds a cooled turbine wax mold on a wax mold pouring gate from a turbine welding end to form a wax mold group tree, so that the subsequent casting from the turbine welding end is convenient, the strength of a part is improved, a zircon powder slurry is adopted to form a ceramic shell outside the wax mold group tree, and the ceramic shell has good high temperature resistance, small thermal expansion coefficient and excellent chemical stability in the high-temperature use process; the turbine wax mold in the ceramic shell is removed by high-temperature steam, the method is efficient and environment-friendly, the dewaxed hollow ceramic shell cavity is roasted to enhance the strength and air permeability of the shell, the roasting time is 60-100 minutes, the shell can be completely roasted without being roasted, the roasting quality and strength of the shell can be ensured, energy sources are not wasted, the casting time is controlled to be 6-8 seconds, the problem that the contact time of a solution and air is long, the defect of internal cracks is easily caused is avoided, and the defect that a turbine is not cast in situ is avoided.
Description
The technical field is as follows:
the invention relates to a preparation process of a supercharger turbine for a national six-emission heavy diesel engine.
Background art:
under the rapid development of the automobile industry, energy conservation and environmental protection are becoming more and more popular. According to the national fuel consumption regulation, the average fuel consumption of passenger cars is reduced to 5L/100KM by 2020, and the average fuel consumption of passenger cars is reduced to 4L/100KM by 2025, and the national six standard which is the most strict emission standard in history is continuously implemented in various places from this year. The turbocharging technology can meet the oil consumption requirement and simultaneously improve the driving performance of the automobile, and is widely adopted by automobile enterprises as an economic and effective energy-saving and emission-reducing technology. The development of turbocharger turbine products for the national six-emission heavy-duty diesel engine is developed according to the requirements of national six standards. In recent years, with the increasing demands of the market on engine efficiency and emission, turbocharging is gradually developed towards miniaturization and higher efficiency. The turbocharging is innovatively realized, and the turbocharging is lower in consumption and high in efficiency. The design of a novel supercharger turbine for a full-back-plate heavy diesel engine meets the strict requirements of national six standards, and mainly has the following problems: the back plate has large area, and the back plane is easy to deform and cannot meet the size requirement.
The invention content is as follows:
the invention provides a preparation process of a supercharger turbine for a national six-emission heavy-duty diesel engine, aiming at solving the problems in the prior art.
The technical scheme adopted by the invention is as follows: a preparation process of a supercharger turbine for a national six-emission heavy diesel engine comprises the following steps:
the method comprises the following steps: selecting INCO713C high temperature alloy as raw material, and processing into cylindrical master alloy with bottom diameter of 40-80mm and weight of 1.0-3.0 kg;
step two: adding the cylindrical master alloy into a vacuum induction fast melting furnace, and melting at the vacuum degree of less than 10Pa and the temperature of 1400-1600 ℃;
step three: preparing a mould:
a. a precision casting turbine wax mold die is arranged according to a three-dimensional model designed by a mixed flow turbine to be processed, the die structure is one die and one cavity, in order to meet the size requirement of a full back plate, the area of the back plate is large, the back plane is easy to deform, the deformation rule of the back plane is found through process tests and size research, and the die is modified through pre-deformation design;
b. injecting 50-80 ℃ molten wax into a turbine wax mold die by adopting a wax injection machine with 50 ton pressure to form a turbine wax mold;
c. welding the cooled turbine wax mold on a wax mold pouring gate from a turbine welding end to form a wax mold group tree;
d. forming a ceramic shell with the thickness of 5-10mm outside the wax module tree by adopting zircon powder slurry;
e. removing the turbine wax mold in the ceramic shell by using 100-plus-200 ℃ high-temperature steam to form an empty ceramic shell cavity;
f. placing the hollow ceramic shell in a roasting furnace, roasting for 60-100min at the temperature of 1000-1300 ℃ to form a high-strength ceramic shell cavity with clean interior;
pouring the INCO713C liquid melted in the step two into the high-strength ceramic shell cavity roasted at high temperature from the pouring gate to form a casting, wherein the casting time is 2-8 s;
step five: and removing the ceramic shell on the surface of the casting by shot blasting.
Further, in the first step, 2.7Kg of INCO713C cylindrical master alloy with the diameter of 50mm and the weight is selected;
further, in the second step, the cylindrical master alloy is melted at the vacuum degree of 3Pa and the temperature of 1500 ℃.
Further, the hollow ceramic shell in the third step is placed in a roasting furnace and roasted for 70min at 1100 ℃ to form a high-strength ceramic shell cavity with a clean interior.
Further, the step four casting time is 3 s.
The invention has the following beneficial effects:
the turbine wax mold is formed by welding the cooled turbine wax mold on the wax mold pouring gate from the turbine welding end by adopting the INCO713C high-temperature alloy material, so that the subsequent casting from the turbine welding end is facilitated, the strength of a part is improved, a ceramic shell with the thickness of 5-10mm is formed outside the wax mold by adopting zircon powder slurry, and the turbine wax mold has good high temperature resistance, small thermal expansion coefficient and excellent chemical stability in the high-temperature use process; the method has the advantages of high efficiency and environmental protection, and is characterized in that the turbine wax mold in the ceramic shell is removed by high-temperature steam, the dewaxed hollow ceramic shell cavity is roasted at the roasting temperature of 1000-1300 ℃ to enhance the strength and air permeability of the shell, the roasting time is 60-100 minutes, so that the hollow ceramic shell cavity can be completely roasted without overburning, the roasting quality and strength of the mold shell can be ensured, and energy sources are not wasted.
The specific implementation mode is as follows:
example 1
The invention relates to a preparation process of a supercharger turbine for a national six-emission heavy diesel engine, which comprises the following steps of:
the method comprises the following steps: selecting INCO713C as a raw material, and processing the raw material into a cylindrical master alloy with the bottom diameter of 50mm and the weight of 2.7 kg;
step two: adding the cylindrical master alloy into a vacuum induction fast melting furnace, and melting at the vacuum degree of 3Pa and the temperature of 1500 ℃;
step three: preparing a mould:
a. a precision casting turbine wax mold is arranged according to a three-dimensional model designed by a mixed flow turbine to be processed, and the mold structure is one mold and one cavity; for a turbine with the diameter of 90mm, the back plane is subjected to pre-deformation design, the maximum position is 0.1mm, and the size requirement of the back plane profile degree of 0.25 is met;
b. injecting 65 ℃ molten wax material into a turbine wax mold die to form a turbine wax mold by adopting a wax injection machine with the pressure of 50 tons;
c. welding the cooled turbine wax mold on a wax mold pouring gate from a turbine welding end to form a wax mold group tree;
d. forming a ceramic shell with the thickness of 8mm outside the wax module tree by adopting zircon powder slurry;
e. removing the turbine wax mold in the ceramic shell by adopting high-temperature steam at 150 ℃ to form an empty ceramic shell cavity;
f. placing the hollow ceramic shell in a roasting furnace, roasting at 1100 ℃ for 70min to form a high-strength ceramic shell cavity with a clean interior;
pouring the INCO713C liquid melted in the step three into the high-strength ceramic shell cavity roasted at high temperature from the pouring gate to form a casting, wherein the casting time is 3 s;
step five: and removing the ceramic shell on the surface of the casting by shot blasting.
Example 2
The invention relates to a preparation process of a high-strength mixed-flow supercharged turbine for an athletic racing car, which comprises the following steps of:
the method comprises the following steps: selecting INCO713C as a raw material, and processing the raw material into a cylindrical master alloy with the bottom diameter of 60mm and the weight of 3.3 kg;
step two: adding the cylindrical master alloy into a vacuum induction fast melting furnace, and melting at the vacuum degree of 3Pa and the temperature of 1550 ℃;
step three: preparing a mould:
a. a precision casting turbine wax mold is arranged according to a three-dimensional model designed by a mixed flow turbine to be processed, and the mold structure is one mold and one cavity; for a turbine with the diameter of 94mm, the back plane is designed to be pre-deformed, the maximum position is 0.15mm, and the size requirement of 0.25 of the profile tolerance of the back plane is met;
b. injecting molten wax material at 68 ℃ into a turbine wax mold die by adopting a wax injection machine with the pressure of 50 tons to form a turbine wax mold;
c. welding the cooled turbine wax mold on a wax mold pouring gate from a turbine welding end to form a wax mold group tree;
d. forming a ceramic shell with the thickness of 10mm outside the wax module tree by adopting zircon powder slurry;
e. removing the turbine wax mold in the ceramic shell by adopting high-temperature steam at 180 ℃ to form an empty ceramic shell cavity;
f. placing the hollow ceramic shell in a roasting furnace, roasting for 80min at 1100 ℃ to form a high-strength ceramic shell cavity with a clean interior;
pouring the INCO713C liquid melted in the step three into the high-strength ceramic shell cavity roasted at high temperature from the pouring gate to form a casting, wherein the casting time is 4 s;
step five: the ceramic shell on the surface of the casting is removed by sand blasting.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (5)
1. A preparation process of a supercharger turbine for a national six-emission heavy diesel engine is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps: selecting INCO713C high temperature alloy as raw material, and processing into cylindrical master alloy with bottom diameter of 40-80mm and weight of 1.0-3.0 kg;
step two: adding the cylindrical master alloy into a vacuum induction fast melting furnace, and melting at the vacuum degree of less than 10Pa and the temperature of 1400-1600 ℃;
step three: preparing a mould:
a. a turbine wax mold is arranged according to a three-dimensional model designed by a mixed flow turbine to be processed, and the mold structure is one mold and one cavity;
b. injecting 50-80 ℃ molten wax into a turbine wax mold die by adopting a wax injection machine with 50 ton pressure to form a turbine wax mold;
c. welding the cooled turbine wax mold on a wax mold pouring gate from a turbine welding end to form a wax mold group tree;
d. forming a ceramic shell with the thickness of 5-10mm outside the wax module tree by adopting zircon powder slurry;
e. removing the turbine wax mold in the ceramic shell by using 100-plus-200 ℃ high-temperature steam to form an empty ceramic shell cavity;
f. placing the hollow ceramic shell in a roasting furnace, roasting for 60-100min at the temperature of 1000-1300 ℃ to form a ceramic shell cavity with clean interior;
pouring the INCO713C liquid melted in the step two into the fired ceramic shell cavity from the pouring gate to form a casting, wherein the casting time is 2-8 s;
step five: and removing the ceramic shell on the surface of the casting by shot blasting.
2. The process for preparing the supercharger turbine for the national six-emission heavy-duty diesel engine according to claim 1, wherein the process comprises the following steps: in the first step, an INCO713C cylindrical master alloy with the diameter of 50mm and the weight of 2.7Kg is selected.
3. The process for preparing the supercharger turbine for the national six-emission heavy-duty diesel engine according to claim 1, wherein the process comprises the following steps: and in the second step, the cylindrical master alloy is melted at the vacuum degree of 3Pa and the temperature of 1500 ℃.
4. The process for preparing the supercharger turbine for the national six-emission heavy-duty diesel engine according to claim 1, wherein the process comprises the following steps: and (3) placing the hollow ceramic shell in the step three into a roasting furnace, and roasting at 1100 ℃ for 70min to form a ceramic shell cavity with a clean interior.
5. The process for preparing the supercharger turbine for the national six-emission heavy-duty diesel engine according to claim 1, wherein the process comprises the following steps: and in the fourth step, the casting time is 3 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010625765.XA CN111906247A (en) | 2020-07-01 | 2020-07-01 | Preparation process of supercharger turbine for national six-emission heavy diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010625765.XA CN111906247A (en) | 2020-07-01 | 2020-07-01 | Preparation process of supercharger turbine for national six-emission heavy diesel engine |
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| CN111906247A true CN111906247A (en) | 2020-11-10 |
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| CN202010625765.XA Pending CN111906247A (en) | 2020-07-01 | 2020-07-01 | Preparation process of supercharger turbine for national six-emission heavy diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010516A (en) * | 2022-06-30 | 2022-09-06 | 西峡飞龙特种铸造有限公司 | Filter manufacturing method and filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992268A (en) * | 2010-11-20 | 2011-03-30 | 沈阳工业大学 | Preparation process of high-temperature alloy multigang hollow turbine blade |
| CN105618679A (en) * | 2015-12-30 | 2016-06-01 | 青岛博泰美联化工技术有限公司 | Preparation method for automobile charging turbine |
| CN108856655A (en) * | 2018-06-29 | 2018-11-23 | 无锡范尼韦尔工程有限公司 | A kind of preparation process of the high-intensitive mixed flow charging turbine of sports racing car |
| CN109909445A (en) * | 2019-01-25 | 2019-06-21 | 上海交通大学 | Inhibit the ceramic shell and preparation method of the scab of high-temperature alloy turbine blade surface |
-
2020
- 2020-07-01 CN CN202010625765.XA patent/CN111906247A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992268A (en) * | 2010-11-20 | 2011-03-30 | 沈阳工业大学 | Preparation process of high-temperature alloy multigang hollow turbine blade |
| CN105618679A (en) * | 2015-12-30 | 2016-06-01 | 青岛博泰美联化工技术有限公司 | Preparation method for automobile charging turbine |
| CN108856655A (en) * | 2018-06-29 | 2018-11-23 | 无锡范尼韦尔工程有限公司 | A kind of preparation process of the high-intensitive mixed flow charging turbine of sports racing car |
| CN109909445A (en) * | 2019-01-25 | 2019-06-21 | 上海交通大学 | Inhibit the ceramic shell and preparation method of the scab of high-temperature alloy turbine blade surface |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010516A (en) * | 2022-06-30 | 2022-09-06 | 西峡飞龙特种铸造有限公司 | Filter manufacturing method and filter |
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Application publication date: 20201110 |
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| RJ01 | Rejection of invention patent application after publication |