CN111101073A - Flange preparation method based on three-plate mold - Google Patents
Flange preparation method based on three-plate mold Download PDFInfo
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- CN111101073A CN111101073A CN201911393706.8A CN201911393706A CN111101073A CN 111101073 A CN111101073 A CN 111101073A CN 201911393706 A CN201911393706 A CN 201911393706A CN 111101073 A CN111101073 A CN 111101073A
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- molten liquid
- alloy molten
- vermiculizer
- alloy
- plate mold
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a flange preparation method based on a three-plate die, which comprises the following steps: (a) weighing the raw materials in proportion, placing the raw materials into a smelting furnace, and carrying out overheating melting at 1450-1500 ℃ in an argon atmosphere to obtain alloy molten liquid; cooling the alloy molten liquid to 1350-1400 ℃, and introducing the alloy molten liquid into a spheroidizing bag containing a vermiculizer and scrap iron; the vermiculizer and the scrap iron are sequentially arranged in the spheroidizing ladle from bottom to top, and the mass of the vermiculizer is 0.8-1% of that of the alloy molten liquid; (b) injecting the spheroidized alloy molten liquid into a cavity of a three-plate mold die, and performing low-pressure casting to obtain a casting blank; the three-plate mold is formed by splicing three templates which are sequentially arranged from left to right, and each template is provided with an alloy melt injection port. Therefore, the flow of the alloy molten liquid can be effectively reduced, the contact time of the alloy molten liquid and oxygen is reduced, and the quality of the casting is improved.
Description
Technical Field
The invention belongs to the field of casting, relates to a flange preparation method, and particularly relates to a flange preparation method based on a three-plate mold.
Background
The flange shown in fig. 1 comprises a flange body 1, a groove 3 formed on the inner surface of the flange body 1, a plurality of kidney-shaped holes 6 formed in the flange body 1 and penetrating through the inner surface and the outer surface of the flange body, a plurality of mounting holes 2 formed in the end face of the flange body 1 and penetrating through the flange body, and a plurality of through holes 5 formed in the flange body 1 and penetrating through the inner surface and the outer surface of the flange body, wherein the through holes 5 and the kidney-shaped holes 6 are arranged at intervals. When the flange is manufactured, a flange casting with machining allowance is obtained, and a finished product is obtained after machining treatment. However, due to the different flange specifications (mainly different sizes), different manufacturing is required.
The Chinese patent with application number 201810823742.2 discloses a method for preparing a flange, which comprises the following steps: (a) weighing the raw materials in proportion and placing the raw materials into a smelting furnace; (b) cooling the alloy molten liquid to 1350-1400 ℃; (c) annealing and finish machining; (d) performing carburizing treatment under the condition that the carbon potential is 1.0-1.2, and naturally cooling to room temperature; (e) performing sand blasting treatment on the workpiece obtained in the step (d) to enable the surface roughness of the workpiece to reach 5-8 microns; (f) taking polyether-ether-ketone-based powder with the particle size of 20-100 mu m as spraying powder; (g) and then naturally cooling to room temperature. However, the process uses a sand mould, and is generally only suitable for smaller sizes (such as the case of the flange body 1 with an inner diameter of less than or equal to 15 cm). When the inner diameter of the flange body 1 is not less than 25cm, the reduction of the oxidizing component in the alloy is difficult to be realized by the method due to the increase of the length of the flow passage, and pores are easily generated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a flange preparation method based on a three-plate die.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for preparing a flange based on a three-plate die comprises the following components in percentage by mass: 0.5-0.6%, Ni: 0.05-0.2%, Al: 2-4%, Mo: 0.3-0.4%, Cr: 0.3-0.4%, V: 5-8%, Zn: 0.28-3.0%, Ti: 0.03-0.06% and the balance of Fe and other inevitable impurities; the preparation method comprises the following steps: (a) weighing the raw materials in proportion, placing the raw materials into a smelting furnace, and carrying out overheating melting at 1450-1500 ℃ in an argon atmosphere to obtain alloy molten liquid; cooling the alloy molten liquid to 1350-1400 ℃, and introducing the alloy molten liquid into a spheroidizing bag containing a vermiculizer and scrap iron; the vermiculizer and the scrap iron are sequentially arranged in the spheroidizing ladle from bottom to top, and the mass of the vermiculizer is 0.8-1% of that of the alloy molten liquid;
it also includes the following steps: (b) injecting the spheroidized alloy molten liquid into a cavity of a three-plate mold die, and performing low-pressure casting to obtain a casting blank; the three-plate mold is formed by splicing three templates which are sequentially arranged from left to right, and each template is provided with an alloy melt injection port.
Optimally, in step (b), the three-plate die is preheated to at least 200 ℃.
Further, the injection speed of the alloy melt is 1.2-1.5 m/s, and the casting pressure is 20-30 MPa.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the flange preparation method based on the three-plate mold, the three-plate mold is spliced by the three templates to perform low-pressure casting molding, so that each template is provided with the alloy melt injection port, the flow of the alloy melt can be effectively reduced, the contact time of the alloy melt and oxygen is reduced, and the quality and the performance of a casting are improved.
Drawings
FIG. 1 is a schematic structural view of a flange according to the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a flange preparation method based on a three-plate mold, wherein the flange comprises the following components in percentage by mass: 0.5-0.6%, Ni: 0.05-0.2%, Al: 2-4%, Mo: 0.3-0.4%, Cr: 0.3-0.4%, V: 5-8%, Zn: 0.28-3.0%, Ti: 0.03-0.06% and the balance of Fe and other inevitable impurities;
the preparation method comprises the following steps:
(a) weighing the raw materials in proportion, placing the raw materials into a smelting furnace, and carrying out overheating melting at 1450-1500 ℃ in an argon atmosphere to obtain alloy molten liquid; cooling the alloy molten liquid to 1350-1400 ℃, and introducing the alloy molten liquid into a spheroidizing bag containing a vermiculizer and scrap iron; the vermiculizer and the scrap iron are sequentially arranged in the spheroidizing ladle from bottom to top, and the mass of the vermiculizer is 0.8-1% of that of the alloy molten liquid;
(b) injecting the spheroidized alloy molten liquid into a cavity of a three-plate mold die, and performing low-pressure casting to obtain a casting blank; the three-plate mold is formed by splicing three templates which are sequentially arranged from left to right, and each template is provided with an alloy melt injection port; preheating a three-plate mould to 200 ℃; the injection speed of the alloy melt is 1.2-1.5 m/s, and the casting pressure is 20-30 MPa.
Comparative example 1
This example provides a method of manufacturing a flange substantially as described in example 1, except that step (b) is different; the step (b) is specifically as follows: and injecting the spheroidized alloy molten liquid into a sand mold for cooling and molding.
Table 1 performance table of flanges in example 1 and comparative example 1
| Tensile strength (MPa) | Yield strength (MPa) | |
| Example 1 | 680～720 | 600～650 |
| Comparative example 1 | 600～650 | 550～580 |
As can be seen from table 1, the performance interval of the castings obtained by low-pressure casting using the three-plate mold in example 1 is much higher than that of the prior art in comparative example 1, resulting in significant performance improvement; and the surface of the casting in example 1 has very few pores, which is superior to that in comparative example 1.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. A method for preparing a flange based on a three-plate die comprises the following components in percentage by mass: 0.5-0.6%, Ni: 0.05-0.2%, Al: 2-4%, Mo: 0.3-0.4%, Cr: 0.3-0.4%, V: 5-8%, Zn: 0.28-3.0%, Ti: 0.03-0.06% and the balance of Fe and other inevitable impurities; the preparation method comprises the following steps: (a) weighing the raw materials in proportion, placing the raw materials into a smelting furnace, and carrying out overheating melting at 1450-1500 ℃ in an argon atmosphere to obtain alloy molten liquid; cooling the alloy molten liquid to 1350-1400 ℃, and introducing the alloy molten liquid into a spheroidizing bag containing a vermiculizer and scrap iron; the vermiculizer and the scrap iron are sequentially arranged in the spheroidizing ladle from bottom to top, and the mass of the vermiculizer is 0.8-1% of that of the alloy molten liquid;
it is characterized by also comprising the following steps: (b) injecting the spheroidized alloy molten liquid into a cavity of a three-plate mold die, and performing low-pressure casting to obtain a casting blank; the three-plate mold is formed by splicing three templates which are sequentially arranged from left to right, and each template is provided with an alloy melt injection port.
2. The method for preparing a flange based on a three-plate die as claimed in claim 1, wherein the method comprises the following steps: in step (b), the three-plate die is preheated to at least 200 ℃.
3. The method for preparing a flange based on a three-plate mold according to claim 1 or 2, wherein: the injection speed of the alloy melt is 1.2-1.5 m/s, and the casting pressure is 20-30 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393706.8A CN111101073A (en) | 2019-12-30 | 2019-12-30 | Flange preparation method based on three-plate mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393706.8A CN111101073A (en) | 2019-12-30 | 2019-12-30 | Flange preparation method based on three-plate mold |
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| Publication Number | Publication Date |
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| CN111101073A true CN111101073A (en) | 2020-05-05 |
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| CN201911393706.8A Pending CN111101073A (en) | 2019-12-30 | 2019-12-30 | Flange preparation method based on three-plate mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058664A (en) * | 2022-06-27 | 2022-09-16 | 江阴市龙润法兰有限公司 | High-sealing-performance pipeline flange and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950416A (en) * | 2018-07-25 | 2018-12-07 | 苏州利达铸造有限公司 | A kind of preparation method of flange |
-
2019
- 2019-12-30 CN CN201911393706.8A patent/CN111101073A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950416A (en) * | 2018-07-25 | 2018-12-07 | 苏州利达铸造有限公司 | A kind of preparation method of flange |
Non-Patent Citations (2)
| Title |
|---|
| 一机部铸造研究所、中国科学院技术情报研究所重庆分所: "《低压铸造国外译文集》", 31 July 1978 * |
| 国家职业资格培训教材研究组: "《铸造工技能与实训》", 31 July 2006, 珠海出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058664A (en) * | 2022-06-27 | 2022-09-16 | 江阴市龙润法兰有限公司 | High-sealing-performance pipeline flange and preparation method thereof |
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