CN112658213A - Casting method of metal part - Google Patents
Casting method of metal part Download PDFInfo
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- CN112658213A CN112658213A CN202011411256.3A CN202011411256A CN112658213A CN 112658213 A CN112658213 A CN 112658213A CN 202011411256 A CN202011411256 A CN 202011411256A CN 112658213 A CN112658213 A CN 112658213A
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Abstract
The invention relates to a casting method of a metal part, which comprises the following steps: degreasing, washing and drying the raw materials of the metal parts to be cast; melting the dried raw materials of the metal parts; cleaning and drying the casting mold; injecting the molten metal part raw material into a casting mould to obtain a casting mould; vacuumizing the casting mould from a pouring gate under the condition of constant temperature, and solidifying and feeding; cooling the casting mold for demolding to obtain a casting; and grinding and polishing the casting to obtain the required metal part. According to the invention, through pretreatment of the raw materials of the metal parts and by adopting the segmented temperature rise casting mold, the defects of low surface quality and insufficient structural strength of the metal parts are overcome, through setting reasonable casting parameters, the crystal grains of the metal parts are effectively improved, the mechanical property is improved, the function of the casting is ensured, and the use requirements of current customers are further met.
Description
Technical Field
The invention relates to the technical field of casting processing, in particular to a casting method of a metal part.
Background
The metal parts are indispensable important components in mechanical equipment, the mechanical equipment needs the metal parts with different shapes, sizes and performances, and the metal parts have excellent performances in all aspects and are very wide in application. Casting is one of the indispensable steps for the production of metal parts. However, the metal parts processed by the current casting method for the metal parts have the defects of low surface quality and insufficient structural strength, and the metal parts have poor mechanical properties due to fine crystal grains, so that the use requirements of current customers cannot be met.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a casting method of a metal part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material with water, taking out the metal part raw material, blowing off water on the surface of the metal part raw material, and then putting the metal part raw material into a drying chamber for drying;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a release agent on the inner cavity of the casting mold, heating the casting mold to enable the temperature to reach 1600-1800 ℃, and preserving heat for 20-35 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting mold preheated in the step (3), heating to 1800-40 ℃ at the rate of raising the temperature per hour to 2200 ℃, preserving the heat at the temperature for 2-3h, then heating to 3000 ℃ at the rate of raising the temperature per hour to 20 ℃, preserving the heat at the temperature for 0.5-1.5h, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the condition of constant temperature, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.13-0.15Kpa, pressurizing the casting mold after pouring so as to solidify and supplement, and keeping the pressurizing state for 30-60min after the solidification and supplement;
(6) cooling the casting mold to 800-;
(7) and (4) grinding and polishing the casting obtained in the step (6) to obtain the required metal part.
Preferably, in the step (1), the water on the surface of the raw material of the metal part is blown off by means of compressed air.
Preferably, when the surface of the metal part raw material is dried in the step (1), the water content of the surface of the metal part raw material is less than 0.5 wt%.
Preferably, in the step (3), an aqueous release agent is used as the release agent.
Preferably, the pressure during the pressurization treatment in the step (5) is 300-600 Kpa.
Preferably, the time of the demolding treatment in the step (6) is 22-36 min.
Preferably, a mixture of steel grit and steel shot is used as the shot blasting abrasive in the step (7).
The invention has the beneficial effects that: compared with the prior art, the invention has the advantages that the raw materials of the metal parts are pretreated, the sectional heating casting mould is adopted, the defects of low surface quality and insufficient structural strength of the metal parts are overcome, the crystal grains of the metal parts are effectively improved by setting reasonable casting parameters, the mechanical property is improved, the functions of castings are ensured, and the use requirements of current customers are further met.
Detailed Description
The invention is further illustrated by the following examples:
a method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material with water, taking out the metal part raw material, blowing off water on the surface of the metal part raw material, and then putting the metal part raw material into a drying chamber for drying;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a release agent on the inner cavity of the casting mold, heating the casting mold to enable the temperature to reach 1600-1800 ℃, and preserving heat for 20-35 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting mold preheated in the step (3), heating to 1800-40 ℃ at the rate of raising the temperature per hour to 2200 ℃, preserving the heat at the temperature for 2-3h, then heating to 3000 ℃ at the rate of raising the temperature per hour to 20 ℃, preserving the heat at the temperature for 0.5-1.5h, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the condition of constant temperature, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.13-0.15Kpa, pressurizing the casting mold after pouring so as to solidify and supplement, and keeping the pressurizing state for 30-60min after the solidification and supplement;
(6) cooling the casting mold to 800-;
(7) and (4) grinding and polishing the casting obtained in the step (6) to obtain the required metal part.
Preferably, in the step (1), the water on the surface of the raw material of the metal part is blown off by means of compressed air.
Preferably, when the surface of the metal part raw material is dried in the step (1), the water content of the surface of the metal part raw material is less than 0.5 wt%.
Preferably, in the step (3), an aqueous release agent is used as the release agent.
Preferably, the pressure during the pressurization treatment in the step (5) is 300-600 Kpa.
Preferably, the time of the demolding treatment in the step (6) is 22-36 min.
Preferably, a mixture of steel grit and steel shot is used as the shot blasting abrasive in the step (7).
Example 1
A method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material, taking out the metal part raw material, blowing off water on the surface of the metal part raw material by adopting a compressed air mode, then putting the metal part raw material into a drying chamber for drying, and when drying the surface of the metal part raw material, ensuring that the water content on the surface of the metal part raw material is less than 0.5 wt%;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a water-based release agent on the inner cavity of the casting mold, heating the casting mold to enable the temperature to reach 1600 ℃, and preserving the heat for 35 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting die preheated in the step (3), heating to 1800 ℃ at the rate of raising the temperature by 40 ℃ per hour, preserving the heat for 3 hours at the temperature, then heating to 3000 ℃ at the rate of raising the temperature by 20 ℃ per hour, preserving the heat for 0.5 hour at the temperature, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the constant temperature condition, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.13Kpa, pressurizing the casting mold after pouring to enable the casting mold to be solidified and fed, wherein the pressure during pressurizing is 300Kpa, and keeping the pressurizing state for 60min after solidification and feeding;
(6) cooling the casting mold to 800 ℃, keeping the temperature constant for 1.5h, then cooling the casting mold to room temperature, and carrying out demolding treatment on the cast and molded metal part, wherein the demolding treatment time is 22min, so as to obtain a casting;
(7) and (4) grinding and polishing the casting obtained in the step (6), and taking a mixture of steel grit and steel shots as a shot blasting abrasive during polishing to obtain the required metal part.
Example 2
A method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material, taking out the metal part raw material, blowing off water on the surface of the metal part raw material by adopting a compressed air mode, then putting the metal part raw material into a drying chamber for drying, and when drying the surface of the metal part raw material, ensuring that the water content on the surface of the metal part raw material is less than 0.5 wt%;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a water-based release agent on the inner cavity of the casting mold, heating the casting mold to 1800 ℃, and preserving heat for 20 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting die preheated in the step (3), heating to 1800 ℃ at the rate of raising the temperature by 30 ℃ per hour, preserving the heat for 2 hours at the temperature, then heating to 3000 ℃ at the rate of raising the temperature by 20 ℃ per hour, preserving the heat for 1.5 hours at the temperature, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the constant temperature condition, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.15Kpa, pressurizing the casting mold after pouring to enable the casting mold to be solidified and fed, wherein the pressure during pressurizing is 600Kpa, and keeping the pressurizing state for 30min after solidification and feeding;
(6) cooling the casting mould to 900 ℃, keeping the temperature constant for 1h, then cooling the casting mould to room temperature, and carrying out demoulding treatment on the cast metal part, wherein the demoulding treatment time is 36min, so as to obtain a casting;
(7) and (4) grinding and polishing the casting obtained in the step (6), and taking a mixture of steel grit and steel shots as a shot blasting abrasive during polishing to obtain the required metal part.
Example 3
A method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material, taking out the metal part raw material, blowing off water on the surface of the metal part raw material by adopting a compressed air mode, then putting the metal part raw material into a drying chamber for drying, and when drying the surface of the metal part raw material, ensuring that the water content on the surface of the metal part raw material is less than 0.5 wt%;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a water-based release agent on the inner cavity of the casting mold, heating the casting mold to the temperature of 1700 ℃, and preserving the heat for 30 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting die preheated in the step (3), heating to 1900 ℃ at the rate of raising the temperature by 35 ℃ per hour, preserving the heat for 2.5 hours at the temperature, then heating to 3000 ℃ at the rate of raising the temperature by 20 ℃ per hour, preserving the heat for 1 hour at the temperature, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the constant temperature condition, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.14Kpa, pressurizing the casting mold after pouring to enable the casting mold to be solidified and fed, wherein the pressure during pressurizing is 400Kpa, and keeping the pressurizing state for 40min after solidification and feeding;
(6) cooling the casting mold to 850 ℃, keeping the temperature constant for 1.2h, then cooling the casting mold to room temperature, and carrying out demolding treatment on the cast and molded metal part, wherein the demolding treatment time is 28min, so as to obtain a casting;
(7) and (4) grinding and polishing the casting obtained in the step (6), and taking a mixture of steel grit and steel shots as a shot blasting abrasive during polishing to obtain the required metal part.
The invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various modifications, which may be made by the methods and technical solutions of the invention, or may be applied to other applications without modification.
Claims (7)
1. A method for casting a metal part, comprising the steps of:
(1) putting a metal part raw material to be cast into a degreasing agent solution, carrying out degreasing treatment, then washing the metal part raw material with water, taking out the metal part raw material, blowing off water on the surface of the metal part raw material, and then putting the metal part raw material into a drying chamber for drying;
(2) putting the metal part raw material dried in the step (1) into a crucible, vacuumizing, filling protective gas, and directly heating until the metal part raw material is melted;
(3) cleaning and drying the casting mold, uniformly coating a release agent on the inner cavity of the casting mold, heating the casting mold to enable the temperature to reach 1600-1800 ℃, and preserving heat for 20-35 min;
(4) injecting the raw material of the metal part melted in the step (2) into the casting mold preheated in the step (3), heating to 1800-40 ℃ at the rate of raising the temperature per hour to 2200 ℃, preserving the heat at the temperature for 2-3h, then heating to 3000 ℃ at the rate of raising the temperature per hour to 20 ℃, preserving the heat at the temperature for 0.5-1.5h, and obtaining a casting mold;
(5) vacuumizing the casting mold in the step (4) from a pouring gate under the condition of constant temperature, slowly pouring molten metal part raw materials into the casting mold when the vacuum degree is pumped to 0.13-0.15Kpa, pressurizing the casting mold after pouring so as to solidify and supplement, and keeping the pressurizing state for 30-60min after the solidification and supplement;
(6) cooling the casting mold to 800-;
(7) and (4) grinding and polishing the casting obtained in the step (6) to obtain the required metal part.
2. The method for casting a metal part according to claim 1, wherein the step (1) is performed by blowing water from the surface of the raw material of the metal part by means of compressed air.
3. The method of casting a metal part according to claim 1, wherein the surface of the raw material for the metal part is dried in the step (1) until the water content of the surface of the raw material for the metal part is less than 0.5 wt%.
4. The method of casting a metal part according to claim 1, wherein the release agent in the step (3) is an aqueous release agent.
5. The method for casting a metal part as recited in claim 1, wherein the pressurization treatment in the step (5) is carried out at a pressure of 300-600 Kpa.
6. The method of casting a metal part according to claim 1, wherein the time for the mold release treatment in the step (6) is 22 to 36 min.
7. The casting method of a metal part as recited in claim 1, wherein a mixture of steel grit and steel shot is used as the shot blasting abrasive in the polishing in the step (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411256.3A CN112658213A (en) | 2020-12-03 | 2020-12-03 | Casting method of metal part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011411256.3A CN112658213A (en) | 2020-12-03 | 2020-12-03 | Casting method of metal part |
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| CN112658213A true CN112658213A (en) | 2021-04-16 |
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Citations (7)
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| US8151865B1 (en) * | 2011-03-30 | 2012-04-10 | General Electric Company | Method and apparatus for casting filaments |
| CN107838636A (en) * | 2017-10-25 | 2018-03-27 | 镇江市益宝电气科技有限公司 | A kind of processing technology of valve |
| CN108015231A (en) * | 2017-12-19 | 2018-05-11 | 江西瑞冠精密铸造有限公司 | A kind of investment precision casting technology |
| CN108179324A (en) * | 2017-12-29 | 2018-06-19 | 重庆全茂合渝科技有限公司 | A kind of preparation method of clutch for motorcycle control stick |
| CN109243794A (en) * | 2017-11-16 | 2019-01-18 | 广州擎天实业有限公司 | A kind of cast type water cooling high frequency transformer shell mechanism and its manufacturing method |
| CN111534721A (en) * | 2020-05-21 | 2020-08-14 | 宿迁学院 | Co-Cr-Mo-N alloy and preparation method thereof |
| CN111842807A (en) * | 2019-04-28 | 2020-10-30 | 徐州众工精密模锻有限公司 | Casting method of planet carrier |
-
2020
- 2020-12-03 CN CN202011411256.3A patent/CN112658213A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8151865B1 (en) * | 2011-03-30 | 2012-04-10 | General Electric Company | Method and apparatus for casting filaments |
| CN107838636A (en) * | 2017-10-25 | 2018-03-27 | 镇江市益宝电气科技有限公司 | A kind of processing technology of valve |
| CN109243794A (en) * | 2017-11-16 | 2019-01-18 | 广州擎天实业有限公司 | A kind of cast type water cooling high frequency transformer shell mechanism and its manufacturing method |
| CN108015231A (en) * | 2017-12-19 | 2018-05-11 | 江西瑞冠精密铸造有限公司 | A kind of investment precision casting technology |
| CN108179324A (en) * | 2017-12-29 | 2018-06-19 | 重庆全茂合渝科技有限公司 | A kind of preparation method of clutch for motorcycle control stick |
| CN111842807A (en) * | 2019-04-28 | 2020-10-30 | 徐州众工精密模锻有限公司 | Casting method of planet carrier |
| CN111534721A (en) * | 2020-05-21 | 2020-08-14 | 宿迁学院 | Co-Cr-Mo-N alloy and preparation method thereof |
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Application publication date: 20210416 |