CN107971500B - Manufacturing method of magnesium alloy part and magnesium alloy part - Google Patents
Manufacturing method of magnesium alloy part and magnesium alloy part Download PDFInfo
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- CN107971500B CN107971500B CN201711247065.6A CN201711247065A CN107971500B CN 107971500 B CN107971500 B CN 107971500B CN 201711247065 A CN201711247065 A CN 201711247065A CN 107971500 B CN107971500 B CN 107971500B
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
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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
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
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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
- 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
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F2009/0804—Dispersion in or on liquid, other than with sieves
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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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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Abstract
The invention provides a manufacturing method of a magnesium alloy part and the magnesium alloy part, comprising the following steps: heating the magnesium alloy solution to a preset temperature; cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder; and processing and forming the magnesium alloy powder to obtain a magnesium alloy workpiece. Therefore, the magnesium alloy powder in a powder state can be quickly obtained, so that the time for processing the magnesium alloy powder is shortened, and the processing efficiency of magnesium alloy workpieces is greatly improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a manufacturing method of a magnesium alloy part and the magnesium alloy part.
Background
The magnesium alloy is an alloy formed by adding other elements on the basis of magnesium, and has the characteristics of high strength, large elastic modulus, good heat dissipation, good shock absorption, large impact load bearing capacity, good organic matter and alkali corrosion resistance and the like; therefore, the magnesium alloy is widely applied to the fields of automobiles, aviation, aerospace and the like, particularly the field of automobiles, and for example, the purpose of lightening the automobiles can be achieved by using a workpiece made of the magnesium alloy. However, the existing manufacturing method of magnesium alloy products usually adopts powder metallurgy process, which is relatively complex in process and strict in process requirement, thus the processing time is relatively long. Therefore, the processing time of the prior magnesium alloy product is longer.
Disclosure of Invention
The embodiment of the invention aims to provide a method for manufacturing a magnesium alloy part, which solves the problem of long processing time of the magnesium alloy part.
To achieve the above object, an embodiment of the present invention provides a method for manufacturing a magnesium alloy article, including:
heating the magnesium alloy solution to a preset temperature;
cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder;
and processing and forming the magnesium alloy powder to obtain a magnesium alloy workpiece.
Optionally, the magnesium alloy solution is cooled by a rapid cooling method to obtain magnesium alloy powder, which specifically includes:
and adding a rapid cooling agent into the closed container containing the magnesium alloy solution to cool the magnesium alloy solution.
Optionally, the flash coolant comprises liquid nitrogen.
Optionally, the preset temperature is greater than or equal to 648 ℃.
Optionally, in the method, when the magnesium alloy solution is cooled by using a rapid cooling method, the temperature of the cooled magnesium alloy solution is 15 to 20 ℃.
Optionally, the processing and molding treatment of the magnesium alloy powder is performed to obtain a magnesium alloy part, which specifically includes:
pressing the magnesium alloy powder to obtain a workpiece blank;
and processing the workpiece blank by a preset processing mode to obtain the magnesium alloy workpiece.
Optionally, the magnesium alloy powder is subjected to pressing treatment to obtain a workpiece blank, and the method specifically includes:
adding an active substance into the magnesium alloy powder, carrying out pressing treatment on the magnesium alloy powder, and fully mixing the magnesium alloy powder and the active substance in the pressing treatment process so as to enable the active substance to react with magnesium oxide on the surface of the magnesium alloy powder, thereby obtaining a part blank with the relative density of more than or equal to 95%.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a hot extrusion mode to obtain the magnesium alloy section.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a hot forging mode to obtain the magnesium alloy forging.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a drawing mode to obtain the magnesium alloy wire.
The embodiment of the invention also provides a magnesium alloy part, and the magnesium alloy part is manufactured by adopting the manufacturing method of the magnesium alloy part provided by the embodiment of the invention.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, the magnesium alloy solution is heated to a preset temperature; cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder; processing and molding the magnesium alloy powder to obtain a magnesium alloy workpiece; therefore, the magnesium alloy powder in a powder state can be quickly obtained, so that the time for processing the magnesium alloy powder is shortened, and the processing efficiency of magnesium alloy workpieces is greatly improved.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a magnesium alloy product according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a method for manufacturing a magnesium alloy product, including:
and S1, heating the magnesium alloy solution to a preset temperature.
The specific steps of heating the magnesium alloy solution to the preset temperature may be: and heating the magnesium alloy solution in the container by a heater until the temperature is heated to a preset temperature, and maintaining the temperature for a period of time. Wherein, the heater can be a stainless steel heater or a Teflon heater, etc.; the container may be a stainless steel container or a polypropylene container, etc. It should be noted that the magnesium alloy solution may be prepared in advance according to the needs of the user.
Optionally, the preset temperature is greater than or equal to 648 ℃; wherein 648 ℃ is the melting point of magnesium; thus, the magnesium alloy solution can be fully transformed into a liquid state by heating the magnesium alloy solution to a temperature of more than or equal to 648 ℃, thereby being beneficial to fully cooling the magnesium alloy solution in the subsequent process.
And S2, cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder.
The rapid cooling method is understood to be a method that can change the magnesium alloy solution from a higher temperature to a lower temperature in a very short time, for example, the magnesium alloy solution at 648 ℃ can be cooled by liquid nitrogen, and the magnesium alloy solution can be reduced from 648 ℃ to about 20 ℃ in several tens of seconds.
It should be noted that, when the magnesium alloy solution is cooled rapidly, i.e. the magnesium alloy solution is converted from a higher temperature to a lower temperature, the internal structure of the metal in the magnesium alloy solution changes, so that the metal is rapidly converted from a liquid state to a solid state and is broken into metal particles in a powder state, i.e. the magnesium alloy powder. The common powder preparation process usually adopts a mechanical grinding method, and the method has longer processing time, more working procedures and stricter requirements on the process.
Therefore, compared with the common powder preparation process, the method can save more processing time and processing cost and improve the production efficiency of the magnesium alloy powder.
Optionally, the magnesium alloy solution is cooled by a rapid cooling method to obtain magnesium alloy powder, which specifically includes: and adding a rapid cooling agent into the closed container containing the magnesium alloy solution to cool the magnesium alloy solution.
Wherein the quenching coolant is understood to be a coolant capable of causing the magnesium alloy solution to transition from a higher temperature to a lower temperature in a very short time. Thus, by adding a rapid coolant to the closed container containing the magnesium alloy solution, the cooling time of the magnesium alloy solution can be shortened, thereby improving the production efficiency of the magnesium alloy powder. Optionally, the flash coolant comprises liquid nitrogen; in this way, the magnesium alloy solution can be cooled by adding liquid nitrogen into the closed container containing the magnesium alloy solution, so that the cost can be reduced and the stability can be improved. The rapid cooling agent may be liquid hydrogen, liquid helium, liquid oxygen, or the like, and is not particularly limited so that the magnesium alloy solution can achieve the effect of rapid cooling.
Optionally, when the magnesium alloy solution is cooled by a rapid cooling method, the temperature of the cooled magnesium alloy solution is 15 to 20 ℃.
Wherein the temperature of the magnesium alloy solution after cooling is 15-20 ℃, which can be understood as normal temperature or room temperature; in this way, it may be advantageous to sufficiently cool the magnesium alloy solution so that the magnesium alloy solution is sufficiently converted into magnesium alloy powder. Of course, the temperature of the magnesium alloy solution after cooling may be other temperatures, such as: 25 degrees celsius. This is not particularly limited.
And S3, processing and forming the magnesium alloy powder to obtain a magnesium alloy product.
The specific steps of molding the magnesium alloy powder to obtain the magnesium alloy product can be as follows: the magnesium alloy powder is compacted into a compact with certain shape, size, density and strength by a powder forming process, and after the compact is obtained, the compact is sintered to obtain the required final physical and mechanical properties, namely the magnesium alloy product required by a user is obtained.
The powder forming process includes press forming and special forming; the sintering processing mode comprises hot extrusion, hot forging, drawing, casting and the like.
Optionally, the processing and molding treatment of the magnesium alloy powder is performed to obtain a magnesium alloy part, which specifically includes:
pressing the magnesium alloy powder to obtain a workpiece blank;
and processing the workpiece blank by a preset processing mode to obtain the magnesium alloy workpiece.
The pressing treatment may be understood as a pressing process among the aforementioned powder forming processes, and the most common pressing process is compression molding, i.e., a powder forming method using an applied pressure in a press mold. Therefore, the strength of the blank of the part can be higher by the compression molding mode.
The preset processing mode comprises a sintering processing mode, and can be hot extrusion, hot forging, drawing and casting. After the workpiece blank is processed by different preset processing modes, users can obtain various types of magnesium alloy workpieces which are required to be produced and manufactured. And the magnesium alloy part obtained by processing the part blank in a preset processing mode has the characteristics of uniform structure, no component segregation, fine crystal grains and high crystal grain activity, and in addition, the magnesium alloy part also has the characteristics of low density, high specific strength, high wear resistance and high corrosion resistance.
Optionally, the magnesium alloy powder is subjected to pressing treatment to obtain a workpiece blank, and the method specifically includes:
adding an active substance into the magnesium alloy powder, carrying out pressing treatment on the magnesium alloy powder, and fully mixing the magnesium alloy powder and the active substance in the pressing treatment process so as to enable the active substance to react with magnesium oxide on the surface of the magnesium alloy powder, thereby obtaining a part blank with the relative density of more than or equal to 95%.
Wherein the active substance comprises a reducing agent which can react with magnesium oxide on the surface of the magnesium alloy powder, and the reducing agent can be charcoal, coke, anthracite and other reducing agents. The ratio of the magnesium alloy powder to the active material is not limited. The mixing method includes mechanical method and chemical method, and usually mechanical method is adopted for mixing, for example, the powder can be mechanically blended and stirred by various mixers without chemical reaction, or vibration method can be also adopted, and the method is not limited in particular.
The active substance reacts with magnesium oxide on the surface of the magnesium alloy powder to obtain a workpiece blank with the relative density of more than or equal to 95%, and the problem that the powder pressing process is complex, pressing is difficult, smelting is weakened and the like is solved because a layer of compact oxide film naturally exists on the surface of the magnesium alloy powder, and after the active substance is added, the active substance can remove the layer of oxide film in a way of reacting with the magnesium oxide, so that the magnesium alloy in the magnesium alloy powder breaks through the blockage of the oxide film, and is pressed together, and the blank with the relative density of more than or equal to 95% can be obtained.
Thus, by adding the active substance, the oxide film on the surface of the magnesium alloy powder, which hinders the pressing, can be removed, so that the pressing process of the magnesium alloy powder can be more smooth, and the obtained blank has small density, high specific strength, high specific rigidity and large specific elastic modulus.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a hot extrusion mode to obtain the magnesium alloy section.
Therefore, the magnesium alloy section can be obtained in a short time, the structure of the magnesium alloy section is compact and uniform, the activity of crystal grains is high, and the load borne by the magnesium alloy section is improved.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a hot forging mode to obtain the magnesium alloy forging.
Therefore, the magnesium alloy forging has high fracture toughness, improved plasticity and higher strength.
Optionally, the workpiece blank is processed in a preset processing manner to obtain a magnesium alloy workpiece, and the method specifically includes:
and processing the workpiece blank in a drawing mode to obtain the magnesium alloy wire.
Therefore, the magnesium alloy wire rod can be accurate in shape and size, good in surface quality and higher in strength.
In the embodiment of the invention, the magnesium alloy solution is heated to a preset temperature; cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder; processing and molding the magnesium alloy powder to obtain a magnesium alloy workpiece; therefore, the magnesium alloy powder in a powder state can be quickly obtained, so that the time for processing the magnesium alloy powder is shortened, and the processing efficiency of magnesium alloy workpieces is greatly improved.
The embodiment of the invention also provides a magnesium alloy part, and the magnesium alloy part is manufactured by adopting the manufacturing method of the magnesium alloy part provided by the embodiment of the invention.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A method for manufacturing a magnesium alloy product is characterized by comprising the following steps:
heating the magnesium alloy solution to a preset temperature, wherein the preset temperature is greater than or equal to 648 ℃;
cooling the magnesium alloy solution by adopting a rapid cooling mode to obtain magnesium alloy powder, wherein the temperature of the cooled magnesium alloy solution is 15-20 ℃ when the magnesium alloy solution is cooled by adopting the rapid cooling mode;
processing and molding the magnesium alloy powder to obtain a magnesium alloy workpiece;
the processing and forming treatment of the magnesium alloy powder to obtain a magnesium alloy part specifically comprises the following steps:
pressing the magnesium alloy powder to obtain a workpiece blank;
processing the workpiece blank by a preset processing mode to obtain a magnesium alloy workpiece;
the magnesium alloy powder is pressed to obtain a workpiece blank, and the method specifically comprises the following steps:
adding an active substance into the magnesium alloy powder, carrying out pressing treatment on the magnesium alloy powder, and fully mixing the magnesium alloy powder and the active substance in the pressing treatment process to ensure that the active substance reacts with magnesium oxide on the surface of the magnesium alloy powder, wherein the active substance comprises a reducing agent which is charcoal, coke or anthracite.
2. The method according to claim 1, wherein the step of cooling the magnesium alloy solution by rapid cooling to obtain magnesium alloy powder comprises:
and adding a rapid cooling agent into the closed container containing the magnesium alloy solution to cool the magnesium alloy solution.
3. The method of claim 2, wherein the blast coolant comprises liquid nitrogen.
4. The method according to claim 1, wherein the processing of the workpiece blank by the predetermined processing manner to obtain the magnesium alloy workpiece specifically comprises:
and processing the workpiece blank in a hot extrusion mode to obtain the magnesium alloy section.
5. The method according to claim 1, wherein the processing of the workpiece blank by the predetermined processing manner to obtain the magnesium alloy workpiece specifically comprises:
and processing the workpiece blank in a hot forging mode to obtain the magnesium alloy forging.
6. The method according to claim 1, wherein the processing of the workpiece blank by the predetermined processing manner to obtain the magnesium alloy workpiece specifically comprises:
and processing the workpiece blank in a drawing mode to obtain the magnesium alloy wire.
7. A magnesium alloy article produced by the method of any one of claims 1 to 6.
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| CN107971500B true CN107971500B (en) | 2020-09-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59208046A (en) * | 1983-05-10 | 1984-11-26 | Toyota Motor Corp | Particle dispersed composite material and its production |
| CN1130114A (en) * | 1995-09-07 | 1996-09-04 | 上海申建冶金机电技术工程公司 | Method for preparing quickly solidifing hydrogen-stored alloy powder material |
| CN101925427A (en) * | 2008-01-23 | 2010-12-22 | 特拉迪姆有限公司 | Phlegmatized metal powder or alloy powder and method and reaction vessel for production thereof |
| CN102312144A (en) * | 2010-07-07 | 2012-01-11 | 乐普（北京）医疗器械股份有限公司 | Ultrafine-grain medical magnesium alloy and preparation method thereof |
| CN103212716A (en) * | 2013-04-23 | 2013-07-24 | 吴鋆 | Method of preparing metal zinc powder |
| CN104985189A (en) * | 2015-06-15 | 2015-10-21 | 临江镁业（集团）有限公司 | Preparation method for superfine magnesium alloy |
-
2017
- 2017-12-01 CN CN201711247065.6A patent/CN107971500B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59208046A (en) * | 1983-05-10 | 1984-11-26 | Toyota Motor Corp | Particle dispersed composite material and its production |
| CN1130114A (en) * | 1995-09-07 | 1996-09-04 | 上海申建冶金机电技术工程公司 | Method for preparing quickly solidifing hydrogen-stored alloy powder material |
| CN101925427A (en) * | 2008-01-23 | 2010-12-22 | 特拉迪姆有限公司 | Phlegmatized metal powder or alloy powder and method and reaction vessel for production thereof |
| CN102312144A (en) * | 2010-07-07 | 2012-01-11 | 乐普（北京）医疗器械股份有限公司 | Ultrafine-grain medical magnesium alloy and preparation method thereof |
| CN103212716A (en) * | 2013-04-23 | 2013-07-24 | 吴鋆 | Method of preparing metal zinc powder |
| CN104985189A (en) * | 2015-06-15 | 2015-10-21 | 临江镁业（集团）有限公司 | Preparation method for superfine magnesium alloy |
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