CN112517875A - Extrusion casting method for metal mold of aluminum alloy suspension clamp main body - Google Patents
Extrusion casting method for metal mold of aluminum alloy suspension clamp main body Download PDFInfo
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- CN112517875A CN112517875A CN202011450779.9A CN202011450779A CN112517875A CN 112517875 A CN112517875 A CN 112517875A CN 202011450779 A CN202011450779 A CN 202011450779A CN 112517875 A CN112517875 A CN 112517875A
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- China
- Prior art keywords
- suspension clamp
- aluminum alloy
- main body
- extrusion casting
- temperature
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Classifications
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2069—Exerting after-pressure on the moulding material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an extrusion casting method of a metal mold of an aluminum alloy suspension clamp main body, wherein the suspension clamp main body is made of EN AC-42100 aluminum alloy, and in the manufacturing process, the smelting stage is as follows: adding rare earth elements into the aluminum alloy for modification treatment, and adopting a method of preheating argon and degassing for multiple times at short intervals; and (3) extrusion casting stage: an inclined fluid director is additionally arranged, and secondary extrusion casting is adopted; and (3) a heat treatment stage: a step heating method and a long-term dynamic water quenching method are adopted. Compared with the prior art, the invention has the advantages that: the method has the advantages of excellent mechanical property, near-net processing, material saving, high production efficiency, good surface quality, lower comprehensive cost than other aluminum alloy suspension clamp processing methods, high cost performance, obvious competitive advantage and suitability for wide popularization and application.
Description
Technical Field
The invention relates to the field of manufacturing of suspension clamps of power transmission lines of power systems, in particular to a metal mold extrusion casting method for an aluminum alloy suspension clamp main body.
Background
With the development of electric power utilities in China, the transmission line engineering is increased year by year, and the demand for transmission line hardware fittings is huge. In the existing transmission line, the suspension clamp made of aluminum alloy is light in weight and free of hysteresis eddy current loss, and the requirements of power operation departments such as national grid companies and the like on the aluminum alloy suspension clamp are higher and higher in recent years.
Aiming at the above situation analysis, the gravity casting processing method of the aluminum alloy suspension clamp has the problems of low mechanical property and heavy weight of the product; the low-pressure casting processing method of the aluminum alloy suspension clamp has the problems of low production efficiency and high production cost; the forging processing method of the aluminum alloy suspension clamp has the problems of multiple production processes, high energy consumption, low material utilization rate and high production cost. The problems of the various processing methods make the market competition of the aluminum alloy suspension clamp more fierce, and how to develop a processing method with better cost performance ratio, improve the market competition of enterprise products, save materials and energy, and are very important.
Disclosure of Invention
The invention aims to solve the technical problems and provides a metal mold extrusion casting method for an aluminum alloy suspension clamp main body.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a metal mold extrusion casting method of an aluminum alloy suspension clamp main body comprises an alloy suspension clamp, the main body material of the alloy suspension clamp is ENAC-42100 aluminum alloy, and the extrusion casting method comprises a smelting stage, an extrusion casting stage and a heat treatment;
the smelting stage comprises the following steps:
a1: preheating a smelting furnace, wherein the smelting furnace is dry and has no moisture;
a2: adding ENAC-42100 aluminum alloy, and deslagging at a smelting temperature of 745 ℃;
a3: carrying out first argon refining at the smelting temperature of 740 ℃, wherein each argon refining is preheated argon instead of cold argon;
a4: modifying at the smelting temperature of 745 ℃, and adding trace rare earth elements;
a5: carrying out secondary argon refining at the smelting temperature of 740 ℃;
a6: standing for 15 minutes;
a7: the pouring temperature is 690 and 710 ℃, and the pouring is finished within 30 minutes;
the squeeze casting stage comprises the following steps:
b1: adopting a metal mold extrusion casting processing technology, wherein the processing equipment is a 630T vertical extrusion casting machine, and a suspension wire clamp main body mold is arranged on the vertical extrusion casting machine;
b2: 690-710 ℃ liquid aluminum alloy is poured into the inclined flow guider;
b3: the semi-solid aluminum alloy cooled by the inclined fluid director enters the charging barrel;
b4: performing primary low-speed mold filling on a metal mold of the suspension clamp main body at a specific pressure of 1000kgf/cm 2;
b5: after the primary pressurizing and filling is finished, secondary pressurizing is carried out on the metal mould of the suspension clamp main body at the specific pressure of 900kgf/cm2, the pressure is maintained for 30s, and the mould is opened to take out the product;
the heat treatment comprises the following steps:
c1: heating the extrusion casting part of the suspension clamp main body to 300 ℃ in a furnace, and keeping the temperature for 30 min;
c2: continuously heating to 400 ℃, and keeping the temperature for 30 min;
c3: continuously heating to 500 ℃, and keeping the temperature for 1 h;
c4: after the heat preservation is finished, raising the temperature to 535 +/-5 ℃ for solid solution for 6 hours;
c5: after the solid solution is finished, rapidly closing a fan and opening a furnace door at the temperature of more than 535 +/-DEG C, rapidly introducing water into the product along with a hanging basket, and quenching the product for 10min by adopting dynamic water and shaking a water tank or flowing water at the temperature of about 60 ℃;
c6: after water quenching, airing the suspension clamp main body extrusion casting;
c7: putting the dried suspension clamp main body extrusion casting piece into an aging holding furnace, and aging at 150 ℃ for 6 hours;
c8: and taking out the extrusion casting part of the suspension clamp main body and then carrying out shot blasting subsequent surface treatment.
Furthermore, the rare earth elements added in the A4 in the smelting stage are La and Nd.
Further, in the smelting stage, if the casting can not be completed within 30 minutes in A7, argon refining is continued, and argon refining can be performed once within 30 minutes along with the time extension.
Compared with the prior art, the invention has the advantages that: compared with the product processed by the metal mold gravity casting process, the aluminum alloy suspension clamp processed by the metal mold extrusion casting process has the advantages that the surface quality is superior to that of a gravity casting suspension clamp, the material is saved by 40 percent, the mechanical property is good and reaches 300MPa, and the aluminum alloy suspension clamp is close to that of a forged suspension clamp; compared with a low-pressure casting process processed product, the surface quality is superior to that of a low-pressure casting suspension clamp, the production efficiency is high, and the process yield is high; compared with a product processed by a forging process, the method has the advantages of high production efficiency, few production procedures, near-net processing, no flash and burr, no need of a burr-cutting die, high material utilization rate, good surface quality and low comprehensive cost.
The method has the advantages of excellent mechanical property, near-net processing, material saving, high production efficiency, good surface quality, lower comprehensive cost than other aluminum alloy suspension clamp processing methods, high cost performance, obvious competitive advantage and suitability for wide popularization and application.
Detailed Description
A metal mold extrusion casting method of an aluminum alloy suspension clamp main body comprises an alloy suspension clamp, the main body material of the alloy suspension clamp is ENAC-42100 aluminum alloy, and the extrusion casting method comprises a smelting stage, an extrusion casting stage and a heat treatment;
the smelting stage comprises the following steps:
a1: preheating a smelting furnace, wherein the smelting furnace is dry and has no moisture;
a2: adding ENAC-42100 aluminum alloy, and deslagging at a smelting temperature of 745 ℃;
a3: carrying out first argon refining at the smelting temperature of 740 ℃, wherein each argon refining is preheated argon instead of cold argon;
a4: modifying at the smelting temperature of 745 ℃, and adding trace rare earth elements;
a5: carrying out secondary argon refining at the smelting temperature of 740 ℃;
a6: standing for 15 minutes;
a7: the pouring temperature is 690 and 710 ℃, and the pouring is finished within 30 minutes;
the squeeze casting stage comprises the following steps:
b1: adopting a metal mold extrusion casting processing technology, wherein the processing equipment is a 630T vertical extrusion casting machine, and a suspension wire clamp main body mold is arranged on the vertical extrusion casting machine;
b2: 690-710 ℃ liquid aluminum alloy is poured into the inclined flow guider;
b3: the semi-solid aluminum alloy cooled by the inclined fluid director enters the charging barrel;
b4: performing primary low-speed mold filling on a metal mold of the suspension clamp main body at a specific pressure of 1000kgf/cm 2;
b5: after the primary pressurizing and filling is finished, secondary pressurizing is carried out on the metal mould of the suspension clamp main body at the specific pressure of 900kgf/cm2, the pressure is maintained for 30s, and the mould is opened to take out the product;
the heat treatment comprises the following steps:
c1: heating the extrusion casting part of the suspension clamp main body to 300 ℃ in a furnace, and keeping the temperature for 30 min;
c2: continuously heating to 400 ℃, and keeping the temperature for 30 min;
c3: continuously heating to 500 ℃, and keeping the temperature for 1 h;
c4: after the heat preservation is finished, raising the temperature to 535 +/-5 ℃ for solid solution for 6 hours;
c5: after the solid solution is finished, rapidly closing a fan and opening a furnace door at the temperature of more than 535 +/-DEG C, rapidly introducing water into the product along with a hanging basket, and quenching the product for 10min by adopting dynamic water and shaking a water tank or flowing water at the temperature of about 60 ℃;
c6: after water quenching, airing the suspension clamp main body extrusion casting;
c7: putting the dried suspension clamp main body extrusion casting piece into an aging holding furnace, and aging at 150 ℃ for 6 hours;
c8: and taking out the extrusion casting part of the suspension clamp main body and then carrying out shot blasting subsequent surface treatment.
The rare earth elements added in A4 in the smelting stage are La and Nd.
And in the smelting stage, if the casting can not be completed within 30 minutes in A7, argon refining is continuously carried out, and argon refining can be carried out once within 30 minutes along with the time extension.
The working principle of the invention is as follows: the main body material of the suspension clamp is EN AC-42100 aluminum alloy, and in the manufacturing process, the smelting stage is as follows: adding rare earth elements into the aluminum alloy for modification treatment, and adopting a method of preheating argon and degassing for multiple times at short intervals; and (3) extrusion casting stage: an inclined fluid director is additionally arranged, and secondary extrusion casting is adopted; and (3) a heat treatment stage: a step heating method and a long-term dynamic water quenching method are adopted.
The present invention and the embodiments thereof have been described above without limitation, and it is within the scope of the present invention that those skilled in the art should be able to devise similar structural modes and embodiments without inventive changes without departing from the spirit and scope of the present invention.
Claims (3)
1. The extrusion casting method of the metal mold of the aluminum alloy suspension clamp main body comprises an alloy suspension clamp, the main body material of the alloy suspension clamp is ENAC-42100 aluminum alloy, the extrusion casting method comprises a smelting stage, an extrusion casting stage and a heat treatment, and is characterized in that:
the smelting stage comprises the following steps:
a1: preheating a smelting furnace, wherein the smelting furnace is dry and has no moisture;
a2: adding ENAC-42100 aluminum alloy, and deslagging at a smelting temperature of 745 ℃;
a3: carrying out first argon refining at the smelting temperature of 740 ℃, wherein each argon refining is preheated argon instead of cold argon;
a4: modifying at the smelting temperature of 745 ℃, and adding trace rare earth elements;
a5: carrying out secondary argon refining at the smelting temperature of 740 ℃;
a6: standing for 15 minutes;
a7: the pouring temperature is 690 and 710 ℃, and the pouring is finished within 30 minutes;
the squeeze casting stage comprises the following steps:
b1: adopting a metal mold extrusion casting processing technology, wherein the processing equipment is a 630T vertical extrusion casting machine, and a suspension wire clamp main body mold is arranged on the vertical extrusion casting machine;
b2: 690-710 ℃ liquid aluminum alloy is poured into the inclined flow guider;
b3: the semi-solid aluminum alloy cooled by the inclined fluid director enters the charging barrel;
b4: performing primary low-speed mold filling on a metal mold of the suspension clamp main body at a specific pressure of 1000kgf/cm 2;
b5: after the primary pressurizing and filling is finished, secondary pressurizing is carried out on the metal mould of the suspension clamp main body at the specific pressure of 900kgf/cm2, the pressure is maintained for 30s, and the mould is opened to take out the product;
the heat treatment comprises the following steps:
c1: heating the extrusion casting part of the suspension clamp main body to 300 ℃ in a furnace, and keeping the temperature for 30 min;
c2: continuously heating to 400 ℃, and keeping the temperature for 30 min;
c3: continuously heating to 500 ℃, and keeping the temperature for 1 h;
c4: after the heat preservation is finished, raising the temperature to 535 +/-5 ℃ for solid solution for 6 hours;
c5: after the solid solution is finished, rapidly closing a fan and opening a furnace door at the temperature of more than 535 +/-DEG C, rapidly introducing water into the product along with a hanging basket, and quenching the product for 10min by adopting dynamic water and shaking a water tank or flowing water at the temperature of about 60 ℃;
c6: after water quenching, airing the suspension clamp main body extrusion casting;
c7: putting the dried suspension clamp main body extrusion casting piece into an aging holding furnace, and aging at 150 ℃ for 6 hours;
c8: and taking out the extrusion casting part of the suspension clamp main body and then carrying out shot blasting subsequent surface treatment.
2. The method of claim 1, wherein the aluminum alloy suspension clamp body is formed by die-casting, in which: the rare earth elements added in A4 in the smelting stage are La and Nd.
3. The method of claim 1, wherein the aluminum alloy suspension clamp body is formed by die-casting, in which: and in the smelting stage, if the casting can not be completed within 30 minutes in A7, argon refining is continuously carried out, and argon refining can be carried out once within 30 minutes along with the time extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011450779.9A CN112517875A (en) | 2020-12-10 | 2020-12-10 | Extrusion casting method for metal mold of aluminum alloy suspension clamp main body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011450779.9A CN112517875A (en) | 2020-12-10 | 2020-12-10 | Extrusion casting method for metal mold of aluminum alloy suspension clamp main body |
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| CN112517875A true CN112517875A (en) | 2021-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118308618A (en) * | 2024-06-07 | 2024-07-09 | 中北大学 | Particle reinforced aluminum-based composite material reflector and preparation method thereof |
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| CN101152665A (en) * | 2006-09-30 | 2008-04-02 | 宁波拓普隔音系统有限公司 | Aluminum alloy precast-forging forming technique and mold thereof |
| CN102861904A (en) * | 2012-09-19 | 2013-01-09 | 江苏华威线路设备集团有限公司 | Special molding machining method of positioning support body |
| CN103515905A (en) * | 2012-06-21 | 2014-01-15 | 上海永固电力器材有限公司 | Double-arranged suspension clamp for lines |
| KR101585874B1 (en) * | 2015-08-28 | 2016-01-15 | (주)일양금속 | Manufacturing Method of Wedge Type Tension Clamp |
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| CN109897994A (en) * | 2019-04-19 | 2019-06-18 | 深圳市拜尔克科技有限公司 | Cast aluminium alloy gold and its casting technique are processed in liquid forging |
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2020
- 2020-12-10 CN CN202011450779.9A patent/CN112517875A/en active Pending
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| CN105680393A (en) * | 2014-11-16 | 2016-06-15 | 江苏天南电力器材有限公司 | Extra-high voltage suspension clamp and production technology and equipment thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118308618A (en) * | 2024-06-07 | 2024-07-09 | 中北大学 | Particle reinforced aluminum-based composite material reflector and preparation method thereof |
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