WO2014186919A1

WO2014186919A1 - High-hardness aluminum alloy ingot and production method thereof

Info

Publication number: WO2014186919A1
Application number: PCT/CN2013/000893
Authority: WO
Inventors: 黄崇胜
Original assignee: 怡球金属资源再生（中国）股份有限公司
Priority date: 2013-05-24
Filing date: 2013-07-26
Publication date: 2014-11-27
Also published as: CN103243246A

Abstract

A high-hardness aluminum alloy ingot and a production method thereof. The high-hardness aluminum alloy ingot consists of the following components in percentage by weight: 2.0-3.0% of Cu, 9.5-11.5% of Si, 0-0.1% of Mg, 0-2.9% of Zn, 0.6-1.0% of Fe, 0-0.5% of Mn, 0-0.3% of Ni, 0-0.15% of Sn, and the balance of Al. The high-hardness aluminum alloy ingot and the production method thereof provided have the advantages of low production and labor intensity, low cost, high efficiency, excellent mechanical properties and processability, high alloy hardness, ultralow gas and slag contents, high melt cleanliness, stable and homogeneous alloy composition, small composition segregation, fine crystal structure of the product, no coarse, brittle and hard phase, uniform distribution of silicon, iron and compounds thereof in an aluminum substrate, and good thermal resistance of the product.

Description

TECHNICAL FIELD The present invention relates to an aluminum alloy ingot and a production method thereof, and in particular to a high-quality high-hardness aluminum alloy ingot and a production method thereof. Background Art At present, aluminum-silicon alloys on the market have high impurity content and gas content, severe segregation of components, poor mechanical and processing properties, poor sorting ability of raw materials, high preparation cost, and low efficiency.

In addition, there are two methods for preparing high-quality high-hardness aluminum alloy ingots on the market. One is to use pure aluminum ingot as the matrix, according to the distribution ratio requirement, adding the required alloying elements, and melting the aluminum alloy ingots with the required grades. However, the preparation method is costly; the other preparation method is prepared by using waste aluminum material, and the waste aluminum parts recovered or the scraps in the process of producing aluminum products and the waste aluminum wire are used as main raw materials, and are prepared by melting. Producing recycled aluminum ingots that meet the requirements of the standard, this production method has the following problems:

1) Source of waste aluminum material and its pretreatment

The waste aluminum material is mainly divided into waste aluminum slice, mixed waste aluminum material, incinerated aluminum-containing aluminum material, waste aluminum, waste aluminum and waste alloy aluminum. The waste aluminum material mainly comes from industrial waste, recycled materials, and casting and pouring system, and its composition is relatively complicated. In most cases, it contains a lot of foreign impurities, including various organic substances such as plastics, moisture, etc., if these materials are not cleaned before the smelting process, the alloy melt will be seriously inhaled, followed by solidification. Defects such as porosity, porosity, etc. occur during the process. Therefore, the waste aluminum material should be pretreated before smelting. The pretreatment of the waste aluminum material in the industry is classified according to the material composition. The classification is based on the composition of the aluminum alloy of a certain grade. The waste is dismantled as necessary to remove large pieces of non-aluminum metal or organic impurities. Perform necessary cleaning, sand blasting, etc. on raw materials. At present, the pretreatment of waste aluminum in the industry has not yet achieved mechanization and automation, mainly relying on labor and labor. It is a magnet and a steel shovel. It is based on experience. This sorting method is low in efficiency, poor in quality, and high in cost.

2) Smelting of high quality and high hardness aluminum alloy ingot

The basic process of smelting is to put a certain amount of metal charge into the furnace, heat and melt to obtain the melt, then adjust the composition of the molten melt, and take corresponding measures to control the gas and oxidized inclusions during the smelting process. The content is such that it meets the specified composition and the desired high quality alloy liquid is obtained.

The process of melting aluminum alloy is as follows: Prepare one ingredient, one furnace, one furnace, one melting (add silicon, copper, etc.) → slag one plus (except) magnesium, strontium, etc. One stirring, one sampling, one adjusting component, one stirring, one refining, one slag, one static Set a casting.

At present, the high-temperature melting method is generally used in the industry, and the temperature is controlled at about 800 °C during the smelting process. This smelting has a large burning loss on the raw materials and consumes a large amount of energy; the stirring in the smelting process is generally carried out by stirring with iron shovel and stirring with iron shovel. Will increase the iron content of the aluminum melt, and at the same time increase the gas containing slag content of the melt; refining process is not mature, generally the refining agent is directly sprinkled into the furnace, degassing, impurity removal effect is not good. At the same time, the pollution control in the production process is not good, which seriously affects the environmental quality.

In summary, the technical problems encountered in the preparation of high-quality and high-hardness aluminum alloy ingots using waste aluminum materials are: pretreatment quality of waste aluminum materials, energy consumption during smelting process, control of burning loss, uniformity of product composition Guarantee, quality of purification of aluminum melt, control of crystal structure of products, control of gas content of products and control of slag content, etc. Due to the above technical problems, there are high costs in production, coarse product crystals, serious segregation of components, and high impurity content. High gas content, low strength, unstable mechanical properties, and serious environmental pollution. Summary of the invention

In order to solve the above technical problems, an object of the present invention is to provide a high-quality high-hardness aluminum alloy ingot, and a production method of the high-hardness aluminum alloy ingot.

In order to achieve the above object, the technical solution provided by the present invention is:

A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.0% to 3.0%; Si: 9.5% to 11.5%; Mg: 0 to 0.1%; Zn: 0 to 2.9%; Fe: 0.6 to 1.0%; Mn: 0 to 0.5%; Ni: 0 to 0.3%; Sn: 0 to 0.15%; balance: Al. The above-mentioned production method of high-quality high-hardness aluminum alloy ingot includes the following steps:

(1) Sorting and sorting of waste aluminum materials: Sorting waste aluminum materials by size and storing them in different sizes according to size;

(2) Ingredients: Cu: 2.0%~3.0% by weight, Si: 9.5%~11.5%, Mg: 0~0.1%, Zn: 0~2.9%, Fe: 0.6-1.0%, Mn: 0~ 0.5%, Ni: 0~0.3%, Sn: 0~0.15%, the remainder is taken from the waste aluminum material of the same or adjacent size of the selected ones of the first step (1) to obtain the starting material;

(3) One-time feeding: taking 55%-70% of the mass of each raw material in the initial raw material, pre-heated to 170 °C-300 °C in the preheating kiln, and then sent to the melting furnace;

(4) further heating the smelting furnace to 650 ° C - 730 ° C, smelting 2 h _ 3 h, the bottom of the smelting furnace is provided with a permanent magnet stirrer, and the permanent magnet stirrer is turned on during the smelting process for stirring;

(5) slag: slag treatment of oxidized slag floating on the surface of the smelting liquid;

(6) Initial sampling test: taking the molten liquid, analyzing the content of each component, and comparing with the components in claim 1;

(7) Secondary feeding: According to the comparison result of step (6), the remaining components of the initial raw materials are adjusted, and then placed in a preheating kiln to be preheated to 170 ° C-30 (after TC, supplemented In the melting furnace, the melting furnace is heated again, the melting furnace is heated to 650 ° C - 730 ° C, and smelted for 3 h - 5 h to make the secondary feed material into a molten state;

(8) slag: slag treatment of oxidized slag floating on the surface of the smelting liquid;

(9) Converter: moving the smelting liquid from the smelting furnace to the refining furnace, performing a second sampling and detecting operation, taking the smelting liquid, analyzing the content of each component, and comparing with the components of claim 1, the refining A permanent magnet stirrer is arranged at the bottom of the furnace, and a permanent magnet stirrer is turned on during the refining process for stirring;

(10) Feeding: According to the comparison result of step (9), it is judged that the content of copper and silicon is enough to reach the content of copper and silicon in claim 1, and if not, copper and silicon are added according to the test results. ;

(11) Melting furnace melting: Control temperature is 720 ° C-74 (TC, melting silicon and copper added, And performing a third sampling test on the molten liquid, taking the molten liquid, analyzing the content of each component, and comparing with the components in claim 1;

(12) Adjusting the composition: If the comparison result is inconsistent with the content of the component in claim 1, the feeding or dilution is carried out until the content of each component is consistent with the content of the component in claim 1;

(13) Refining and degassing: The temperature of the aluminum liquid is adjusted to 680~710 °C for refining and degassing, and the degassing time is 30~50 minutes;

(14) slag: remove scum floating on the surface of aluminum after refining and degassing;

(15) Stand still: Allow to stand for 30~40 minutes;

(16) Sampling test: Sampling and testing of the molten liquid, confirming that the content of each component is consistent with the content of the components in claim 1;

(17) On-line degassing: a nitrogen gas having a purity of not less than 99.99% is again introduced into the molten liquid for on-line degassing;

(18) Casting: Casting the product into an aluminum alloy ingot that meets the storage and transportation requirements. Further, the refining and degassing is specifically: placing the powdered refining agent in the dusting can, and blowing the powder refining agent into the molten liquid with nitrogen having a purity of not less than 99.99%, in the impurity refining At the same time degassing.

Preferably, the powdered refining agent is blown into the molten liquid through the reinforced hose and the iron pipe.

Preferably, the on-line degassing uses a T-type ceramic degassing tube to pass nitrogen gas. Preferably, the waste aluminum material is sorted by size using a smelting scrap sorting iron remover and a dosing trolley.

Further, the step (8) and the step (9) further comprise a step (8') subsampling detection: taking the molten liquid, analyzing the content of each component by using an optical spectrum analyzer, and the claims The components in 1 are aligned.

Preferably, the sampling detection uses a spectrum analyzer to analyze the content of each component.

Preferably, the feeding is carried out using an aluminum smelting automatic feeding system.

With the above technical solutions, the beneficial effects of the present invention are as follows: The invention adopts the sorting iron removing machine and the materializing trolley to realize the size sorting and storage of the waste aluminum material, and is used according to the size, the sorting efficiency is high, the obtained scrap aluminum material has good quality, and the sorting processing cost is also low. .

The smelting temperature used in the invention is low, the burning loss of the raw material is small, the energy consumption is small, and the permanent magnet stirring is used in the smelting process, thereby avoiding the defect of increasing the iron content of the alloy caused by the traditional shovel stirring, and the stirring is uniform, the magnetic field rotating power The generated aluminum liquid vortex can make the chemical composition in the aluminum liquid uniform and improve the crystal quality of the alloy; the melt chemical composition after stirring is uniform, no secondary pollution, small segregation and the like. The method of using the refining agent is adopted, the degassing effect is good, and the environmental pollution of the refining agent is avoided. During the smelting process, the content of the component is detected multiple times to ensure the stability of the component content, the product crystallization is good, the impurity content is low, the gas content is low, the strength is high, and the mechanical properties are stable. BEST MODE FOR CARRYING OUT THE INVENTION In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be described in detail below with reference to the embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.0%; Si: 11.45%; Mg: 0.1%; Zn: 2.9%; Fe: 1.0%; Mn: 0.45%; Ni: 0.23%; Sn: 0.12%; balance is Al.

The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(1) Sorting and sorting of waste aluminum materials: The scrap aluminum materials are sorted by size by using the smelting waste material sorting iron remover and the materializing trolley, and are stored in different sizes according to the size;

(2) Ingredients: Cu: 2.0% by weight; Si: 11.45%; Mg: 0.1%; Zn: 2.9%; Fe: 1.0%; Mn: 0.45%; Ni: 0.23%; Sn: 0.12%, Taking the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

(4) further heating the melting furnace to 650 ° C - 730 ° C, smelting 2h_3h, the bottom of the melting furnace is provided with a permanent magnet stirrer, and the permanent magnet stirrer is turned on during the melting process for stirring; (5) slag: slag treatment of oxidized slag floating on the surface of the smelting liquid;

(8 ') Subsampling test: The smelting liquid is taken, and the content of each component is analyzed by an optical spectrum analyzer and compared with the components of claim 1.

(11) Melting furnace melting: Control the temperature at 720 ° C-74 (TC, melt the silicon and copper added, and carry out the third sampling test of the melt, take the molten liquid, analyze the content of each component, and with the right The components in claim 1 are aligned;

(13) Refining and degassing: The temperature of the aluminum liquid is adjusted to 680~710 °C for refining and degassing. The refining degassing time is 30~50 minutes, specifically: placing the powder refining agent in the dusting can, using purity Not less than 99.99% of the nitrogen is blown into the molten liquid through the reinforced hose and the iron pipe, and degassed while removing the refining;

(14) slag: remove scum floating on the surface of aluminum after refining and degassing; (15) Stand still: Allow to stand for 30~40 minutes;

(17) On-line degassing: The T-type ceramic degassing pipe is used to pass the nitrogen gas with a purity of not less than 99.99% to the molten liquid for on-line degassing;

(18) Casting: Casting the product into an aluminum alloy ingot that meets the storage and transportation requirements.

Example 2 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 3.0%; Si: 10.8%; Mg: 0.5%; Zn: 2.5%; Fe: 0.6%; Mn: 0.25%; Ni: 0.01%; Sn: 0.15%; balance is Al.

(1) Sorting and sorting of waste aluminum materials: The scrap aluminum materials are sorted by size according to the smelting waste material sorting iron remover and the materializing trolley, and stored in different sizes according to the size;

(2) Ingredients: Cu: 3.0% by weight; Si: 10.8%; Mg: 0.5%; Zn: 2.5%; Fe: 0.6%; Mn: 0.25%; Ni: 0.01%; Sn: 0.15%, Measure the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the starting material;

(6) Initial sampling test: taking the molten liquid, analyzing the content of each component, and comparing it with the components in claim 1;

(7) Secondary feeding: According to the comparison result of the step (6), the remaining components of the initial raw materials are adjusted, and then placed in a preheating kiln to be preheated to 170 ° C-30 (after TC, supplemented In the melting furnace, the melting furnace is heated again, the melting furnace is heated to 650 ° C - 730 ° C, and smelted for 3 h - 5 h to make the secondary feed material into a molten state; (8) slag: slag treatment of oxidized slag floating on the surface of the smelting liquid;

(9) Converter: The smelting liquid is transferred from the smelting furnace to the refining furnace, and a second sampling and detecting operation is performed, the smelting liquid is taken, the content of each component is analyzed, and compared with the components of claim 1, the refining A permanent magnet stirrer is arranged at the bottom of the furnace, and a permanent magnet stirrer is turned on during the refining process for stirring;

(13) Refining and degassing: The temperature of the aluminum liquid is adjusted to 680~710 °C for refining and degassing, and the degassing time for refining is 30~50 minutes, specifically: placing the powder refining agent in the dusting can, using purity Not less than 99.99% of the nitrogen is blown into the molten liquid through the reinforced hose and the iron pipe, and degassed while removing the refining;

(15) Stand still: Allow to stand for 30~40 minutes;

(17) On-line degassing: using a T-type ceramic degassing tube to pass a nitrogen gas with a purity of not less than 99.99% to the molten liquid for on-line degassing;

Example 3 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.5 %; Si: 9.5%; Mg: 0.06%; Zn: 1.8%; Fe: 0.6%; Mn: 0.45%; Ni: 0.3%; Sn: 0.05%; balance is Al.

(2) Ingredients: Percentage by weight: Cu: 2.5 %; Si: 9.5%; Mg: 0.06%; Zn: 1.8%; Fe: 0.6%; Mn: 0.45%; Ni: 0.3%; Sn: 0.05%, Balance

(1) Sorting the waste aluminum materials of the same or adjacent size cargo to obtain the starting materials;

(9) Converter: moving the smelting liquid from the smelting furnace to the refining furnace, performing a second sampling and detecting operation, taking the smelting liquid, analyzing the content of each component, and comparing with the components of claim 1, the refining A permanent magnet stirrer is arranged at the bottom of the furnace, and a permanent magnet stirrer is turned on during the refining process for stirring; (10) Feeding: According to the comparison result of step (9), it is judged that the content of copper and silicon is enough to reach the content of copper and silicon in claim 1, and if not, copper and silicon are added according to the test results. ;

(11) Melting furnace melting: Control the temperature at 720 ° C-74 (TC, melt the silicon and copper added, and conduct a third sampling test on the melt, take the molten liquid, analyze the content of each component, and with the right The components in claim 1 are aligned;

(13) Refining and degassing: The temperature of the aluminum liquid is adjusted to 680~710 °C for refining and degassing, and the degassing time for refining is 30~50 minutes, specifically: placing the powder refining agent in the dusting can, using purity Nitrogen gas of not less than 99.99% is used to blow the powdered refining agent into the molten liquid through the reinforced hose and the iron pipe, and degassing while removing the refining;

(15) Stand still: Allow to stand for 30~40 minutes;

Example 4 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.4%; Si: 9.7%; Mg: 0.02%; Zn: 2.2%; Fe: 0.7%; Mn: 0.15%; Ni: 0.08%; Sn: 0.08%; balance is Al. The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(2) Ingredients: Take by weight: Cu: 2.4%; Si: 9.7%; Mg: 0.02%; Zn: 2.2%; Fe: 0.7%; Mn: 0.15%; Ni: 0.08%; Sn: 0.08%, the balance is taken from the waste aluminum of the same or adjacent size of the selected one (1) Starting material

(8 ') Subsampling test: The molten liquid is taken, and the content of each component is analyzed by an optical spectrum analyzer and compared with the components of claim 1.

(12) Adjusting the composition: If the comparison result is inconsistent with the content of the component in claim 1, Feeding or diluting until the content of each component is consistent with the content of the components of claim 1;

(15) Stand still: Allow to stand for 30~40 minutes;

Example 5 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.8%; Si: 10.2%; Mg: 0.08%; Zn: 1.8%; Fe: 0.6%; Mn: 0.5%; Ni: 0.23%; Sn: 0.05%; balance is Al. The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(2) Ingredients: Cu: 2.8% by weight; Si: 10.2%; Mg: 0.08%; Zn: 1.8%; Fe: 0.6%; Mn: 0.5%; Ni: 0.23%; Sn: 0.05%, Measuring step

Example 6

A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.6 %; Si: 10.6%; Mg: 0.03%; Zn: 2.2%; Fe: 0.7%; Mn: 0.15%; Ni: 0.08%; Sn: 0.08%; the balance is Al.

(2) Ingredients: Cu: 2.6 % by weight; Si: 10.6%; Mg: 0.03%; Zn: 2.2%; Fe: 0.7%; Mn: 0.15%; Ni: 0.08%; Sn: 0.08%, Taking the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

(7) Secondary feeding: According to the comparison result of step (6), the remaining components of the initial raw materials are adjusted, and then placed in a preheating kiln to be preheated to 170 ° C-30 (after TC, supplemented In the melting furnace, the melting furnace is heated again, the melting furnace is heated to 650 ° C - 730 ° C, and smelted for 3 h - 5 h to make the secondary feed material into a molten state; (8) slag: slag treatment of oxidized slag floating on the surface of the smelting liquid;

(15) Stand still: Allow to stand for 30~40 minutes;

Example 7 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.34%; Si: 10.663%; Mg: 0.078%; Zn: 1.636%; Fe: 0.853%; Mn: 0.184%; Ni: 0.066%; Sn: 0.026%; balance is Al.

(2) Ingredients: Cu: 2.34% by weight; Si: 10.663%; Mg: 0.078%; Zn: 1.636%; Fe: 0.853%; Mn: 0.184%; Ni: 0.066%; Sn: 0.026%, Taking the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

(9) Converter: The smelting liquid is transferred from the smelting furnace to the refining furnace, and a second sampling and detecting operation is performed, the smelting liquid is taken, the content of each component is analyzed, and compared with the components of claim 1, the refining A permanent magnet stirrer is arranged at the bottom of the furnace, and a permanent magnet stirrer is turned on during the refining process for stirring; (10) Feeding: According to the comparison result of step (9), it is judged that the content of copper and silicon is enough to reach the content of copper and silicon in claim 1, and if not, copper and silicon are added according to the test results. ;

(15) Stand still: Allow to stand for 30~40 minutes;

Example 8 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.391%; Si: 10.839%; Mg: 0.085%; Zn: 1.765%; Fe: 0.827%; Mn: 0.207%; Ni: 0.07%; Sn: 0.034%; balance is Al. The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(2) Ingredients: Cu: 2.391% by weight; Si: 10.839%; Mg: 0.085%; Zn: 1.765%; Fe: 0.827%; Mn: 0.207%; Ni: 0.07%; Sn: 0.034%, the balance is the same or adjacent size of the waste aluminum material selected by the step (1) Starting material

(15) Stand still: Allow to stand for 30~40 minutes;

Example 9 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.328%; Si: 10.92%; Mg: 0.081%; Zn: 2.437%; Fe: 0.841%; Mn: 0.158%; Ni: 0.072%; Sn: 0.031%; balance is Al. The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(2) Ingredients: Cu: 2.328% by weight; Si: 10.92%; Mg: 0.081%; Zn: 2.437%; Fe: 0.841%; Mn: 0.158%; Ni: 0.072%; Sn: 0.031%, Taking the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

Example 10

A high-quality high-hardness aluminum alloy ingot consisting of the following components in terms of weight percentage: Cu: 2.18%; Si: 10978%; Mg: 0.082%; Zn: 2.425%; Fe: 0.873%; Mn: 0.186%; Ni: 0.076%; Sn: 0.036%; balance is Al.

(2) Ingredients: Cu: 2.18% by weight; Si: 10978%; Mg: 0.082%; Zn: 2.425%; Fe: 0.873%; Mn: 0.186%; Ni: 0.076%; Sn: 0.036%, Taking the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

(15) Stand still: Allow to stand for 30~40 minutes;

(18) Casting: Casting the product into an aluminum alloy ingot that meets the storage and transportation requirements. Example 11 A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.189%; Si: 10.611%; Mg: 0.085%; Zn: 2.254%; Fe: 0.873%; Mn: 0.166%; Ni: 0.089%; Sn: 0.033%; balance is Al.

(2) Ingredients: by weight percentage: Cu: 2.189%; Si: 10.611%; Mg: 0.085%; Zn: 2.254%; Fe: 0.873%; Mn: 0.166%; Ni: 0.089%; Sn: 0.033%, The remaining amount is taken from the waste aluminum material of the same or adjacent size cargo sorted by the step (1) to obtain the initial raw material;

(15) Stand still: Allow to stand for 30~40 minutes;

Example 12

A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.164%; Si: 10.61%; Mg: 0.081%; Zn: 2.277%; Fe: 0.872%; Mn: 0.167%; Ni: 0.078%; Sn: 0.028%; balance is Al. The production method of the high-quality high-hardness aluminum alloy ingot includes the following steps:

(2) Ingredients: by weight percentage: Cu: 2.164%; Si: 10.61%; Mg: 0.081%; Zn: 2.277%; Fe: 0.872%; Mn: 0.167%; Ni: 0.078%; Sn: 0.028%, the balance is the same or adjacent size of the waste aluminum material selected by the step (1) Starting material

(15) Stand still: Allow to stand for 30~40 minutes;

Example 13

A high-quality high-hardness aluminum alloy ingot consisting of the following components in terms of weight percentage: Cu: 2.164%; Si: 10.61%; Mg: 0.081%; Zn: 2.277%; Fe: 0.872%;

(2) Ingredients: by weight percentage: Cu: 2.164%; Si: 10.61%; Mg: 0.081%; Zn: 2.277%; Fe: 0.872%, the balance is the same or phase selected by the step (1) The waste aluminum material of the adjacent size cargo is obtained as the starting material;

Example 14

A high-quality high-hardness aluminum alloy ingot composed of the following components in terms of weight percentage: Cu: 2.164%; Si: 10.61%; Fe: 0.872%; Mn: 0.167%; Ni: 0.078%; Sn: 0.028%; The balance is Al.

(2) Ingredients: According to the weight percentage: Cu: 2.164%; Si: 10.61%; Fe: 0.872%; Mn: 0.167%; Ni: 0.078%; Sn: 0.028%, the balance is taken (1) The waste aluminum material of the same or adjacent size cargo is obtained, and the starting material is obtained;

(15) Stand still: Allow to stand for 30~40 minutes;

(18) Casting: Casting the product into an aluminum alloy ingot that meets the storage and transportation requirements. In the above embodiments of the present invention, the sampling and detection are performed by using a spectrum analyzer to analyze each component. the amount. Each of the obtained high-quality high-hardness aluminum alloy ingots contains 0 to 2.9% of Zn and 0 to 0.5% of Mn; 0 to 2.9% of Zn and 0 to 0.5% of Mn, thereby increasing the hardness of the product; The high-quality high-hardness aluminum alloy ingot contains 0-0.3% of Ni, which effectively improves the strength of the product at high temperature; the content of Mg is less than 0.1%, which ensures that the aluminum alloy product has good flexibility and is not brittle, and at the same time The gas content of the obtained aluminum alloy product is lowered, and the quality of the product is improved. The permanent magnet stirring used in the invention is a non-contact stirring of the aluminum liquid by the magnetic field generated by the permanent magnet, which does not pollute the alloy melt, and the magnetic inductor is placed at the bottom of the furnace, and the alloy melt at the bottom of the furnace is obtained. The stirring force is large, the top stirring force is small, that is, the oxide film on the surface is not easily broken, effectively reducing the surface oxidation of the alloy melt, reducing the burning loss, reducing the melt inhalation, improving the uniformity of the alloy composition, and improving Melting speed, improve the intrinsic quality of the alloy; refining degassing can remove impurities and gases in the aluminum liquid, after refining and degassing, the aluminum liquid content can reach 0.26cc/100gAl or less, and the hydrogen in the aluminum liquid can be used by the hydrogen measuring instrument. The content is tested. The purpose of the static setting is to further reduce the gas content; the casting process preferably casts the aluminum ingot through the casting machine, and the three cooling devices rapidly cool the aluminum ingot to make the internal structure of the product high quality, ensuring that the aluminum ingot reaches a high hardness standard.

The high-quality and high-hardness aluminum alloy ingot described in the invention adopts a smelting waste sorting and removing iron machine, a materializing trolley, an aluminum smelting automatic feeding system, an auxiliary hydrogen measuring instrument and the like, and an advanced melting equipment in the production process. By replacing manual work with instruments and equipment, labor can be saved, production efficiency can be improved, and the composition and quality requirements of aluminum ingots are also guaranteed. This product has been mechanized and can be continuously produced in batches.

The smelting furnace and the refining furnace in the invention are all equipped with a permanent magnet stirring system, and the aluminum melt is regularly stirred by the permanent magnet stirring in the production process, and the rotating power of the magnetic field is stable and controllable, so that the aluminum liquid can be produced lower. The amount of hydrogen or other slag content reduces the oxidation slag generated in the furnace; the aluminum liquid vortex generated by the magnetic field rotating power can make the chemical composition in the aluminum liquid uniform and improve the crystal quality of the alloy; the melt chemical composition after stirring is uniform No secondary pollution, small segregation.

In summary, the high-quality high-hardness aluminum alloy ingot provided by the invention has the following advantages compared with the prior art: low labor intensity, low cost, high efficiency, good mechanical and processing properties, high hardness of the alloy, It has ultra-low gas content, low slag content, high cleanliness of the melt, stable and uniform alloy composition, small segregation of components, fine crystal structure of the product, no coarse and brittle hard phase, uniform distribution of silicon, iron and its compounds in aluminum. The heat resistance of the product is good in the matrix; the high quality and high quality provided by the invention Compared with the prior art, the production method of the hardness aluminum alloy ingot has the following advantages: Sorting by using the "smelting waste material sorting iron removing machine and the materializing trolley"; sorting waste aluminum materials of different sizes by using machinery Come out, improve the efficiency of sorting, and make it more widely used; the use of "aluminum smelting automatic feeding system" for feeding, greatly reducing the labor intensity, effectively improving the production efficiency; sampling aluminum liquid in the aluminum alloy smelting process The spectral analyzer is used to accurately detect the sampled aluminum liquid, and the aluminum liquid composition is controlled in real time. At the same time, the advanced permanent magnet stirring technology is used in the smelting to ensure the uniformity of the alloy composition and control the composition segregation; "Gas device" performs degassing and uses powder refining operation, and the product produced by the invention has ultra-low gas content and slag content; since waste aluminum material is used as raw material; production method is produced by the production method of the invention The products are low in production cost and high in efficiency.

The above-mentioned embodiments are merely illustrative of the embodiments of the present invention, and the description thereof is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

Claim

A high-quality high-hardness aluminum alloy ingot characterized by: in terms of weight percent, consisting of: Cu: 2.0% to 3.0%; Si: 9.5% to 11.5%; Mg: 0 to 0.1%; Zn : 0 to 2.9%; Fe: 0.6 to 1.0%; Mn: 0 to 0.5%; Ni: 0 to 0.3%; Sn: 0 to 0.15%;

2. The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 1, which comprises the following steps:

(2) Ingredients: Cu: 2.0%~3.0% by weight, Si: 9.5%~11.5%, Mg: 0~0.1%, Zn: 0~2.9%, Fe: 0.6~1.0%, Mn: 0~ 0.5%, Ni: 0~0.3%, Sn: 0~0.15%, the remainder is taken from the waste aluminum material of the same or adjacent size of the selected ones of the first step (1) to obtain the starting material;

(3) One-time feeding: taking 55%-70% of the mass of each raw material in the initial raw material, pre-heated to 170°C-300°C in the preheating kiln, and then sent to the melting furnace;

(7) Secondary feeding: According to the comparison result of step (6), the remaining components of the initial raw materials are adjusted, and then placed in a preheating kiln to be preheated to 170 ° C-30 (after TC, supplemented In the melting furnace, the melting furnace is heated again, and the melting furnace is heated to 650 ° C-73 (TC, smelting for 3 h - 5 h, so that the secondary feed material is molten;

(9) Converter: Move the smelting liquid from the smelting furnace to the refining furnace for the second sampling and testing operation. Taking the molten liquid, analyzing the content of each component, and comparing with the components of claim 1, the bottom of the refining furnace is provided with a permanent magnet stirrer, and the permanent magnet stirrer is turned on during the refining process for stirring;

(11) Melting furnace melting: Control the temperature at 720 ° C - 740 ° C, melt the silicon and copper added, and conduct a third sampling test on the melt, take the molten liquid, analyze the content of each component, and the right The components in claim 1 are aligned;

(13) Refining and degassing: The temperature of the aluminum liquid is adjusted to 680~710 °C for refining and degassing, and the degassing time is 30 to 50 minutes;

(15) Stand still: Allow to stand for 30~40 minutes;

(17) On-line degassing: the nitrogen gas with a purity of not less than 99.99% is again introduced into the molten liquid for on-line degassing;

3. The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 2, wherein: the refining and degassing is specifically: placing the powder refining agent in the powder spraying tank with a purity of not less than 99.99% Nitrogen blows the powdered refining agent into the inside of the melt and removes it while removing the refining

The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 3, wherein the powdered refining agent is blown into the molten liquid through the reinforced hose and the iron pipe.

5. The method for producing a high quality high hardness aluminum alloy ingot according to claim 2, characterized in that In the online degassing, a nitrogen gas is introduced into the degassing tube of the τ type ceramic.

6. The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 2, wherein: the scrap aluminum material is sorted by size by using a smelting waste sorting iron remover and a sorting trolley.

The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 2, characterized in that: the step (8) and the step (9) further comprise a step (8') secondary sampling test : The molten liquid is taken, and the content of each component is analyzed by a spectrum analyzer and compared with the components of claim 1.

The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 2, wherein: the sampling and detecting uses a spectrum analyzer to analyze the content of each component.

9. The method for producing a high-quality high-hardness aluminum alloy ingot according to claim 2, wherein the feeding is performed by an aluminum smelting automatic feeding system.