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Corrosion-resistant aluminum material for extrusion molding and its preparation method and application
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An extrusion molding and corrosion-resistant technology, which is applied in the field of aluminum alloy materials, can solve problems such as creep, strength reduction, and susceptibility to corrosion, so as to enhance corrosion resistance, promote fatigue resistance, and improve fatigue resistance. Effect
Active Publication Date: 2020-06-30
JIANGSU HENGTONG ELECTRICAL SPECIAL WIRE CO LTD +1
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[0002] The automobile condensation pipe is a thin-walled aluminum pipe prepared by extrusion molding process. During the operation of the automobile, the condensation pipe is easily corroded and creeps due to long-term exposure to high temperature and load, resulting in a decrease in strength
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[0029] On the basis of the above research, the inventor provides a method for preparing a corrosion-resistant aluminum material, which can be prepared into thin tubes of automobile condensers or other parts by extrusion molding. The specific steps are as follows:
[0030] S1. Raw material selection and smelting:
[0031] According to the ratio of the following components, aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, aluminum-copper alloys, aluminum-manganese alloys and aluminum rare earth alloys are selected as raw materials for batching: Si: 0.03-0.08wt%, Fe: 0.10-0.15wt%, Cu: 0.05-0.10wt%, Mn: 1.05-1.20wt%, RE: 0.005-0.18wt%, Al: the balance, wherein RE is La and Ce, and the ratio is 1:2.
[0032] Before batching, the inspection and selection of raw materials are carried out first. The purpose of the inspection is to ensure that each component meets the process requirements of this product and prevent each component from exceeding the range.
[0033] Pr...
Embodiment 1～4
[0067] Examples 1 to 4: Preparation of rolled aluminum rods for automobile condensers with a diameter of 9.5 mm
[0068] 1. Raw material ingredients
[0069] The ratio of each component in the aluminum material in Table 4 Examples 1-4
[0070]
[0071] According to the composition ratio in Table 4, the raw materials are batched, and Al99.70 remelted aluminum ingot, AlSi 12 , AlMn 10 , AlFe 20 , AlCu 50 , and AlRE 10 as a raw material.
[0072] The preparation method of the rolled aluminum rod is as follows:
[0073] Step 1: Put the aluminum ingot into the melting furnace for melting, when the temperature of the molten aluminum in the melting furnace is ≥720°C, transfer it to the holding furnace to stir evenly, and keep it at 750-780°C. Direct reading spectrometer was used to detect the content of each component in molten aluminum. When the temperature of molten aluminum in the holding furnace is 740±10℃, after adding other alloys, fully stir the melt in the furnace ...
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Abstract
The invention discloses a preparation method of an extrusion-molded corrosion-resistant aluminum material. The method comprises the steps of raw material selection and melting, molten aluminum component analysis, alloying treatment, refining, drossing, component adjustment, external refining and slag removal, continuous casting and continuous rolling. The invention further discloses the aluminum material prepared through the method and application of the aluminum material in preparation of car condensation tubes. The corrosion-resistant aluminum material prepared through the method has good corrosion resistance and fatigue resistance, and the tensile strength meets the requirements of car condensers for the extrusion-molded aluminum alloy material.
Description
technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to a corrosion-resistant aluminum material for extrusion molding, its preparation method and application. Background technique [0002] The automobile condensation pipe is a thin-walled aluminum pipe prepared by extrusion molding process. During the operation of the automobile, the condensation pipe is easily corroded and creeps due to long-term exposure to high temperature and load, resulting in a decrease in strength. Therefore, there is an urgent need to provide a corrosion-resistant aluminum material for preparing automobile condenser pipes. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a method for preparing a corrosion-resistant aluminum material for extrusion molding, which improves the corrosion resistance and fatigue resistance of the aluminum alloy. [0004] In order to solve the above-mentioned techni...
Claims
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