CN105925859A - Method for preparing high-strength and high-temperature-resistant aluminum-copper alloy material - Google Patents

Method for preparing high-strength and high-temperature-resistant aluminum-copper alloy material Download PDF

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Publication number
CN105925859A
CN105925859A CN201610387194.4A CN201610387194A CN105925859A CN 105925859 A CN105925859 A CN 105925859A CN 201610387194 A CN201610387194 A CN 201610387194A CN 105925859 A CN105925859 A CN 105925859A
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China
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temperature
copper alloy
strength
alloy material
aluminum
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CN201610387194.4A
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CN105925859B (en
Inventor
张国伟
徐宏
张佳琪
李晶晶
任霁萍
任晓燕
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North University of China
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North University of China
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • 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
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22F1/057—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 of alloys with copper as the next major constituent

Abstract

The invention provides a method for preparing a high-strength and high-temperature-resistant aluminum-copper alloy material. Prepared intermediate alloy such as Al-Cu, Al-Mn, Al-V, Al-Zr and Al-Ti-B are put into a smelting furnace together with cadmium and pure aluminum, and then rare earth La is added to be stirred; Al-Ti-C is added after the materials are evenly stirred for melting; after all the materials in the furnace are melted, a refining agent is added for refining, the mixture stands still after drossing, and the mixture is poured into a metal die; the obtained aluminum-copper alloy material is subjected to heat treatment; the material subjected to heat treatment is machined into a required size for room-temperature stretching and high-temperature stretching. By optimizing the content of Cu, Mn and other elements and adding Al-Ti-C, the structure of the alloy is improved, crystalline grains are refined, the grain boundary is enhanced, room-temperature and high-temperature strength of the aluminum-copper alloy is improved, and the prepared aluminum-copper alloy material is excellent in comprehensive performance.

Description

A kind of high-strength, preparation method of high temperature resistant aluminum copper alloy material
Technical field
The invention belongs to field of material preparation, especially relate to a kind of high-strength, preparation method of high temperature resistant aluminum copper alloy material.
Background technology
Casting Al-Cu alloy has the highest room-temperature mechanical property, but its elevated temperature strength is the highest, and relevant report is less.Studying its material modification and be possible not only to improve alloy structure, improve mechanical property, and it can be made to be better able to meet industry requirement, for producing high-quality, high strength casting provides technical support.
Summary of the invention
It is an object of the invention to provide a kind of high-strength, preparation method of high temperature resistant aluminum copper alloy material, it is achieved be effectively improved alloy structure, improve the purpose of mechanical property；And it can be made to be better able to meet industry requirement, for producing high-quality, high strength casting provides technical support.
For achieving the above object, the present invention provides a kind of high-strength, preparation method of high temperature resistant aluminum copper alloy material, by optimizing the content of the elements such as Cu, Mn and adding Al-Ti-C, improve the organizational structure of alloy, crystal grain thinning, strengthens crystal boundary, improves room temperature and the elevated temperature strength of aluminium copper.
Cu:4.88%～5.3%；Mn:0.43%～0.6%；Ti:0.20%～0.35%；Cd:0.16%～0.25%；V:0.12%～0.3%；Zr:0.15%～0.2%；B:0.05%～0.06%；La:0.1%-0.3%；Al-Ti-C:0.2%～0.4%, surplus is that Al carries out dispensing；
The concrete operation step of described preparation method is as follows:
(1) according to the mass percent of element, the intermediate alloys such as Al-Cu, Al-Mn, Al-V, Al-Zr, Al-Ti-B of having configured and cadmium, fine aluminium are put into smelting furnace, and add rare earth La and be stirred；It is stirring evenly and then adding into Al-Ti-C, at 740 DEG C～780 DEG C, carries out melting；Treating that furnace charge all melts, when molten metal temperature reaches 780 DEG C, at the uniform velocity stirring 4～6min, being subsequently adding refining agent refining temperature is 725 DEG C～735 DEG C；Refining time is 1 min～2min, stands 15 min～20min after skimming；When temperature is down to 708 DEG C～712 DEG C, pour in metal type dies；
(2) aluminum copper alloy material obtained above is carried out heat treatment, solution treatment: (538 ± 5) DEG C；Insulation 14h, uses 40 DEG C～60 DEG C quenchings；Ageing Treatment: (155 ± 5) DEG C；Insulation 8h；
(3) materials processing after heat treatment is become required size, carry out room temperature tensile and drawing by high temperature respectively.
Described refining agent selects C2Cl6, and its consumption is 0.65%.
The invention has the beneficial effects as follows: by optimizing the content of the element such as Cu, Mn and adding Al-Ti-C and rare earth La is combined, improve the organizational structure of alloy, crystal grain thinning, strengthen crystal boundary, improve room temperature and the elevated temperature strength of aluminium copper so that it is there is excellent high-temperature behavior and casting character；Obtained aluminum copper alloy material excellent combination property, room temperature tensile intensity >=490MPa；High temperature (300 DEG C) tensile strength >=244MPa, elongation percentage >=8.5%.
Accompanying drawing explanation
Fig. 1 is high temperature (300 DEG C) the stretching SEM figure of embodiment 1；
Fig. 2 is high temperature (300 DEG C) the stretching SEM figure of embodiment 2；
Fig. 3 is high temperature (300 DEG C) the stretching SEM figure of embodiment 3.
Detailed description of the invention
The present invention will be described by the following examples.
Example 1
When element mass percent is Cu:5.07%, Mn:0.51%, Ti:0.2%, Cd:0.16%, V:0.12%, Zr:0.15%, La:0.3%, coordinates Al-Ti-C:0.3%, be combined.
The intermediate alloys such as Al-Cu, Al-Mn, Al-V, Al-Zr, Al-Ti-B of having configured and cadmium, fine aluminium are put into smelting furnace, add Al-Ti-C and La, at 740-780 DEG C, carry out melting, treat that furnace charge all melts, when molten metal temperature reaches 780 DEG C, at the uniform velocity stir 4-6min；Being subsequently adding refining agent (0.65% C2Cl6) and carry out refine, refining temperature is 725-735 DEG C, and refining time is 1-2min, stands 15-20min after skimming, and temperature rises to 708-712 DEG C and pours in metal type dies；Aluminum copper alloy material obtained above is carried out heat treatment, solution treatment: (538 ± 5) DEG C insulation 14h, use 50 DEG C of quenchings；Ageing Treatment: (155 ± 5) DEG C insulation 8h.Materials processing after heat treatment is become required size, carries out room temperature tensile and drawing by high temperature respectively.
After tested, under room temperature as cast condition wax-anti dispersant be respectively 208MPa, 9%, 300 DEG C stretching tensile strength and elongation percentage be respectively 250MPa, 7.85%, its SEM scheme as shown in Figure 1.
Example 2
When element mass percent is Cu:4.9%, Mn:0.48%, Ti:0.2%, Cd:0.16%, V:0.12%, Zr:0.15%, La:0.1%, coordinate Al-Ti-C:0.2%, carry out compound interpolation.
The intermediate alloys such as Al-Cu, Al-Mn, Al-V, Al-Zr, Al-Ti-B of having configured and cadmium, fine aluminium are put into smelting furnace, add Al-Ti-C and La of different content, at 740-780 DEG C, carry out melting, treat that furnace charge all melts, when molten metal temperature reaches 780 DEG C, at the uniform velocity stir 4-6min；Being subsequently adding refining agent (0.65% C2Cl6) and carry out refine, refining temperature is 725-735 DEG C, and refining time is 1-2min, stands 15-20min after skimming, and temperature rises to 708-712 DEG C and pours in metal type dies；Aluminum copper alloy material obtained above is carried out heat treatment, solution treatment: (538 ± 5) DEG C insulation 14h, use 50 DEG C of quenchings；Ageing Treatment: (155 ± 5) DEG C insulation 8h.Materials processing after heat treatment is become required size, carries out room temperature tensile and drawing by high temperature respectively.
After tested, under room temperature as cast condition wax-anti dispersant be respectively 203MPa, 12%, 300 DEG C stretching tensile strength and elongation percentage be respectively 210MPa, 8.5%, its SEM scheme as shown in Figure 2.
Example 3
When element mass percent is Cu:5.2%, Mn:0.57%, Ti:0.2, Cd:0.16%, V:0.12%, Zr:0.15%, 0.4% Al-Ti-C, 0.5%La is compound to be added.
The intermediate alloys such as Al-Cu, Al-Mn, Al-V, Al-Zr, Al-Ti-B of having configured and cadmium, fine aluminium are put into smelting furnace, add Al-Ti-C and La of different content, at 740-780 DEG C, carry out melting, treat that furnace charge all melts, when molten metal temperature reaches 780 DEG C, at the uniform velocity stir 4-6min；Being subsequently adding refining agent (0.65% C2Cl6) and carry out refine, refining temperature is 725-735 DEG C, and refining time is 1-2min, stands 15-20min after skimming, and temperature rises to 708-712 DEG C and pours in metal type dies；Aluminum copper alloy material obtained above is carried out heat treatment, solution treatment: (538 ± 5) DEG C insulation 14h, use 50 DEG C of quenchings；Ageing Treatment: (155 ± 5) DEG C insulation 8h.Materials processing after heat treatment is become required size, carries out room temperature tensile and drawing by high temperature respectively.
After tested, under room temperature as cast condition wax-anti dispersant be respectively 211MPa, 8.4%, 300 DEG C stretching tensile strength and elongation percentage be respectively 234MPa, 7%, its SEM scheme as shown in Figure 3.
Pass through above example, can further illustrate, by optimizing the content of the element such as Cu, Mn and adding Al-Ti-C and rare earth La is combined in the present invention, improve the organizational structure of alloy, crystal grain thinning, the purpose of strengthening crystal boundary are reached, improve room temperature and the elevated temperature strength of aluminium copper so that it is there is excellent high-temperature behavior and casting character；Obtained aluminum copper alloy material excellent combination property, room temperature tensile intensity >=490MPa；High temperature (300 DEG C) tensile strength >=244MPa, elongation percentage >=8.5%.

Claims (2)

1. the preparation method of an aluminum copper alloy material high-strength, high temperature resistant, it is characterized in that, the organizational structure of alloy is improved by the content and interpolation Al-Ti-C optimizing the elements such as Cu, Mn, crystal grain thinning, strengthening crystal boundary, improving room temperature and the elevated temperature strength of aluminium copper, the concrete operation step of described preparation method is as follows:
(1) according to the mass percent of element: Cu:4.88%～5.3%；Mn:0.43%～0.6%；Ti:0.20%～0.35%；Cd:0.16%～0.25%；V:0.12%～0.3%；Zr:0.15%～0.2%；B:0.05%～0.06%；La:0.1%-0.3%；Al-Ti-C:0.2%～0.4%, surplus is that Al carries out dispensing；The intermediate alloys such as Al-Cu, Al-Mn, Al-V, Al-Zr, Al-Ti-B of having configured and cadmium, fine aluminium are put into smelting furnace, and adds rare earth La and be stirred；It is stirring evenly and then adding into Al-Ti-C, at 740 DEG C～780 DEG C, carries out melting；Treating that furnace charge all melts, when molten metal temperature reaches 780 DEG C, at the uniform velocity stirring 4min～6min, being subsequently adding refining agent refining temperature is 725 DEG C～735 DEG C；Refining time is 1 min～2min, stands 15 min～20min after skimming；When temperature is down to 708 DEG C～712 DEG C, pour in metal type dies；
(2) aluminum copper alloy material obtained above is carried out heat treatment, solution treatment: (538 ± 5) DEG C；Insulation 14h, uses 40 DEG C～60 DEG C quenchings；Ageing Treatment: (155 ± 5) DEG C；Insulation 8h；
(3) materials processing after heat treatment is become required size, carry out room temperature tensile and drawing by high temperature respectively.
A kind of high-strength, preparation method of high temperature resistant aluminum copper alloy material the most according to claim 1, it is characterised in that described refining agent selects C2Cl6, its consumption is 0.65%.
CN201610387194.4A 2016-06-02 2016-06-02 A kind of high-strength, high temperature resistant aluminum copper alloy material preparation method Expired - Fee Related CN105925859B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107099710A (en) * 2017-06-28 2017-08-29 安徽华飞机械铸锻有限公司 A kind of aluminium copper and its casting method
CN108330362A (en) * 2018-03-26 2018-07-27 中南大学 A kind of the high-strength temperature-resistant casting Al-Cu alloy and preparation process of low porosity
CN114293077A (en) * 2021-12-29 2022-04-08 北京理工大学 High-strength aluminum-copper alloy for aerospace structural member and preparation method thereof
CN114807701A (en) * 2022-05-09 2022-07-29 内蒙古工业大学 Novel cerium-containing high-temperature-resistant cast aluminum alloy and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2210611C2 (en) * 2001-08-31 2003-08-20 Региональный общественный фонд содействия защите интеллектуальной собственности Process of modification of aluminum alloys
CN103695686A (en) * 2013-12-18 2014-04-02 江苏科技大学 Composite refiner for aluminum and aluminum alloy and preparation and use methods thereof
CN104498777A (en) * 2014-12-09 2015-04-08 上海航天精密机械研究所 Method for preparing ZL205A alloy containing rare earth elements

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2210611C2 (en) * 2001-08-31 2003-08-20 Региональный общественный фонд содействия защите интеллектуальной собственности Process of modification of aluminum alloys
CN103695686A (en) * 2013-12-18 2014-04-02 江苏科技大学 Composite refiner for aluminum and aluminum alloy and preparation and use methods thereof
CN104498777A (en) * 2014-12-09 2015-04-08 上海航天精密机械研究所 Method for preparing ZL205A alloy containing rare earth elements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张佳琪 等: "Al-Cu合金的热处理工艺研究", 《铸造技术》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107099710A (en) * 2017-06-28 2017-08-29 安徽华飞机械铸锻有限公司 A kind of aluminium copper and its casting method
CN108330362A (en) * 2018-03-26 2018-07-27 中南大学 A kind of the high-strength temperature-resistant casting Al-Cu alloy and preparation process of low porosity
CN114293077A (en) * 2021-12-29 2022-04-08 北京理工大学 High-strength aluminum-copper alloy for aerospace structural member and preparation method thereof
CN114807701A (en) * 2022-05-09 2022-07-29 内蒙古工业大学 Novel cerium-containing high-temperature-resistant cast aluminum alloy and preparation method thereof

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