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A sensitive, casting aluminum technology, applied in the field of material science, can solve problems such as restricting the development and application of cast aluminum-copper alloys, achieve significant economic and social value, prevent hot crack defects, and achieve good technical effects.
Inactive Publication Date: 2010-06-30
SHENYANG RES INST OF FOUNDRY
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Problems solved by technology
Therefore, the development and application of cast aluminum-copper alloys are greatly limited.
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Embodiment 1
[0034] The molten alloy composition is: Cu: 4.3%, Mn: 0.7%, Ti: 0.30%, Cd: 0.10%, V: 0.3%, Zr: 0.05%, B: 0.06%, Y: 1%, and the balance is Al.
[0035] Casting radiographic flaw detection did not find hot crack defects; single cast gold type national standard test rod R m =450MPa, R p02 =360MPa, A=3%.
Embodiment 2
[0037] The molten alloy composition is: Cu: 4.7%, Mn: 0.5%, Ti: 0.24%, Cd: 0.13%, V: 0.19%, Zr: 0.09%, B: 0.03%, Y: 0.20%, and the balance is Al.
[0038] Casting radiographic flaw detection did not find hot crack defects; single cast gold type national standard test rod R m =520MPa,R p0.2 =460MPa, A=6%.
Embodiment 3
[0040] The molten alloy composition is: Cu: 5.1%, Mn: 0.4%, Ti: 0.18%, Cd: 0.20%, V: 0.09%, Zr: 0.05%, B: 0.01%, Y: 0.15%, and the balance is Al.
[0041] Casting radiographic inspection did not find hot crack defects; R m =515MPa,R p0.2 =455MPa, A=6.5%.
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Abstract
The invention relates to a low heat track sensitive high-toughness casting aluminium copper alloy which is characterized in that: on the basis of the body material, 0.001-1 percent of M is added by mass percent, and M is one of Ce, La and Y or arbitrary combination thereof; aiming at heat cracks of the aluminium copper alloy, the heat cracking inclination of the high-toughness aluminium copper alloy can be effectively reduced by microalloying and adding trace rare-earth elements, so as to develop the high-toughness casting aluminium copper alloy with low heat-cracking inclination successfully; under the same intensity, the defect of heat crack generation can be effectively reduced.
Description
technical field [0001] The invention relates to material science, and in particular provides a high-strength and tough cast aluminum-copper alloy with low thermal cracking sensitivity. Background technique [0002] Table 1 shows several cast aluminum-copper alloys with the best mechanical properties at home and abroad. This type of alloy has attracted extensive attention due to its excellent mechanical properties due to the strengthening effect of copper. However, the biggest disadvantage of this type of alloy is that it is highly sensitive to hot cracking, and the castings produced are prone to hot crack defects (see figure 1 ), so has only been used on a small number of small parts. [0003] Table 1 [0004] Alloy grade R m (MPa) R p0.2 (MPa) A(％) ZL205A 500-540 440-480 4.0-9.0 BAЛ10 500-530 390-460 4.0-8.0 KO-1 430-500 360-450 3.5-9.0 B2243 450-510 370-420 ...
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