Method for detecting high-strength distorted aluminium alloy thick plate hardenability
A technology of deformed aluminum alloy and hardenability is applied in the field of detection of hardenability of high-strength deformed aluminum alloy thick plate, which can solve the problems of no national standard, low hardenability of aluminum alloy thick plate, and no effective method, etc. Achieve the effect of simple operation and optimized heat treatment process
Inactive Publication Date: 2008-06-25
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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Problems solved by technology
As the thickness of the alloy plate increases, during the quenching process after solid solution, the core of the plate is likely to be impenetrable, which will affect the subsequent aging process and the mechanical properties of the alloy.
[0004] At present, there are few studies on the hardenability of aluminum alloy thick plates at home and abroad, no effective methods have been formed, and there are no corresponding national standards to follow
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Embodiment 1
[0035] This embodiment is to detect 7B04 aluminum alloy thick plate, 7B04 aluminum alloy thick plate is commonly used to manufacture aircraft structural parts, the detection of hardenability of this alloy thick plate is of great significance for ensuring the safety of the aircraft.
[0036] In the production of 7B04 aluminum alloy thick plates, the 7B04 aluminum alloy ingots are hot-rolled into thick plates, and the thicknesses of the 7B04 aluminum alloys are 50mm and 150mm respectively. The following process is to take samples of the two 7B04 aluminum alloy thick plates respectively, perform solution heat treatment, and then perform end face quenching, measure the hardness values at different levels from the end face, and draw a curve to observe each hardness measurement level microstructural features.
[0037] The process of taking the sample: in the process of taking the sample from the aluminum alloy thick plate, a cylindrical sample with a diameter of 50mm is taken alon...
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Abstract
A hardenability test method for high strength deformable aluminum alloy slab comprises the following steps: (1) making aluminum alloy ingots into a slab through hot rolling during the process of manufacturing the high strength deformable aluminum alloy slab with the thickness of the slab being not less than 50mm; (2) taking a sample from the aluminum alloy slab for carrying out solution heat treatment, and then carrying out end quenching; (3) measuring hardness values at different layers of the quenched end face from the quenched end face along the thickness direction with the thickness of each layer being 5-10mm, drafting a curve of the hardness values, and observing the microscopic structure features of each layer of hardness measurement; (4) according to the test results in the step (3), determining the solution heat treatment regime during the manufacture process of the aluminum alloy slab after hot rolling, and updating the heat treatment technique. The method provided by the invention brings about effective analysis on the hardenability of the aluminum alloy slab, thereby facilitating the optimization of the heat treatment technique.
Description
technical field [0001] The invention relates to a method for detecting the hardenability of a high-strength deformed aluminum alloy thick plate. Background technique [0002] The 7000 series high-strength aluminum alloy is a typical aging-strengthened aluminum alloy. Alloys require solution treatment before aging. Whether the solution treatment is sufficient or not has an important influence on the subsequent aging heat treatment. Due to the high thermal conductivity of aluminum alloy and fast heat dissipation, there is no problem of hardenability in traditional aluminum alloy structural parts. However, the rapid development of the aerospace industry requires the use of a whole 7000-series ultra-high-strength aluminum alloy thick plate as a load-bearing part to replace the traditional riveted parts. Therefore, the 7000-series high-strength aluminum alloy faces a hardenability problem just like steel. The thicker the alloy plate, the more serious the hardenability problem...
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Login to View More IPC IPC(8): G01N3/60G01N3/40G01N33/20
Inventor 朱宝宏张永安王锋刘红伟熊柏青
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG