Ultrahigh-strength aluminum alloy material and preparation method of pipe blank for preparing internal cylinder of separator
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A technology of aluminum alloy materials and alloy materials, which is applied in the field of material processing, can solve the problems of unreachable tensile strength, low tensile strength, and unsatisfactory inner cylinder of the separator, etc., and achieve fine structure, ensure alloy composition, and uniform texture Effect
Active Publication Date: 2011-04-06
HARBIN INST OF TECH
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[0003] The present invention is lower in order to solve the tensile strength of existing aluminum alloy material (tensile strength σ b cannot reach more than 760Mpa), and the inner barrel of the separator prepared by the existing aluminum alloy mate...
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specific Embodiment approach 1
[0033]Embodiment 1: The ultra-high-strength aluminum alloy material described in this embodiment is an Al-Zn-Mg-Cu alloy material. In terms of mass percentage, the chemical composition of the alloy is Zn 10.5-13.0wt%, Mg 2.3-3.2 wt%, Cu 1.2~1.8wt%, Mn 0.2~0.3wt%, Cr 0.2~0.3wt%, Zr 0.1~0.2wt%, Sc 0.1~0.2wt%, Fe<0.05wt%, Si<0.05wt%, The rest is Al.
specific Embodiment approach 2
[0034] Embodiment 2: In the ultra-high-strength aluminum alloy material described in this embodiment, the content of Zn is 11wt%. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0035] Embodiment 3: In the ultra-high-strength aluminum alloy material described in this embodiment, the total content of Zn and Mg is 13.7 wt%. Others are the same as in the second embodiment.
[0036] Specific implementation mode four: see Figure 1~5 As shown, the specific process of the method for preparing the tube blank for the inner cylinder of the separator based on the ultra-high-strength aluminum alloy material described in the first embodiment described in this embodiment is as follows:
[0037] (1) According to the alloy composition, the alloy is dissolved and mixed, and cast into an alloy ingot. Alloy composition by mass percentage, Zn 10.5-13.0wt%, Mg 2.3-3.2wt%, Cu 1.2-1.8wt%, Mn 0.2-0.3wt%, Cr 0.2-0.3wt%, Zr 0.1-0.2wt%, Sc 0.1~0.2wt%, Fe<0.05wt%, Si<0.05wt%, the rest is Al; according to the alloy composition, plus the amount of burning loss, the master alloy is melted;
[0038] The raw materials of the fusion alloy are respectively industrial pure Al (99.7%...
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Abstract
The invention relates to an ultrahigh-strength aluminum alloy material and a preparation method of a pipe blank for preparing an internal cylinder of a separator, belonging to the technical field of material processing and solving the problems that the traditional aluminum alloy material has lower tensile strength and the internal cylinder of the separator, which is prepared by using the traditional aluminum alloy material, can not meet the requirements on the separator for working for a long time at high rotating speed. The invention puts a technical emphasis on that the ultrahigh-strength aluminum alloy material comprises the following components in percentage by weight: 10.5-13.0wt% of Zn, 2.3-3.2wt% of Mg, 1.2-1.8wt% of Cu, 0.2-0.3wt% of Mn, 0.2-0.3wt% of Cr, 0.1-0.2wt% of Zr, 0.1-0.2wt% of Sc, less than 0.05wt% of Fe, less than 0.05wt% of Si and the balance of Al. The preparation method of the pipe blank comprises the following steps of: melting alloys, and casting into an alloy ingot; carrying out melting, casting transfer, atomized spray and deposition forming on the alloy ingot to prepare a flash set billet; carrying out isothermal forging performing; carrying out hot extrusion forming by adopting an extrusion mould; and carrying out twin-stage solid solution and aging treatment on a preformed pipe blank so as to prepare the pipe blank which can be used for preparing the internal cylinder of the separator. The invention is suitable for preparing the internal cylinder of a centrifugal separator which works for a long time at the rotating speed of 8000-10000 rpm.
Description
technical field [0001] The invention relates to an ultrahigh-strength aluminum alloy material and a method for preparing a tube blank of an inner cylinder of a separator by using the material, belonging to the technical field of material processing. Background technique [0002] Ultra-high-strength aluminum alloy is an important material in the country's aviation, aerospace and military fields, and will have an important strategic position in the country's future military, politics and economy. With the rapid development of the aerospace industry, higher and higher requirements are put forward for high-performance aluminum alloy components and their forming technology. As an advanced metal thermoforming method, spray forming technology combines the atomization and solidification of the melt into one, which can greatly improve the usability and forming performance of materials and their components. The speed of the first-generation separator is below 6,000 rpm, which is far ...
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