Loading method of thin-wall annular part
A ring-shaped and thin-walled technology, applied in the field of loading methods for vacuum heat treatment of thin-walled ring parts, can solve the problems of low processing efficiency, high cost, scrapped workpieces, etc., and achieve reduced processing costs, improved quality, and increased loading capacity Effect
Active Publication Date: 2013-02-20
AECC AVIATION POWER CO LTD
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Problems solved by technology
[0003] In order to overcome the deficiencies in the prior art that easily lead to the scrapping of workpieces, low processing efficiency and high cost, the present invention proposes a loading method for thin-walled ring parts
Method used
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Experimental program
Comparison scheme
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Embodiment Construction
[0010] This embodiment is a loading method of the thin-walled annular parts during vacuum heat treatment, and the number of thin-walled annular parts loaded is 36. In this embodiment, 36 thin-walled annular parts are stacked into 6 groups, and Ipsen large-scale horizontal HIQ-7472-2 vacuum air quenching furnace is used. The technical parameters of the vacuum air quenching furnace are: effective heating area 1800mm×1200mm×1200mm, cooling pressure 1bar, furnace temperature uniformity (500~750)℃ / ±5℃, (750~1100)℃ / ±10℃.
[0011] The specific process of loading thin-walled annular parts into the vacuum heat treatment furnace is as follows:
[0012] Step 1, place a thin-walled ring on the workbench. Three ceramic rods of φ5mm are evenly distributed on the outer peripheral surface of the thin-walled ring, and the centerline of the ceramic rod is parallel to the center line of the thin-walled ring, and the ceramic rods are bound on the outside of the thin-walled ring with wire rods. ...
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Abstract
A loading method of thin-wall annular parts. Thin-wall annular parts are stacked up layer by layer, and three ceramic rods are uniformly distributed on outer circumferential surfaces of the thin-wall annular parts. The ceramic rods are binded on the outer circumferences of the thin-wall annular parts layer by layer by wires with a diameter of 1.2 mm. During binding, the used wires pass through the inner holes of the thin-wall annular parts, and the two ends of the wires are knotted tightly at the ceramic rods on the outer surfaces of the thin-wall annular parts; therefore, the ceramic rods are fixed on the outer surfaces of the thin-wall annular parts, and the thin-wall annular parts are separated from each other by the wires winding on the end surfaces of the thin-wall annular parts during binding. The selected wires have a thermal expansion coefficient close to the thermal expansion coefficient of the thin-wall annular parts, and have good comprehensive performance at a corresponding heat treatment temperature, which facilitates the uniform release of the internal stress of the thin-wall annular parts, overcomes the deficiencies of severe warping, deformation and bonding easily-generated on workpiece surfaces in the prior art, improves the workpiece quality, and reduces production cost.
Description
technical field [0001] The invention relates to the loading of workpieces for vacuum heat treatment, in particular to the loading method for vacuum heat treatment of thin-walled annular parts. Background technique [0002] Before the improvement, the vacuum heat treatment adopts the superposition of two workpieces, relying on the loading method of the fixed weight of the workpiece itself. During the vacuum heat treatment of thin-walled circular workpieces, due to the irregular release of internal stress, and no effective measures to limit the warping, deformation and bonding of the workpiece before loading, the surface of the workpiece is prone to serious warping, deformation and bonding At the same time, after the vacuum heat treatment of the workpiece is completed, the high-flow high-purity argon cooling gas and the high-temperature workpiece without isolation can easily cause warping, deformation and bonding of the workpiece, and even lead to the scrapping of the part. T...
Claims
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IPC IPC(8): C21D9/40
Inventor 王福平梁养民刘智武李长青谢国印彭颖陈娟娟
Owner AECC AVIATION POWER CO LTD