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tc17 titanium alloy surface treatment method
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A TC17, surface treatment technology, applied in the field of titanium alloy surface treatment, can solve the problem of large surface roughness of titanium alloy, and achieve the effect of reducing surface roughness
Active Publication Date: 2016-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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[0005] In order to overcome the shortcomings of the large surface roughness of titanium alloys treated by existing methods, the present invention provides a surface treatment method for TC17 titanium alloys
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Embodiment 1
[0016] (1) Anneal the TC17 titanium alloy in a heat treatment furnace, the treatment conditions are: heating temperature 550°C, holding time 1.5h, furnace cooling to room temperature;
[0017] (2) The TC17 titanium alloy is shot peened for the first time by using ASH230 shot, and the specific process parameters are: air pressure 0.45MPa, shot peening time 12min;
[0018] (3) The TC17 titanium alloy is shot peened for the second time by using ASH460 shot, and the specific process parameters are: air pressure 0.25MPa, shot peening time 3min;
[0019] (4) During the shot peening process, the size and roundness of the shot are strictly controlled by the vibrating screen and the spiral separator.
[0020] figure 1 The scanning electron micrograph of the TC17 titanium alloy surface nanostructure prepared by the present embodiment, from figure 1 It can be seen that the surface of TC17 titanium alloy undergoes severe plastic deformation after shot peening treatment, and the thicknes...
Embodiment 2
[0023] (1) Perform annealing treatment on TC17 titanium alloy in a heat treatment furnace, the treatment conditions are: heating temperature 600°C, holding time 1h, furnace cooling to room temperature;
[0024] (2) The TC17 titanium alloy is shot peened for the first time by using ASH230 shot, and the specific process parameters are: air pressure 0.43MPa, shot peening time 15min;
[0025] (3) The TC17 titanium alloy is shot peened for the second time by using ASH460 shot, and the specific process parameters are: air pressure 0.23MPa, shot peening time 5min;
[0026] (4) During the shot peening process, the size and roundness of the shot are strictly controlled by the vibrating screen and the spiral separator.
[0027] After testing, the surface roughness Ra of the TC17 titanium alloy treated in this embodiment is 2.60 μm.
Embodiment 3
[0029] (1) Anneal the TC17 titanium alloy in a heat treatment furnace under the following conditions: heating temperature 580°C, holding time 1.2h, furnace cooling to room temperature;
[0030] (2) The TC17 titanium alloy is shot peened for the first time by using ASH230 shot, and the specific process parameters are: air pressure 0.46MPa, shot peening time 10min;
[0031] (3) Use ASH460 projectile to carry out the second shot peening treatment on TC17 titanium alloy, the specific process parameters are: air pressure 0.26MPa, shot peening time 1min;
[0032] (4) During the shot peening process, the size and roundness of the shot are strictly controlled by the vibrating screen and the spiral separator.
[0033] After testing, the surface roughness Ra of the TC17 titanium alloy treated in this embodiment is 2.23 μm.
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Abstract
The invention discloses a TC17 titanium alloy surface treatment method which is used for solving a technical problem that a titanium alloy surface treated by an existing method is high in roughness. According to the technical scheme adopted by the invention, the TC17 titanium alloy surface treatment method comprises the following steps: firstly, annealing TC17 titanium alloy in a thermal treatment furnace; then, adopting ASH230 shot to perform shot blasting on the TC17 titanium alloy twice; strictly controlling the shot dimension and the shot roundness through a vibrating sieve and a spiral separator in a shot blasting process. According to the TC17 titanium alloy surface treatment method disclosed by the invention, the TC17 titanium alloy surface realizes nano-crystallization after performing shot blasting for the first time; after performing the shot blasting for the second time, a large-dimension shot is adopted to knock the TC17 titanium alloy surface at a low speed, so that a purpose of flattening the surface subjected to the first-time shot blasting is realized, and thus, the surface roughness of the TC17 titanium alloy is greatly lowered. According to a test, the surface roughness of the CT17 titanium alloy treated by the method is lowered by 61% to 1.89-2.60 microns from 4.80 microns in the background technology.
Description
technical field [0001] The invention relates to a titanium alloy surface treatment method, in particular to a TC17 titanium alloy surface treatment method. Background technique [0002] Surface nanotechnology prepares a certain thickness of surface nanostructures on the surface of metal materials by introducing large plastic deformation, which can significantly improve the surface layer and finishing properties of metal materials, such as mechanical properties, corrosion resistance and other properties, and is considered to be the most promising in the field of nanostructured materials. One of the practical technologies that may realize industrial applications. TC17 titanium alloy is a β-rich two-phase titanium alloy, which has the advantages of high strength, good fracture toughness, high hardenability and wide forging temperature range, and is widely used in aerospace and other fields. With the rapid development of aerospace, the harsh service environment puts forward hig...
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