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A kind of cold heading processing method of tc16 titanium alloy pallet nut
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A technology of TC16 and pallet nuts, which is applied in the fields of mechanical processing and fastener processing, can solve problems such as inability to adopt cold heading processing, failure to meet deformation requirements, and deterioration of organizational structure, so as to improve mechanical properties, facilitate automatic production, The effect of improving cutting performance
Active Publication Date: 2017-09-29
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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[0006] Although the TC16 titanium alloy cold heading process can produce some small deformation fasteners, the existing cold heading forming process cannot Meet the deformation requirements and cannot be processed by cold heading
However, under the action of heat, its microstructure will deteriorate, which will affect its mechanical properties. At the same time, under the action of heat and cyclic load, the hot heading die will have a low service life and increase production costs.
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Embodiment 1
[0044] This embodiment provides a kind of cold heading processing method of TC16 titanium alloy pallet nut, and its process flow chart is as follows figure 1 shown, from figure 1 It can be seen from the figure that the cold heading processing method of TC16 titanium alloy pallet nut specifically includes the following steps:
[0045] Step 1: Sample Cleaning
[0046] First, remove the oxide film on the surface of the TC16 titanium alloy rod (6.2 mm in diameter) with pickling solution, then clean the pickled titanium alloy billet with acetone and alcohol in sequence, and then dry the billet;
[0047] The second step: hydrogen treatment
[0048] Put the prefabricated sample prepared in the first step into the tubular hydrogen treatment furnace. Before filling hydrogen, the vacuum degree of the hydrogen treatment furnace should be kept at 10 -3Pa order of magnitude, the hydrogenation temperature is 650°C, and the temperature is kept for 2 hours; finally, a hydrogenation sampl...
Embodiment 2
[0056] This embodiment provides a method for cold heading processing of TC16 titanium alloy pallet nuts, wherein the method specifically includes the following steps:
[0057] Step 1: Sample Cleaning
[0058] First, remove the oxide film on the surface of the TC16 titanium alloy rod (9.3 mm in diameter) with pickling solution, then clean the pickled titanium alloy billet with acetone and alcohol in sequence, and then dry the billet;
[0059] The second step: hydrogen treatment
[0060] Put the prefabricated sample prepared in the first step into the tubular hydrogen treatment furnace. Before filling hydrogen, the vacuum degree of the hydrogen treatment furnace should be kept at 10 -3 Pa order of magnitude, the hydrogenation temperature is 700°C, and the temperature is kept for 3 hours; finally, a hydrogenation sample with a hydrogen content of 1.0wt% is obtained;
[0061] The third step: solution treatment
[0062] Perform solution treatment on the hydrogenated sample obtai...
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Abstract
The invention provides a cold heading method for a TC16 titanium alloy anchor nut. The method comprises the following steps that pretreatment is conducted on a TC16 titanium alloy anchor nut blank, and the pretreated TC16 titanium alloy anchor nut blank is obtained; hydrogen treatment is conducted on the pretreated TC16 titanium alloy anchor nut blank, and the blank subjected to the hydrogen treatment is obtained; solution treatment is conducted on the blank subjected to the hydrogen treatment, then water quenching is conducted, and the blank subjected to the solution treatment is obtained; magnetic pulse cold heading and formation are conducted on the blank subjected to the solution treatment, and the blank subjected to machining and formation is obtained; and vacuum annealing treatment is conducted on the blank subjected to machining and formation, and the TC16 titanium alloy anchor nut is obtained. By means of the method, the room-temperature plasticity of titanium alloy can be improved, and accordingly fasteners made of the titanium alloy can be formed rapidly at the room temperature; in addition, a tool used for the method is simple, and automatic production can be achieved easily.
Description
technical field [0001] The invention relates to a cold heading processing method for a TC16 titanium alloy pallet nut, which belongs to the technical field of mechanical processing and manufacturing and further belongs to the technical field of fastener processing. Background technique [0002] TC16 titanium alloy is a conventional raw material for titanium alloy fasteners. This alloy belongs to high-strength titanium alloy. It not only has high mechanical properties, but also has excellent cold heading performance, which can realize cold heading forming and meet high efficiency requirements. , Continuous and automatic production requirements. At present, small diameter bolts, screws and self-locking nuts are all formed by cold heading. [0003] The hydrogen treatment technology of titanium alloy refers to the hydrogen permeation of titanium alloy at a certain temperature. When the hydrogen content in the titanium alloy reaches the specified concentration, hydrogen can chan...
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