The quality of titanium alloy watches is mainly determined by the pickling process after heat treatment, but if the surface oxide scale formed by the previous heat treatment process is thick, or the structure is uneven, pickling does not improve the surface finish and uniformity. Therefore, full attention should be paid to the heating or surface cleaning before heat treatment.
Titanium alloy, there are dozens of alloy components, often adding cadmium, lead, iron, titanium, copper and other elements, but the content of the titanium plate element used in the watch strap is unknown to me. In recent years, titanium alloys containing 1% copper and 0.1% titanium and titanium alloys containing 22% aluminum have emerged, which generally highlight creep strength, low-temperature plasticity, and superplasticity. Titanium alloys are used in battery cases, printed boards, roofing panels, and daily hardware, so watches that use them as watch cases and straps are not expensive.
If the thickness of the scale on the surface of the titanium alloy plate is uneven, the surface finish of the base metal under thick and thin places is also different. When the titanium tube surface is pickled, the surface scale is dissolved and the base metal at the site where the scale is attached is acidic The degree of erosion is different, so the surface of the steel plate is uneven. Therefore, it is necessary to form oxide scale uniformly during heat treatment and heating. To meet this requirement, the following conditions are involved and attention should be paid.
Compared with stainless steel, titanium alloy is more advantageous in terms of weight and hardness. It is used to make watch cases. It is about half the weight of the same steel watch, and it is not prone to scratches. Correspondingly, the production cost is several times that of stainless steel. Titanium alloy also has a wide range of applications in the medical field. The “artificial bones” made with it can be connected to flesh and blood to support and strengthen, and never need to be replaced (other metal materials can not be done), so it enjoys the “pro The reputation of “biometal”, of course, watches made with it do not have to worry about skin allergies and other problems.
If oil adheres to the surface of the workpiece during heating, the thickness of the scale at the oil-attached part is different from the thickness and composition of other parts, and carburization will occur. The carburized part of the base metal under the oxide scale will be severely attacked by acid. The oil droplets ejected when the heavy oil burner initially burns, if attached to the workpiece, will have a great influence. The fingerprint of the operator can also be affected when it is attached to the workpiece. Therefore, bath masters should not directly touch the titanium alloy parts with their hands, and do not get new oil stains on the work pieces. Must wear clean gloves. If there is lubricating oil attached to the surface of the workpiece during cold working, it must be fully degreased in trichloroethylene degreasing agent and caustic soda solution, then washed with warm water, and then heat treated.