A kind of pure titanium bar material for watch structural parts and preparation method thereof
A technology for structural parts and rods, which is applied in the field of pure titanium rods for watch structural parts and its preparation, can solve the problems of low yield of structural parts, low hardness of pure titanium materials, increased component costs, etc., and achieve good performance consistency , uniform organization, and the effect of improving production efficiency
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[0023] The invention discloses a method for preparing a pure titanium bar for watch structural parts, which comprises the following steps:
[0024] Step 1. Using titanium sponge, titanium dioxide, and iron nails as raw materials, the mass content of Ti element in the raw materials is 99.67% to 99.80%, the mass content of Fe element is 0.04% to 0.08%, and the mass content of O element is 0.07%. ~0.12%, the mass content of C element≤0.08%, the mass content of N element≤0.03%, and the mass content of H element≤0.015% are calculated and batched, and the above raw materials are weighed and mixed, and pressed into an electrode block by a 3500t hydraulic press , and then through the vacuum consumable arc melting furnace, the electrode block is smelted three times to obtain an ingot with a diameter of 620mm, which is then forged and rolled into a bar blank with a diameter of 18mm;
[0025] Step 2, performing stress-relief annealing on the bar blank with a diameter of 18mm prepared in ...
Embodiment 1
[0036] Preparation of ingot: Sponge titanium, titanium dioxide, and iron nails are used as raw materials, according to the mass content range of each element: Fe: 0.04%, O: 0.08%, C≤0.08%, N≤0.03%, H≤0.015% for batching Calculate, weigh and mix the above raw materials respectively, and then use a 3500t oil press to press them into electrode blocks, and then use a vacuum consumable arc melting furnace to prepare an ingot with a diameter of 620mm through three times of melting; and then forge and roll it into a 18mm ingot. Bar blank; the prepared bar is subjected to stress-relieving annealing treatment, the annealing temperature is 600°C, and the annealing time is 1.5h; the treated bar is firstly processed by two-roller heat straightening process, wherein the heating temperature is 480 ℃, and the holding time is 8 minutes.
[0037] Then sequentially grind by M1080 grinder→PC-18 high-precision grinder→M1040 grinder to Φ16±0.05mm, and finally a polishing machine with 4 pairs of gr...
Embodiment 2
[0039] Preparation of ingots: use sponge titanium, titanium dioxide, and iron nails as raw materials, and calculate the ingredients according to the content range of each element: Fe0.06%, O0.12%, C≤0.08%, N≤0.03%, H≤0.015% , and the above raw materials were weighed and mixed, and then pressed into an electrode block with a 3500t hydraulic press, and then melted three times in a vacuum consumable arc melting furnace to prepare an ingot with a diameter of 620mm; and then forged and rolled into a rod with a diameter of 22mm material blank; the prepared bar is subjected to stress relief annealing treatment, the annealing temperature is 630°C, and the annealing time is 1.5h; the treated bar is firstly processed by two-roller heat straightening process, wherein the heating temperature is 480°C , the holding time is 8 minutes; then it is processed to Φ20±0.05mm through sequential grinding treatment of M1080 grinder → PC-18 high-precision grinder → M1040 grinder, and finally a polishi...
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Abstract
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