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Preparation method of TC4 titanium alloy plate material for 3C products

A technology for titanium alloy plates and products is applied in the field of preparation of TC4 titanium alloy plates for 3C products, which can solve the problems of large machining amount of plates, low material yield and high production cost, and achieves reduction of machining amount and improvement of The effect of yield and production cost reduction

Active Publication Date: 2017-12-15
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual production process, in order to meet the flatness requirements of the sheet, the amount of sheet machining is large, the material yield is low, and the production cost is high, and the TC4 titanium alloy sheet is prone to uneven color and spots after the above surface treatment and other defect characteristics, which are closely related to the microstructure and mechanical properties of the sheet, so it is necessary to optimize the TC4 sheet preparation process to meet the market's cost and quality requirements

Method used

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  • Preparation method of TC4 titanium alloy plate material for 3C products
  • Preparation method of TC4 titanium alloy plate material for 3C products
  • Preparation method of TC4 titanium alloy plate material for 3C products

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preparation example Construction

[0029] A preparation method of TC4 titanium alloy sheet material for 3C products, comprising the following steps: Step 1, using titanium sponge, aluminum vanadium master alloy, aluminum particles and titanium dioxide powder with a purity greater than 99.5% for batching and pressing electrodes, and then using vacuum plasma The welding box is used for electrode group welding, and the vacuum consumable electric arc furnace is used for smelting. The number of smelting is not less than 2 times. After the last smelting, the ingot riser is cut off and the lathe is peeled to obtain the ingot; among them, the sponge The purity of titanium is grade 0 or 0 A Grade sponge titanium, and remove the powdered sponge titanium rich in N, O and Fe impurity elements with a particle size below 3mm. The particle size of the sponge titanium is 3-12.7mm; the components and mass fractions of the prepared ingot are: Al 5.7~6.3%, V 3.7~4.3%, Fe 0.10~0.25%, C≤0.05%, N ≤0.02%, O 0.05~0.10%, H ≤0.002%, and...

Embodiment 1

[0041] A method for preparing a TC4 titanium alloy sheet for 3C products, the target size of the TC4 titanium alloy sheet is length×width×thickness=155×80×7mm; comprising the following steps:

[0042] The first step, ingot smelting: select 0-grade sponge titanium, aluminum vanadium master alloy, aluminum beans and 99.8% pure titanium dioxide powder in the particle size range of 3~12.7mm for batching, pressing and welding electrodes, and secondary smelting in vacuum consumable electric arc furnace , then remove the riser and peel off the skin, and take samples at the ingot head, middle and tail, and test the composition, and the composition is as shown in table 2;

[0043] The second step, slab preparation: use the metallographic method to measure the β phase transition temperature T of the above-mentioned TC4 ingot β =960°C. The ingot is heated to 1100°C for one-fire pier drawing forging, the total deformation of the second fire is 180%, and the billet is ground for second-fi...

Embodiment 2

[0056] A method for preparing a TC4 titanium alloy sheet for 3C products, the target size of the TC4 titanium alloy sheet is length×width×thickness=225×100×20mm; comprising the following steps:

[0057] The first step, ingot smelting: choose 3~12.7mm particle size range 0 A Grade sponge titanium, aluminum vanadium master alloy, aluminum beans and 99.8% pure titanium dioxide powder are used for batching, pressing and welding electrodes, and secondary smelting in vacuum consumable electric arc furnace. , Tail sampling, test composition, the composition needs to meet Al 5.7~6.3%, V 3.7~4.3%, Fe 0.10~0.25%, C≤0.05%, N ≤0.02%, O 0.05~0.10%, H ≤0.002%, other The amount is Ti;

[0058] The second step, slab preparation: use the metallographic method to measure the β phase transition temperature T of the above-mentioned TC4 ingot β =965°C. The ingot is heated to 1160°C for one-fire pier-drawing forging, and the total deformation of the fire is 250%. The total deformation of the fo...

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Abstract

The invention relates to a preparation method of a TC4 titanium alloy plate material for 3C products. The preparation method comprises the following steps: cast ingot smelting, plate blank preparation, plate rolling, heat treatment, plate shape correction, surface treatment, discharging and machining. According to the preparation method of the TC4 titanium alloy plate material for 3C products, through the control over the components and the processing technology, both the microstructure and the mechanical property of the plate material are optimized, a fine, uniform and microscopic equiaxed structure is obtained, an medium and low range microhardness characteristic is achieved, and follow-up surface treatment processing steps such as polishing are facilitated; besides, with the adoption of the TC4 titanium alloy plate material prepared by adopting the preparation method, the 3C products are more uniform and beautiful in color and luster due to surface treatment, the problems such as nonuniform color and spot defects caused by surface treatment are avoided, the requirements of the 3C products and related accessories on the manufacturing cost and quality of shells are met, both the equipment and process are simple, and the stable and large-scale production is realized.

Description

technical field [0001] The invention relates to the field of nonferrous metal processing, in particular to a preparation method of TC4 titanium alloy sheet material for 3C products. Background technique [0002] The composition of TC4 titanium alloy is Ti-6Al-4V, which belongs to (α+β) type titanium alloy and has good comprehensive mechanical and mechanical properties. [0003] TC4 titanium alloy has excellent characteristics such as light weight, high specific strength, non-magnetic, and good texture. Compared with stainless steel, it can reduce weight by more than 40%. Compared with aluminum alloy, it has higher strength and is more durable. Strong, portable consumer demand, and resistant to human sweat corrosion, good affinity with the skin, no allergic reactions, can be processed into ultra-thin, light weight, strong structure, good texture casing, in high-end 3C products (computers, communications and Consumer electronics) and related accessories shell manufacturing ha...

Claims

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Application Information

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IPC IPC(8): C22F1/18C22C14/00C22C1/03
CPCC22C1/03C22C14/00C22F1/183
Inventor 李渤渤李洋张强刘茵琪王非
Owner LUOYANG SUNRUI TI PRECISION CASTING
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