With the advent of the era of 5G, mobile phone 3D glass screen and back cover will be into explosive growth, the most important thing is to hot bending glass lenses production process of forming. In the hot bending machine evenly heat in the process of high temperature hot pressing glass, you need to use to the high temperature resistant, thermal conductivity of the powder metallurgy soaking plate to heat evenly hot pressing operations.

We use tungsten carbide has good strength and toughness, coefficient of thermal conductivity to the principle of increase and decrease with increasing of tungsten carbide plate, tungsten carbide of coefficient of thermal conductivity is greater than the titanium carbide, adding nickel, chromium carbide can effectively inhibit alloy creep, improve the ability to resist plastic deformation, and can improve the corrosion resistance ability; Molybdenum carbide with high melting point and hardness, good thermal stability and mechanical stability and excellent corrosion resistance, etc, tantalum carbide can improve the product high temperature hardness, strength and resistance to high temperature oxidation, the development of the cemented carbide soaking plate has high hardness, good strength, high temperature resistant, high temperature oxidation resistance, good thermal conductivity and high temperature uniformity, completely meet the requirements of the 3D glass bending machine.

The most important part of the 3D glass production process is hot bending. Hot bending core workspace heating temperature often reaches 850 ℃ to 950 ℃ to 1150 ℃ or higher, so high temperature hot bending machine soaking for 3D glass tungsten carbide plate is to have special requirements, and glass material under the condition of high temperature have strong corrosion effect. It should not only guarantee the density of soaking slab high hardness, and to ensure that the high-temperature thermal deformation and strong corrosion resistance, this undoubtedly for powder metallurgy new material is a kind of new material application requirements and challenges. The tungsten carbide soaking plate of our company has excellent high temperature hardness, high thermal conductivity, thermal stability, high temperature resistant deformation and excellent anti-corrosion resistance.

The main process production directly affects the use performance of 3D glass thermal bending machine.

1. Preparation process of mixture.

The physical and chemical properties of tungsten carbide plate are controlled by the optimum composition ratio, including the room temperature and high temperature hardness, corrosion resistance, oxidation resistance, bending resistance and compressive strength. The grinding stability of each batch of mixture is controlled by the ball milling factor, including the distribution of WC particle size, the distribution of hard phase and bond phase, to control the fluctuation of the physical properties of the alloy.

2. Pressing process

It can be used to control the sintering deformation of the alloy and reduce the internal stress of the alloy.

3. Sintering process

Through multiple atmosphere removal compact forming agent, strictly control the compact surface and core, the boat interface and boat interface carbon potential, and through the optimal control in the process of alloy in sintering temperature curve to contraction, strictly control the size of the alloy, parallelism and minimal internal stress.

4. Heat treatment process

Make the best heat treatment process, through high temperature quenching change phase structure of the binding phase, related components dissolved in full, to strengthen the binding phase, improve alloy strong toughness and corrosion resistance, and eliminate alloy produced in the process of sintering shrinkage internal stress, good for alloy after surface finish.

5. Aging treatment process.

After grinding, the tungsten carbide is treated by aging process, and the processing stress produced by alloy in fine grinding is treated, and the dimension and parallelism of the alloy are controlled.

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