Formula of high-temperature-resistant vapor chamber for 3D glass hot bending machine and preparation processes thereof

Abstract

The invention discloses a formula of a high-temperature-resistant vapor chamber for a 3D glass hot bending machine, and belongs to the field of high-temperature vapor chambers and preparation processes. The high-temperature-resistant vapor chamber for the 3D glass hot bending machine comprises, by mass, 10%-40% of nickel, 30%-60% of spherical alumina powder and 20%-40% of tungsten carbide powder. The invention further discloses the two preparation processes of the formula of the high-temperature-resistant vapor chamber for the 3D glass hot bending machine. One method comprises eight steps of mixed ball milling, soaking, ball-free ball milling, compression molding, degreasing and hardening treatment, rough machining of a blank, sintering and machining, and the other method comprises seven steps of ball milling, drying and molding, degreasing, rough machining of the blank, preliminary sintering, sintering in nickel powder and machining. The vapor chamber prepared according to the formula is high in high-temperature oxidation resistance, small in thermal denaturation, low in production cost and long in service life, and the use requirements of the vapor chamber are met.

Description

technical field [0001] The invention belongs to the field of high-temperature soaking plates and manufacturing techniques, and in particular relates to a high-temperature-resistant soaking plate formula for a 3D glass hot bending machine and a preparation process thereof. Background technique [0002] With the rapid development of 3D glass, especially the rapid arrival of the 5G communication era, the traditional metal back cover of smartphones can no longer meet the demand because of the shielding of the signal. Therefore, it is cheap, easy to process, high yield, good feel, Glass with mature and stable performance stands out; however, glass is hard and brittle. In order to better seamlessly and beautifully connect with the metal middle frame, bending glass has become a necessary process. However, the bending of glass can only be carried out at high temperatures. A glass that can withstand high temperatures above 900°C without corrosion, maintain high strength and high temp...

AI Technical Summary

Problems solved by technology

[0003] Although the tungsten steel plate currently used has strong high-temperature oxidation resistance, because its alloy contains cobalt and tungsten carbide, its high-temperature oxidation resistance cannot meet the demand, resulting in a significantly insufficient service life (customers need at least 6 months of service life, But it is generally less than 2 months at present)

[0005] However, in the process of actual manufacture and use, there are three very serious problems: 1. No matter it is to increase the content of metal nickel, or to increase the sintering temperature, adopt measures such as vacuum sintering, overpressure sintering, etc., it is difficult to make it dense and dense 2. The wettability of nickel and alumina is poor. During the use of the product, oxidizing gas penetrates into the interface between alumina and nickel, causing the alumina particles to lose their bonding ability, detach from the matrix, and the material fails, and the nickel metal It is also oxidized to nickel oxide, which accelerates failure; 3. The thermal conductivity is poor and uneven, because the thermal conductivity of aluminum oxide and nickel is not good above 800°C, and the difference in thermal conductivity leads to a huge temperature difference in the vapor chamber when the temperature rises rapidly. , the internal stress increases and thermal cracks appear, and the material fails

4. The material cannot be processed by wire cutting and machining, because the densification is poor and nickel does not form a continuous skeleton, and the conductivity of the material is poor and uneven, so the material cannot be processed by machining and wire cutting, the processing is difficult, and the accuracy cannot be guaranteed

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