Amorphous metal glass forming system and process with cold-hot circulation

Abstract

The invention relates to an amorphous metal glass forming system and process with cold-hot circulation. Electric heating elements are arranged in an upper die and a lower die; the electric heating elements are connected with a temperature control device through leads; cooling through holes are formed in the upper die and the lower die; copper pipes are arranged in the cooling through holes; the copper pipes are taken as common channels for cooling water and high-pressure gas; an external cooling water device and a high-pressure gas device are communicated with each other; the temperature control device, a contact type temperature measuring device, a non-contact type temperature measuring device, a high-pressure gas device, a cooling water device, a displacement sensor and a pressure sensor which are arranged on forming equipment are connected with a main control system through communication leads; the forming equipment is connected with a forming equipment control system through a lead. In a forming process, the dies can be protected, the surfaces of the dies are prevented from being damaged, and the phenomenon of crystallization of an amorphous alloy is avoided.

Description

technical field [0001] The invention relates to an amorphous metal glass forming system and belongs to the technical field of amorphous metal forming. Background technique [0002] Metallic glasses, also known as amorphous alloys, have the advantages of metals and glasses while overcoming their respective disadvantages due to their unique disordered microstructure. Glass is fragile and has no ductility; but metallic glass is stronger than steel, harder than high-hard tool steel, and has certain toughness and rigidity. Therefore, people call metallic glass "unbreakable and unbreakable". The King of Glass". Amorphous alloys have good mechanical, physical and chemical properties such as high strength, high hardness, good wear resistance and corrosion resistance, which determine their wide application fields and broad application prospects. [0003] Zirconium-based amorphous has lower requirements on the limit cooling rate, and a complete amorphous structure can be obtained at...

AI Technical Summary

Problems solved by technology

After the amorphous alloy is formed in the mold, there are two problems: one is that if the part is directly ejected through the ejection system of the mold after forming, since the part is still in a supercooled liquid state after forming, the ejected part is easy to cause damage to the part, such as : Top wear, deformation, cracking, etc.; Second, if the formed parts are air-cooled in the mold with the mold after forming, it will take a long cooling time, which will easily lead to partial crystallization of the formed parts, and it is impossible to obtain a complete amorphous alloy parts, and the production efficiency is also very low

In the forming process, if forming at a fixed strain rate, it will lead to a longer deformation time, so that the amorphous alloy can only be formed at a temperature as close as possible to Tg, and near Tg, the viscosity of the amorphous alloy is higher, If the strain rate is too large, the flow stress of the amorphous alloy will increase. Excessive flow stress will lead to the destruction of the amorphous alloy, and the surface of the mold will be damaged because the pressure on the mold exceeds the yield strength of the mold material. or cause mold damage

Forming at a fixed strain rate, if the selected forming temperature is far away from Tg, the viscosity of the amorphous alloy will decrease, but at this time the time available for forming the amorphous alloy will be greatly reduced. If the rate is too slow, the amorphous alloy will It has been crystallized before it is fully formed, so that the forming cannot be completed, and qualified amorphous alloy parts cannot be obtained

[0006] During the forming process of amorphous alloys, since the interior of amorphous alloys cannot achieve uniform temperature, the deformation of each area is also uneven, resulting in different deformation heat in each area, which aggravates the uneven temperature of amorphous alloys. sex

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