Device and method for continuous block metal glass shaping

Abstract

The invention relates to a device and method for continuous block metal glass shaping, belonging to the technical field of metal material preparation. A heat insulating ring is arranged between a graphite casting mould and a water cooling copper mould which are arranged in a first vacuum chamber, an air cooler is arranged in a second vacuum chamber, and a traction rod enters the graphite casting mould and horizontally moves by a traction device. The method uses the graphite casting mould and the water cooling copper mould for primary main cooling and the air cooling mode for secondary auxiliary cooling, and the two vacuum chambers have a certain air-pressure difference. The device and the method have a high cooling speed, satisfy the requirements of the amorphous phase change of the block metal glass material. The shaping pressure of a metal melting body can be easily controlled, and the good shaping performance of the metal melting body is ensured by adjusting the pressure in the vacuum chambers. The metal passes through the graphite casting mould in a liquid state and is solidified in the water cooling copper mould, and the casting graphite casting mould has long service. The composite casting mould and the traction device have exchangeability to be convenient for realizing the continuous shaping of rod wires, boards, pipes and abnormal-shaped materials of different section sizes.

Description

Technical field [0001] The invention relates to a device and method for continuous forming of bulk metallic glass, belonging to the technical field of metal material preparation, and in particular to a continuous preparation technology of bulk metallic glass and non-equilibrium solidified materials. Background technique [0002] Bulk metallic glass is an amorphous material with higher thermal stability than ordinary amorphous alloys. The alloy melt does not undergo crystallization and solidification even at a slow cooling rate of 0.1 to hundreds of K / s. The amorphous structure of the phase is frozen to a solid state, and an amorphous single-phase bulk material with a three-dimensional size of millimeters or more can be obtained by casting. Compared with crystalline metal materials, bulk metallic glass has more excellent mechanical, physical, chemical properties and precision molding characteristics, and has shown good application prospects in aerospace devices, precision machiner...

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Problems solved by technology

It is mainly manifested in the following aspects: 1. Bulk metallic glasses often contain chemically active elements, and the amorphous phase transition requires high purity of the metal melt, and the melting and forming of the alloy need to be carried out under the protection of vacuum or inert gas. 2. The forming of bulk metallic glass requires a large cooling rate, while in the continuous casting process of crystalline alloys, the cooling of the billet mainly depends on the water spray cooling in the secondary cooling zone, and the primary cooling zone (initial solidification part) The main function is to form the initial solidified shell and form the metal, and the distance between the primary cooling and the secondary cooling is long, the cooling rate is low, the temperature of the solidified amorphous shell rises again, and crystallization occurs; 3. Alloy non-crystalline The process of crystal phase transformation basically does not produce solidification shrinkage, which causes an increase in the frictional resistance between the billet and the mold. This problem is more prominent when using a copper long crystallizer for horizontal continuous casting of steel; 4. Water vapor is not only seriously reduced The vacuum degree of the vacuum system will also chemically react with the alloy to reduce the glass-forming ability of the alloy. Water is used as the cooling medium and must be placed outside the vacuum chamber, and the cooling medium with low vapor pressure has low cooling strength.

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