A low-melting-point transparent alloy solidification in-situ observation device under pressure

Abstract

The invention discloses an in-situ observation device for the under-pressure solidification of a low melting point transparent alloy, and the device comprises a die which comprises an upper die and alower die. When the upper die and the lower die cooperate, a closed cavity is formed. The lower die comprises a lower die upper half part and a lower die lower half part. A side surface of the cavityis provided with a temperature sensor and a pressure sensor, and the upper die is provided with a press-resistant O-shaped sealing ring in an inset manner. The tail end of the cavity is provided witha growth room shaped like a thin piece. The bottom of the lower die is provided with an independent window. The top of the upper die is provided with a pressure control system which is used for controlling the pressure of a melt body in the cavity, and the temperature sensor and the pressure sensor are each provided with a data collection system. The upper and lower ends of the lower die are respectively provided with a temperature control system installation point and a precise temperature control system, and two sides of the independent window are respectively provided with a light source and a high-speed camera, wherein the light source and the high-speed camera are located on the same line. The device is small, simple and convenient, and the die is easy to machine. The device is good in sealing effect for the melt body of the low melting point transparent alloy.

Description

technical field [0001] The invention relates to the technical field of metal casting forming technology and moulds, in particular to a device for in-situ observation of solidification of a low melting point transparent alloy under pressure. Background technique [0002] Squeeze casting is an advanced near-net-shaping process. During the pouring process, the molten metal fills the mold smoothly, which can avoid air entrainment; during the solidification process, there is a pressure of up to 80-120MPa, which produces forced extrusion and shrinkage, which can avoid hole defects. produce. Parts produced by the squeeze casting process are very dense and can be heat treated. In addition, in squeeze casting, the effect of pressure makes the casting and the mold fit closely, enhances the heat transfer at the interface, increases the cooling rate, and refines the grains. This process is suitable for the production of stressed structural parts with high mechanical performance requir...

AI Technical Summary

Problems solved by technology

In conventional squeeze casting, it can be sealed by the precise fit of the upper and lower molds and the solidification of the molten metal in the fit gap. However, since the solidified succinonitrile-acetone alloy is in a waxy state, it can only be sealed by the metal mold under pressure. The precise fit between them is difficult to achieve the sealing of the melt

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