Method forming endogenic crystal plasticized block amorphous base composite material

Abstract

The invention relates to a method forming an endogenic crystal plasticized block amorphous base composite material, which is characterized by comprising the following steps: (1) completely melting mother alloy, adjusting the temperature to be 200-250 DEG C above liquidus temperature, keeping the temperature for 10-300 s, adjusting the temperature to be 80-100 DEG C above the liquidus temperature, keeping the temperature for 10-300 s, introducing argon gas with the pressure of P0 from the upper end of a pot, and injecting the liquid mother alloy to a pulping chamber under action of the differential pressure; (2) enabling the liquid mother alloy to flow downwards along the inner wall of the infundibuliform pulping chamber which vibrates at low frequency and high amplitude, and since the temperature of the inner wall is 20-90 DEG C, enabling the liquid mother alloy to be converted into the liquid-solid coexistent alloy molten mass the endogenic crystal phase volume percentage of which is 5-15% when the liquid mother alloy flows out of the pulping chamber; and (3) after the mother alloy flows into a high pressure die-cast injection chamber, cooling the mother alloy at the rate of 0.05-0.5 DEG C / s, and when the volume percentage of the endogenic crystal phase in the liquid-solid coexistent alloy molten mass reaches 15-30%, filling under high pressure, and carrying out forced cooling. The endogenic crystal phase of the invention is fine particles, has favorable thixotropy and can realize near formation of thin-walled complex parts.

Description

technical field [0001] The invention belongs to the technical field of amorphous alloy forming, and in particular provides a forming method for precision parts of crystal-plasticized bulk amorphous-based composite materials. It can be used for the forming of bulk amorphous matrix composite materials such as zirconium series, copper series, titanium series, lanthanum series, magnesium series and aluminum series. technical background [0002] Bulk amorphous alloys have attracted the attention of many material scientists due to their high elastic limit, high tensile and compressive strength, and strong corrosion resistance. However, the vast majority of bulk amorphous alloys exhibit brittle fracture when loaded at room temperature. By adjusting the composition of the alloy and controlling the cooling rate, the alloy melt first precipitates the plastic crystal phase during cooling, and the remaining melt forms an amorphous matrix during the subsequent cooling process, and the e...

AI Technical Summary

Problems solved by technology

The invention first uses the existing amorphous material preparation technology to obtain high-purity bulk amorphous composite materials, cuts it into ingots of specific sizes according to the shaped parts, and then reheats the ingots to the liquidus temperature of the composite materials and solidus temperature range, and then obtain liquid-solid coexistence alloy melt, the process is more cumbersome and the cost is higher

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