A process for preparing low residual thermal stress amorphous alloy

Abstract

The invention provides a process method for preparing a low residual thermal stress amorphous alloy, comprising: step S1, select a reference alloy, and use a non-metallic element that forms a low-melting point alloy with a metal element to partially replace the non-metallic element that forms a high-melting point alloy with a metal element. Form a series of alloys with different components by means of metal elements, and measure their viscosity at different casting temperatures to establish the relationship between viscosity-casting temperature-composition; step S2, measure different cooling conditions for the series of alloy melts at different casting temperatures Set up the relationship of cooling condition-solidification temperature-casting temperature-composition; step S3, at first, according to the relationship obtained in step S1, select the alloy composition of low viscosity and set the casting temperature according to the viscosity standard; then, according to the selection The alloy composition, the set casting temperature and the relationship obtained in step S2, select the cooling conditions corresponding to the increase of the supercooled solidification temperature; finally, an amorphous alloy is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal functional materials, in particular to a process for preparing amorphous alloys with low residual thermal stress. Background technique [0002] In essence, the process of preparing an alloy melt into an amorphous alloy is a supercooling solidification process of the alloy melt. In this process, the alloy melt first becomes a supercooled liquid, and as the supercooling degree of the melt increases, the melt The viscosity of the melt increases rapidly, causing the melt to lose its flow ability and finally solidify into a hard solid. When the alloy melt temperature is lower than its natural solidification temperature, it is called supercooled liquid. To make the melt a supercooled liquid, the viscosity change of the melt must lag behind the temperature change of the melt. Only in this way can the melt maintain the fluidity of the melt when the temperature is lower than the natural solid...

AI Technical Summary

Problems solved by technology

Although this method reduces the casting temperature of the alloy melt, it does not reduce the difference between the casting temperature and the solidification temperature of the melt, so it does not help to reduce the residual thermal stress of the amorphous alloy.

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