Antimony-containing modifier for zinc-copper alloy and modification treatment method

Abstract

The invention provides a method for modification treatment on zinc-copper alloy by antimony elements. Modifier is antimony with the purify of 90.20-99.99 wt.% or zinc-antimony intermediate alloy withthe antimony-containing mass percent of 10-20%; and the modifier is added in the alloy smelting process, so that the growth of an epsilon phase can be inhibited, the number of epsilon-phase crystal nucleus is increased, the grain size of the epsilon-phase crystal nucleus is reduced, the branches are reduced, and the distribution of the particles in the alloy matrix tends to be more uniform. Meanwhile, the modification processing method is simple in process and convenient to operate.

Description

technical field

[0001] The invention belongs to the technical field of alloy materials, and in particular relates to a modification agent containing antimony element and a modification treatment method for modifying ε phase (copper-zinc compound) dendrites in a zinc-copper alloy. Background technique

[0002] The zinc-copper alloy containing 3-10% copper by mass has good mechanical properties and has good application prospects. The matrix of such alloys consists of η-Zn and ε phase (copper-zinc compound) grains. When the zinc-copper alloy is solidified, the ε phase is directly precipitated from the liquid phase first, and then grows freely at a fast growth rate. After solidification, it is easy to grow into complex and large dendrites. Such dendrites reduce the fluidity of the zinc-copper alloy and the casting performance, and at the same time bring a series of adverse effects on the structure and performance, such as: shrinkage porosity and pores are easy to remain in the ...

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