Lowmelting intermadiate alloy of copper and phosphor base and preparation method

Abstract

A low-smelting-point CuP-base intermediate alloy contains Cu, P, Si, Ni, Sb, Bi, Mn and Ag, and is prepared through proportioning pure Cu, red P, crystal Si, electrolytic Ni, pure Sb, pure Bi, and electrolytic Mn and Ag, pulverizing crystal Si, mixing with red P, wrapping by Cu foil, smelting electrolytic pure Cu, sequentially adding others, stirring, and casting ingot or atomizing to become particles. Its advantages are no pollution, low density and smelting point, and stable modifying effect.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a low-melting-point copper-phosphorus-based master alloy used for refining primary silicon in an aluminum-silicon alloy and a preparation method thereof. Background technique [0002] The primary silicon in aluminum-silicon alloys has to be refined to make such alloys useful. In industrial production, the method of adding phosphorus is generally used to refine primary silicon (also known as modification treatment), mainly in the form of red phosphorus, phosphorus salt or copper-phosphorus master alloy. However, there are many disadvantages in these methods: red phosphorus has a low ignition point (240°C), is unsafe to transport, and reacts violently when it deteriorates, producing a large amount of toxic P 2 o 5 Gas, which seriously pollutes the environment; the effect of phosphorus salt is unstable, and there are also environmental pollution problems during use; the ...

AI Technical Summary

Problems solved by technology

However, there are many disadvantages in these methods: red phosphorus has a low ignition point (240°C), is unsafe to transport, and reacts violently when it deteriorates, producing a large amount of toxic P 2 o 5 Gas, which seriously pollutes the environment; the effect of phosphorus salt is unstable, and there are also environmental pollution problems during use; the copper-phosphorus master alloy has a high melting point, and it is difficult to melt after being added to aluminum alloy, easy to segregate, and the effect is unstable

The aluminum-copper-phosphorus master alloy prepared by the method of the invention solves the pollution problem better when the aluminum-silicon alloy is modified, but the phosphorus content is low, which is 0.5-5%. bigger