Low-lead-boron easy-cutting antimony brass alloy and method for manufacturing same

Abstract

The invention discloses a low lead and boron easy-cutting antimony brass alloy and a preparation method thereof. The chemical components of the low lead brass alloy are that: 55-65wt percent of copper, 0.4-1.2wt percent of antimony, 0.1-0.3wt percent of lead, 0.0003-0.05 wt percent of boron, 0.05-1.5wt percent of other components, wherein, the other components comprise at least one of the elements of: magnesium, iron, tin, nickel, silicon, bismuth and phosphorus, the other elements are zinc and inevitable impurities. The production method is that: the low lead and boron easy-cutting antimony brass alloy is treated by an alloying treatment and is smelted by a cover protection method to ensure the metal antimony, boron to become intermetallic compound through fast solid solution in the melten brass; the bass casting ingots are made by continuous casting under 1020 DEG C; the bass casting is pressed under a large pressing ratio under the temperature between 680 DEG C and 750 DEG C, anneal in the middle thermal treatment is under 450-650 DEG C according to cold process conditions, when the temperature is below 400 DEG C, anneal for eliminating stress is made. The invention has the advantages that the products have good mechanical, thermoforming, corrosion resistance, polishing and electroplating performance, and successfully solves the problems of singularity of waste chips, recovery of variety of components and comprehensive utilization and recycling. The recovery can be singularity or be comprehensive such as comprehensive recovery of the waste chips of the Cu-Zn-Si system, Cu-Zn-Bi system and Cu-Zn-Sb system alloy. At the same time the lead and brass waste chips can also be partly recovered and utilized.

Description

technical field [0001] The invention relates to a low-lead brass alloy, in particular to a low-lead-boron free-cutting antimony brass alloy with excellent mechanical properties, thermoforming properties, corrosion resistance, polishing and electroplating properties and a manufacturing method thereof. It is especially suitable for civil water supply systems and sanitary ware, pipe castings, valves, connectors, hardware decoration, connectors for electronic communications, household appliances, and fasteners in machinery and automobile manufacturing industries; it is an effective Metal materials that are beneficial to human health and environmental protection are also ideal substitutes for lead brass, which is widely used at present and can cause adverse effects on the human body and the environment. Background technique [0002] Lead brass has the characteristics of excellent cold and hot processing performance, excellent cutting performance and self-lubrication, which can me...

AI Technical Summary

Problems solved by technology

[0007] Both low-lead and bismuth-containing brass Cu-Zn-Bi alloys of the above invention patents and lead-free brass Cu-Zn-Bi alloys contain bismuth, and the cost of bismuth is high during manufacture, and world resources are in short supply; Cu-Zn - Si-based alloys have high copper content and high manufacturing costs; Cu-Zn-Sb-based alloys have relatively low manufacturing costs

However, no matter it is Cu-Zn-Si series, Cu-Zn-Bi series alloys, or Cu-Zn-Sb series alloys, there is a common shortcoming, that is, waste and shavings can only be recycled, that is, a certain series of alloys can only be recycled. The waste and scrap of this series of alloys can be recycled and reused, and the scrap cannot be mixed, which brings difficulties to the actual application and production operation, and is also not conducive to the reasonable operation of the world's circular economy.

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