A kind of environment-friendly silicon-tin brass suitable for forging and its manufacturing method

Abstract

The invention relates to an environment-friendly silicon tin brass suitable for forging. The environment-friendly silicon tin brass comprises the following components in percentages by weight: 66-72% of copper, 0.4-3.0% of silicon, 0.03-1.0% of tin, 0.001-0.1% of titanium, not more than 0.2% of lead and the balance of zinc and unavoidable impurities, wherein the total amount of the unavoidable impurities is not more 0.2%. A preparation method comprises the following steps of: firstly, preparing copper silicon and copper titanium intermediate alloys; then sequentially adding electrolytic copper, the copper silicon intermediate alloy, electrolytic zinc and a tin ingot into an induction electric furnace to smelt; adding the copper titanium intermediate alloy after all metals are melted; thenpouring a copper alloy ingot, wherein a copper alloy cast ingot is heated to 650-750 DEG C and thermally extruded; uniformly annealing an extruded semifinished product; and then carrying out acid washing, stretching, straightening and stress relief annealing to obtain a finished product. In the invention, lead is replaced with silicone to improve the cutting property and the forging property of the alloy, tin is used for improving the cutting property and the dezincification and corrosive resistances of the alloy, and the titanium is used for refining crystal grains. Comparative experiments show that the environment-friendly silicon tin brass suitable for forging has better forging property, cutting property and dezincification and corrosive resistances.

Description

[0001] technical field [0002] The invention relates to a silicon-tin brass and a manufacturing method thereof, in particular to an environment-friendly silicon-tin brass suitable for forging and a manufacturing method thereof. Background technique [0003] Brass has a beautiful appearance and excellent performance. It is widely used in the fields of instruments and meters, electronic appliances, daily hardware, plumbing valves, etc. Among them, HPb59-1 is the most widely used. At present, most of the brass used for forging contains 35-45 wt% zinc, which belongs to α+β duplex brass. This type of brass has excellent plasticity at high temperatures, so it is suitable for hot forging. In order to improve the machining and cutting performance after forging, a small amount of lead (about 0.8 to 3.5%) is added to this brass, which brings convenience to the processing of complex-shaped daily necessities and plumbing valve parts. [0004] As people pay more and more attention to ...

AI Technical Summary

Problems solved by technology

But their disadvantages are: the copper content of the first patent is too high, and the cost of raw materials is also high, which is difficult for customers to accept; the cutting performance of the second patent is not good, the workpiece generates a lot of heat, and the tool wears seriously

Based on the above reasons, the application and development potential of these two materials will be restricted