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Machinable brass alloy and preparation method thereof

A brass alloy, cutting processing technology, applied in the field of alloys, can solve the problems of low strength, hardness, creep resistance and fatigue strength of zinc and aluminum alloys

Active Publication Date: 2015-11-11
NINGBO POWERWAY ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy uses a lot of cheap zinc, aluminum and other elements, and has good machinability, but because the strength, hardness, creep resistance, fatigue strength and other properties of zinc-aluminum alloy are much lower than that of lead brass, it cannot be completely meet the needs of the application

Method used

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  • Machinable brass alloy and preparation method thereof
  • Machinable brass alloy and preparation method thereof
  • Machinable brass alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 15

[0067] The formula of embodiment 1 to embodiment 15 is as shown in table 1.

[0068] Among them, Example 1 and Example 2 are HPb59-1 and C36000 lead brass alloys, which are produced according to the conventional process steps of casting, extrusion, drawing, straightening, and annealing.

Embodiment 3 to Embodiment 15

[0069] The preparation method of embodiment 3 to embodiment 15 is as follows:

[0070] The ingredients of each component are smelted in a low-frequency melting furnace, and the ingot is cast vertically and semi-continuously. The casting temperature is 990°C-1030°C, and it is heated and extruded into a Φ20mm billet. The extrusion temperature is 630°C-670°C , drawn into a Φ19mm billet, and then stress-relieved annealed at 250°C-280°C, the heating rate of stress-relieved annealing is 40-45°C / min when it is below 200°C, and 5-8°C / min when it is above 200°C. The stress relief annealing cooling rate is 5-7°C / min when the temperature is above 300°C, and 45-48°C / min when the temperature is below 300°C. Finally, straighten and measure the finished billet. The obtained billet was sampled, and the content of each element in each sample of Example 1 to Example 15 was tested according to GB / T5121-2008, and the results are shown in Table 1.

[0071] The obtained billet was sampled and pre...

Embodiment 4

[0083] The surface color of embodiment 4, embodiment 5, embodiment 7, embodiment 11, embodiment 12, embodiment 13 cutting force sample after turning is as follows Figure 5 shown. Depend on Figure 5 It can be seen that when the Mn content is below 6.0wt%, the surface of the machinable brass alloy is bright yellow, and when the Mn content is above 6wt%, the surface color of the machinable brass alloy is whitish, and the Mn content reaches 9.0wt%. , the surface color of the brass alloy is white.

[0084] In summary, it can be seen that the content of Mn element is 0.5wt%-9.0wt%, the effect is better when the Mn content is 1.0wt%-6.0wt%, and the ideal Mn content is 1.3wt%-4.9wt%.

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Abstract

The invention relates to a machinable brass alloy and a preparation method thereof. The machinable brass alloy is characterized by including following components, by weight, 45-54 wt% of copper, 0.5-9.0 wt% of manganese and 37-53 wt% of zinc, wherein the total weight of the three metal components is not less than 95% and the weight of unavoidable impurities is not more than 0.1 wt%. The alloy also includes a Cu-Zn solid solution having a body-centered cubic structure and a Cu-Mn solution having a surface-centered cubic structure. The preparation method includes following main process: material preparation, smelting, continuous casting, skin stripping, pulling, stress removal and annealing, straightening, sizing and packaging. The machinable brass alloy is better in machinable and mechanical performances and is greatly reduced in alloy, can be used for replacing a machinable brass alloy in the prior art, and can alleviate the problems of shortage of copper resources and excess of zinc resources.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a machinable brass alloy and a preparation method thereof. Background technique [0002] Brass has good technological properties, mechanical properties and corrosion resistance, and is one of the most widely used alloy materials in non-ferrous metals. Add some functional elements to the copper-zinc alloy to form a multi-component brass alloy, so that it can meet the application of specific working conditions. The most widely used is lead brass formed by adding lead elements to the copper-zinc alloy. Lead brass has the mechanical properties, corrosion resistance, and hot and cold processing properties of ordinary brass, and because lead exists as free lead particles in the alloy, the cutting chips are in the form of froth during the cutting process, and after high-speed cutting A high finish surface can be obtained, so lead brass has a wide range of applications in various industries such a...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C18/02C22C30/06C22C1/02
CPCC22C1/02C22C9/04C22C18/02C22C30/06
Inventor 梅景任世影陈湖赵红彬杨朝勇毛剑锋
Owner NINGBO POWERWAY ALLOY MATERIAL
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