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: 2018-04-24
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 formulations of Example 1 to Example 15 are shown in Table 1.

[0068] Among them, Example 1 and Example 2 are HPb59-1 and C36000 lead brass alloys, which are produced in accordance with conventional melting-casting, extrusion, drawing, straightening, and annealing process steps.

Embodiment 3 to Embodiment 15

[0069] The preparation methods of Example 3 to Example 15 are as follows:

[0070] The ingredients of each component are smelted in a low-frequency smelting furnace, and the ingot is vertically semi-continuously cast. The casting temperature is 990℃-1030℃, and it is heated and extruded into a Φ20mm billet. The extrusion temperature is 630℃-670℃ , Drawing into a Φ19mm bar, and then stress annealing at 250℃-280℃, the heating rate of stress relief annealing is 40-45℃ / min when the temperature is below 200℃, and 5-8℃ / min when it is above 200℃. 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, it is straightened and fixed to length to produce a finished bar. Sampling of the obtained rod blanks was performed according to GB / T5121-2008 to test the content of each element in each sample of Example 1 to Example 15. The results are shown in Table 1.

[0071] The obtained rod blank was samp...

Embodiment 4

[0083] Example 4, Example 5, Example 7, Example 11, Example 12, Example 13 The surface color of the cutting force samples after turning is as Figure 5 Shown. by 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 the Mn content is more than 6wt%, and the surface color of the machinable brass alloy is white, and the Mn content reaches 9.0wt% , The surface color of brass alloy is white.

[0084] In summary, it can be seen that a Mn content of 0.5 wt% to 9.0 wt% is appropriate, and an Mn content of 1.0 wt% to 6.0 wt% has a better effect, and the ideal Mn content is 1.3 wt% to 4.9 wt%.

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Abstract

A cuttable machinable brass alloy and manufacturing method. The brass alloy comprises the following components in percentage by weight: 45-54 wt% of copper, 0.5-9.0 wt% of manganese, and 37-53 wt% of zinc, wherein the percentage sum of copper, manganese and zinc is greater than or equal to 95 wt%, and inevitable impurities are less than or equal to 0.1 wt%. The alloy comprises a Cu-Zn solid solution having a body-centered cubic structure and a face-centered cubic Cu-Mn solid solution. Primary steps of the manufacturing method include: mixing materials, smelting, continuous casting, scalping, drawing, stress relieving and annealing, straightening, sizing, packaging, etc. The cuttability performance and mechanical properties of the brass alloy is superior and can replace the existing cuttable brass alloy, thus addressing the scarcity of copper resources and excess of zinc resources.

Description

Technical field [0001] The invention relates to the field of alloys, in particular to a brass alloy that can be cut and processed and a preparation method. Background technique [0002] Brass has good processing properties, mechanical properties and corrosion resistance, and is one of the most widely used alloy materials in non-ferrous metals. Some functional elements are added to the copper-zinc alloy to form a multi-element brass alloy, which can meet the application of specific working conditions. The most widely used is lead brass formed by adding lead element to the copper-zinc alloy. Lead brass has the mechanical properties, corrosion resistance, hot and cold processing properties of ordinary brass, and because lead is present in the alloy as free lead points, the cutting chips are broken in the cutting process. After high-speed cutting Highly smooth surfaces can be obtained, so lead brass is widely used in various industries such as aerospace, automobiles, fasteners, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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建锋
Owner NINGBO POWERWAY ALLOY MATERIAL
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