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A lead-free free-cutting high-sulfur manganese-containing copper alloy and its manufacturing method

一种锰铜合金、易切削的技术，应用在无铅易切削铜合金及其制造领域，能够解决石墨含油自润滑轴承强度有限、界面强度低、不能满足重载高速的使用环境等问题，达到优异工艺性能、切削性能好、热锻高的效果

Active Publication Date: 2017-11-03
HUNAN TERRY NEW MATERIALS COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But like lead, graphite has almost no solid solution with copper, its combination with copper is mechanical meshing, no metallurgical bond is formed, and the interface strength is low
This results in the limited strength of graphite oil-containing self-lubricating bearings, which cannot meet the heavy-duty and high-speed operating environment

Method used

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  • A lead-free free-cutting high-sulfur manganese-containing copper alloy and its manufacturing method
  • A lead-free free-cutting high-sulfur manganese-containing copper alloy and its manufacturing method
  • A lead-free free-cutting high-sulfur manganese-containing copper alloy and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The mass fractions of each element in the manganese-containing copper alloy powder are: copper 54.0%, phosphorus 0.11%, tin 0.011%, manganese 0.6%, and the balance is zinc and unavoidable impurities. The mass fractions of various powders are as follows: the sulfide powder is a mixture of copper sulfide powder and zinc sulfide powder, the content of which is 0.8% and 0.30% respectively; the content of nickel powder is 2.0%; ; The balance is the above-mentioned manganese-containing copper alloy powder. The powder mixing time is 4.0h. After the mixing is completed, it is pressed. After the pressing, it is put into the sintering furnace for sintering. The sintering process is: heating from room temperature to the sintering temperature, heating time 5.0h, fully removing the forming agent, and sintering temperature 680 ℃, the holding time is 100min, the sintering atmosphere is an inert atmosphere, and after sintering, pass water to cool to room temperature. The sintered bras...

Embodiment 2- Embodiment 33

[0038] Embodiment 2-Example 33: See Table 1 for the chemical composition of the copper alloy powder in all examples of Example 2-33, see Table 2 for the mass percentages of various powders, and see Table 2 for the copper alloy manufacturing process parameters in the corresponding examples. Table 3, the properties of copper alloys in Examples 2-33 are shown in Table 4.

Embodiment 34

[0039] Example 34: The mass fractions of each element in the manganese-containing copper alloy powder are: copper 88%, tin 10.0%, manganese 1.5%, and the balance is zinc and unavoidable impurities. The mass fractions of various powders are as follows: a mixture of copper sulfide, cuprous sulfide, zinc sulfide, tin sulfide, nickel sulfide and other powders, the content of each sulfide is 0.2%; the content of nickel powder is 0.3%; The content of paraffin powder as an external forming agent is 1.2%; the balance is the above-mentioned copper alloy powder containing manganese. The powder mixing time is 2 hours. After the mixing is completed, it is pressed. After the pressing, it is put into a sintering furnace for sintering. The sintering process is: heating from room temperature to the sintering temperature, heating time 2 hours, fully removing the forming agent, and the sintering temperature is 750 ° C. The holding time is 60 minutes, and the sintering atmosphere is a reducing a...

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Abstract

A lead-free free-cutting high-sulfur manganese-containing copper alloy and a manufacturing method thereof. The alloy composition is calculated by mass percentage: copper 52.0%‑95.0%, phosphorus 0.01%‑0.20%, tin 0.01%‑20%, manganese 0.55%‑7.0%, sulfur 0.191%‑1.0%, affinity with sulfur except zinc One or more metals with an affinity lower than the affinity between manganese and sulfur, the sum of their contents ≤ 2.0%, the balance being zinc and unavoidable impurities, among which the metals with an affinity lower than the affinity between manganese and sulfur are nickel and iron except for zinc , tungsten, cobalt, molybdenum, antimony, bismuth and niobium. The copper alloy is manufactured by powder metallurgy. After uniformly mixing alloy powder, sulfide powder and nickel powder, it is pressed and formed, sintered, re-pressed and re-fired to obtain the copper alloy and subjected to thermal processing.

Description

technical field [0001] The invention relates to a metal material and a manufacturing method thereof, in particular to a lead-free free-cutting copper alloy and a manufacturing method thereof. Background technique [0002] Lead brass has excellent cold and hot processing performance, excellent cutting performance and self-lubricating characteristics, and can meet the machining requirements of various shapes of parts. Lead brass was once recognized by the world as an important basic metal material and widely used in civil water supply systems, electronics, automobile and machinery manufacturing and other fields. Due to the widespread use of lead brass, there are a large number of discarded lead brass parts, of which only a small amount is recycled, and many small pieces are discarded as garbage. Discarded lead brass is in contact with the soil, and the lead contained in it enters the soil under the long-term action of rainwater and the atmosphere, thereby polluting the soil a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04
CPCC22C9/05C22C1/0425C22C9/02C22F1/08B22F3/16B22F2003/248B22F2009/0848B22F2998/10B22F2999/00B22F9/082C22C9/04B22F3/02B22F3/10B22F3/17B22F2201/01B22F2201/10B22F2201/02B22F3/12B22F3/20B22F2003/175B22F2003/208
Inventor 黄劲松刘彬李卫陈志永彭韬
Owner HUNAN TERRY NEW MATERIALS COMPANY
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