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Free-cutting bismuth-nickel copper alloy material and preparation method thereof

A nickel-copper alloy and easy-cutting technology, which is applied in the field of free-cutting bismuth-nickel-copper alloy materials and its preparation, can solve the problems of poor electrical conductivity, short service life, and low high-temperature strength, so as to improve corrosion resistance, improve cutting performance, The effect of uniform alloy quality

Inactive Publication Date: 2014-04-30
CHUZHOU UNIV
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  • Description
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Problems solved by technology

At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending Poor processing performance, easy to break; heavy quality, difficult construction; can not meet market requirements

Method used

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Embodiment Construction

[0013] A free-cutting bismuth-nickel-copper alloy material, which contains chemical element components and mass percentages: manganese 2.2-2.4, silicon 0.3-0.4, nickel 8.5-10.2, Hf0.08-0.12, Bi0.35-0.40, The amount is copper.

[0014] The production method of described free-cutting bismuth-nickel-copper alloy material is:

[0015] (1) Prepare pure copper and scrap copper as the source of copper matrix in a ratio of 1:0.5, add pure copper into the furnace to melt, remove impurities, deoxidize, use refining agent for one-time refining, add alloy components for alloying, and then add Scrap copper melting, adding refining agent for secondary refining, testing and adjusting the content of chemical elements to pass, casting, post-casting heat treatment, etc.;

[0016] (2) The batch order of alloying elements into the furnace during the alloying process is: (1) nickel; (2) silicon, bismuth; (3) other remaining components; the time interval between each batch of elements is 22 minute...

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Abstract

The invention relates to a free-cutting bismuth-nickel copper alloy material which contains the following chemical components in percentage by mass: 2.2-2.4% of manganese, 0.3-0.4% of silicon, 8.5-10.2% of nickel, 0.08-0.12% of Hf, 0.35-0.40% of Bi and the balance of copper. The bismuth, silicon, Hf, manganese and other elements are added to enhance the wear resistance and toughness, obviously improve the cutting characteristic, save the cutting tool and cutting time, enhance the corrosion resistance and avoid lead pollution; and by reasonably controlling the after-casting treatment temperature and using waste copper as the raw material, the core hardness is basically consistent with the surface hardness, and the alloy quality is uniform. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, the oxide inclusion content is at level 2 or so, and the yield is obviously enhanced.

Description

technical field [0001] The invention relates to the field of manufacturing metal alloy materials, in particular to a free-cutting bismuth-nickel-copper alloy material and a preparation method thereof. Background technique [0002] Copper is widely used because of its good electrical conductivity, plasticity and corrosion resistance. Adding elements such as aluminum, nickel, manganese, tin, silicon, and lead to copper alloy can improve the performance of copper and be used in different places. At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending The processing performance is poor and it is easy to break; the quality is heavy and the construction is difficult; it cannot meet the market...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02C22C1/06C22F1/08
Inventor 丁健倪受春林其斌葛浩夏岩磊杨玭
Owner CHUZHOU UNIV
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