Drawing die for tinned copper wire wrapped with diamond metal sintered body and preparation method thereof

A technology of metal sintering and tinned copper wire, applied in the direction of drawing dies, etc., can solve the problems of large deviation in service life, large brittleness, easy cracking, etc., and achieve the effect of increasing the number of repairs, ensuring strength, and improving toughness

Active Publication Date: 2016-04-20
ANHUI ZHENXING WIRE DRAWING DIES
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The drawing die for tinned copper wire has high requirements on the surface quality of copper wire, so the core of the drawing die is made of diamond. Diamond has the characteristics of high hardness and good wear resistance, and the surface finish of the drawn wire is very high. Due to natural diamond It has anisotropy in structure, which leads to anisotropy in hardness, uneven wear of die holes, uneven products, large deviation in service life, high brittleness, and easy cracking in the wire drawing process. For this reason, Reducing the scrap rate of wire drawing dies has become the research direction of wire drawing die industry

Method used

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  • Drawing die for tinned copper wire wrapped with diamond metal sintered body and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] The preparation method of the drawing die of the present embodiment comprises the following steps:

[0022] (1) Put part of the mixed metal powder into the mold shell 1, cover the gland 5, compact it at room temperature on the sintering press, and take out the gland 5;

[0023] (2) Put a diamond particle 3 into the center of the metal powder compacted in step (1); the diamond particle 3 is 0.02 carats to 0.03 carats, and the diameter of the effective overlapping area is 0.6 mm;

[0024] (3) Put the remaining mixed metal powder into the mold shell 1 again, cover the gland 5, put it into a sintering press for high-temperature sintering and compaction; heat the mold shell 1 added with the mixed metal powder, and heat it while heating Apply pressure, heat to 900-1100°C and keep the temperature constant, heat to the set temperature and pressurize to 4.5MPa and then keep the pressure constant, the heating and pressing time is 3-5 minutes in total;

[0025] (4) Hole the cente...

Embodiment 2

[0030] The mixed metal powder of this embodiment includes Al60, Ni30%, Ti8%, Fe1%, Cl%. Other implementations are the same as in Example 1.

Embodiment 3

[0032] The mixed metal powder of this embodiment includes Al55%, Ni35%, Ti5%, Fe4%, Cl%. Other implementations are the same as in Example 1.

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Abstract

The invention discloses a wire-drawing die for a tinned copper wire covered with a diamond metal sintering body and a preparation method of the wire-drawing die. The preparation method comprises the following steps of placing part of mixed metal powder into a die shell, and compacting the die shell under the normal temperature; placing a diamond particle into the center of the compacted metal powder body, placing the surplus mixed metal powder into the die shell, and sintering and compacting at high temperature; and carrying out punching on the center of the die shell after sintering and compacting to manufacture the wire-drawing die, wherein the mixed metal powder comprises 45%-60% of Al,30%-40% of Ni, 5%-10% of Ti, 1%-4% of Fe, and 1%-3% of C. The wire-drawing die disclosed by the invention has the advantages that metal particles such as nickel and titanium in different contents are added in an aluminium base and can coat a smashing small particle diamond material, so that the strength and rigidity of diamond are guaranteed when the die is in use, and the tenacity is also improved; a certain titanium element is added in the metal powder body by adopting a titanium alloy die shell, and the metal powder body and the die shell can achieve the interatomic combination in high sintering and pressing.

Description

technical field [0001] The invention relates to a wire drawing die for tinned copper wire, in particular to a wire drawing die for tinned copper wire wrapped with a diamond metal sintered body and a preparation method thereof. Background technique [0002] The drawing die for tinned copper wire has high requirements on the surface quality of copper wire, so the core of the drawing die is made of diamond. Diamond has the characteristics of high hardness and good wear resistance, and the surface finish of the drawn wire is very high. Due to natural diamond It has anisotropy in structure, which leads to anisotropy in hardness, uneven wear of die holes, uneven products, large deviation in service life, high brittleness, and easy cracking in the wire drawing process. For this reason, Reducing the scrap rate of wire drawing dies has become a research direction in the wire drawing die industry. Contents of the invention [0003] The purpose of the present invention is to overcom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C3/02B22F3/14
Inventor 钱正兴
Owner ANHUI ZHENXING WIRE DRAWING DIES
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