阅读说明：本技术 一种抗热裂的电缆用铜合金导电材料及其制备方法 (Anti-heat-cracking copper alloy conductive material for cable and preparation method thereof ) 是由 郑家法 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种抗热裂的电缆用铜合金导电材料,由下述重量百分比的原料制成：Ni 0.1wt%-0.2wt%、Cr 0.5wt%-1.2wt%、Ba 0.1wt%-0.5wt%、Mo 0.1wt%-0.2wt%、Ge 0.5wt%-0.9wt%、Mg 0.7wt%-1.3wt%、余量为Cu。本发明的铜合金导电材料具有非常优异的拉伸强度、导电率性能和抗热裂性能。本发明通过研究筛选出特定范围内的Ni、Cr、Ba、Mo、Ge、Mg含量,使得制得的铜合金在不影响拉伸强度和导电率性能基础上大大提高了抗热裂性能,更加满足热加工的实际性能需求。(The invention discloses a heat-cracking-resistant copper alloy conductive material for cables, which is prepared from the following raw materials in percentage by weight: 0.1 to 0.2 weight percent of Ni, 0.5 to 1.2 weight percent of Cr, 0.1 to 0.5 weight percent of Ba, 0.1 to 0.2 weight percent of Mo, 0.5 to 0.9 weight percent of Ge, 0.7 to 1.3 weight percent of Mg, and the balance of Cu. The copper alloy conductive material has excellent tensile strength, conductivity and heat cracking resistance. According to the invention, the contents of Ni, Cr, Ba, Mo, Ge and Mg in a specific range are screened out through research, so that the thermal cracking resistance of the prepared copper alloy is greatly improved on the basis of not influencing the tensile strength and the conductivity, and the actual performance requirement of hot working is further met.)

1. The heat-cracking-resistant copper alloy conductive material for the cable is characterized by being prepared from the following raw materials in percentage by weight:

Ni 0.1wt%-0.2wt%、

Cr 0.5wt%-1.2wt%、

Ba 0.1wt%-0.5wt%、

Mo 0.1wt%-0.2wt%、

Ge 0.5wt%-0.9wt%、

Mg 0.7wt%-1.3wt%、

the balance being Cu.

2. The copper alloy conductive material for the cable with the resistance to the heat cracking of claim 1, which is prepared from the following raw materials in percentage by weight:

Ni 0.15wt%、

Cr 0.9wt%、

Ba 0.3wt%、

Mo 0.15wt%、

Ge 0.7wt%、

Mg 1.0wt%、

the balance being Cu.

3. The copper alloy conductive material for the cable with the resistance to the heat cracking of claim 1, which is prepared from the following raw materials in percentage by weight:

Ni 0.1wt%、

Cr 1.2wt%、

Ba 0.1wt%、

Mo 0.2wt%、

Ge 0.5wt%、

Mg 1.3wt%、

the balance being Cu.

4. The copper alloy conductive material for the cable with the resistance to the heat cracking of claim 1, which is prepared from the following raw materials in percentage by weight:

Ni 0.2wt%、

Cr 0.5wt%、

Ba 0.5wt%、

Mo 0.1wt%、

Ge 0.9wt%、

Mg 0.7wt%、

the balance being Cu.

5. The copper alloy conductive material for a thermal cracking resistant cable according to any one of claims 1 to 4, wherein the preparation method comprises the following steps:

(1) mixing the raw materials according to the using amount, and smelting by using a high-temperature smelting furnace, wherein the temperature of the high-temperature smelting furnace is 730-750 ℃, keeping the temperature fixed, and smelting for 0.5-1 h;

(2) raising the temperature to 1120-1150 ℃, keeping the temperature fixed, and smelting for 1.5-2 h;

(3) the temperature of the smelting furnace is reduced to 710-750 ℃, and the temperature is kept for 1-2 h;

(4) after the alloy ingot is prepared, the alloy ingot is rolled into an alloy rod, and the alloy rod is drawn into a copper alloy wire.

6. The copper alloy conductive material for a cable according to claim 5, wherein the preparation method comprises the following steps:

(1) mixing the raw materials according to the using amount, and then smelting the mixture by using a high-temperature smelting furnace, wherein the temperature of the high-temperature smelting furnace is 730 ℃, keeping the temperature fixed, and smelting for 0.5 h;

(2) raising the temperature to 1120 ℃, keeping the temperature fixed, and smelting for 1.5 h;

(3) cooling the temperature of the smelting furnace to 710 ℃, and preserving the temperature for 2 h;

(4) after the alloy ingot is prepared, the alloy ingot is rolled into an alloy rod, and the alloy rod is drawn into a copper alloy wire.

Technical Field

The invention belongs to the field of metal conductive materials, and particularly relates to a copper alloy conductive material for a cable and a preparation method thereof.

Background

The wire and cable is used as a main carrier of power transmission, is widely applied to the aspects of electrical equipment, lighting circuits, household appliances and the like, and the quality of the wire and cable directly influences the engineering quality and the life and property safety of consumers.

At present, some technical solutions of copper alloy conductive materials for cables have been disclosed in the prior art, for example, chinese patent application with publication number CN 108133765a discloses a copper alloy conductive material for cables, which is made from the following raw materials in percentage by weight: 0.3 to 0.7 weight percent of Ni, 0.1 to 0.2 weight percent of Cr, 0.1 to 0.5 weight percent of Ba, 0.3 to 0.7 weight percent of Mo, 0.1 to 0.3 weight percent of Ge, 0.1 to 0.3 weight percent of Mg, and the balance of Cu. The copper alloy conductive material for the cable has excellent tensile strength and conductivity performance, the tensile strength is as high as 346MPa, and the conductivity is as high as 94% IACS. However, the hot workability of the copper alloy is generally insufficient, and the hot cracking resistance is particularly insufficient, and there is room for further improvement. Therefore, the research of the copper alloy conductive material for the cable, which has better heat cracking resistance and does not influence the tensile strength and the conductivity performance, has important practical significance.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a copper alloy conductive material for a cable with excellent tensile strength, conductivity performance and thermal cracking resistance and a preparation method thereof. In order to realize the purpose, the invention adopts the following technical scheme:

a copper alloy conductive material for a heat-cracking-resistant cable is prepared from the following raw materials in percentage by weight:

Ni 0.1wt%-0.2wt%、

Cr 0.5wt%-1.2wt%、

Ba 0.1wt%-0.5wt%、

Mo 0.1wt%-0.2wt%、

Ge 0.5wt%-0.9wt%、

Mg 0.7wt%-1.3wt%、

the balance being Cu.

Preferably, the heat-cracking-resistant copper alloy conductive material for the cable is prepared from the following raw materials in percentage by weight:

Ni 0.15wt%、

Cr 0.9wt%、

Ba 0.3wt%、

Mo 0.15wt%、

Ge 0.7wt%、

Mg 1.0wt%、

the balance being Cu.

Preferably, the heat-cracking-resistant copper alloy conductive material for the cable is prepared from the following raw materials in percentage by weight:

Ni 0.1wt%、

Cr 1.2wt%、

Ba 0.1wt%、

Mo 0.2wt%、

Ge 0.5wt%、

Mg 1.3wt%、

the balance being Cu.

Preferably, the heat-cracking-resistant copper alloy conductive material for the cable is prepared from the following raw materials in percentage by weight:

Ni 0.2wt%、

Cr 0.5wt%、

Ba 0.5wt%、

Mo 0.1wt%、

Ge 0.9wt%、

Mg 0.7wt%、

the balance being Cu.

The invention relates to a preparation method of a heat-cracking-resistant copper alloy conductive material for cables, which comprises the following steps:

(1) mixing the raw materials according to the using amount, and smelting by using a high-temperature smelting furnace, wherein the temperature of the high-temperature smelting furnace is 730-750 ℃, keeping the temperature fixed, and smelting for 0.5-1 h;

(2) raising the temperature to 1120-1150 ℃, keeping the temperature fixed, and smelting for 1.5-2 h;

(3) the temperature of the smelting furnace is reduced to 710-750 ℃, and the temperature is kept for 1-2 h;

(4) after the alloy ingot is prepared, the alloy ingot is rolled into an alloy rod, and the alloy rod is drawn into a copper alloy wire.

Preferably, the preparation method of the heat-cracking-resistant copper alloy conductive material for the cable comprises the following steps:

(1) mixing the raw materials according to the using amount, and then smelting the mixture by using a high-temperature smelting furnace, wherein the temperature of the high-temperature smelting furnace is 730 ℃, keeping the temperature fixed, and smelting for 0.5 h;

(2) raising the temperature to 1120 ℃, keeping the temperature fixed, and smelting for 1.5 h;

(3) cooling the temperature of the smelting furnace to 710 ℃, and preserving the temperature for 2 h;

(4) after the alloy ingot is prepared, the alloy ingot is rolled into an alloy rod, and the alloy rod is drawn into a copper alloy wire.

Compared with the prior art, the invention has the beneficial effects that: the copper alloy conductive material has excellent tensile strength, conductivity and heat cracking resistance. According to the invention, the contents of Ni, Cr, Ba, Mo, Ge and Mg in a specific range are screened out through research, so that the thermal cracking resistance of the prepared copper alloy is greatly improved on the basis of not influencing the tensile strength and the conductivity performance, the actual performance requirement of hot working is met, and an unexpected effect is achieved, which is beyond the expectation of technicians in the field.

Detailed Description

For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to illustrate further features and advantages of the invention, and not to limit the scope of the claims.