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Method for preparing fine grain CuNi45 alloy wires

A technology of alloy wire rod and fine grain is applied in the field of preparing fine grain CuNi45 alloy wire rod, which can solve the problems of complex equipment, high preparation cost of CuNi45 alloy wire rod and long cycle, and achieve simple equipment, fine grain size and low cost. Effect

Inactive Publication Date: 2012-11-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing fine-grained CuNi45 alloy wire rod, which solves the problems of high preparation cost, complex equipment and long cycle of preparing CuNi45 alloy wire rod by the existing method, and at the same time, the microelements in the wire rod structure are refined by adding trace elements grains, enhancing the thermoelectric properties of the material

Method used

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  • Method for preparing fine grain CuNi45 alloy wires
  • Method for preparing fine grain CuNi45 alloy wires
  • Method for preparing fine grain CuNi45 alloy wires

Examples

Experimental program
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Effect test

Embodiment 1

[0044]According to the mass percentage of the chemical composition of the CuNi45 alloy is Cu:Ni=55%:45%, weigh the electrolytic pure Ni powder with a particle size of 50-200 mesh and a purity of 99.9% and a T2 copper rod with a purity higher than 99.9%, and weigh it. Put the measured Ni powder and Cu rods into a 30ml corundum crucible in turn, then place the crucible in a high-temperature vacuum sintering furnace, first evacuate the furnace to ensure that the vacuum in the furnace is less than 5Pa; then heat the furnace , control the heating rate to 20°C / min. When the temperature in the furnace reaches 900°C, continue to heat up at a heating rate of 10°C / min. The final melting temperature is 1300-1450°C. After holding for 20-70 minutes, cool down naturally with the furnace To room temperature, the alloy is not subjected to any stress during sintering. Then the alloy is machined, the skin is removed by car, and an appropriate amount of alloy block is intercepted with a hand saw...

Embodiment 2

[0046] According to the mass percentage of Ti:Ni=1.0%:45%, the electrolytic pure Ni powder with a particle size of 50-200 mesh and a purity of 99.9% and the Ti powder with a particle size of 200-300 mesh and a purity of 99.99% were weighed. Then Ni powder and Ti powder are mixed, and the powder mixing time is 3h-5h. Then put the mixed powder and Cu rod into a 30ml corundum crucible in turn. The powder should be loosely packed in the corundum crucible, and then the crucible is placed in a high-temperature vacuum sintering furnace. The vacuum degree is less than 5Pa; then heat the furnace, and control the heating rate to 20°C / min. When the temperature in the furnace reaches 900°C, continue to heat up at a heating rate of 10°C / min, and the final melting temperature is 1300-1450°C , After 20-70 minutes of heat preservation, it is naturally cooled to room temperature with the furnace, and the alloy is not subjected to any pressure during the sintering process. Then the alloy is ma...

Embodiment 3

[0049] According to the mass percentage of B:Ni=0.1%:45%, weigh electrolytically pure Ni powder with a particle size of 50-200 mesh and a purity of 99.9% and B powder with a particle size of 200-300 mesh and a purity of 99.99%. Then mix B powder and Ti powder, and the powder mixing time is 3h-5h. Then put the mixed powder and Cu rod into a 30ml corundum crucible in turn. The powder should be loosely packed in the corundum crucible, and then the crucible is placed in a high-temperature vacuum sintering furnace. The vacuum degree is less than 5Pa; then heat the furnace, and control the heating rate to 20°C / min. When the temperature in the furnace reaches 900°C, continue to heat up at a heating rate of 10°C / min, and the final melting temperature is 1300-1450°C , After 20-70 minutes of heat preservation, it is naturally cooled to room temperature with the furnace, and the alloy is not subjected to any pressure during the sintering process. Then the W-Ti alloy is machined, the ski...

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Abstract

The invention discloses a method for preparing fine grain CuNi45 alloy wires, which comprises the following steps of: weighing 1.0% to 3% of Ti powder, and 45% of Ni powder, or 0.1% to 0.3% of B powder and 45% of Ni powder, or 1.0% to 3 % of CeO2 powder and 45% of Ni powder, and the balance of copper bars in percentage by mass, wherein the sum of the mass percents of all the components is 100%; mixing the weighed powder for three to five hours; placing the mixed powder into a crucible, placing the measured copper bars into the mixed powder, and placing the crucible into a high temperature vacuum sintering furnace and carrying out melting to obtain a CuNi45 alloy cast ingot; carrying out machining and surface skin turning on the CuNi45 alloy cast ingot to remove impurities, and then cutting the CuNi45 alloy cast ingot into alloy blocks; and placing the alloy blocks into a quartz funnel, placing the quartz funnel into a graphite crucible, then placing the graphite crucible into a high temperature vacuum sintering furnace and carrying out secondary melting to obtain the fine grain CuNi45 alloy wires. The method has the advantages of low cost, short consuming time, simple process, simple equipment, and easiness of operation.

Description

technical field [0001] The invention belongs to the technical field of metallurgical preparation, and in particular relates to a method for preparing fine-grain CuNi45 alloy wire. Background technique [0002] CuNi45 alloy is one of the main materials for preparing thermocouples and thermocouple compensation wire materials. At present, the main preparation methods of CuNi45 alloy wire are drawing method and extrusion method. The equipment and processes required by these two methods are complex and time-consuming, so it is of practical significance to develop a preparation method of CuNi45 alloy wire with low cost, simple process and superior performance. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing fine-grained CuNi45 alloy wire rod, which solves the problems of high preparation cost, complex equipment and long cycle of preparing CuNi45 alloy wire rod by the existing method, and at the same time, the microele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/02
Inventor 邹军涛郑林梁淑华王献辉
Owner XIAN UNIV OF TECH