阅读说明：本技术 仪表用镍铬基精密电阻合金及其制备方法 (Nickel-chromium-based precision resistance alloy for instruments and preparation method thereof ) 是由 卢金祥 于 2019-04-20 设计创作，主要内容包括：本发明公开了本发明包括一种仪表用镍铬基精密电阻合金,由以下各重量份组分制备而成：Ni：24-26份,Cr：27-30份,Cu：16-18份,Mn：1.2-1.5份,Si：0.2-0.5份,Al：0.02-0.04份。其组分配比合理、加工制造容易、制备成本低,且疲劳强度和弹性应变极限大、焊接性能好、加工性能好,适于工业化生产。(The invention discloses a nickel-chromium-based precision resistance alloy for an instrument, which is prepared from the following components in parts by weight: ni: 24-26 parts of Cr: 27-30 parts of Cu: 16-18 parts, Mn: 1.2-1.5 parts of Si: 0.2-0.5 parts of Al: 0.02-0.04 portion. The welding material has the advantages of reasonable component proportion, easy processing and manufacturing, low preparation cost, large fatigue strength and elastic strain limit, good welding performance and good processing performance, and is suitable for industrial production.)

1. The nickel-chromium-based precision resistance alloy for the instrument is characterized by being prepared from the following components in parts by weight: ni: 24-26 parts of Cr: 27-30 parts of Cu: 16-18 parts, Mn: 1.2-1.5 parts of Si: 0.2-0.5 parts of Al: 0.02-0.04 portion.

2. The nickel-chromium-based precision resistance alloy for the instrument as claimed in claim 1, which is prepared from the following components in parts by weight: ni: 25-26 parts of Cr: 28-30 parts of Cu: 17-18 parts, Mn: 1.3-1.5 parts of Si: 0.3-0.5 parts of Al: 0.03 to 0.04 portion.

3. The nickel-chromium-based precision resistance alloy for the instrument as claimed in claim 2, which is prepared from the following components in parts by weight: ni: 25 parts of Cr: 29 parts, Cu: 17 parts, Mn: 1.4 parts, Si: 0.4 part, Al: 0.03 part.

4. A method for preparing the nickel-chromium-based precision resistance alloy for the meter according to any one of claims 1 to 3, comprising:

s101, cleaning Ni, Cr, Cu, Mn, Si and Al by using a 20-25% HCl aqueous solution, and then cleaning by using a 4-6% HCl aqueous solution for later use; baking the crucible at the temperature of 1000-;

s102, adding Ni and Cr into a crucible, placing the crucible into a vacuum furnace, and vacuumizing to 5x10^-1-5x10^-2Torr, heating to 1560-; the vacuum degree of the vacuum furnace is pumped to 1-5x10^-2-5x10^-3Torr into Ni, Cr alloyAdding Cu into the melt, heating to 1950-; cooling to 1860 and 1950 deg.C at 24-26 deg.C/min, and pumping the vacuum degree of the vacuum furnace to 5x10^-3Adding Si into the Ni, Cr and Cu alloy melt, stirring, keeping the temperature for 15-20min, continuing stirring, and adding Mn and Al under the argon protective atmosphere;

s103, pouring the Ni, Cr, Cu, Mn, Si and Al alloy melt into an ingot mold at the temperature of 1560-1860 ℃, and naturally cooling to obtain the nickel-chromium-based precision resistance alloy for the instrument.

5. The method according to claim 4, wherein in step S101, Ni, Cr, Cu, Mn, Si, Al are washed with 23% HCl aqueous solution and then washed with 5% HCl aqueous solution for use.

Technical Field

The invention relates to a resistance alloy, in particular to a nickel-chromium-based precision resistance alloy for an instrument and a preparation method thereof.

Background

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the nickel-chromium-based precision resistance alloy for the instrument, which has the advantages of reasonable component proportion, easiness in processing and manufacturing, low preparation cost, large fatigue strength and elastic strain limit, good welding performance and good processing performance, and is suitable for industrial production.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a nickel-chromium-based precision resistance alloy for instruments is prepared from the following components in parts by weight: ni: 24-26 parts of Cr: 27-30 parts of Cu: 16-18 parts, Mn: 1.2-1.5 parts of Si: 0.2-0.5 parts of Al: 0.02-0.04 portion.

Preferably, the composition is prepared from the following components in parts by weight: ni: 25-26 parts of Cr: 28-30 parts of Cu: 17-18 parts, Mn: 1.3-1.5 parts of Si: 0.3-0.5 parts of Al: 0.03 to 0.04 portion.

Preferably, the composition is prepared from the following components in parts by weight: ni: 25 parts of Cr: 29 parts, Cu: 17 parts, Mn: 1.4 parts, Si: 0.4 part, Al: 0.03 part.

The invention also comprises a preparation method of the nickel-chromium-based precision resistance alloy for the instrument, which comprises the following steps:

s101, cleaning Ni, Cr, Cu, Mn, Si and Al by using a 20-25% HCl aqueous solution, and then cleaning by using a 4-6% HCl aqueous solution for later use; baking the crucible at the temperature of 1000-;

s102, adding Ni and Cr into a crucible, placing the crucible into a vacuum furnace, and vacuumizing to 5x10^-1-5x10^-2Torr, heating to 1560-; the vacuum degree of the vacuum furnace is pumped to 1-5x10^-2-5x10^-3Torr, adding Cu into the Ni and Cr alloy melt, heating to 1950-; cooling to 1860 and 1950 deg.C at 24-26 deg.C/min, and pumping the vacuum degree of the vacuum furnace to 5x10^-3Adding Si into the Ni, Cr and Cu alloy melt, stirring, keeping the temperature for 15-20min, continuing stirring, and adding Mn and Al under the argon protective atmosphere;

s103, pouring the Ni, Cr, Cu, Mn, Si and Al alloy melt into an ingot mold at the temperature of 1560-1860 ℃, and naturally cooling to obtain the nickel-chromium-based precision resistance alloy for the instrument.

Further, in step S101, Ni, Cr, Cu, Mn, Si, and Al are washed with 23% HCl aqueous solution, and then washed with 5% HCl aqueous solution for standby.

Compared with the prior art, the invention has the beneficial effects that: the welding material has the advantages of reasonable component proportion, easy processing and manufacturing, low preparation cost, large fatigue strength and elastic strain limit, good welding performance and good processing performance, and is suitable for industrial production.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

The invention comprises a nickel-chromium-based precision resistance alloy for instruments, which is prepared from the following components in parts by weight: ni: 24-26 parts of Cr: 27-30 parts of Cu: 16-18 parts, Mn: 1.2-1.5 parts of Si: 0.2-0.5 parts of Al: 0.02-0.04 portion.

Preferably, the composition is prepared from the following components in parts by weight: ni: 25-26 parts of Cr: 28-30 parts of Cu: 17-18 parts, Mn: 1.3-1.5 parts of Si: 0.3-0.5 parts of Al: 0.03 to 0.04 portion. Further, the feed additive is prepared from the following components in parts by weight: ni: 25 parts of Cr: 29 parts, Cu: 17 parts, Mn: 1.4 parts, Si: 0.4 part, Al: 0.03 part.

The invention also comprises a preparation method of the nickel-chromium-based precision resistance alloy for the instrument, which comprises the following steps:

s101, cleaning Ni, Cr, Cu, Mn, Si and Al by using a 20-25% HCl aqueous solution, and then cleaning by using a 4-6% HCl aqueous solution for later use; baking the crucible at the temperature of 1000-;

s102, adding Ni and Cr into a crucible, placing the crucible into a vacuum furnace, and vacuumizing to 5x10^-1-5x10^-2Torr, heating to 1560-; the vacuum degree of the vacuum furnace is pumped to 1-5x10^-2-5x10^-3Torr, adding Cu into the Ni and Cr alloy melt, heating to 1950-; cooling to 1860 and 1950 deg.C at 24-26 deg.C/min, and pumping the vacuum degree of the vacuum furnace to 5x10^-3Adding Si into the Ni, Cr and Cu alloy melt, stirring, keeping the temperature for 15-20min, continuing stirring, and adding Mn and Al under the argon protective atmosphere;

s103, pouring the Ni, Cr, Cu, Mn, Si and Al alloy melt into an ingot mold at the temperature of 1560-1860 ℃, and naturally cooling to obtain the nickel-chromium-based precision resistance alloy for the instrument.

Further, in step S101, Ni, Cr, Cu, Mn, Si, and Al are washed with 23% HCl aqueous solution, and then washed with 5% HCl aqueous solution for standby.