CN101561322A - Dispersion strengthening platinum/rhodium13-platinum thermocouple wires and production method thereof - Google Patents
Dispersion strengthening platinum/rhodium13-platinum thermocouple wires and production method thereof Download PDFInfo
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- CN101561322A CN101561322A CNA2009100276858A CN200910027685A CN101561322A CN 101561322 A CN101561322 A CN 101561322A CN A2009100276858 A CNA2009100276858 A CN A2009100276858A CN 200910027685 A CN200910027685 A CN 200910027685A CN 101561322 A CN101561322 A CN 101561322A
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Abstract
The invention discloses dispersion strengthening platinum/rhodium13-platinum thermocouple wires, comprising a cathode and an anode; the thermocouple wires are characterized in that the anode contain ingredients according to the following weight percentage: 12.87-13% of rhodium; 0-0.5% of zirconium; 0-0.5% of yttrium; 0-0.5% of calcium; 0-0.5% of lanthanum; 0-0.5% of titanium; the excess is platinum; the cathode contains ingredients according to the following weight percentage: 0-0.5% of zirconium; 0-0.5% of yttrium; 0-0.5% of calcium; 0-0.5% of lanthanum; 0-0.5% of titanium; the allowance platinum. The production method of dispersion strengthening platinum/rhodium13-platinum thermocouple wires comprise mixing ingredients, vacuum melting, placing and rolling, oxidizing, combined machining and drawing forming. The dispersion strengthening platinum/rhodium13-platinum thermocouple wires of the invention enjoy long service life, high adaptive temperature, strong contamination resistance and low use cost.
Description
Technical field
The invention belongs to the metal material technical field, particularly relate to a kind of dispersion intensifying platinum rhodium
13-platinum thermocouple silk and production method thereof.
Background technology
Thermocouple wire is used for making various temperature elements, is widely used in the temperature survey in each field such as steel industry, glass industry, and a large amount of uses generally is the platinum rhodium in the prior art
13-platinum thermocouple silk, its anodal platinum rhodium
13Nominal composition is rhodium Rh13%, and platinum Pt is a surplus, the platinum name content 100% of negative pole.This thermocouple wire can use under the high-temperature oxydation condition, thermometric in 300～1400 ℃ of temperature-measuring ranges, but the easy alligatoring of platinode crystal grain of this thermocouple wire, and contamination resistance is poor, causes the thermoelectrical potential instability, and serviceable life is shorter, and cost is higher.
Summary of the invention
The objective of the invention is at weak point of the prior art, a kind of long service life, adaptive temperature height, contamination resistance is strong, use cost is low dispersion intensifying platinum rhodium are provided
13-platinum thermocouple silk and production method thereof.
Purpose of the present invention realizes by following technical scheme, described dispersion intensifying platinum rhodium
13-platinum thermocouple silk comprises positive pole and negative pole, it is characterized in that: described positive pole comprises that each component and weight percent content thereof are: rhodium: 12.87～13%; Zirconium: 0～0.5%; Yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is surplus; Described negative pole comprises that each component and weight percent content thereof are: zirconium: 0～0.5%, and yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is surplus.
In thermocouple metal, the oxygenation efficiency of adding metal is greater than 99.5% with oxide nano-particles form even dispersion in described zirconium, yttrium, calcium, lanthanum, the titanium one or more.
Described dispersion intensifying platinum rhodium
13-platinum thermocouple silk production method comprises the steps:
(1) batching: according to rhodium: 12.87～13%; Zirconium: 0～0.5%; Yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is the anodal raw material of preparation of the percentage by weight of surplus; According to zirconium: 0～0.5%, yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is the proportioning preparation negative pole raw material of the percentage by weight of surplus;
(2) vacuum melting: the above-mentioned anodal raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1860～1900 ℃ the condition, obtains positive grid alloy; The above-mentioned negative pole raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1770～1800 ℃ the condition, obtains the negative pole alloy;
(3) sheet is rolled in cast: above-mentioned liquid alloy through vacuum melting is cast in respectively forms ingot casting in the mold; On milling train, roll out the positive grid alloy sheet material then, negative pole alloy sheet material;
(4) oxidation processes: with above-mentioned positive grid alloy sheet material under 800～1400 ℃ through 60～150 hours oxidation processes, obtain anodal strengthened dispersion alloy thin slice; With above-mentioned negative pole alloy sheet material under 800～1400 ℃ through 80～180 hours oxidation processes, obtain negative pole strengthened dispersion alloy thin slice;
(5) Compound Machining: above-mentioned thousands of thin slices are compound, processing, realize the material structure fiberization, form positive pole and negative pole bar;
(6) drawing and forming: above-mentioned bar is carried out stretch processing, be drawn into required size.
As a further improvement on the present invention, described mold is a water cooled copper mould.
The present invention compares with thermocouple wire of the prior art, by in zirconium, yttrium, calcium, lanthanum, the titanium one or more are added platinum rhodiums
13In platinode, and with oxide nano-particles form even dispersion in alloy, obtain the strengthened dispersion alloy thin slice, through Compound Machining, realize the material structure fiberization, make it have excellent high-temperature characteristic and inoxidizability, can under 300～1700 ℃ of temperature-measuring ranges and oxidizing condition, safety use for a long time; Dispersion intensifying platinum rhodium when at high temperature bearing with equal stress
13Rupture life be common platinum rhodium
13More than 10 times, the rupture life of dispersion intensifying platinum is more than 100 times of common platinum; Diameter is thinner, and creep resisting ability is strong; The antipollution corrosive power is stronger, and thermoelectrical potential is stable; Be common platinum rhodium serviceable life
132～4 times of-platinum thermocouple silk have reduced cost significantly, have improved economic benefit.
Embodiment
The present invention is described further below in conjunction with a series of specific embodiments.
1, the anodal dispersion intensifying platinum rhodium of thermocouple wire
13:
Batching: according to rhodium: 12.87～13%; Zirconium: 0～0.5%; Yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is that the percentage by weight of surplus is prepared anodal raw material, in above-mentioned ratio range, and the content of conversion zirconium, yttrium, calcium, lanthanum, titanium, rhodium, platinum.
Vacuum melting: the above-mentioned raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1860～1900 ℃ the condition, obtains positive grid alloy;
Sheet is rolled in cast: above-mentioned liquid alloy through vacuum melting is cast in respectively forms ingot casting in the water cooled copper mould; On milling train, roll out the positive grid alloy sheet material then;
Oxidation processes: with above-mentioned positive grid alloy sheet material under 800～1400 ℃ through 60～150 hours oxidation processes, obtain anodal strengthened dispersion alloy thin slice;
Compound Machining: above-mentioned thousands of thin slices are compound, processing, realize the material structure fiberization, form anodal bar;
Drawing and forming: above-mentioned bar is carried out stretch processing, be drawn into required size;
High-temperature behavior test: contrast anodal dispersion intensifying platinum rhodium of the present invention
13Thermo wires and common platinum rhodium
13Rupture life when thermo wires at high temperature bears with equal stress;
Thermopower test: every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature should meet the requirement of GB/T 1598.
These a series of embodiment adopt identical production method, only the proportioning of each component in the conversion raw material.
Embodiment one: Pt 87.0%, Rh13.0%.
Technical feature: rupture life when at high temperature bearing and common platinum rhodium with equal stress
13Thermo wires is suitable; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T1598.
Embodiment two: Pt86.826%, Rh12.974%, Zr0.1%, Y0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment three: Pt 86.652%, Rh12.948%, Ti0.2%, Y0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 16 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment four: Pt 86.478%, Rh12.922%, Zr0.3%, Ca0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 14 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment five: Pt 86.304%, Rh12.896%, Zr0.4%, La0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment six: Pt 86.13%, Rh12.87%, Zr0.5%, Ca0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 17 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment seven: Pt86.913%, Rh12.987%, Zr0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 14 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment eight: Pt 86.826%, Rh12.974%, Ti0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature met the requirement of GB/T 1598.
Embodiment nine: Pt 86.739%, Rh12.961%, Zr0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 16 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment ten: Pt 86.652%, Rh12.948%, Ti0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 16 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 11: Pt 86.565%, Rh12.935%, Zr0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 14 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 12: Pt86.913%, Rh12.987%, La0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 16 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 13: Pt 86.826%, Rh12.974%, Y0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 14: Pt 86.739%, Rh12.961%, Ca0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 18 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 15: Pt 86.652%, Rh12.948%, Y0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 14 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 16: Pt 86.565%, Rh12.935%, La0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 17 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 17: Pt86.826%, Rh12.974%, Zr0.1%, Ti0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 18: Pt 86.652%, Rh12.948%, Ti0.1%, Y0.2%, La0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 16 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 19: Pt 86.478%, Rh12.922%, Zr0.2%, Ca0.2%, La0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 14 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 20: Pt 86.304%, Rh12.896%, Zr0.1%, La0.3%, Ca0.2%, Y0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 15 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 21: Pt 86.13%, Rh12.87%, Zr0.2%, Ca0.3%, La0.3%, Ti0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is common platinum rhodium
13About 17 times of thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
2, thermocouple wire negative pole dispersion intensifying platinum:
Batching: according to zirconium: 0～0.5%, yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is the proportioning preparation negative pole raw material of the percentage by weight of surplus, the content of conversion zirconium, yttrium, calcium, lanthanum, titanium, platinum;
Vacuum melting: the above-mentioned negative pole raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1770～1800 ℃ the condition, obtains the negative pole alloy;
Sheet is rolled in cast: above-mentioned liquid alloy through vacuum melting is cast in respectively forms ingot casting in the mold; On milling train, roll out negative pole alloy sheet material then;
Oxidation processes: with above-mentioned negative pole alloy sheet material under 800～1400 ℃ through 80～180 hours oxidation processes, obtain negative pole strengthened dispersion alloy thin slice;
Compound Machining: above-mentioned thousands of thin slices are compound, processing, realize the material structure fiberization, form the negative pole bar;
Drawing and forming: above-mentioned bar is carried out stretch processing, be drawn into required size.
High-temperature behavior test: rupture life when contrasting negative pole dispersion intensifying platinum thermo wires of the present invention and common platinum thermo wires and at high temperature bearing with equal stress;
Thermopower test: every volume thermo wires, when the temperature of reference edge was 0 ℃, the thermopower that records in the different tests temperature should meet the requirement of GB/T 1598.
Embodiment one: Pt 100%.
Technical feature: the rupture life when at high temperature bearing with equal stress is suitable with common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment two: Pt99.8%, Ti0.1%, Y0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 116 times of platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment three: Pt 99.6%, Zr0.2%, Y0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 118 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment four: Pt 99.4%, Zr0.3%, Ca0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 120 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment five: Pt 99.2%, Zr0.4%, Y0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 123 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment six: Pt 99.0%, Zr0.5%, La0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 125 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment seven: Pt99.9%, Zr0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 134 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment eight: Pt 99.8%, Ti0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 128 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment nine: Pt 99.7%, Zr0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 119 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment ten: Pt 99.6%, Ti0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 130 times of platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 11: Pt 99.5%, Zr0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 135 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 12: Pt99.9%, Y0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 129 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 13: Pt 99.8%, Ca0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 108 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 14: Pt 99.7%, La0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 110 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 15: Pt 99.6%, Y0.4%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 128 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 16: Pt 99.5%, La0.5%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 140 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 17: Pt99.8%, Ti0.1%, Y0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 116 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 18: Pt 99.6%, Zr0.1%, Y0.2%, La0.1%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 118 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 19: Pt 99.4%, Zr0.2%, Ca0.2%, Y0.2%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 120 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 20: Pt 99.2%, Zr0.3%, Y0.1%, La0.1%, Ca0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 123 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
Embodiment 21: Pt 99.0%, Zr0.25%, La0.15%, Y0.1%, Ti0.2%, Ca0.3%.
Technical feature: the rupture life when at high temperature bearing with equal stress is about 125 times of common platinum thermo wires; Every volume thermo wires, when reference junction temperature is 0 ℃, the thermopower that records in the different tests temperature meets the requirement of GB/T 1598.
The thermocouple wire of employing technical solution of the present invention manufacturing has high temperature resistant, anti-oxidant, creep resistant, and antipollution, Anticorrosive, thermo-electromotive force is stable, the advantages such as good welding performance, and temperature-measuring range is big, reaches as high as 1700 ℃, And the thermo wires diameter is thinner.
Claims (4)
1, a kind of dispersion intensifying platinum rhodium
13-platinum thermocouple silk comprises positive pole and negative pole, it is characterized in that: described positive pole comprises that each component and weight percent content thereof are: rhodium: 12.87～13%; Zirconium: 0～0.5%; Yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is surplus; Described negative pole comprises that each component and weight percent content thereof are: zirconium: 0～0.5%, and yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is surplus.
2, dispersion intensifying platinum rhodium according to claim 1
13-platinum thermocouple silk, its feature also is: in thermocouple metal, the oxygenation efficiency of adding metal is greater than 99.5% with oxide nano-particles form even dispersion for one or more in described zirconium, yttrium, calcium, lanthanum, the titanium.
3, a kind of dispersion intensifying platinum rhodium
13The production method of-platinum thermocouple silk is characterized in that: comprise the steps:
(1) batching: according to rhodium: 12.87～13%; Zirconium: 0～0.5%; Yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is the anodal raw material of preparation of the percentage by weight of surplus; According to zirconium: 0～0.5%, yttrium: 0～0.5%; Calcium: 0～0.5%; Lanthanum: 0～0.5%; Titanium: 0～0.5%; Platinum is the proportioning preparation negative pole raw material of the percentage by weight of surplus;
(2) vacuum melting: the above-mentioned anodal raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1860～1900 ℃ the condition, obtains positive grid alloy; The above-mentioned negative pole raw material for preparing is added in the vaccum sensitive stove, is 2 * 10 at pressure
-2～1 * 10
-5Pa, temperature is vacuum melting under 1770～1800 ℃ the condition, obtains the negative pole alloy;
(3) sheet is rolled in cast: above-mentioned liquid alloy through vacuum melting is cast in respectively forms ingot casting in the mold; On milling train, roll out the positive grid alloy sheet material then, negative pole alloy sheet material;
(4) oxidation processes: with above-mentioned positive grid alloy sheet material under 800～1400 ℃ through 60～150 hours oxidation processes, obtain anodal strengthened dispersion alloy thin slice; With above-mentioned negative pole alloy sheet material under 800～1400 ℃ through 80～180 hours oxidation processes, obtain negative pole strengthened dispersion alloy thin slice;
(5) Compound Machining: above-mentioned thousands of thin slices are compound, processing, realize the material structure fiberization, form positive pole and negative pole bar;
(6) drawing and forming: above-mentioned bar is carried out stretch processing, be drawn into required size.
4, dispersion intensifying platinum rhodium according to claim 3
13The production method of-platinum thermocouple silk, its feature also is: described mold is a water cooled copper mould.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20140081866A (en) * | 2011-11-11 | 2014-07-01 | 다나카 기킨조쿠 고교 가부시키가이샤 | Platinum-based thermocouple |
| CN103952584A (en) * | 2014-05-20 | 2014-07-30 | 重庆材料研究院有限公司 | Platinum-rhodium thermocouple fine wire material for measuring temperature of molten steel and preparation method thereof |
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| CN103952583B (en) * | 2014-05-20 | 2017-01-11 | 重庆材料研究院有限公司 | Reinforced platinum/rhodium 10-platinum fine thermocouple wire for quick temperature measurement and preparation method thereof |
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