CN102031414A - Method for preparing fine grain CuNi45 alloy wires - Google Patents
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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
The invention belongs to metallurgical preparing technical field, be specifically related to a kind of method for preparing close grain CuNi45 alloy wire.
Background technology
The CuNi45 alloy is one of main raw of preparation thermopair and compensation lead of thermocouple material.Current, the main preparation method of CuNi45 alloy wire has hubbing and extrusion process.This two kinds of method devices needed and complex process, the length that expends time in, therefore it is lower to develop cost, and the preparation method of the CuNi45 alloy wire of the simple and superior performance of technology has realistic meaning.
Summary of the invention
The purpose of this invention is to provide a kind of method for preparing close grain CuNi45 alloy wire, solved existing method and prepared CuNi45 alloy wire preparation cost height, equipment complexity, the problem that the cycle is long, by adding the crystal grain in the micro-refinement wire rod tissue, improve the thermoelectricity capability of material simultaneously.
The technical solution adopted in the present invention is, a kind of method for preparing close grain CuNi45 alloy wire is specifically implemented according to following steps:
Step 1: take by weighing 1.0%～3% Ti powder and 45% Ni powder according to mass percent, surplus is a copper rod, more than the mass percent sum of each component be 100%, the Ti powder that takes by weighing is mixed with the Ni powder, mixing the powder time is 3h～5h;
Perhaps take by weighing 0.1%～0.3% B powder and 45% Ni powder according to mass percent, surplus is a copper rod, more than the mass percent sum of each component be 100%, the B powder that takes by weighing is mixed with the Ni powder, mixing the powder time is 3h～5h;
Perhaps take by weighing 1.0%～3% CeO according to mass percent
2Powder and 45% Ni powder, surplus is a copper rod, more than the mass percent sum of each component be 100%, with the CeO that takes by weighing
2Powder mixes with the Ni powder, and mixing the powder time is 3h～5h;
Step 2: melting
Ti powder and Ni powder mixed powder that the last step obtains are put into crucible, then the copper rod that takes by weighing is put into mixed powder, crucible is placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Perhaps will go up the B powder and the Ni powder mixed powder that obtain of step and put into crucible, then the copper rod that takes by weighing be put into mixed powder, crucible will be placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Perhaps will go up the CeO that the step obtains
2Powder and Ni powder mixed powder are put into crucible, then the copper rod that takes by weighing are put into mixed powder, and crucible is placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Step 3: machining
The CuNi45 alloy cast ingot that step 2 is obtained carries out machining, and car goes epidermis to remove impurity, intercepts into alloy block again;
Step 4: the preparation of wire rod
The alloy block that step 3 is obtained is placed in the quartz funnel, and funnel is placed in the plumbago crucible, plumbago crucible is positioned in the high-temperature vacuum sintering oven then, carries out secondary smelting, obtains close grain CuNi45 alloy wire.
Characteristics of the present invention also are,
Ti powder degree wherein is 200～300 orders, and purity is 99.99%.
Ni powder degree wherein is 50～200 orders, and purity is 99.9%.
Copper rod purity wherein is higher than 99.9%.
B powder degree wherein is 200～300 orders, and purity is 99.99%.
CeO wherein
2The powder degree is 200～300 orders, and purity is 99.99%.
Melting in the step 2 is wherein specifically implemented according to following steps: earlier to vacuumizing in the stove, make the intravital vacuum tightness of stove less than 5Pa; To heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃ then, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cools to room temperature with stove.
Secondary smelting in the step 4 is wherein specifically implemented according to following steps: earlier to vacuumizing in the stove, make the intravital vacuum tightness of stove less than 5Pa; Then High Temperature Furnaces Heating Apparatus is heated, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove.
The invention has the beneficial effects as follows, provide a kind of can prepare alloy structure evenly, the preparation method of CuNi45 alloy wire that crystal grain is more tiny, and low, the consuming time weak point of the inventive method cost, technology is simple, equipment is simple, enforcement easily.
Description of drawings
Fig. 1 is a preparation method's of the present invention schema;
Fig. 2 is the CuNi45 alloy casting state SEM photo that adds 1.0wt%Ti in the embodiment of the invention 2;
Fig. 3 is the line sweep photo that adds the CuNi45 alloy casting state of 1.0wt%Ti in the embodiment of the invention 2;
Fig. 4 is the concentration profile figure of the Cu of horizontal line place, Ni among Fig. 3;
Fig. 5 is the Seebeck coefficient curve of the CuNi45 alloy wire of preparation among the embodiment of the invention 1, embodiment 2, embodiment 3, the embodiment 4.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The present invention prepares the method for close grain CuNi45 alloy wire, as shown in Figure 1, specifically implements according to following steps:
Step 1: taking by weighing 1.0%～3% granularity according to mass percent is that 200～300 order purity are 99.99% Ti powder, and 45% granularity is that 50～200 order purity are 99.9% the pure Ni powder of electrolysis, surplus is that purity is higher than 99.9% T2 red copper bar, more than the mass percent sum of each component be 100%, the Ti powder that takes by weighing is mixed with the Ni powder, and mixing the powder time is 3h～5h;
Perhaps taking by weighing 0.1%～0.3% granularity according to mass percent is that 200～300 order purity are 99.99% B powder, and 45% granularity is that 50～200 order purity are 99.9% the pure Ni powder of electrolysis, surplus is that purity is higher than 99.9% T2 red copper bar, more than the mass percent sum of each component be 100%, the B powder that takes by weighing is mixed with the Ni powder, and mixing the powder time is 3h～5h;
Perhaps taking by weighing 1.0%～3% granularity according to mass percent is that 200～300 order purity are 99.99% CeO
2Powder, and 45% granularity is that 50～200 order purity are 99.9% the pure Ni powder of electrolysis, surplus is that purity is higher than 99.9% T2 red copper bar, more than the mass percent sum of each component be 100%, with the CeO that takes by weighing
2Powder mixes with the Ni powder, and mixing the powder time is 3h～5h.
Step 2: melting
Ti powder and Ni powder mixed powder that the last step obtains are put into corundum crucible, then the copper rod that takes by weighing is put into the powder that mixes, crucible is placed in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; Then to heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cool to room temperature, obtain the CuNi45 alloy cast ingot with stove;
Perhaps will go up the B powder and the Ni powder mixed powder that obtain of step and put into corundum crucible, and then the copper rod that takes by weighing be put into the powder that mixes, crucible is placed in the high-temperature vacuum sintering oven, to vacuumizing in the stove, the intravital vacuum tightness of assurance stove is less than 5Pa earlier; Then to heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cool to room temperature, obtain the CuNi45 alloy cast ingot with stove;
Perhaps will go up the CeO that the step obtains
2Powder and Ni powder mixed powder are put into corundum crucible, then the copper rod that takes by weighing are put into the powder that mixes, and crucible is placed in the high-temperature vacuum sintering oven, earlier to vacuumizing in the stove, guarantee that the intravital vacuum tightness of stove is less than 5Pa; Then to heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cool to room temperature, obtain the CuNi45 alloy cast ingot with stove.
Step 3: machining
The CuNi45 alloy cast ingot that step 2 is obtained carries out machining, and car goes epidermis to remove impurity, intercepts into an amount of alloy block again, is used for the preparation of wire rod.
Step 4: the preparation of wire rod
The alloy block of step 3 intercepting is placed in the quartz funnel, funnel is placed in the passive plumbago crucible, then plumbago crucible is positioned in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; Then High Temperature Furnaces Heating Apparatus is heated, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cool to room temperature, obtain close grain CuNi45 alloy wire with stove.
According to the chemical ingredients mass percent of CuNi45 alloy is that to take by weighing granularity be that 50～200 order purity are that 99.9% pure Ni powder of electrolysis and purity are higher than 99.9% T2 red copper bar for the ratio of Cu:Ni=55%:45%, load weighted Ni powder and Cu rod are put into successively the corundum crucible of 30ml, crucible is placed in the high-temperature vacuum sintering oven then, to vacuumizing in the stove, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier; Then to heating in the stove, the control rate of heating is 20 ℃/min, when temperature in the stove reaches 900 ℃, rate of heating with 10 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, the insulation 20～70min after, naturally cool to room temperature with stove, alloy in sintering process not by additional any pressure.Subsequently alloy is carried out machining, car removes epidermis, is used for the preparation of wire rod with an amount of alloy block of handsaw intercepting; An amount of alloy block of intercepting is placed in the quartz funnel, funnel is placed in the passive plumbago crucible, then crucible is positioned in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; To heating in the stove, the control rate of heating is 20 ℃/min then, and when temperature in the stove reached 900 ℃, the rate of heating with 10 ℃/min continued to heat up again, and final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove; Take out the CuNi45 alloy wire at last.
Embodiment 2
Taking by weighing granularity 50～200 order purity according to the mass percent of Ti:Ni=1.0%:45% is that 99.9% pure Ni powder of electrolysis and granularity are that 200～300 order purity are 99.99% Ti powder.The Ni powder is mixed with the Ti powder, mixing the powder time is 3h～5h again.The corundum crucible that the powder that mixes and Cu rod are put into 30ml successively then, powder wants pine to be housed in the corundum crucible, then crucible is placed the high-temperature vacuum sintering oven, earlier to vacuumizing in the stove, guarantees that the intravital vacuum tightness of stove is less than 5Pa; Then to heating in the stove, the control rate of heating is 20 ℃/min, when temperature to 900 in the stove ℃, rate of heating with 10 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, the insulation 20～70min after, naturally cool to room temperature with stove, alloy in sintering process not by additional any pressure.Subsequently alloy is carried out machining, car removes epidermis, with an amount of alloy block of handsaw intercepting, is used for the preparation of wire rod again; An amount of alloy block of intercepting is placed in the quartz funnel, funnel is placed in the passive plumbago crucible, then crucible is positioned in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; To heating in the stove, the control rate of heating is 20 ℃/min then, and when temperature in the stove reached 900 ℃, the rate of heating with 10 ℃/min continued to heat up again, and final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove; Take out the CuNi45 alloy wire at last.
As Fig. 2, Fig. 3 and shown in Figure 4, add the alloy sample of 1.0%Ti as can be seen, to organize more evenly, crystal grain is more tiny; As shown in Figure 5, add the sample of 1.0%Ti as can be seen and compare with the sample that does not add alloying element, Seebeck coefficient increases, and Seebeck coefficient is high more, and the thermoelectricity capability of material is good more.
Embodiment 3
Taking by weighing granularity according to the mass percent of B:Ni=0.1%:45% is that 50～200 order purity are that 99.9% pure Ni powder of electrolysis and granularity are that 200～300 order purity are 99.99% B powder.The B powder is mixed with the Ti powder, mixing the powder time is 3h～5h again.The corundum crucible that the powder that mixes and Cu rod are put into 30ml successively then, powder wants pine to be housed in the corundum crucible, then crucible is placed the high-temperature vacuum sintering oven, earlier to vacuumizing in the stove, guarantees that the intravital vacuum tightness of stove is less than 5Pa; Then to heating in the stove, the control rate of heating is 20 ℃/min, when temperature in the stove reaches 900 ℃, rate of heating with 10 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, the insulation 20～70min after, naturally cool to room temperature with stove, alloy in sintering process not by additional any pressure.Subsequently the W-Ti alloy is carried out machining, car removes epidermis, with an amount of alloy block of handsaw intercepting, is used for the preparation of wire rod; An amount of alloy block of intercepting is placed in the quartz funnel, funnel is placed in the passive plumbago crucible, then crucible is positioned in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; To heating in the stove, the control rate of heating is 20 ℃/min then, and when temperature in the stove reached 900 ℃, the rate of heating with 10 ℃/min continued to heat up again, and final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove; Take out the CuNi45 alloy wire at last.
According to CeO
2: it is that 50～200 order purity are that 99.9% pure Ni powder of electrolysis and purity are 99.99% CeO that the mass percent of Ni=1.0%:45% takes by weighing granularity
2Powder.Again with Ni powder and CeO
2Powder mixes, and mixing the powder time is 3h～5h.The corundum crucible that the powder that mixes and Cu rod are put into 30ml successively then notices that mixed powder wants pine to be housed in the corundum crucible, then crucible is placed the high-temperature vacuum sintering oven, and to vacuumizing in the stove, the intravital vacuum tightness of assurance stove is less than 5Pa earlier; Then High Temperature Furnaces Heating Apparatus is heated, the control rate of heating is 20 ℃/min, when temperature in the stove reaches 900 ℃, rate of heating with 10 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, the insulation 20～70min after, naturally cool to room temperature with stove, alloy in sintering process not by additional any pressure.Subsequently alloy is carried out machining, car removes epidermis, with an amount of alloy block of handsaw intercepting, is used for the preparation of wire rod; An amount of alloy block of intercepting is placed in the quartz funnel, funnel is placed in the passive plumbago crucible, then crucible is positioned in the high-temperature vacuum sintering oven,, guarantee that the intravital vacuum tightness of stove is less than 5Pa earlier to vacuumizing in the stove; To heating in the stove, the control rate of heating is 20 ℃/min then, and when temperature in the stove reached 900 ℃, the rate of heating with 10 ℃/min continued to heat up again, and final casting temperature is 1200～1270 ℃, and behind insulation 20～60min, the alloy furnace cooling is to room temperature; Take out the CuNi45 alloy wire at last.
As shown in Figure 5, in four embodiment, add the sample of trace alloying element and compare with the sample that does not add the CuNi45 alloying element as can be seen, Seebeck coefficient all increases.The secondary dendrite spacing arm of the CuNi45 alloy that table 1 is prepared for above-mentioned four embodiment:
The secondary dendrite spacing arm of the CuNi45 alloy that four embodiment of table 1 prepare
| | Embodiment | 1 | Embodiment 2 | Embodiment 3 | |
| Add alloying element (wt%) | Do not have | 1.0%Ti | 0.1%B | 1.0%CeO 2 | |
| Secondary dendrite spacing arm (μ m) | 120 | 108 | 106 | 110 |
Inventive point of the present invention place:
1. the Ti powder has refinement dendrite, reduces dendritic segregation, changes the effect of second phase morphology; For the CuNi45 alloy, the experiment in early stage shows: the addition of Ti＜1.0% or 3% o'clock, not obvious to the influence of alloy structure; And add 1.0%～3% Ti powder, and can refinement dendrite, reduce dendritic segregation.
2. the B powder has refinement alloy branch crystal tissue and changes second phase morphology and distribution, and its major cause is boron has played strong alterant in alloy effect.For the CuNi45 alloy, the experiment in early stage shows: the addition of B＜0.1% or 0.3% o'clock, not obvious to the influence of alloy structure; And add 0.1%～0.3% B powder, and can obviously reach refinement dendrite, reduce the effect of dendritic segregation.
3. CeO
2At high temperature can be decomposed to form [Ce] and [O].Therefore, CeO at high temperature
2Also can have active chemical property as simple substance Ce.On the one hand can thinning microstructure, can change impurity form and distribution on the other hand; For the CuNi45 alloy, the experiment in early stage shows: when adding CeO
2Powder＜1.0% o'clock, not obvious to the influence of alloy structure; When adding CeO
23.0% o'clock, alloy structure is not fine and close.
4. the processing parameter of melting is: earlier to vacuumizing in the stove, guarantee that the intravital vacuum tightness of stove is less than 5Pa; To heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃ then, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cools to room temperature with stove;
Because the low needed less calories of thermophase, the needed heat of hot stage is many, consider the velocity range that High Temperature Furnaces Heating Apparatus heats up and allowed simultaneously, and for alloy can be mixed stably at hot stage, so selecting rate of heating at low thermophase is 20～30 ℃/min, hot stage continues to heat up with the rate of heating of 10～15 ℃/min; In order to guarantee between smelting period, can either obtain densification and uniform alloy, can guarantee the non-volatile loss of alloying element again, so the final smelting temperature of setting is 1300～1450 ℃, insulation 20～70min.
5. the processing parameter of secondary smelting is: earlier to vacuumizing in the stove, guarantee that the intravital vacuum tightness of stove is less than 5Pa; To heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃ then, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove;
Because the low needed less calories of thermophase, the needed heat of hot stage is many, consider the velocity range that High Temperature Furnaces Heating Apparatus heats up and allowed simultaneously, and for alloy can be mixed stably at hot stage, so selecting rate of heating at low thermophase is 20～30 ℃/min, hot stage continues to heat up with the rate of heating of 10～15 ℃/min; For during guaranteeing secondary smelting, can either obtain complete continuously and fine and close alloy wire uniformly can be unlikely to again the funnel crucible is burnt out, so the final smelting temperature of setting is 1200～1270 ℃, insulation 20～60min.
Claims (8)
1. a method for preparing close grain CuNi45 alloy wire is characterized in that, specifically implements according to following steps:
Step 1: take by weighing 1.0%～3% Ti powder and 45% Ni powder according to mass percent, surplus is a copper rod, more than the mass percent sum of each component be 100%, the Ti powder that takes by weighing is mixed with the Ni powder, mixing the powder time is 3h～5h;
Perhaps take by weighing 0.1%～0.3% B powder and 45% Ni powder according to mass percent, surplus is a copper rod, more than the mass percent sum of each component be 100%, the B powder that takes by weighing is mixed with the Ni powder, mixing the powder time is 3h～5h;
Perhaps take by weighing 1.0%～3% CeO according to mass percent
2Powder and 45% Ni powder, surplus is a copper rod, more than the mass percent sum of each component be 100%, with the CeO that takes by weighing
2Powder mixes with the Ni powder, and mixing the powder time is 3h～5h;
Step 2: melting
Ti powder and Ni powder mixed powder that the last step obtains are put into crucible, then the copper rod that takes by weighing is put into mixed powder, crucible is placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Perhaps will go up the B powder and the Ni powder mixed powder that obtain of step and put into crucible, then the copper rod that takes by weighing be put into mixed powder, crucible will be placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Perhaps will go up the CeO that the step obtains
2Powder and Ni powder mixed powder are put into crucible, then the copper rod that takes by weighing are put into mixed powder, and crucible is placed in the high-temperature vacuum sintering oven, carry out melting, obtain the CuNi45 alloy cast ingot;
Step 3: machining
The CuNi45 alloy cast ingot that step 2 is obtained carries out machining, and car goes epidermis to remove impurity, intercepts into alloy block again;
Step 4: the preparation of wire rod
The alloy block that step 3 is obtained is placed in the quartz funnel, and funnel is placed in the plumbago crucible, plumbago crucible is positioned in the high-temperature vacuum sintering oven then, carries out secondary smelting, obtains close grain CuNi45 alloy wire.
2. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, described Ti powder degree is 200～300 orders, and purity is 99.99%.
3. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, described Ni powder degree is 50～200 orders, and purity is 99.9%.
4. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, described copper rod purity is higher than 99.9%.
5. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, described B powder degree is 200～300 orders, and purity is 99.99%.
6. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, described CeO
2The powder degree is 200～300 orders, and purity is 99.99%.
7. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, the melting in the described step 2 is specifically implemented according to following steps: earlier to vacuumizing in the stove, make the intravital vacuum tightness of stove less than 5Pa; To heating in the stove, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃ then, rate of heating with 10～15 ℃/min continues to heat up again, final smelting temperature is 1300～1450 ℃, behind insulation 20～70min, naturally cools to room temperature with stove.
8. the method for preparing close grain CuNi45 alloy wire according to claim 1 is characterized in that, the secondary smelting in the described step 4 is specifically implemented according to following steps: earlier to vacuumizing in the stove, make the intravital vacuum tightness of stove less than 5Pa; Then High Temperature Furnaces Heating Apparatus is heated, the control rate of heating is 20～30 ℃/min, when temperature in the stove reaches 900～1000 ℃, rate of heating with 10～15 ℃/min continues to heat up again, final casting temperature is 1200～1270 ℃, behind insulation 20～60min, naturally cools to room temperature with stove.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082548A (en) * | 2018-07-13 | 2018-12-25 | 湖州市道场乡资产经营有限公司 | A kind of Cu-Ni system powder sintering process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5445622A (en) * | 1977-09-19 | 1979-04-11 | Inoue Japax Res Inc | Thermocouple |
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2010
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5445622A (en) * | 1977-09-19 | 1979-04-11 | Inoue Japax Res Inc | Thermocouple |
Non-Patent Citations (1)
| Title |
|---|
| 《中华人民共和国国家标准 GB/T 4994-1998》 19981211 张泽林等 铁-铜镍（康铜）热电偶丝 国家质量技术监督总局 全文 1-8 , 2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082548A (en) * | 2018-07-13 | 2018-12-25 | 湖州市道场乡资产经营有限公司 | A kind of Cu-Ni system powder sintering process |
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