CN109182825A - A method of improving platinum-tungsten alloys cold-forming property - Google Patents
A method of improving platinum-tungsten alloys cold-forming property Download PDFInfo
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- CN109182825A CN109182825A CN201810995525.1A CN201810995525A CN109182825A CN 109182825 A CN109182825 A CN 109182825A CN 201810995525 A CN201810995525 A CN 201810995525A CN 109182825 A CN109182825 A CN 109182825A
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- Prior art keywords
- platinum
- cold
- tungsten
- melting
- ingot casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of methods for the improvement platinum-tungsten alloys cold-forming property for belonging to Alloy Processing field.This method utilizes non-consumable arc furnace melting platinum, tungsten raw material 2 times or more, then it utilizes the suction pouring quick solidification apparatus containing water cooled copper mould that melt after melting is inhaled casting fast cold forming in water cooled copper mould and obtains ingot casting, gained ingot casting ingredient is uniformly, segregation-free generates and gross imperfection, it is effectively improved platinum-tungsten alloys cold-forming property, obtains the alloy material of smaller string diameter.
Description
Technical field
The invention belongs to Alloy Processing field, in particular to a kind of method for improving platinum-tungsten alloys cold-forming property.
Background technique
With the development of national defense industry, electronics industry and instrument and meter industry, the performance requirement of resistance-strain material is got over
Come higher.As resistance-strain material, it is necessary to have high resistance, and have high structural stability, inoxidizability, corrosion resistance
And intensity.The strain gauge material used earliest is nickel chromium triangle and corronil, but lower using temperature, and generally below 400 DEG C, Beijing has
The total institute of non-ferrous metal research develops 6JG precision high-resistance alloy, can achieve 500 DEG C or so.
In order to obtain the resistance-strain material with high-temperature stability, people start to notice precious metal alloys material, such as
Au-Pd-Fe and Au-Pd-Mo etc., these alloys have high resistivity, but tensile strength is not high, it is difficult to be processed into ultrafine wire.
The beginning of the sixties, people began one's study platinum-tungsten alloys, and high resistant superfine alloy silk material is chiefly used in priming system, and common material mainly has Ni-
Cr alloy, Cu alloy, Pt-W alloy etc., wherein Pt-W alloy wire compared with other materials, have low energy be under fire, it is corrosion-resistant,
The features such as compatibility is good, solderability is good can meet military project product to high safety, highly reliable, miniaturization well and can resist severe
The requirement that the directions such as environment capacity are developed.But in the prior art for preparing Pt-W alloy, due to cold working or hot-working
In the process, platinum-tungsten alloys has that easy processing hardening, ingot casting are easy to crack, and can not process to obtain the platinum tungsten of smaller string diameter
Alloy.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for improving platinum-tungsten alloys cold-forming property, and specific technical solution is such as
Under:
It is a kind of improve platinum-tungsten alloys cold-forming property method the following steps are included:
(1) non-consumable arc furnace working chamber is evacuated to 10-4Pa~10-3Platinum, tungsten raw material are placed in melting by Pa
In room, melting 2 times or more under 200-400A electric current；
(2) melt obtained by step (1) is inhaled into casting in water cooling using the suction pouring quick solidification apparatus containing water cooled copper mould
Fast cold forming in copper mold；Wherein water cooled copper mould diameter is 10mm-20mm, and inhaling casting pressure difference is 1KPa-5KPa.
The invention has the benefit that
(1) present invention is completely melt high-melting-point tungsten particle (block) by non-consumable arc furnace melting, so that preparation
Platinum-tungsten alloys ingot casting ingredient full and uniformization, without obvious segregation, and be avoided that the generation of macrostructure's defect；
(2) present invention is cast fast cooling formation technic with the use of inhaling, is effectively prevented by non-consumable arc furnace melting
Coarse columanar structure generates in tissue, and the crystal grain of gained ingot casting is tiny equiax crystal, improves ingot quality；
(3) ingot casting obtained using the method provided by the present invention can be used for platinum-tungsten alloys cold working, can effectively avoid platinum tungsten
The problems such as the alloy hardening of alloy cold working appearance, cracking, the alloy material of smaller string diameter can be obtained；And simplify platinum tungsten wire material
Preparation process, it is more environmentally-friendly, energy saving, efficient.
Detailed description of the invention
Attached drawing 1 is the metallographic structure figure of 1 gained platinum-tungsten alloys ingot casting of embodiment；
Attached drawing 2 is the metallographic structure figure of 3 gained platinum-tungsten alloys ingot casting of embodiment.
Specific embodiment
The present invention provides a kind of methods for improving platinum-tungsten alloys cold-forming property, do below with reference to embodiment to the present invention
Further instruction.
It is a kind of improve platinum-tungsten alloys cold-forming property method the following steps are included:
(1) non-consumable arc furnace working chamber is evacuated to 10-4Pa~10-3Platinum, tungsten raw material are placed in melting by Pa
In room, melt back 2 times or more under 200-400A electric current；Wherein platinum, the mass percent of tungsten is 5wt%- in tungsten raw material
20wt%；
(2) the suction pouring quick solidification apparatus containing water cooled copper mould is utilized, adjusting suction casting pressure difference is 1KPa-5KPa, will
Melt obtained by step (1) inhales casting in the water cooled copper mould of diameter 10mm-20mm, and fast cold forming obtains ingot casting；
Ingot casting obtained by the above method is used for platinum-tungsten alloys cold working: cold rolling, rolling deformation are carried out to gained ingot casting
When amount 10%~20%, make annealing treatment to platinum-tungsten alloys: 900-1300 DEG C of annealing temperature, 30~50min of annealing time is moved back
Fiery process atmosphere protection；Cold-drawn wire is carried out to gained bar, when wire drawing deflection 20%-50%, silk material is made annealing treatment:
700-1000 DEG C of annealing temperature, annealing time 5-20min, annealing process atmosphere protection；It can stablize, mass-produce string diameter
Greater than 0.01mm ultra-fine wire.
Embodiment 1
(1) ingredient: according to Pt 92%, 8% ingredient of W, material purity is greater than 99.99% for platinum, tungsten raw material；
(2) melting: non-consumable arc furnace melting is used, working chamber is evacuated to 10 before melting-3Pa, by platinum,
Tungsten raw material is placed in working chamber, melt back 2 times under the electric arc of 300A；
(3) it inhales casting: utilizing suction pouring quick solidification apparatus, adjusting suction casting pressure difference is 1KPa, by melt obtained by step (2)
Casting is inhaled to existIt thickeies in water cooled copper mould, fast cold forming obtains ingot casting.Metallographic structure analysis is carried out to ingot casting is obtained, as a result
As shown in Figure 1.
Ingot casting upper, middle and lower different location is sampled and carries out constituent analysis, it is specific as shown in table 1, as can be seen from Table 1, institute
Ingot casting ingredient uniformly, segregation-free generate.
1. embodiment of table, 1 gained ingot casting constituent analysis
Cold rolling is carried out to gained ingot casting, when rolling reduction 20%, platinum-tungsten alloys is made annealing treatment: annealing temperature
900 DEG C, annealing time 30min, annealing process atmosphere protection；Cold-drawn wire is carried out to gained bar, it is right when wire drawing deflection 50%
Silk material is made annealing treatment: 700 DEG C of annealing temperature, annealing time 5min, annealing process atmosphere protection；String diameter can be producedUltra-fine wire.
Embodiment 2
(1) ingredient: according to 10% ingredient of Pt90%, W, material purity is greater than 99.99% for platinum, tungsten raw material；
(2) melting: non-consumable arc furnace melting is used, working chamber is evacuated to 10 before melting-4Pa, by platinum,
Tungsten raw material is placed in working chamber, melt back 3 times under the electric arc of 400A；
(3) it inhales casting: utilizing suction pouring quick solidification apparatus, adjusting suction casting pressure difference is 3KPa, by melt obtained by step (2)
Casting is inhaled to existIt thickeies in water cooled copper mould, fast cold forming obtains ingot casting.
Ingot casting upper, middle and lower different location is sampled and carries out constituent analysis, it is specific as shown in table 2, as can be seen from Table 2, institute
Ingot casting ingredient uniformly, segregation-free generate.
2. embodiment of table, 2 gained ingot casting constituent analysis
Cold rolling is carried out to gained ingot casting, when rolling reduction 15%, platinum-tungsten alloys is made annealing treatment: annealing temperature
1000 DEG C, annealing time 40min, annealing process atmosphere protection；Cold-drawn wire is carried out to gained bar, when wire drawing deflection 30%,
Silk material is made annealing treatment: 800 DEG C of annealing temperature, annealing time 10min, annealing process atmosphere protection；Wire vent can be produced
DiameterUltra-fine wire.
Embodiment 3
(1) ingredient: according to Pt 85%, 15% ingredient of W, material purity is greater than 99.99% for platinum, tungsten raw material；
(2) melting: non-consumable arc furnace melting is used, working chamber is evacuated to 10 before melting-4Pa, by platinum,
Tungsten raw material is placed in working chamber, melt back 3 times under the electric arc of 300A；
(3) it inhales casting: utilizing suction pouring quick solidification apparatus, adjusting suction casting pressure difference is 5KPa, by melt obtained by step (2)
Casting is inhaled to existIt thickeies in water cooled copper mould, fast cold forming obtains ingot casting；Metallographic structure analysis, knot are carried out to ingot casting is obtained
Fruit is as shown in Figure 2.
Ingot casting upper, middle and lower different location is sampled and carries out constituent analysis, it is specific as shown in table 3, as can be seen from Table 3, institute
Ingot casting ingredient uniformly, segregation-free generate.
3. embodiment of table, 3 gained ingot casting constituent analysis
Cold rolling is carried out to gained ingot casting, when rolling reduction 20%, platinum-tungsten alloys is made annealing treatment: annealing temperature
1300 DEG C, annealing time 50min, annealing process atmosphere protection；Cold-drawn wire is carried out to gained bar, when wire drawing deflection 20%,
Silk material is made annealing treatment: 1000 DEG C of annealing temperature, annealing time 20min, annealing process atmosphere protection；Wire vent can be produced
DiameterUltra-fine wire.
Can be seen that the ingot casting that the present invention obtains from Fig. 1, metallographic structure shown in Fig. 2 is uniform isometric fine grained texture,
Without obvious segregation phase and gross imperfection, and it can guarantee the progress of later period cold machining process, and then avoid hot-working bring oxygen
The problems such as change, and then obtain ultra-fine wire.
Claims (4)
1. it is a kind of improve platinum-tungsten alloys cold-forming property method, which is characterized in that using non-consumable arc furnace melting platinum,
Tungsten raw material 2 times or more, then utilize the suction pouring quick solidification apparatus containing water cooled copper mould that melt after melting is inhaled casting in water
Fast cold forming in cold copper mold.
2. the method according to claim 1, wherein before melting, the vacuum of non-consumable arc furnace working chamber
Degree is 10-4Pa~10-3Pa, electric current 200-400A.
3. the method according to claim 1, wherein water cooled copper mould diameter is 10mm-20mm.
4. the method according to claim 1, wherein inhaling casting pressure difference is 1KPa-5KPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810995525.1A CN109182825A (en) | 2018-08-29 | 2018-08-29 | A method of improving platinum-tungsten alloys cold-forming property |
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| CN201810995525.1A CN109182825A (en) | 2018-08-29 | 2018-08-29 | A method of improving platinum-tungsten alloys cold-forming property |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115807177A (en) * | 2021-09-13 | 2023-03-17 | 田中贵金属工业株式会社 | Medical Pt alloy wire and medical Pt alloy coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004059019A1 (en) * | 2002-12-20 | 2004-07-15 | Liquidmetal Technologies, Inc. | Pt-BASE BULK SOLIDIFYING AMORPHOUS ALLOYS |
| CN101716670A (en) * | 2009-10-29 | 2010-06-02 | 重庆理工大学 | Rapid solidification preparing method of contact material of chrome copper alloy |
| CN105479034A (en) * | 2014-10-09 | 2016-04-13 | 核工业西南物理研究院 | Copper-based brazing filler metal for tungsten/copper welding and preparing method of brazing filler metal |
| CN107841648A (en) * | 2017-11-22 | 2018-03-27 | 有研亿金新材料有限公司 | A kind of method for improving platinum-tungsten alloys hot-working character |
-
2018
- 2018-08-29 CN CN201810995525.1A patent/CN109182825A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004059019A1 (en) * | 2002-12-20 | 2004-07-15 | Liquidmetal Technologies, Inc. | Pt-BASE BULK SOLIDIFYING AMORPHOUS ALLOYS |
| CN101716670A (en) * | 2009-10-29 | 2010-06-02 | 重庆理工大学 | Rapid solidification preparing method of contact material of chrome copper alloy |
| CN105479034A (en) * | 2014-10-09 | 2016-04-13 | 核工业西南物理研究院 | Copper-based brazing filler metal for tungsten/copper welding and preparing method of brazing filler metal |
| CN107841648A (en) * | 2017-11-22 | 2018-03-27 | 有研亿金新材料有限公司 | A kind of method for improving platinum-tungsten alloys hot-working character |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115807177A (en) * | 2021-09-13 | 2023-03-17 | 田中贵金属工业株式会社 | Medical Pt alloy wire and medical Pt alloy coil |
| CN115807177B (en) * | 2021-09-13 | 2024-05-07 | 田中贵金属工业株式会社 | Medical Pt alloy wire and medical Pt alloy coil |
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