CN105506376A - Low-cost and high-strength titanium-iron-aluminum-carbon alloy - Google Patents
Low-cost and high-strength titanium-iron-aluminum-carbon alloy Download PDFInfo
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- CN105506376A CN105506376A CN201510979939.1A CN201510979939A CN105506376A CN 105506376 A CN105506376 A CN 105506376A CN 201510979939 A CN201510979939 A CN 201510979939A CN 105506376 A CN105506376 A CN 105506376A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- 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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Abstract
The invention discloses a low-cost and high-strength titanium-iron-aluminum-carbon alloy. The alloy comprises the following chemical components in percentage by mass: 14.5-15.5% of Fe, 3.5-4.5% of Al, 0.06-0.09% of C, and the balance of Ti and inevitable impurities. A preparation method of the titanium-iron-aluminum-carbon alloy mainly comprises the following steps: the alloy with the components is put in a water-cooled copper crucible of an arc furnace for smelting; the back bottom vacuum of the arc furnace before smelting is higher than 2.0*10-2 Pa; the current working range of an arc welding power supply is 300-500 A; the voltage working range is 15-30 V; the smelting temperature is 2300-2800 DEG C; single ingot is smelted by 3-4 minutes each time; at least 8 times of smelting are repeated; the smelted alloy ingot is cooled along with the crucible; and the uniformly smelted alloy is taken out from the crucible for casting-state sample performance analysis or subsequent processing. The titanium-iron-aluminum-carbon alloy has a titanium alloy with higher strength and certain plasticity, is easier to smelt, and is low in cost.
Description
Technical field
The invention belongs to technical field of metal, particularly a kind of titanium alloy.
Background technology
Titanium is low density metals in one (its density is 4.5), there is higher specific tenacity, middle warm nature can be good, nonmagnetic, there is extremely strong corrosion resistance, good welding performance is the structural metallic materials of excellent performance, at high-end technical field dominates day by day such as Aeronautics and Astronautics, naval vessel, nuclear power, weaponry, oil production and biomedical materials.Titanium material is applied mainly with alloy form, as higher in the TB Type Titanium Alloy intensity by adding the acquisitions such as all kinds of β phase stable element and molybdenum, tungsten, vanadium, chromium, niobium, tantalum, manganese, cobalt, is the important content of Ti alloy with high performance research and development application.Because some β phase stable element fusing points are higher, be difficult to melting, such as vanadium (fusing point 1890 DEG C), molybdenum (fusing point 2610 DEG C), chromium (fusing point 1907 DEG C), tantalum (fusing point 2996 DEG C), tungsten (fusing point 3380 DEG C), the use of these high-melting-point raw materials will improve the manufacturing cost of titanium alloy.In addition, according to rough market survey, the price of some alloy elements is high, such as, and vanadium (about 3000 yuan/KG), molybdenum (about 500 yuan/KG), chromium (about 650 yuan/KG), tantalum (about 4800 yuan/KG), tungsten (about 500 yuan/KG).Described in comprehensive, the employing of low cost element is more conducive to the application of titanium alloy.
Summary of the invention
The low-cost high-strength ferrotianium aluminium carbon alloy that the object of the present invention is to provide a kind of fusing point of raw material and cost all lower.
Ferrotianium aluminium carbon alloy of the present invention is a kind of TB type ferrotianium aluminium carbon alloy with higher ferro element and carbon element content, its chemical composition mass percent is: Fe14.5-15.5%, Al3.5-4.5%, C0.06-0.09%, and surplus is Ti and inevitable impurity.
The preparation method of above-mentioned ferrotianium aluminium carbon alloy is as follows:
The alloy of mentioned component is placed in the water jacketed copper crucible of electric arc furnace, utilizes vacuum non-consumable arc furnace to carry out melting, before melting, the back end vacuum of electric arc furnace is higher than 2.0 × 10
-2pa, arc-welding source current work scope is 300-500A, voltage power supply scope is 15-30V, smelting temperature is 2300-2800 DEG C, the each smelting time of single ingot casting is 3-4 minute, minimum 8 times of melt back, and the complete alloy pig of melting cools with crucible, after the uniform alloy of melting takes out from crucible, for casting the analysis of state alloy property or following process.
According to ferrotitanium binary alloy phase diagram, the alloy of rich titanium one end is by Titanium base and ferrotitanium phase composite, and matrix β titanium is body-centered cubic phase, has splendid plasticity, and ferrotitanium, as alloy cpd phase, mainly plays the effect of strengthening in the base.By choose reasonable alloying constituent and add other alloying element as aluminium, carbon etc., realize refinement matrix and second-phase, the phase composite of optimized alloy, improve its pattern and distribution, heavy alloyed mechanical property can be put forward further.In the present invention, Fe is main alloying elements, and Al is secondary alloy element, and C is micro-alloying elements.Alloys producing used comprises stable β phase, solution strengthening, second-phase strength, improve alloy microtexture and to reduce in alloy oxygen element to the impact etc. of performance.
The present invention compared with prior art tool has the following advantages:
1, the present invention is object with titanium alloy part, with ferrotianium two kinds of elements for alloy bulk, by adding a small amount of aluminium element and trace carbon element, becomes the titanium alloy with higher-strength and certain plasticity.
2, not only melting is easier to, and with low cost.
Accompanying drawing explanation
Fig. 1 is the engineering stress-strain curve figure under the ferrotianium aluminium carbon alloy as cast condition Uniaxial Compression of the embodiment of the present invention 1 preparation;
Fig. 2 is the metallographic microstructure figure of ferrotianium aluminium carbon alloy as cast condition prepared by the embodiment of the present invention 1.
Embodiment
Embodiment 1
With the feed proportioning such as iron-carbon and 4 grams of fine aluminiums that 81 grams of pure titanium silks, 15 grams of carbon contents are 0.56%, use non-consumable arc furnace melting.During melting, the back end vacuum of electric arc furnace is higher than 2.0 × 10
-2pa, arc-welding source working current is 400A, and operating voltage is 20V, and smelting temperature the best is about 2800 DEG C, the each smelting time of single ingot casting is 4 minutes, alloy is after being smelted into an entirety for the first time, and in crucible, turn-over carries out secondary smelting, so repeatedly, amount to 8 times, the complete alloy pig of melting cools with crucible, after the uniform alloy of melting takes out from crucible, and obtained high strength ferrotianium aluminium carbon alloy.
Treat that alloy melting is complete, by Wire EDM, from alloy pig different positions, to cut radius be the height of 5m is the cylinder sample of 10mm, carries out Mechanics Performance Testing with the Compressive Mechanical trier with extensometer.Test result shows that alloy has excellent mechanical property, table specific as follows:
The basic mechanical performance of table one rolling state alloy of the present invention
As shown in Figure 1, can find out: the yield strength of prepared alloy is higher, and its unit elongation, more than 15%, is a kind of Ti alloy with high performance material having higher-strength and plasticity concurrently under Uniaxial Compression.
As shown in Figure 2, can find out the microstructure of alloy by Titanium base and in the base equally distributed strengthening phase form, wherein the average grain size of Titanium base is greater than 50 microns, and strengthening phase is greater than 10 microns.
Embodiment 2
With the feed proportioning such as iron-carbon and 3.5 grams of fine aluminiums that 81.5 grams of pure titanium silks, 15 grams of carbon contents are 0.45%, use non-consumable arc furnace melting.During melting, the back end vacuum of electric arc furnace is higher than 2.0 × 10
-2pa, arc-welding source working current is 500A, and operating voltage is 30V, and smelting temperature the best is about 2300 DEG C, and each smelting time of single ingot casting is 4 minutes.Alloy is after being smelted into an entirety for the first time, and in crucible, turn-over carries out secondary smelting, and so repeatedly, amount to 8 times, the complete alloy pig of melting cools with crucible, after the uniform alloy of melting takes out from crucible, obtains high strength ferrotianium aluminium carbon alloy.
Example 3
With the feed proportioning such as iron-carbon and 3 grams of fine aluminiums that 82 grams of pure titanium silks, 15 grams of carbon contents are 0.5%, use non-consumable arc furnace melting.During melting, the back end vacuum of electric arc furnace is higher than 2.0 × 10
-2pa, arc-welding source working current is 300A, and operating voltage is 15V, and smelting temperature the best is about 2500 DEG C, and each smelting time of single ingot casting is 3 minutes.Alloy is after being smelted into an entirety for the first time, and in crucible, turn-over carries out secondary smelting, and so repeatedly, amount to 8 times, the complete alloy pig of melting cools with crucible, after the uniform alloy of melting takes out from crucible, obtains high strength ferrotianium aluminium carbon alloy.
Claims (2)
1. a low-cost high-strength ferrotianium aluminium carbon alloy, it is characterized in that: it is a kind of TB type ferrotianium aluminium carbon alloy with higher ferro element and carbon element content, its chemical composition mass percent is: Fe14.5-15.5%, Al3.5-4.5%, C0.06-0.09%, and surplus is Ti and inevitable impurity.
2. the preparation method of the ferrotianium aluminium carbon alloy of claim 1, is characterized in that: the water jacketed copper crucible alloy of mentioned component being placed in electric arc furnace, utilizes vacuum non-consumable arc furnace to carry out melting, and before melting, the back end vacuum of electric arc furnace is higher than 2.0 × 10
-2pa, arc-welding source current work scope is 300-500A, voltage power supply scope is 15-30V, smelting temperature is 2300-2800 DEG C, the each smelting time of single ingot casting is 3-4 minute, minimum 8 times of melt back, and the complete alloy pig of melting cools with crucible, after the uniform alloy of melting takes out from crucible, for casting the analysis of state alloy property or following process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510979939.1A CN105506376A (en) | 2015-12-24 | 2015-12-24 | Low-cost and high-strength titanium-iron-aluminum-carbon alloy |
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| CN201510979939.1A CN105506376A (en) | 2015-12-24 | 2015-12-24 | Low-cost and high-strength titanium-iron-aluminum-carbon alloy |
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| CN105506376A true CN105506376A (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN108149064A (en) * | 2017-12-19 | 2018-06-12 | 燕山大学 | A kind of high-strength high-plastic titanium ferro-aluminum silicon-carbon alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2423089A (en) * | 2005-02-11 | 2006-08-16 | Rolls Royce Plc | Beta titanium eutectoid alloys |
| CN105018791A (en) * | 2015-08-21 | 2015-11-04 | 燕山大学 | Titanium-iron-aluminum-carbon alloy |
| CN105112723A (en) * | 2015-08-21 | 2015-12-02 | 燕山大学 | Titanium-iron-carbon alloy with low cost and high strength |
-
2015
- 2015-12-24 CN CN201510979939.1A patent/CN105506376A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2423089A (en) * | 2005-02-11 | 2006-08-16 | Rolls Royce Plc | Beta titanium eutectoid alloys |
| CN105018791A (en) * | 2015-08-21 | 2015-11-04 | 燕山大学 | Titanium-iron-aluminum-carbon alloy |
| CN105112723A (en) * | 2015-08-21 | 2015-12-02 | 燕山大学 | Titanium-iron-carbon alloy with low cost and high strength |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN108149064A (en) * | 2017-12-19 | 2018-06-12 | 燕山大学 | A kind of high-strength high-plastic titanium ferro-aluminum silicon-carbon alloy |
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