CN105088014B - A kind of low-cost high-strength Ti Fe alloy blanks and its preparation technology - Google Patents
A kind of low-cost high-strength Ti Fe alloy blanks and its preparation technology Download PDFInfo
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Abstract
A kind of inexpensive superhigh intensity Ti Fe alloy blanks, belong to field of metal alloy technology.The percentage by weight composition of the alloy composition：Fe：7.0～12.0%, Al：3.0%, C：0.01～0.02%, balance of Ti and inevitable impurity.The alloy adopts ingot iron, 45 steel machining iron filings, commercial-purity aluminium etc. for raw material mixing briquet, with vacuum levitation melting stove secondary smelting into alloy cast ingot.Ti Fe alloy blanks are prepared using forging and stress relief annealing technique, its tensile strength is 1281～1443MPa, and elongation percentage is 2.60～7.00%.The invention provides a kind of inexpensive superhigh intensity Ti Fe alloys, reduce the titanium alloy cost of raw material, widened the processing interval of alloy, it is easy to produce, the intensity and moulding index of titanium alloy armor are met.
Description
Technical field
The invention belongs to field of metal alloy technology, and in particular to a kind of superhigh intensity titanium alloy with Ti-Fe as base, its
Feature is low raw-material cost, with wider process window so that chooses and widens process window from raw material and carrys out cost of implementation
Reduction, purpose be exploitation be mainly used in bearing the structural material of dead load, alternate load and shock loading.
Background technology
The development of armour material is through four-stage, i.e. armour steel, armour aluminum alloy, armoring composite ceramics and armoring titanium
Alloy.Titanium alloy is because having the performances such as high specific strength, the extremely strong and preferable low-temperature flexibility of corrosion resistance, and is applied to armour material.
However, the high cost of titanium alloy and processing technology complexity limit titanium alloy being widely popularized in armour material.Therefore, it is necessary to
Carry out the research with regard to low-cost titanium alloy and its technology of preparing.Reducing material cost has three kinds of effective ways, i.e., using cheap
Alloying element, reduce material processing cost and adopt near-net-shape technology.This research is from using inexpensive alloy element and drop
Two aspects of processing cost of low material are started with and carry out developing low-cost high strength titanium alloy.
Used as inexpensive alloy element, ferro element is β phase stable elements, improves the cold and hot working ability of titanium alloy material.Weight
Want, iron can be greatly enhanced the intensity of alloy as the solution strengthening element of titanium alloy.On German board automobile LupoFSI
Suspension spring titanium alloy T i-1.5Fe-6.8Mo-1.5Al has the characteristics such as elastic modelling quantity is low, intensity is high, but Mo elements price is more
It is expensive；Super-TIX51F alloy Ti-5Al-1Fe intensity is up to 1000MPa, but its processing characteristics cannot be guaranteed.Therefore, originally
The main exploitation of research is with low cost, superhigh intensity, the beta titanium alloy with larger cold and hot working potentiality.
The content of the invention
It is an object of the invention to provide a kind of low cost of the Al element additional hardenings with Ti-Fe as base, superhigh intensity
Titanium alloy and suitable heat processing technique, that is, find forging and the Technology for Heating Processing of suitable inexpensive alloy composition and optimization, and
Become the structural material that can bear dead load, alternate load and shock loading.
Technical scheme：A kind of inexpensive superhigh intensity Ti-Fe system alloy, it is characterised in that each component and its weight in alloy
Measuring percentage composition is：Fe contents be 7.0～12.0%, Al content is 3.0%, C content be 0.01～0.02%, balance of Ti and
Inevitable impurity.
Prepare the preparation technology of above-mentioned inexpensive superelevation strength titanium alloy, it is characterised in that comprise the following steps：
(1) with titanium sponge, cheap No. 45 steel machining chips, ingot iron and commercial-purity aluminiums as raw material, carry out
Degreasing processes, mixes and be pressed into alloy block.
(2) to alloy block melting obtained by step (1), adopt equipment for vacuum suspension induction furnace, smelting temperature be 1700～
1850 DEG C, alloy cast ingot is obtained through remelting twice；
(3) alloy cast ingot obtained by step (2) is forged and stress relief annealing, the cogging temperature of forging is 880～920
DEG C, finish forge temperature is 820～850 DEG C, water quenching；Stress relief annealing temperature be 500～550 DEG C, the time be 0.5～1h, air cooling.
Advantages of the present invention：Compared with conventional titanium alloy, the alloying elements such as molybdenum, the vanadium of costliness, drop in alloy, are not contained
The low cost of raw material of alloy, and suitable wider heat processing technique is found, reduce processing cost.Prepare with excellent
The Ti-Fe systems alloy of different comprehensive mechanical property, is embodied in superhigh intensity and meets the elongation percentage of use requirement, and tension is strong
Spend for 1281～1443MPa, elongation percentage is 2.60～7.00%, is had broad application prospects in engineering field.
Description of the drawings
Fig. 1 forging state Ti-7Fe-3Al-0.02C alloy different temperatures, the corresponding microhardness value comparison diagram of time annealing.
The mechanical curves of Fig. 2 annealed states Ti-Fe system.
Fig. 3 forging state Ti-10Fe-3Al-0.02C alloy different temperatures, the corresponding microhardness value comparison diagram of time annealing.
Fig. 4 forging state Ti-12Fe-3Al-0.02C alloy different temperatures, the corresponding microhardness value comparison diagram of time annealing.
Specific embodiment
It is described in further details with reference to embodiment, but the present invention is not limited to following examples.
Low cost high strength titanium alloy：The weight alloy percentage is consisted of：Fe contents are 7.0～12.0%, Al content
For 3.0%, C content is 0.01～0.02%, balance of Ti and inevitable impurity.
The preparation of inexpensive Ti-Fe-Al-C titanium alloys：Raw material be 0 grade of titanium sponge, 99.3% ingot iron,
99.5% commercial-purity aluminium, industrial 45 carbon steel machining iron filings, carry out degreasing process, by composition proportion ingredient and mix equal
It is even, and the briquet on forcing press.Briquetting melting on 5KG vacuum suspension induction furnaces, smelting temperature are 1700 DEG C～1850
DEG C, carrying out remelting twice and obtain titan alloy casting ingot, by ingot casting descale, go end to end, Jing coggings are forged, are finally forged into rod
Material, sheet material.Between 880 DEG C～920 DEG C, final finish forge temperature is between 820 DEG C～850 DEG C for cogging heating-up temperature.
Embodiment 1
By nominal composition Ti-7Fe-3Al-0.02C (percentage by weight, %) alloyage raw material, raw material are extra large using 0 grade
Continuous titanium, 99.3% ingot iron, 99.5% commercial-purity aluminium, industrial 45 steel machining iron filings, carry out degreasing process.It is mixed
After material on 200 t hydraulic press briquet, obtain alloy cast ingot twice with the induction furnace melting of 5KG vacuum suspensions, ingot casting Jing takes off
After skin process, glass protecting lubricant is smeared, High Temperature Oxidation is prevented.In 920 DEG C of cogging forgings, subsequently enter at 850 DEG C
The many fire time piers of row are pulled out with thinning microstructure, are finally swaged into the bar of φ 12mm, Water Quenching.Forging state Alloy At Room Temperature mechanical property：It is anti-
Tensile strength is 1380MPa, and elongation percentage is 2.8%.(as subordinate list 1 is illustrated)
By the stress relief annealing technique of optimized alloy, can be searched out by alloy rigidity value after different temperatures, time annealing
Its optimal stress relief annealing technique is 550 DEG C/1h/AC (accompanying drawing 1 is illustrated), and the room of bar-shaped blank is obtained under this annealing process
Warm mechanical property：Tensile strength 1371MPa, elongation percentage are 2.6%.(as accompanying drawing 2 is illustrated)
Embodiment 2
By nominal composition Ti-10Fe-3Al-0.02C (percentage by weight, %) alloyage raw material, raw material use 0 grade
Titanium sponge, 99.3% ingot iron, 99.5% commercial-purity aluminium, industrial 45 steel machining iron filings, carry out degreasing process.
After batch mixing on 200 t hydraulic press briquet, obtain alloy cast ingot, ingot casting Jing twice with the induction furnace melting of 5KG vacuum suspensions
Strip off the skin after process, smear glass protecting lubricant, prevent High Temperature Oxidation.In 880 DEG C of cogging forgings, subsequently at 820 DEG C
Carry out many fire time piers to pull out with thinning microstructure, be finally swaged into the bar of φ 12mm, Water Quenching.Forging state Alloy At Room Temperature mechanical property：
Tensile strength is 1281MPa, and elongation percentage is 5.36%.(as subordinate list 1 is illustrated)
By the stress relief annealing technique of optimized alloy, after different temperatures, time annealing, alloy rigidity value can search out which
Optimal stress relief annealing technique is 550 DEG C/1h/AC (accompanying drawing 3 is illustrated), obtains the room-temperature mechanical property of bar-shaped blank：Tension
Intensity 1429MPa, elongation percentage are 4.00%.(as accompanying drawing 1 is illustrated)
Embodiment 3
By nominal composition Ti-12Fe-3Al-0.02C (percentage by weight, %) alloyage raw material, raw material use 0 grade
Titanium sponge, 99.3% ingot iron, 99.5% commercial-purity aluminium, industrial 45 steel machining iron filings, carry out degreasing process.
After batch mixing on 200 t hydraulic press briquet, obtain alloy cast ingot, ingot casting Jing twice with the induction furnace melting of 5KG vacuum suspensions
Strip off the skin after process, smear glass protecting lubricant, prevent High Temperature Oxidation.In 880 DEG C of cogging forgings, subsequently at 820 DEG C
Carry out many fire time piers to pull out with thinning microstructure, be finally swaged into the bar of φ 12mm, Water Quenching.Forging state Alloy At Room Temperature mechanical property：
Tensile strength is 1385MPa, and elongation percentage is 8.92%.(as subordinate list 1 is illustrated)
By the stress relief annealing technique of optimized alloy, after different temperatures, time annealing, alloy rigidity value searches out which most
Good stress relief annealing technique is 500 DEG C/0.5h/AC (accompanying drawing 4 is illustrated), obtains the room-temperature mechanical property of bar-shaped blank：Tension
Intensity 1443MPa, elongation percentage are 7.00%.(as accompanying drawing 1 is illustrated)
The mechanical property parameters of forging state Ti-Fe of table 1 system alloy
| Nominal composition | Tensile strength/MPa | Elongation percentage/% |
| Ti-7Fe-3Al-0.02C | 1380 | 2.80 |
| Ti-10Fe-3Al-0.02C | 1281 | 5.36 |
| Ti-12Fe-3Al-0.02C | 1385 | 8.92 |
Claims (3)
1. a kind of inexpensive superhigh intensity Ti-Fe system alloy, it is characterised in that each component and its weight percentage in alloy
For：Fe contents are 10.0% or 12.0%, and Al content is 3.0%, and C content is 0.01～0.02%, balance of Ti and can not be kept away
Exempt from impurity, its preparation method is comprised the following steps：
(1) with titanium sponge, cheap No. 45 steel machining chips, ingot iron and commercial-purity aluminiums as raw material, deoiled
It is dirty to process, mix and be pressed into alloy block；
(2) to alloy block melting obtained by step (1), equipment is adopted for vacuum suspension induction furnace, smelting temperature is 1700～1850
DEG C, alloy cast ingot is obtained through remelting twice；
(3) alloy cast ingot obtained by step (2) is forged and stress relief annealing, the cogging temperature of forging is 880～920 DEG C,
Finish forge temperature is 820～850 DEG C, water quenching；Stress relief annealing temperature be 500～550 DEG C, the time be 0.5～1h, air cooling.
2. the method for preparing the inexpensive superhigh intensity Ti-Fe system alloy described in claim 1, it is characterised in that (1) with sponge
Titanium, cheap No. 45 steel machining chips, ingot iron and commercial-purity aluminiums are raw material, carry out degreasing process, mixing simultaneously
It is pressed into alloy block；
(2) to alloy block melting obtained by step (1), equipment is adopted for vacuum suspension induction furnace, smelting temperature is 1700～1850
DEG C, alloy cast ingot is obtained through remelting twice；
(3) alloy cast ingot obtained by step (2) is forged and stress relief annealing, the cogging temperature of forging is 880～920 DEG C,
Finish forge temperature is 820～850 DEG C, water quenching；Stress relief annealing temperature be 500～550 DEG C, the time be 0.5～1h, air cooling.
3. method according to claim 2, it is characterised in that the tensile strength of forging rear annealing state alloy is 1281～1443MPa,
Elongation percentage is 2.60～7.00%.
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| CN109554567B (en) * | 2018-12-20 | 2020-05-22 | 广东省材料与加工研究所 | Ti-Fe alloy based composite material and preparation method thereof |
| CN114672694B (en) * | 2022-03-30 | 2022-08-16 | 北京工业大学 | Preparation method of near-alpha type high-temperature titanium alloy |
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