CN102051561B - Heat-resistant titanium alloy material and preparation method thereof - Google Patents
Heat-resistant titanium alloy material and preparation method thereof Download PDFInfo
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- CN102051561B CN102051561B CN2011100074514A CN201110007451A CN102051561B CN 102051561 B CN102051561 B CN 102051561B CN 2011100074514 A CN2011100074514 A CN 2011100074514A CN 201110007451 A CN201110007451 A CN 201110007451A CN 102051561 B CN102051561 B CN 102051561B
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Abstract
The invention discloses a heat-resistant titanium alloy material and a preparation method thereof. The material adopts a titanium alloy as a substrate and metal wire clusters formed by alloy-steel wires and iron wires are distributed in the substrate; the diameter of each alloy steel wire and the diameter of each iron wire are 1mm to 2 mm; the diameter of each metal wire cluster is 10cm to 15cm; in the material, the total length of the iron wires is twice as long as that of the alloy-steel wires; and the volume percentage of the alloy-steel wires and the iron wires in the material is 10% to 35%. The heat-resistant titanium alloy material disclosed by the invention has higher heat resistance performance, low production cost and simple preparation technology.
Description
Technical field
The invention belongs to metal material field, relate to a kind of heat-resistant titanium alloy material and preparation method thereof.
Background technology
In metal material field, heat-resistant titanium alloy receives generally as heat-stable material always and paying attention to.
CN200710042304.4 discloses a kind of composite heat-resisting enhance titanium alloy, belongs to the rare metal technical field.Each component weight percent content is in this alloy: Al 3%-8%; Sn 1%-6%; Zr 1%-6%; Mo 0.5%-2%; Nb 0.5%-1.5%; Si 0.1%-0.8%; La 0.3%-1%; B 0.1%-0.5%; Ti is a surplus.But the resistance toheat of this alloy is still waiting further reinforcement.
Summary of the invention
The objective of the invention is provides a kind of heat-resistant titanium alloy material in order to strengthen the thermotolerance of titanium alloy material, and this material has good performance.
Another object of the present invention provides this heat-resistant titanium alloy preparation methods, and this preparing method's technology is simple, and production cost is low, is suitable for suitability for industrialized production.
The objective of the invention is to realize through following technical scheme:
A kind of heat-resistant titanium alloy material is characterized in that: this material is a matrix with the titanium alloy, the wire group that on matrix, is distributing and forming by alloy-steel wire and iron wire, and the diameter of alloy-steel wire and iron wire is 1-2mm; The diameter of wire group is 10-15cm, and the overall length of iron wire is equivalent to two times of alloy-steel wire in the material; The volume percent that two kinds of wires account for material is 10-35%;
The following chemical components in percentage by weight of titanium alloy substrate: Al is 2-3%, and Cu is 4%～6%, and Zr is 1-3%, and Gd is 1%～3%, and Si is 1%～3.5%, and all the other are Ti;
The following chemical components in percentage by weight of alloy-steel wire: Cr is 17-19%, and Ni is 8-10%, and Mo is 2-3%, and Ti is 0.6-1.1%, and C is 0.03-0.07%, and < 0.02%, < 0.02%, all the other are Fe to S to P;
The following chemical components in percentage by weight of iron wire is: C is 0.05-0.09, and Si is 0.2%～0.3%, and Mn is 0.25-0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P.
Also be distributed with compound TiN and TiB particle in the said matrix.
A kind of heat-resistant titanium alloy preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of alloy-steel wire and nitriding iron wire and boronising iron wire: directly for 1-2mm, composition weight percentage: Cr are 17-19%, Ni is 8-10% to cut-off respectively, and Mo is 2-3%, and Ti is 0.6-1.1%; C is 0.03-0.07%, and < 0.02%, S < 0.02% for P; All the other are the alloy-steel wire of Fe, and cut-off is 0.05-0.09 for 1-2mm, composition weight percentage C directly, and Si is 0.2%～0.3%; Mn is 0.25-0.35%, and < 0.02%, S < 0.025% for P; All the other are the iron wire of Fe, and the overall length of iron wire is equivalent to two times of alloy-steel wire, and the two volume percent that accounts for material altogether of control alloy-steel wire and iron wire is 10-35%; Prepare the nitriding iron wire by ordinary method at half iron wire surface carburization, second half iron wire surface boronizing prepares the boronising iron wire; The thickness of nitrided case and boride layer all is the 200-300 micron; Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains;
By the ordinary method of cleaning ball production above-mentioned alloy-steel wire and nitriding iron wire and boronising iron wire respectively being got a rhizoid forms globular and mixes three wire groups; Wire group's diameter is 10-15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity; The tightness of wire group guarantees that by the volume percent decision that alloy-steel wire and iron wire account for material altogether wire group just in time piles casting mold; The volume percent that the control iron wire accounts for material is 10-35%; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
The preparation of titanium alloy substrate: percentage composition A by weight
lBe 2-3%, Cu is 4%～6%, and Zr is 1-3%, and Gd is 1%～3%, and Si is 1%～35%, and all the other are prepared burden for Ti; Titanium alloy substrate melted in induction furnace make titanium alloy liquid, temperature of fusion is 1680-1720 ℃;
Above-mentioned titanium alloy liquid is poured into the dry sand casting mold that wire group is housed, and titanium alloy liquid surrounds alloy-steel wire and nitriding iron wire with the boronising iron wire, cooled and solidified then, obtain with the titanium alloy be matrix wherein be distributed with the heat-stable material that wire is rolled into a ball.
It is following that the present invention compares the beneficial effect of prior art:
(1) alloy-steel wire in the material of the present invention and iron wire self have suitable intensity and higher heat resistance.The high-temperature liquid state titanium in the Fe in the Ni in the alloy-steel wire, Cr and iron wire and the coating, N, B, the entering liquid titanium, forms TiN, TiB, TiCr with titanium with alloy part steel wire and iron wire fusion in cast
2, TiFe
2Deng special compound, disperse strengthens titanium alloy; Not molten alloy-steel wire and iron wire and titanium alloy metallurgical binding play the toughness reinforcing effect of enhancing to titanium alloy, and the effect that has heat-resisting enhancement, particularly TiN and TiB simultaneously is maximum.Cu and Si form Ti in titanium
3Si and CuTi
2Also titanium alloy is played and strengthen toughness reinforcing and heat-stable effect.
(2) Zr in the material and Gd and Ti do not form compound, and the tissue of titanium alloy is had the effect of remarkable refinement, help material to strengthen toughness reinforcing and heat-stable raising.
(3) P, S are impurity in the material of the present invention, are controlled at the scope of permission.
(4) alloy material cost of the present invention is low, and preparation technology is easy, and production cost is low, and the alloy material performance of production is good, and is convenient to very much suitability for industrialized production.
Titanium alloy provided by the invention still keeps good high-temperature intensity, creep resistance, over-all properties such as thermally-stabilised under 650-700 ℃, in the high temperature resistant field of space flight, aviation good application background is arranged.
Alloy property of the present invention is seen table 1.
Description of drawings
The metallographic structure of the heat-resistant titanium alloy material that Fig. 1 makes for the embodiment of the invention one.
Fig. 1 can see at titanium alloy and combining well with wire.
Embodiment
Each embodiment is only with of the present invention the explaining of opposing below
, and weight percent wherein all can change weight g, kg or other weight unit into.It is commercial that diameter in following examples is that alloy-steel wire and the iron wire of 1-2mm is, the nitrided case of iron wire and boride layer self-control.
Embodiment one:
The following chemical components in percentage by weight of alloy-steel wire: Cr is 17%, and Ni is 8%, and Mo is 2%, and Ti is 0.6%, and C is 0.03%, and < 0.02%, < 0.02%, all the other are Fe to S to P; The diameter of alloy-steel wire is 1mm.
The composition of iron wire is that C is 0.05%, and Si is 0.2%, and Mn is 0.25%, and < 0.02%, < 0.025%, all the other are Fe to S to P; The diameter of iron wire is 1mm.
The overall length of iron wire is equivalent to two times of alloy-steel wire, and the two volume percent that accounts for material altogether of control alloy-steel wire and iron wire is 10%.
Get half iron wire and prepare the nitriding iron wire according to the ordinary method nitriding, get second half iron wire and prepare the boronising iron wire according to the ordinary method boronising: the thickness of nitrided case and boride layer is 200 microns.Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains;
By the ordinary method of cleaning ball production above-mentioned alloy-steel wire and nitriding iron wire and boronising iron wire respectively being got a rhizoid forms globular and mixes three wire groups (three rhizoids are respectively got a moulding simultaneously; Form three wire groups; Moulding can be made by the cleaning ball of the usefulness that washes the dishes or the method for title steel wire lump); Wire group's diameter is 15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity, and the tightness of wire group guarantees that by the volume percent decision that alloy-steel wire and iron wire account for material altogether wire group just in time piles casting mold; The volume percent that the control iron wire accounts for material is 10%; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
Titanium alloy substrate is prepared: the weight percentage of pressing composition: A
lBe 2%, Cu is 4%, and Zr is 1%, and Gd is 1%, and Si is 1%, and all the other are prepared burden for Ti.The titanium alloy substrate raw material melted in induction furnace make titanium alloy liquid, temperature of fusion is 1695-1705 ℃;
Above-mentioned titanium alloy liquid is poured into the dry sand casting mold that wire group is housed, and titanium alloy liquid surrounds alloy-steel wire and nitriding iron wire with the boronising iron wire, cooled and solidified then, obtain with the titanium alloy be matrix wherein be distributed with the heat-stable material that wire is rolled into a ball.
Embodiment two:
The titanium alloy substrate composition is percentage composition by weight: A
lBe 3%, Cu is 6%, and Zr is 3%, and Gd is 3%, and Si is 3%, and all the other are prepared burden for Ti.
The following chemical components in percentage by weight of alloy-steel wire: Cr is 19%, and Ni is 10%, and Mo is 3%, and Ti is 1.1%, and C is 0.07%, and < 0.02%, < 0.02%, all the other are Fe to S to P; The diameter of this alloy-steel wire is 2mm.
The following chemical components in percentage by weight of iron wire: C is 0.09%, and Si is 0.3%, and Mn is 0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P; The diameter of this iron wire is 2mm.
The overall length of iron wire is equivalent to two times of alloy-steel wire, and the volume percent that two kinds of wires account for material altogether is 35%.
Get half iron wire and prepare the nitriding iron wire according to the ordinary method nitriding, get second half iron wire and prepare the boronising iron wire according to the ordinary method boronising: the thickness of nitrided case and boride layer is 300 microns.Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains; By three wire groups that the ordinary method of cleaning ball production is made three kinds of wires mixing that obtain, wire group diameter is 10cm.
The preparation process is with embodiment one.
Embodiment three:
The titanium alloy substrate composition is percentage composition by weight: A
lBe 2.5%, Cu is 5%, and Zr is 2%, and Gd is 2%, and Si is 2%, and all the other are prepared burden for Ti.
The following chemical components in percentage by weight of alloy-steel wire: Cr is 18%, and Ni is 9%, and Mo is 2.5%, and Ti is 0.8%, and C is 0.05%, and < 0.02%, < 0.02%, all the other are Fe to S to P; The diameter of this alloy-steel wire is 1.5mm.
The following chemical components in percentage by weight of iron wire: C is 0.07%, and Si is 0.25%, and Mn is 0.3%, and < 0.02%, < 0.025%, all the other are Fe to S to P; The diameter of this iron wire is 1.5mm.
The overall length of iron wire is equivalent to two times of alloy-steel wire, and the volume percent that two kinds of wires account for material altogether is 20%.
Get half iron wire and prepare the nitriding iron wire by the ordinary method nitriding, get second half iron wire and prepare the boronising iron wire by the ordinary method boronising: the thickness of nitrided case and boride layer is 250 microns.Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains; By three wire groups that the ordinary method of cleaning ball production is made three kinds of wires mixing that obtain, wire group diameter is 15cm.
The preparation process is with embodiment one.
The comparative example four: proportioning raw materials is within the scope of the present invention instance not
The titanium alloy substrate composition is percentage composition by weight: A
lBe 1%, Cu is 3%, and Zr is 1%, and Gd is 0.43%, and Si is 0.6%, and all the other are prepared burden for Ti.
The following chemical components in percentage by weight of alloy-steel wire: Cr is 16%, and Ni is 6%, and Mo is 1%, and Ti is 0.4%, and C is 0.02%, and < 0.02%, < 0.02%, all the other are Fe to S to P; The diameter of this alloy-steel wire is 0.5mm.
The following chemical components in percentage by weight of iron wire: C is 0.04%, and Si is 0.1%, and Mn is 0.2%, and < 0.02%, < 0.025%, all the other are Fe to S to P; The diameter of this iron wire is 0.5mm.
The overall length of iron wire is equivalent to two times of alloy-steel wire, and the volume percent that two kinds of wires account for material is 5%.
Iron wire does not carry out nitriding and boronising to be handled, and makes three one metal wires (wherein two strands are iron wire, one alloy-steel wire), the three wire groups of blended that obtain by the ordinary method of cleaning ball production, and wire group diameter is 15cm.
The preparation process is with embodiment one.
The comparative example five: proportioning raw materials is within the scope of the present invention instance not
The titanium alloy substrate composition is percentage composition by weight: A
lBe 4%, Cu is 7%, and Zr is 4%, and Gd is 4%, and Si is 4%, and all the other are prepared burden for Ti.
The following chemical components in percentage by weight of alloy-steel wire: Cr is 20%, and Ni is 11%, and Mo is 4%, and Ti is 1.5%, and C is 0.08%, and < 0.02%, < 0.02%, all the other are Fe to S to P; The diameter of this alloy-steel wire is 3mm.
The following chemical components in percentage by weight of iron wire: C is 0.1%, and Si is 0.4%, and Mn is 0.4%, and < 0.02%, < 0.025%, all the other are Fe to S to P; The diameter of this iron wire is 3mm.
The overall length of iron wire is equivalent to two times of alloy-steel wire, and the volume percent that two kinds of wires account for material is 40%.
Get half iron wire and prepare the nitriding iron wire by the ordinary method nitriding, get second half iron wire and prepare the boronising iron wire by the ordinary method boronising: the thickness of nitrided case and boride layer is 400 microns.Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains; By three wire groups that the ordinary method of cleaning ball production is made three kinds of wires mixing that obtain, wire group diameter is 10cm.
The preparation process is with embodiment one.
Each performance of products contrast of table 1
From table, can find out the A in the titanium alloy substrate of the present invention
l, Cu, Zr, Gd, Si increase the mechanical property that is beneficial to alloy and improve; But some element such as Cu, Fe, A
lIt is too much to cross the compound that forms at most, can weaken the toughness of alloy, has therefore reduced thermotolerance.Some element such as Zr, Gd are too much, cause the element waste.
Cr in the alloy-steel wire, Ni, Mo, Ti, C increase the mechanical property that is beneficial to steel wire itself and improve; Cross the intensity and the toughness that can weaken steel wire at most.
Composition C in the iron wire, Si, Mn increase the mechanical property that is beneficial to alloy and improve; Too much weaken the resistance toheat of alloy.
The increase of alloy-steel wire and two kinds of wire volume percent of iron wire is beneficial to the heat-stable raising of material.But too much, the titanium alloy substrate bag does not live alloy-steel wire and nitriding iron wire and boronising iron wire, and crackle appears in matrix, has then reduced the heat-resisting of material.Therefore influence the resistance to corrosion of alloy.Like product 5.
Wire diameter is too little simultaneously, and surface-area is too big, is unfavorable for the dissolving of infiltration layer element in titanium water; Otherwise wire diameter is too big, and the density that in titanium alloy substrate, distributes reduces, and is unfavorable for the heat-stable raising of material monolithic again.
Claims (1)
1. heat-resistant titanium alloy preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of alloy-steel wire and nitriding iron wire and boronising iron wire: directly for 1-2mm, composition weight percentage: Cr are 17-19%, Ni is 8-10% to cut-off respectively, and Mo is 2-3%, and Ti is 0.6-1.1%; C is 0.03-0.07%, and < 0.02%, S < 0.02% for P; All the other are the alloy-steel wire of Fe, and cut-off is 0.05-0.09 for 1-2mm, composition weight percentage C directly, and Si is 0.2%～0.3%; Mn is 0.25-0.35%, and < 0.02%, S < 0.025% for P; All the other are the iron wire of Fe, and the overall length of iron wire is equivalent to two times of alloy-steel wire, and the two volume percent that accounts for material altogether of control alloy-steel wire and iron wire is 10-35%; Prepare the nitriding iron wire by ordinary method at half iron wire surface carburization, second half iron wire surface boronizing prepares the boronising iron wire; The thickness of nitrided case and boride layer all is the 200-300 micron; Alloy-steel wire is suitable with boronising iron wire three overall length with the nitriding iron wire that obtains;
By the ordinary method of cleaning ball production above-mentioned alloy-steel wire, nitriding iron wire and boronising iron wire are respectively got a rhizoid and form three wire groups of globular mixing; Wire group's diameter is 10-15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity; The tightness of wire group guarantees that by the volume percent decision that alloy-steel wire and iron wire account for material altogether wire group just in time piles casting mold; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
The preparation of titanium alloy substrate: percentage composition A by weight
lBe 2-3%, Cu is 4%～6%, and Zr is 1-3%, and Gd is 1%～3%, and Si is 1%～35%, and all the other are prepared burden for Ti; Titanium alloy substrate melted in induction furnace make titanium alloy liquid, temperature of fusion is 1680-1720 ℃;
Above-mentioned titanium alloy liquid is poured into the dry sand casting mold that wire group is housed, and titanium alloy liquid surrounds alloy-steel wire and nitriding iron wire with the boronising iron wire, cooled and solidified then, obtain with the titanium alloy be matrix wherein be distributed with the heat-stable material that wire is rolled into a ball.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426000A (en) * | 1992-08-05 | 1995-06-20 | Alliedsignal Inc. | Coated reinforcing fibers, composites and methods |
| JP3002338B2 (en) * | 1992-09-21 | 2000-01-24 | 東洋機械金属株式会社 | Die casting machine |
| CN1310769A (en) * | 1998-07-21 | 2001-08-29 | 株式会社丰田中央研究所 | Titanium-based composition material, method for producing the same and engine valve |
| CN1639380A (en) * | 2002-03-27 | 2005-07-13 | 独立行政法人科学技术振兴机构 | Heat-resistant material Ti alloy material excellent in resistance to corrosion at high temperature and to oxidation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH032338A (en) * | 1989-05-30 | 1991-01-08 | Sumitomo Electric Ind Ltd | Composite reinforced alloy and its manufacture |
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- 2011-01-14 CN CN2011100074514A patent/CN102051561B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426000A (en) * | 1992-08-05 | 1995-06-20 | Alliedsignal Inc. | Coated reinforcing fibers, composites and methods |
| JP3002338B2 (en) * | 1992-09-21 | 2000-01-24 | 東洋機械金属株式会社 | Die casting machine |
| CN1310769A (en) * | 1998-07-21 | 2001-08-29 | 株式会社丰田中央研究所 | Titanium-based composition material, method for producing the same and engine valve |
| CN1639380A (en) * | 2002-03-27 | 2005-07-13 | 独立行政法人科学技术振兴机构 | Heat-resistant material Ti alloy material excellent in resistance to corrosion at high temperature and to oxidation |
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