CN101229586A - Method of manufacturing 300M ultrahigh strength steel aircraft landing gear - Google Patents
Method of manufacturing 300M ultrahigh strength steel aircraft landing gear Download PDFInfo
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- CN101229586A CN101229586A CNA2008100103089A CN200810010308A CN101229586A CN 101229586 A CN101229586 A CN 101229586A CN A2008100103089 A CNA2008100103089 A CN A2008100103089A CN 200810010308 A CN200810010308 A CN 200810010308A CN 101229586 A CN101229586 A CN 101229586A
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- strength steel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to a method for manufacturing a 300M ultrahigh strength steel aircraft landing gear. 300M unimach boards, steel bars or forging parts are mechanically processed into fine bars and then produced into powder; by adopting laser forming technology, according to a three-dimensional number module of parts of an outer cylinder, a piston rods, etc. of the landing gear, the 300M ultrahigh strength steel powder is melted and deposited layer by layer until is piled up as designed part blanks; finally the 300M ultrahigh strength steel whole landing gear is obtained through a routine digital control mechanical process. The invention initially utilizes laser melting deposition (laser fast forming) technology in a creative way, which realizes the manufacture of the 300M ultrahigh strength steel whole landing gear without forging process and special requirement for the specification of raw materials and greatly reduces deep-hole mechanical cutting output. The structure, the components and the properties of the parts are equal to the parts manufactured with the forging part; manufacturing difficulty is obviously reduced, manufacturing cost is reduced by 2/3 and manufacturing period is reduced by more than 1/2.
Description
Technical field
The present invention relates to laser forming technology and super-high strength steel material, the manufacture method of 300M ultrahigh strength steel aircraft landing gear is provided especially.
Background technology
300M steel (40CrNi2Si2MoVA) is a kind of low-alloy super-strength steel, has superhigh intensity, good horizontal plastic property, fracture toughness, anti-fatigue performance and anti-stress corrosion performance, is the preferential the selection of material of present generation aircraft landing gear structure.Because the 300M steel is not recommended welding, so the integral piece mode that adopts more.Its raw material mainly contain bar, sheet material, silk material, tubing, forging etc.
The whole undercarriage of 300M steel can be avoided welding issuable defective workmanship and fault in material, helps improving the fatigue life of undercarriage.
But it is big, complex-shaped that the whole undercarriage of 300M contains area, and blanking weighs more than 1 ton, needs big format diameter bar ( 500), and the forging difficulty is big, is easy to generate macroscopic coarse grain; Simultaneously, grinding technique problem after needs whole undercarriage deep hole machining of solution and the heat treatment.These factors finally cause the manufacturing cost of undercarriage to be multiplied.
Therefore, the forging of 300M solid forging undercarriage and deep hole machining technical difficulty and great number manufacturing cost are its subject matter that faces.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing the laser forming technology to make the 300M ultrahigh strength steel aircraft landing gear, by the undercarriage part of this method manufacturing, its structural behaviour and forging are suitable, and manufacture difficulty significantly reduces, manufacturing cost reduces by 2/3, and the manufacturing cycle reduces over half.
The invention provides a kind of manufacture method of 300M ultrahigh strength steel aircraft landing gear, adopt the fusing of vacuum noncontact plasma, powder is made in thin excellent argon gas atomizing after sheet material, bar or the forging machining of 300M super-high strength steel, with the canned supply of powder atomization attitude vacuum, wherein powder 70% is a spherical powder, need screening and dry, granularity is 100～300 orders; Utilize the laser forming technology, according to the three-dimensional digital-to-analogue of parts such as undercarriage urceolus, piston rod, with 300M super-high strength steel powder melt deposition successively, until being piled into designed part blank, the numerical controlled machinery processing by routine at last promptly can be made into the whole undercarriage of 300M steel.Wherein the main technologic parameters of laser forming technology is:
Laser beam power: 3.0～10kW, preferred 8.5～10kW
Laser beam spot diameter: 3～6mm, preferred 4～5mm
Sweep speed: 5～10mm/min, preferred 6～8mm/min
Powder mass flow scope: 10～30g/min, preferred 18～22g/min
Monolayer deposition thickness: be not higher than 0.8mm, preferred 0.5～0.6mm.
The manufacture method of 300M ultrahigh strength steel aircraft landing gear provided by the invention, this manufacture method also comprise other super-high strength steel undercarriage that is suitable for laser fast forming except that suitable 300M super-high strength steel, make undercarriage as the Aermet100 steel.
The present invention creatively utilizes laser fusion deposition (laser fast forming) technology first, realized the whole undercarriage manufacturing of 300M steel, and do not need to forge, specifications of raw materials there is not specific (special) requirements, deep hole machine cut amount reduces significantly, the made part of the tissue of part, composition, performance and forging is suitable, and manufacturing cost reduces significantly, and aspects such as manufacture difficulty, manufacturing cost, manufacturing cycle all have significant advantage.
The specific embodiment
Embodiment 1
The 300M raw material are processed into the bar of the about 15 * 15mm in cross section, and length 1000mm according to the requirement of laser forming manufacturing technology, adopts that the fusing of vacuum noncontact plasma---the argon gas atomization technique prepares powder, with the canned supply of powder atomization attitude vacuum.Powder 70% is a spherical powder, and through screening and dry, granularity needs to determine according to part and technology, is generally 100～300 orders; Utilize laser fusion depositing device and technology, carry out the part near-net forming according to the three-dimensional digital-to-analogue of part.
300M powdered steel percentage composition is Si1.57, Cr0.87, Mn0.67, Fe94.66, Ni1.76, Mo0.35, V0.11; Adopt CO
2Laser instrument, power output are 8500W, and spot diameter is 4mm, focal length 500mm, and sweep speed: 6mm/min, powder mass flow: 18g/min, monolayer deposition thickness: 0.5mm protects with argon purge.
Table 1 300M steel laser forming outer tube part room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1991 | 1685 | 10.4 | 39.4 |
| 1994 | 1688 | 10.3 | 41.6 | |
| 1998 | 1692 | 10.7 | 42.2 | |
| Laterally | 1982 | 1675 | 8.8 | 35.0 |
| 1987 | 1687 | 7.8 | 33.0 | |
| 1977 | 1657 | 8.7 | 32.2 |
As can be seen from Table 1, by the room temperature tensile excellent performance of 300M steel laser forming undercarriage outer tube part, its intensity and plasticity have reached the forging level, and the intensity between the vertical and horizontal is basic identical.
Table 2 300M steel laser forming piston rod member room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1989 | 1963 | 10.5 | 48.0 |
| 1991 | 1667 | 12.0 | 49.1 | |
| 1988 | 1674 | 11.5 | 50.1 | |
| Horizontal | 1995 | 1678 | 10.5 | 42.4 |
| To | 1985 | 1661 | 10.7 | 39.5 |
| 1984 | 1650 | 10.4 | 41.6 |
As can be seen from Table 2, suitable substantially with forging by 300M steel laser forming piston rod member room temperature tensile performance, plasticity, the intensity between the vertical and horizontal is basic identical.
By the test data in table 1, the table 2 as can be known, 300M steel laser forming spare has good room temperature tensile intensity and plasticity, has reached the forging level substantially.
Embodiment 2
Other conditions adopt CO with embodiment 1
2Laser instrument, power output are 9000W, and spot diameter is 4mm, focal length 500mm, and sweep speed: 7mm/min, powder mass flow: 19g/min, monolayer deposition thickness: 0.5mm protects with argon purge.
The room temperature tensile performance and the plasticity of same test 300M steel laser forming undercarriage outer tube part, piston rod member, the result is as follows:
Table 3 300M steel laser forming outer tube part room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1990 | 1675 | 10.2 | 40.0 |
| 1998 | 1682 | 9.9 | 42.5 | |
| 1995 | 1680 | 10.0 | 42.0 | |
| Laterally | 1980 | 1664 | 8.0 | 33.0 |
| 1990 | 1672 | 7.5 | 36.0 | |
| 1984 | 1660 | 8.1 | 33.5 |
Table 4 300M steel laser forming piston rod member room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1983 | 1967 | 10.5 | 47.0 |
| 1990 | 1672 | 12.3 | 46.5 | |
| 1986 | 1680 | 11.2 | 48.2 |
| Laterally | 1991 | 1675 | 10.2 | 41.4 |
| 1980 | 1660 | 10.4 | 40.5 | |
| 1985 | 1656 | 10.6 | 41.0 |
Show that room temperature tensile performance, plasticity and forging are suitable substantially, the intensity between the vertical and horizontal is basic identical.
By the test data in table 3, the table 4 as can be known, 300M steel laser forming spare has good room temperature tensile intensity and plasticity, has reached the forging level substantially.
Embodiment 3
Other conditions adopt CO with embodiment 1
2Laser instrument, power output are 10000W, and spot diameter is 5mm, focal length 500mm, and sweep speed: 8mm/min, powder mass flow: 20g/min, monolayer deposition thickness: 0.6mm protects with argon purge.
The room temperature tensile performance and the plasticity of same test 300M steel laser forming undercarriage outer tube part, piston rod member, the result is as follows:
Table 5 300M steel laser forming outer tube part room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1992 | 1678 | 10.4 | 40.4 |
| 1995 | 1680 | 10.5 | 41.5 | |
| 1997 | 1685 | 10.8 | 42.0 | |
| Laterally | 1985 | 1675 | 8.2 | 32.0 |
| 1990 | 1682 | 7.9 | 35.0 | |
| 1980 | 1660 | 8.4 | 33.2 |
Table 6 300M steel laser forming piston rod member room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertical | 1986 | 1963 | 10.5 | 47.0 |
| To | 1990 | 1670 | 11.5 | 46.2 |
| 1982 | 1673 | 11.0 | 49.2 | |
| Laterally | 1990 | 1677 | 10.2 | 41.4 |
| 1978 | 1665 | 10.3 | 40.5 | |
| 1980 | 1656 | 10.8 | 41.6 |
Show that room temperature tensile performance, plasticity and forging are suitable substantially, the intensity between the vertical and horizontal is basic identical.
By the test data in table 5, the table 6 as can be known, 300M steel laser forming spare has good room temperature tensile intensity and plasticity, has reached the forging level substantially.
Embodiment 4
Other conditions adopt CO with embodiment 1
2Laser instrument, power output are 6000W, and spot diameter is 4mm, focal length 500mm, and sweep speed: 6mm/min, powder mass flow: 18g/min, monolayer deposition thickness: 0.5mm protects with argon purge.
The room temperature tensile performance and the plasticity of test 300M steel laser forming undercarriage outer tube part, piston rod member, the result is as follows:
Table 7 300M steel laser forming outer tube part room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1981 | 1675 | 9.4 | 40.4 |
| 1984 | 1678 | 9.3 | 44.6 | |
| 1988 | 1672 | 9.7 | 45.2 | |
| Laterally | 1970 | 1675 | 7.8 | 36.0 |
| 1967 | 1687 | 6.8 | 34.0 | |
| 1975 | 1657 | 7.7 | 33.2 |
Table 8 300M steel laser forming piston rod member room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1979 | 1963 | 9.8 | 52.0 |
| 1971 | 1667 | 10.0 | 54.1 | |
| 1982 | 1674 | 9.7 | 50.1 | |
| Laterally | 1985 | 1674 | 8.8 | 45.4 |
| 1975 | 1658 | 8.7 | 42.5 | |
| 1980 | 1645 | 10.4 | 40.6 |
Show that room temperature tensile performance, plasticity and forging are suitable substantially, the intensity between the vertical and horizontal is basic identical.
By the test data in table 7, the table 8 as can be known, 300M steel laser forming spare has good room temperature tensile intensity and plasticity, has reached the forging level substantially.
Comparative example
Other conditions adopt CO with embodiment 1
2Laser instrument, power output are 2000W, and spot diameter is 3mm, focal length 500mm, and sweep speed: 11mm/min, powder mass flow: 35g/min, monolayer deposition thickness: 0.7mm protects with argon purge.
Table 9 300M steel laser forming outer tube part room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1781 | 1575 | 8.4 | 50.4 |
| 1784 | 1568 | 8.3 | 51.6 | |
| 1790 | 1572 | 7.7 | 52.2 | |
| Laterally | 1784 | 1575 | 6.8 | 45.0 |
| 1787 | 1570 | 6.8 | 43.0 | |
| 1778 | 1567 | 6.7 | 42.2 |
Table 10 300M steel laser forming piston rod member room temperature tensile performance
| Orientation | σ b(MPa) | σ 0.2(MPa) | δ 5 | ψ |
| Vertically | 1789 | 1763 | 8.0 | 50.0 |
| 1791 | 1567 | 7.0 | 49.1 | |
| 1788 | 1574 | 7.5 | 50.1 | |
| Laterally | 1795 | 1578 | 7.5 | 45.4 |
| 1785 | 1621 | 7.7 | 44.5 | |
| 1784 | 1590 | 7.4 | 52.6 |
As can be seen, general by the room temperature tensile performance of 300M steel laser forming undercarriage outer tube part, its intensity and plasticity are lower than the forging level from table 9,10, and the intensity between the vertical and horizontal is basic identical.By Dynamic Non-Destruction Measurement, find that there is more micro-crack its inside, and be mingled with not penetration powder and cavity.
Claims (3)
1. the manufacture method of a 300M ultrahigh strength steel aircraft landing gear is characterized in that:
---adopt the fusing of vacuum noncontact plasma, powder is made in thin excellent argon gas atomizing after sheet material, bar or the forging machining of 300M super-high strength steel, and with the canned supply of powder atomization attitude vacuum, wherein powder 70% is a spherical powder, need screening and dry, granularity is 100～300 orders;
---utilize the laser forming technology, according to the three-dimensional digital-to-analogue of parts such as undercarriage urceolus, piston rod, with 300M super-high strength steel powder melt deposition successively, until being piled into designed part blank, the main technologic parameters of wherein said laser forming technology is:
Laser beam power: 3.0～10kW
Laser beam spot diameter: 3～6mm
Sweep speed: 5～10mm/min
Powder mass flow scope: 10～30g/min
Monolayer deposition thickness: be not higher than 0.8mm.
2. according to the manufacture method of the described 300M ultrahigh strength steel aircraft landing gear of claim 1, it is characterized in that: the main technologic parameters of described laser forming technology is:
Laser beam power: 8.5～10kW
Laser beam spot diameter: 4～5mm
Sweep speed: 6～8mm/min
Powder mass flow scope: 18～22g/min
Monolayer deposition thickness range: 0.5～0.6mm.
3. according to the manufacture method of the described 300M ultrahigh strength steel aircraft landing gear of claim 1, it is characterized in that: this manufacture method also comprises other super-high strength steel that is suitable for laser fast forming except that suitable 300M super-high strength steel.
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| CNA2008100103089A CN101229586A (en) | 2008-02-01 | 2008-02-01 | Method of manufacturing 300M ultrahigh strength steel aircraft landing gear |
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| CNA2008100103089A CN101229586A (en) | 2008-02-01 | 2008-02-01 | Method of manufacturing 300M ultrahigh strength steel aircraft landing gear |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133698A (en) * | 2011-02-17 | 2011-07-27 | 中国航空工业集团公司西安飞机设计研究所 | Method for manufacturing airplane metal integrated structure |
| CN103205747A (en) * | 2013-03-19 | 2013-07-17 | 江苏仪征威龙活塞环有限公司 | Processing method of high-wear-resistance laser-reinforced material for piston rings |
| CN105618753A (en) * | 2016-03-03 | 2016-06-01 | 中研智能装备有限公司 | Roll plasma 3D printing remanufacturing device and method |
| CN112045192A (en) * | 2020-09-10 | 2020-12-08 | 中国航空工业集团公司沈阳飞机设计研究所 | Manufacturing method of outer cylinder of aircraft landing gear |
| CN112782362A (en) * | 2020-12-29 | 2021-05-11 | 中国航空工业集团公司西安飞机设计研究所 | Method for verifying seaworthiness conformance of civil aircraft structural member laser forming technology |
-
2008
- 2008-02-01 CN CNA2008100103089A patent/CN101229586A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133698A (en) * | 2011-02-17 | 2011-07-27 | 中国航空工业集团公司西安飞机设计研究所 | Method for manufacturing airplane metal integrated structure |
| CN102133698B (en) * | 2011-02-17 | 2012-12-12 | 中国航空工业集团公司西安飞机设计研究所 | Method for manufacturing airplane metal integrated structure |
| CN103205747A (en) * | 2013-03-19 | 2013-07-17 | 江苏仪征威龙活塞环有限公司 | Processing method of high-wear-resistance laser-reinforced material for piston rings |
| CN105618753A (en) * | 2016-03-03 | 2016-06-01 | 中研智能装备有限公司 | Roll plasma 3D printing remanufacturing device and method |
| CN112045192A (en) * | 2020-09-10 | 2020-12-08 | 中国航空工业集团公司沈阳飞机设计研究所 | Manufacturing method of outer cylinder of aircraft landing gear |
| CN112782362A (en) * | 2020-12-29 | 2021-05-11 | 中国航空工业集团公司西安飞机设计研究所 | Method for verifying seaworthiness conformance of civil aircraft structural member laser forming technology |
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Open date: 20080730 |