CN105154872A - Laser manufacturing method for preparing Ni base alloy gradient materials on titanium alloy - Google Patents
Laser manufacturing method for preparing Ni base alloy gradient materials on titanium alloy Download PDFInfo
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Abstract
The invention belongs to the technical field of laser processing, and relates to a laser manufacturing method for preparing Ni base alloy high-temperature-resistant gradient materials on titanium alloy. The laser manufacturing method is mainly applied to preparation of a titanium alloy high-temperature-resistant layer so as to improve the high temperature resistance property of the titanium alloy. The Ni base with the high temperature resistance property superior to that of the titanium alloy is selected as the high-temperature-resistant layer, and the laser cladding process is used for adding two middle layers namely V-Cr and stainless, so that the Ni base alloy high-temperature-resistant gradient materials are prepared on the titanium alloy. The prepared Ni base alloy high-temperature-resistant layer is good in combination with the titanium alloy base body, and the crack defect on the surface is avoided.
Description
Technical field
The invention belongs to technical field of laser processing, relate to a kind of laser manufacture technique preparing Ni base alloy gradient material on titanium alloy, be mainly used in the preparation of titanium alloy surface high-temperature-resistant layer, improve the hot properties of titanium alloy.
Background technology
The development of hypersonic aircraft and high-performance fighter aircraft of new generation, airframe high-temperature component is as the leading edge of a wing, vertical fin leading edge, engine hot parts such as outer combustion case is had higher requirement to high thermal resistance, but consider the problem of aircraft loss of weight, therefore just can meet design requirement in the urgent need to development lightweight, high-performance, resistant to elevated temperatures novel texture functional materials.Current aircraft and the more use Ni based high-temperature alloy of engine hot parts, casing as outdoor in engine combustion uses GH4169, and the more use titanium alloy material of light-weight high-strength material, consider the characteristic of bi-material, bi-material is combined, namely on titanium alloy substrate, Ni based high-temperature alloy is prepared, form a kind of novel texture functional materials, meet lightening fire resistant two kinds of performances, so the Project R&D requirement background that the development of titanium alloy/Ni based high-temperature alloy temperature function gradient material just has it clear and definite.
Greatly, bi-material reaction can produce compound between various metals, causes bi-material consistency extreme difference for titanium alloy and Ni based high-temperature alloy bi-material thermal expansion coefficient difference, directly combines and cannot realize.Need analysis and the development of carrying out middle layer transition composition.
Summary of the invention
The object of the invention is to propose a kind of laser manufacture method preparing the high temperature resistant gradient material of Ni base alloy on titanium alloy material, be mainly used in the preparation of titanium alloy surface high-temperature-resistant layer, improve the hot properties of titanium alloy.
The particular content of technical solution of the present invention is:
(1) argon gas powder by atomization mode is adopted to prepare Ni base alloy and intermediate layer powdered material, middle transition layer material is two kinds, be respectively V-Cr alloy and Stainless Steel Alloy, the Cr content volume fraction range 5.0% ~ 12.0% of V-Cr alloy, stainless C content controls below 0.05%, Cr content 8% ~ 20%, Ni content controls below 10%, and powder size is 150 order ~ 325 orders;
(2) first adopt the method for laser melting coating on titanium alloy base material, prepare the thick V-Cr alloy layer of 0.3 ~ 0.5mm, then the Stainless Steel Alloy that laser melting coating 0.2 ~ 0.5mm is thick on V-Cr layer, the last Ni based high-temperature alloy that laser melting coating 0.2 ~ 0.5mm is thick on stainless steel layer, realizes the gradient transition of titanium alloy to Ni base alloy;
(3) under Ar gas shielded or vacuum environment, the process of whole removing stress annealing is carried out, annealing region: 650 DEG C ~ 750 DEG C.
The advantage that the present invention has and beneficial effect
The present invention adopts laser melting and coating technique at the high temperature resistant gradient material of titanium alloy material surface preparation Ni base alloy, laser melting coating has following advantage when preparing gradient material: the energy density of laser beam is high, rate of heating is fast, less to the heat affecting of titanium alloy base material, the degree of depth of fusing into titanium alloy base material can be controlled in below 0.1mm, the unrelieved stress that postwelding produces is little, causes the distortion of base material little, the generation of control surface crackle; The thickness range of cladding layer is comparatively large, individual layer cladding thickness 0.1 ~ 2.0mm; Accurately can control the forming thickness of gradient material.
The present invention prepares that titanium alloy/Ni base alloy is high temperature resistant gradient material, most critical be exactly design and the optimization of intermediate layer, bi-material is selected to realize the gradient transition of titanium alloy to nickel base superalloy, first be prepare V-Cr alloy on titanium alloy, because Ti and V and Cr is uniform grain phasor, can dissolve each other completely, Stainless Steel Alloy is prepared subsequently on V-Cr layer, Fe and V and Cr is uniform grain phasor, also can dissolve each other completely, C content simultaneously in control stainless material is below 0.05%, stainless steel middle layer is made to have good ductility to alleviate the unrelieved stress in gradient material preparation process, Ni content in control stainless steel is below 5%, Ti-Ni brittle intermetallic thing is generated after preventing the Ti phase mutual diffusion in Ni and titanium alloy, cause cracking, Fe and Ni also can dissolve each other completely in addition, by design and the optimization of above intermediate layer material, the intact preparation of the gradient material that achieves that titanium alloy/Ni base alloy is high temperature resistant, surface flawless defect, between each layer of gradient material, fusion rate can reach 100%, in conjunction with fine.This gradient material has lightweight, high-strength, the one-sided good characteristic such as high temperature resistant, may extend to the material development of high-speed aircraft and high thrust-weight ratio engine hot-end component.Embodiment:
Below with reference to example, technical solution of the present invention is described in further detail:
The step of the method is:
(1) argon gas powder by atomization mode is adopted to prepare Ni base alloy and intermediate layer powdered material, intermediate layer material is two kinds and is respectively V-Cr alloy and Stainless Steel Alloy, the Cr content volume fraction range 8.0% ~ 10.0% of V-Cr alloy, stainless C content controls below 0.03%, Cr content 10% ~ 15%, Ni content controls below 5%.Powder size is 150 order ~ 325 orders;
(2) prepare front surface cleaning, use wire wheel polishing to remove oxidation film on titanium alloy surface, metal background color is exposed in visual inspection, then uses acetone scrub;
(3) first adopt the method for laser melting coating on titanium alloy base material, prepare the thick V-Cr alloy layer of 0.3 ~ 0.5mm, then the Stainless Steel Alloy that laser melting coating 0.3 ~ 0.5mm is thick on V-Cr layer, finally Laser Cladding Ni-base superalloy on stainless steel layer, realizes the gradient transition of titanium alloy to Ni base alloy;
(4) after prepared by high temperature resistant gradient material, under Ar gas shielded or vacuum environment, the process of whole removing stress annealing is carried out, annealing region: 650 DEG C ~ 750 DEG C, furnace cooling.
Example one
TC4 titanium alloy sheet is prepared the high temperature resistant gradient material of GH4169
1.TC4 titanium alloy quasi is standby
Processing TC4 titanium alloy sheet, is of a size of 50mm × 50mm × 10mm.
2. implementation process
(1) argon gas powder by atomization mode is adopted to prepare GH4169 powder and V-Cr and stainless steel middle layer powdered alloy, the percent by volume of V-Cr alloy is respectively 91.3% and 8.7%, stainless C content 0.03%, Cr content 13%, Ni content 5%, powder size is 150 order ~ 325 orders;
(2) prepare front surface cleaning, use wire wheel polishing to remove TC4 titanium alloy plate surface film oxide, metal background color is exposed in visual inspection, then uses acetone scrub;
(3) first adopt the method for laser melting coating on titanium alloy base material, prepare the V-Cr alloy layer of 50mm × 50mm × 0.5mm, then the Stainless Steel Alloy of laser melting coating 50mm × 50mm × 0.5mm on V-Cr layer, finally on stainless steel layer, the GH4169 of laser melting coating 50mm × 50mm × 0.5mm is once high temperature resistant, realizes the gradient transition of TC4 titanium alloy to GH4169 superalloy;
(4) after prepared by high temperature resistant gradient material, under Ar gas shielded or vacuum environment, the process of whole removing stress annealing is carried out, annealing schedule: 650 DEG C × 2h, furnace cooling.
Compared with prior art, adopt the high temperature resistant gradient material of GH4169 that technical solution of the present invention is prepared on TC4 titanium alloy, through fluoroscopic examination flawless defect, while guarantee TC4 titanium alloy lightweight nature, significantly improve the high-temperature stability of TC4 material surface.
Claims (2)
1. on titanium alloy, prepare a laser manufacture technique for Ni base alloy gradient material, it is characterized in that: the step of the method is:
(1) argon gas powder by atomization mode is adopted to prepare Ni base alloy and intermediate layer powdered material, middle transition layer material is two kinds, be respectively V-Cr alloy and Stainless Steel Alloy, the Cr content volume fraction range 5.0% ~ 12.0% of V-Cr alloy, stainless C content controls below 0.05%, Cr content 8% ~ 20%, Ni content controls below 10%, and powder size is 150 order ~ 325 orders;
(2) first adopt the method for laser melting coating on titanium alloy base material, prepare the thick V-Cr alloy layer of 0.3 ~ 0.5mm, then the Stainless Steel Alloy that laser melting coating 0.2 ~ 0.5mm is thick on V-Cr layer, the last Ni based high-temperature alloy that laser melting coating 0.2 ~ 0.5mm is thick on stainless steel layer, realizes the gradient transition of titanium alloy to Ni base alloy;
(3) under Ar gas shielded or vacuum environment, the process of whole removing stress annealing is carried out, annealing region: 650 DEG C ~ 750 DEG C.
2. a kind of laser manufacture technique preparing Ni base alloy gradient material on titanium alloy according to claim 1, the Cr content volume mark of V-Cr alloy is 8.0% ~ 10.0%, stainless C content controls below 0.03%, and Cr content 10% ~ 15%, Ni content controls below 5%.
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Cited By (9)
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| CN108216650A (en) * | 2017-12-19 | 2018-06-29 | 北京有色金属研究总院 | A kind of gradient-structure air intake duct |
| CN108216574A (en) * | 2017-12-21 | 2018-06-29 | 北京有色金属研究总院 | A kind of gradient-structure lattice fin |
| CN109513925A (en) * | 2018-12-03 | 2019-03-26 | 航天特种材料及工艺技术研究所 | The big temperature gradient structural member of thin-walled and its laser direct deposition preparation method |
| CN109570765A (en) * | 2019-01-04 | 2019-04-05 | 沈阳工业大学 | A kind of manufacturing method that titanium alloy is connect with nickel base superalloy laser gain material |
| CN111074269A (en) * | 2020-01-02 | 2020-04-28 | 沈阳中钛装备制造有限公司 | Titanium alloy wear-resistant coating and preparation method thereof |
| CN111230114A (en) * | 2020-02-28 | 2020-06-05 | 沈阳工业大学 | Laser additive manufacturing method of TC4/IN625 functional gradient composite material |
| CN111560611A (en) * | 2020-05-07 | 2020-08-21 | 上海交通大学 | Method for preparing transition layer of nickel-based coating on titanium alloy surface by laser cladding |
| CN112497864A (en) * | 2020-11-05 | 2021-03-16 | 中国航发北京航空材料研究院 | High-temperature-resistant light metal cladding material and preparation method thereof |
| US11618085B2 (en) | 2018-03-30 | 2023-04-04 | University Of Science And Technology Beijing | Apparatus and method based on selective laser melting technique for preparing functionally gradient material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216650A (en) * | 2017-12-19 | 2018-06-29 | 北京有色金属研究总院 | A kind of gradient-structure air intake duct |
| CN108216574A (en) * | 2017-12-21 | 2018-06-29 | 北京有色金属研究总院 | A kind of gradient-structure lattice fin |
| US11618085B2 (en) | 2018-03-30 | 2023-04-04 | University Of Science And Technology Beijing | Apparatus and method based on selective laser melting technique for preparing functionally gradient material |
| CN109513925A (en) * | 2018-12-03 | 2019-03-26 | 航天特种材料及工艺技术研究所 | The big temperature gradient structural member of thin-walled and its laser direct deposition preparation method |
| CN109513925B (en) * | 2018-12-03 | 2021-05-25 | 航天特种材料及工艺技术研究所 | Thin-wall large-temperature-gradient structural component and laser direct deposition preparation method thereof |
| CN109570765A (en) * | 2019-01-04 | 2019-04-05 | 沈阳工业大学 | A kind of manufacturing method that titanium alloy is connect with nickel base superalloy laser gain material |
| CN109570765B (en) * | 2019-01-04 | 2020-12-18 | 沈阳工业大学 | Manufacturing method for laser material increase connection of titanium alloy and nickel-based superalloy |
| CN111074269A (en) * | 2020-01-02 | 2020-04-28 | 沈阳中钛装备制造有限公司 | Titanium alloy wear-resistant coating and preparation method thereof |
| CN111230114A (en) * | 2020-02-28 | 2020-06-05 | 沈阳工业大学 | Laser additive manufacturing method of TC4/IN625 functional gradient composite material |
| CN111560611A (en) * | 2020-05-07 | 2020-08-21 | 上海交通大学 | Method for preparing transition layer of nickel-based coating on titanium alloy surface by laser cladding |
| CN112497864A (en) * | 2020-11-05 | 2021-03-16 | 中国航发北京航空材料研究院 | High-temperature-resistant light metal cladding material and preparation method thereof |
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