CN1363713A - Process for osmosizing oxygen to Ti alloy - Google Patents
Process for osmosizing oxygen to Ti alloy Download PDFInfo
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- CN1363713A CN1363713A CN 01138775 CN01138775A CN1363713A CN 1363713 A CN1363713 A CN 1363713A CN 01138775 CN01138775 CN 01138775 CN 01138775 A CN01138775 A CN 01138775A CN 1363713 A CN1363713 A CN 1363713A
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- oxygen
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- titanium alloy
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- osmosizing
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- Other Surface Treatments For Metallic Materials (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A process for osmosizing oxygen to Ti alloy in order for alpha-hardening includes burying the Ti-alloy workpiece in the treated medium, heating to 700-850 deg.C, holding the temp for 2-14 hr, and removing the oxidized film from its surface. Its microscopic surface hardness is higher than 500 Kg/sq.mm and the depth of hardened layer is 0.035-0.1 mm. Its relative antiwear performance is increased by 100 times.
Description
Affiliated technical field
The invention belongs to a kind of treatment process of titanium alloy.
Background technology
Titanium alloy is widely used in fields such as aircraft industry because it has corrosion-resistant, high temperature resistant, advantages such as specific tenacity is high, good toughness, but because titanium alloy surface hardness is not high, not wear-resisting, causes it to use and also be subjected to certain influence.
Summary of the invention:
Low at the titanium alloy surface microhardness, use affected problem, the invention provides a kind of osmosizing oxygen to Ti alloy method that can improve titanium alloy surface hardness, the material that the present invention is suitable for is TCII and two kinds of titanium alloys of BT20, in the normal air process furnace, oozing oxygen in medium handles, select sand for use, the subsidiary material that graphite etc. are handled through acid-scrubbing cleaning are medium, with the medium of certain particle size with certain density nitric acid dousing 20～40 hours, close cleaning in the warp again, be placed on after the taking-up in the stoving oven 900～1000 ℃ roasting temperature 24 hours, then pending titanium alloy spare is embedded in the medium, be placed on and ooze the oxygen processing in the air-heating furnace, treatment temp is 700～850 ℃, and the treatment time is 2～14 hours.Can select for use methods such as grinding, polishing, pickling, mechanical workout to remove the oxide film of titanium alloy surface after the taking-up.Measure microhardness with microhardness tester, titanium alloy spare its surface hardness before not oozing the oxygen processing only is HV=300kg/mm
2After the processing, record its surface microhardness HV 〉=500kg/mm
2, α case depth d=0.035～0.100mm, wear resistance has improved 100 times.
With this kind method titanium alloy is carried out the α hardening treatment, improved the surface hardness of titanium alloy spare effectively, strengthen wear resistance, thus the work-ing life of having improved titanium alloy spare.But this kind treatment process has also been brought certain negative effect, promptly reduced titanium alloy spare stretching plastic, reduced fatigue, therefore method of the present invention can not be used for handling the titanium alloy spare of rotation, and will be used in static element or do on certain reciprocating titanium alloy spare, all can use method of the present invention to handle as parts such as the lining of engine, piston, pin, sleeve, housing, liner plate, little axles.In oozing the oxygen treating processes, the volume of titanium alloy spare swells to some extent, therefore will note the amount of swelling, thereby make the process redundancy of workpiece.
Use surface hardness that why method of the present invention can improve titanium alloy spare and be because titanium alloy spare through after oozing oxygen handle in medium, has formed oversaturated solid solution layer in the α Xiangli.
Embodiment
Handle the TCII lining with method of the present invention.
Select for use and contain Al
2O
3Corundum sand be medium, the medium granularity is 30～40 orders, treatment media is 5～20%HNO with concentration
3The aqueous solution soaks medium 20-40 hour, will be placed in the stoving oven roasting then through the medium that the overpickling post neutralization cleans 24 hours, and maturing temperature is 900～1000 ℃.
Pending TCII lining is placed in the container, and with through the medium of handling well pending being buried, the thickness that buries is 30mm, is placed on then and oozes the oxygen processing in the normal air process furnace, and Heating temperature is 800 ℃, soaking time 6 hours.
Handle the back and take out the TCII lining, remove surface film oxide, expose α phase hardened layer, measure its surface microhardness HV 〉=500kg/mm with microhardness tester with working method
2, its wear resistance improves 100 times.
Claims (4)
1. osmosizing oxygen to Ti alloy method, it is characterized in that titanium alloy spare is embedded in the treated medium, be placed in the normal air process furnace, under 700～850 ℃ of temperature, be incubated 2～14 hours, remove the oxide film on titanium alloy spare surface then by working method, expose α phase hardened layer.
2. osmosizing oxygen to Ti alloy method according to claim 1 is characterized in that said medium is sand or graphite.
3. osmosizing oxygen to Ti alloy method according to claim 1 and 2, the processing that it is characterized in that said medium are that the dielectric material of the certain particle size that will choose soaked in acid 20～40 hours, then roasting kiln roasting 24 hours.
4. osmosizing oxygen to Ti alloy method according to claim 1 is characterized in that saidly removing the working method that titanium alloy spare oozes oxygen rear surface oxide film and comprising: grinding, polishing, grinding, pickling, machining process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011387750A CN1146673C (en) | 2001-12-06 | 2001-12-06 | Process for osmosizing oxygen to Ti alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011387750A CN1146673C (en) | 2001-12-06 | 2001-12-06 | Process for osmosizing oxygen to Ti alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363713A true CN1363713A (en) | 2002-08-14 |
| CN1146673C CN1146673C (en) | 2004-04-21 |
Family
ID=4674739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011387750A Expired - Fee Related CN1146673C (en) | 2001-12-06 | 2001-12-06 | Process for osmosizing oxygen to Ti alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1146673C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314827C (en) * | 2004-12-08 | 2007-05-09 | 中国科学院金属研究所 | Method for composite surface strengthening treatment of titanium alloy by oxygen infiltration-solid solution diffusion |
| CN102400086A (en) * | 2011-11-24 | 2012-04-04 | 苏州大学 | Titanium alloy oxygen permeation surface strengthening treatment method |
| CN109536876A (en) * | 2018-11-30 | 2019-03-29 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preprocess method for improving TC11 titanium alloy surface and seeping oxygen ability |
-
2001
- 2001-12-06 CN CNB011387750A patent/CN1146673C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314827C (en) * | 2004-12-08 | 2007-05-09 | 中国科学院金属研究所 | Method for composite surface strengthening treatment of titanium alloy by oxygen infiltration-solid solution diffusion |
| CN102400086A (en) * | 2011-11-24 | 2012-04-04 | 苏州大学 | Titanium alloy oxygen permeation surface strengthening treatment method |
| CN109536876A (en) * | 2018-11-30 | 2019-03-29 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preprocess method for improving TC11 titanium alloy surface and seeping oxygen ability |
| CN109536876B (en) * | 2018-11-30 | 2021-01-22 | 中国航发沈阳黎明航空发动机有限责任公司 | Pretreatment method for improving oxygen permeability of TC11 titanium alloy surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1146673C (en) | 2004-04-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040421 Termination date: 20131206 |