CN105624596A - Method for improving high-temperature compressive property of TC6 titanium alloy - Google Patents
Method for improving high-temperature compressive property of TC6 titanium alloy Download PDFInfo
- Publication number
- CN105624596A CN105624596A CN201610142701.8A CN201610142701A CN105624596A CN 105624596 A CN105624596 A CN 105624596A CN 201610142701 A CN201610142701 A CN 201610142701A CN 105624596 A CN105624596 A CN 105624596A
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- titanium alloy
- temperature
- compressive property
- compression strength
- temperature compressive
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
Abstract
The invention discloses a method for improving the high-temperature compressive property of TC6 titanium alloy. The method comprises the following steps: heating the TC6 titanium alloy to 980-1020 DEG C, carrying out heat preservation for 20-40min, rapidly soaking into liquid nitrogen (at the temperature of 196 DEG C below zero), and standing for 10-30min. The method is simple in technological method, convenient in operation and stable in quality. The TC6 titanium alloy after being treated by the method has higher high temperature compression strength which is improved by above 10 percent compared with that of the TC6 titanium alloy before treated at the same temperature.
Description
Technical field
The invention belongs to technical field of metal, in particular to the working method of a kind of titanium alloy.
Background technology
TC6 titanium alloy has outside the advantages such as common alloy of titanium specific tenacity height, erosion resistance be good, also has good heat resistance, is one of industrial titanium alloys being most widely used such as aerospace, can be on active service for a long time at 400��450 DEG C. Therefore, it is to increase TC6 titanium alloy mechanical property under the high temperature conditions, particularly high temperature compression strength, have very important engineering significance. At present, it is to increase the method for TC6 titanium alloy intensity mainly thermomechanical treatment and quench aging. Aforesaid method is adopted industrially to apply, but it is strict to there is complex procedures, distortion and heat treating regime control, even can not meet the performance requriements of some workpiece.
Summary of the invention
It is an object of the invention to provide that a kind of method is simple, easy to operate, the method for the raising TC6 titanium alloy high-temperature compressive property of steady quality. The present invention mainly makes high temperature TC6 titanium alloy cool in liquid nitrogen.
The step of the present invention is as follows:
(1) work material: TC6 titanium alloy, its chemical composition massfraction wt% is: Al5.5%��7.0%, Mo2.0%��3.0%, Cr0.8%��2.3%, Fe0.2%��0.7%, Si0.15%��0.4%, impurity��0.40, all the other are Ti;
(2) Heating temperature: 980 DEG C��1020 DEG C;
(3) soaking time: 20��40min;
(4) type of cooling: immerse after (-196 DEG C) in liquid nitrogen stop 10��30min and take out.
The present invention is owing to adopting cooled with liquid nitrogen treatment process, can make TC6 titanium alloy tissue occurs fine acicular martensite (�� '), crystal boundary density in alloy structure is increased, add dislocation motion obstacle number, play grain-boundary strengthening effect, moreover, the shrinkage effect that cooled with liquid nitrogen process produces can make the defects such as the room of material internal and micropore improve, it is to increase the density of material; In addition, after sub-zero treatment, the metastable phase martensite in TC6 titanium alloy tissue will decompose when high temperature (more than 300 DEG C), form the alpha+beta tissue of disperse, serve dispersion-strengthened action, thus improve TC6 titanium alloy ultimate compression strength under the high temperature conditions.
The present invention compared with prior art tool have the following advantages: processing method of the present invention is simple, easy to operate, steady quality, effectively improve TC6 titanium alloy high-temperature compressive property, ultimate compression strength can improve more than 10%, is suitable for suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the compression fracture apperance Electronic Speculum figure of embodiment of the present invention 1TC6 titanium alloy, and (a) is for before sub-zero treatment; B () is for after sub-zero treatment.
Embodiment
Embodiment 1
Material therefor is TC6 titanium alloy, and its chemical composition (massfraction wt%) is: Ti88.57%, Al6.21%, Mo2.58%, Cr1.87, Fe0.43, Si0.34; After the annealed state titanium alloy bar of mentioned component is heated in KLX-13A type high temperature resistance furnace 980 DEG C of insulation 40min, immerses (-196 DEG C) in liquid nitrogen fast and stop 30min. Its ultimate compression strength when 500 DEG C is tested with Gleeble-3500 type hot modeling test machine. The test result of its ultimate compression strength is in table 1.
Embodiment 2
Material therefor is TC6 titanium alloy, and its chemical composition (massfraction wt%) is: Ti89.83%, Al5.5%, Mo3.0%, Cr0.8, Fe0.69, Si0.15, impurity 0.3.; After the annealed state titanium alloy bar of mentioned component is heated in KLX-13A type high temperature resistance furnace 1020 DEG C of insulation 20min, immerses (-196 DEG C) in liquid nitrogen fast and stop 10min. Its ultimate compression strength when 500 DEG C is tested with Gleeble-3500 type hot modeling test machine. The test result of its ultimate compression strength is in table 1.
Embodiment 3
Material therefor is TC6 titanium alloy, and its chemical composition (massfraction wt%) is: Ti88.36%, Al7.0%, Mo2.0%, Cr2.3, Fe0.2, Si0.04, impurity 0.10; After the annealed state titanium alloy bar of mentioned component is heated in KLX-13A type high temperature resistance furnace 1000 DEG C of insulation 30min, immerses (-196 DEG C) in liquid nitrogen fast and stop 20min. Its ultimate compression strength when 500 DEG C is tested with Gleeble-3500 type hot modeling test machine. The test result of its ultimate compression strength is in table 1.
The intensity test result of TC6 titanium alloy when 500 DEG C under table 1 different states
Above-mentioned experimental result shows: adopts the inventive method can effectively improve the high temperature compression strength of TC6 titanium alloy, relatively improves more than 10% with the ultimate compression strength of TC6 titanium alloy before temperature Example.
Claims (1)
1. one kind is improved the method for TC6 titanium alloy high-temperature compressive property, it is characterised in that:
(1) starting material are TC6 titanium alloy, and its chemical composition massfraction wt% is: Al5.5%��7.0%, Mo2.0%��3.0%, Cr0.8%��2.3%, Fe0.2%��0.7%, Si0.15%��0.4%, impurity��0.40, and all the other are Ti;
(2) above-mentioned TC6 titanium alloy being heated to 980 DEG C��1020 DEG C, after insulation 20��40min, in quick immersion liquid nitrogen ,-196 DEG C stop 10��30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142701.8A CN105624596A (en) | 2016-03-14 | 2016-03-14 | Method for improving high-temperature compressive property of TC6 titanium alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610142701.8A CN105624596A (en) | 2016-03-14 | 2016-03-14 | Method for improving high-temperature compressive property of TC6 titanium alloy |
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| CN105624596A true CN105624596A (en) | 2016-06-01 |
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| CN201610142701.8A Pending CN105624596A (en) | 2016-03-14 | 2016-03-14 | Method for improving high-temperature compressive property of TC6 titanium alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220849A (en) * | 2018-01-08 | 2018-06-29 | 东莞市润钛五金科技有限公司 | A kind of surface treatment method for the fission of titanium article titanium molecule |
| CN108374135A (en) * | 2018-03-30 | 2018-08-07 | 江苏大学 | A kind of processing technology improving TC6 titanium alloys intensity and high-temperature stability |
| CN108559934A (en) * | 2018-03-30 | 2018-09-21 | 江苏大学 | A kind of cryogenic treatment process of TC6 titanium alloy forgings |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103525995A (en) * | 2013-10-30 | 2014-01-22 | 常州市润源经编运用工程技术研究中心有限公司 | Treatment method for improving alloy material strength, toughness, and anti-fatigue life |
| CN104419884A (en) * | 2013-09-04 | 2015-03-18 | 天津大学 | Application of cryogenic treatment in eliminating residual stress of titanium alloy electron beam welding |
| CN105088013A (en) * | 2015-09-14 | 2015-11-25 | 沈阳泰恒通用技术有限公司 | Titanium alloy material for manufacturing locomotive brake disc bolts and machining process of titanium alloy material |
-
2016
- 2016-03-14 CN CN201610142701.8A patent/CN105624596A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104419884A (en) * | 2013-09-04 | 2015-03-18 | 天津大学 | Application of cryogenic treatment in eliminating residual stress of titanium alloy electron beam welding |
| CN103525995A (en) * | 2013-10-30 | 2014-01-22 | 常州市润源经编运用工程技术研究中心有限公司 | Treatment method for improving alloy material strength, toughness, and anti-fatigue life |
| CN105088013A (en) * | 2015-09-14 | 2015-11-25 | 沈阳泰恒通用技术有限公司 | Titanium alloy material for manufacturing locomotive brake disc bolts and machining process of titanium alloy material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220849A (en) * | 2018-01-08 | 2018-06-29 | 东莞市润钛五金科技有限公司 | A kind of surface treatment method for the fission of titanium article titanium molecule |
| CN108220849B (en) * | 2018-01-08 | 2021-12-03 | 东莞市润钛五金科技有限公司 | Surface treatment method for titanium product titanium molecule fission |
| CN108374135A (en) * | 2018-03-30 | 2018-08-07 | 江苏大学 | A kind of processing technology improving TC6 titanium alloys intensity and high-temperature stability |
| CN108559934A (en) * | 2018-03-30 | 2018-09-21 | 江苏大学 | A kind of cryogenic treatment process of TC6 titanium alloy forgings |
| CN108559934B (en) * | 2018-03-30 | 2020-02-21 | 江苏大学 | Cryogenic treatment process for TC6 titanium alloy forging |
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