CN101333647A - Age hardening processing method of Ti-Al-N coatings - Google Patents
Age hardening processing method of Ti-Al-N coatings Download PDFInfo
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- CN101333647A CN101333647A CNA2008100318201A CN200810031820A CN101333647A CN 101333647 A CN101333647 A CN 101333647A CN A2008100318201 A CNA2008100318201 A CN A2008100318201A CN 200810031820 A CN200810031820 A CN 200810031820A CN 101333647 A CN101333647 A CN 101333647A
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Abstract
Disclosed is a Ti-Al-N coating age hardening treatment method, comprising: positioning a TixAl(1-x)N(0.3<x<0.7) coating in the protective atmosphere to be heated to the temperature between 650 and 1000DEG C and insulated for 20 to 180min. The process method is simple and obvious in hardening effects, and introduces a heat treatment method into the Ti-Al-N coating field, and only separates out nano-sized c-TiN and c-AlN accompanied by spinodal decomposition when in age hardening of the c-Ti-Al-N coating through strictly controlling the age hardening temperature and time, a strain field is produced between the separated phase and parent phase due to the difference of lattice constants, and the dislocation movement is stopped, thereby improving the hardness of the coating and achieving the purpose of age hardening. The method can be widely applied to the fields of cutters, molds and wear-resistant parts, and can effectively improve the anti-wear performance of products and extend the service life of products; and the technical process and technical parameters can all realize the industrialized applications, and open a new direction for improving the performance of cutters.
Description
Technical field
The present invention relates to a kind of age hardening heat treating method, be meant a kind of age hardening treatment process of Ti-Al-N coating especially physical gaseous phase deposition coating.
Background technology
Age hardening claims precipitation-hardening again, and this heat treating method is widely used in bulk alloy fields such as Al alloy, steel, but uses few in coatings art.Adopt the Ti-Al-N coating of physical vapor deposition (PVD) method preparation because its high rigidity and high-temperature oxidation resistance become the most widely used coated material in current cutting tool field.The structure of this coating is solidly soluted into substitutional solid solution among face-centered cubic (c) TiN for the Al atom, and its performance is decided by Al content to a great extent; High Al content can improve the hardness and the antioxidant property of coating, but too high Al content can cause the crystalline structure of coating to be changed to close-packed hexagonal structure (h) by face-centred cubic structure, thereby the mechanical property of coating is sharply descended, and loses using value.Under the normal temperature, the solid solubility of Al in TiN is very low, and in general, the Ti-Al-N coating in the practical application is the supersaturated solid solution with TiN cubic structure, is in metastable state.Near when high speed cutting and DRY CUTTING the cutting edge roundness temperature can reach more than 1000 ℃, under this temperature, the Ti-Al-N coating of metastable phase can to its stable phase (c) TiN and (h) AlN transform and cause its mechanical property sharply to reduce, lose the effect of original coating.Find that through test (650-1000 ℃) anneal Ti-Al-N coating can produce aging hardening effect at a certain temperature, coating generation spinodal decomposition is separated out the c-TiN and the c-AlN of nano-scale, thereby has improved the hardness of coating.Though the temperature of coated cutting tool is reached or the required temperature of process age hardening, but do not reach the required forming core time of spinodal decomposition because the time is extremely of short duration, therefore, " self-hardening " effect in the working angles of Ti-Al-N coated cutting tool is difficult to realize.Up to the present, also find no the method that bibliographical information is handled the Ti-Al-N coating subsequent reinforced of physical vapor deposition (PVD) method preparation.
Goal of the invention
The object of the present invention is to provide that a kind of processing method is simple, the tangible TiAlN coating of hardening effect age hardening treatment process, by control age hardening temperature and time, reach c-TiN and the c-AlN that spinodal decomposition is only separated out nano-scale takes place when making the age hardening of c-TiAlN coating, thereby improve the hardness of coating, reach the purpose of age hardening.
The present invention---TiAlN coating age hardening treatment process is to adopt following proposal to realize: with Ti
xAl
1-xN (0.3＜x＜0.7) is coated with to be placed on and is heated to 650-1000 ℃ in the protective atmosphere, insulation 20-180min.
Among the present invention, described protective atmosphere is vacuum atmosphere or inert atmosphere.
Among the present invention, described Heating temperature is 750-900 ℃, and described soaking time is 60-140min.
Among the present invention, described Heating temperature is 800-850 ℃, and described soaking time is 90-110min.
Principle of work of the present invention is sketched in following:
The present invention handles carried out high-temperature aging by the metastable c-TiAlN coating with TiN cubic structure supersaturated solid solution owing to adopt above-mentioned processing method, makes to be coated with stable c-TiN of course and h-AlN transformation.But because big lattice misfit between different crystal structure h-AlN and c-TiAlN causes the big forming core merit of these transformations generation needs, therefore, this transformation needs the c-AlN of metastable phase to be used as the intermediate phase transition to finish.That is to say, the c-TiAlN coating is carried out The high temperature anneal, coating is at first separated out the c-TiN and the c-AlN of nano-scale through spinodal decomposition, and by the spontaneous growth of diffusion.Ti-Al-N coating after the spinodal decomposition is made up of precipitated phase c-TiN, the c-AlN of parent phase TiAlN and nano-scale, difference owing to lattice constant between precipitated phase and the parent phase produces strain field, serve as the obstacle source of dislocation motion, stop the motion of dislocation, thereby improve the hardness of coating.In addition, by the time and the temperature of control ageing treatment, can guarantee effectively that precipitated phase is made up of precipitated phase c-TiN, the c-AlN of parent phase TiAlN and nano-scale and the amount of precipitated phase; Because, too high aging temperature, the c-AlN that separates out changes h-AlN mutually into, reduces the hardness of coating; The c-TiN that crosses low treatment temp and then do not have nano-scale separates out mutually with c-AlN.Simultaneously, by the time of control ageing treatment, can effectively guarantee the amount of precipitated phase c-TiN, c-AlN; Because the growth of precipitated phase c-TiN and c-AlN is by spreading spontaneous carrying out, therefore, the too short ageing treatment time causes too small precipitated phase and can not effectively stop dislocation motion, does not reach the purpose of age hardening; The long ageing treatment time, the precipitated phase grain growth causes hardness to reduce.Therefore, be coated with cutter through the Ti-Al-N of ageing treatment coating coating, even the temperature of coating is reached or the required temperature of process age hardening, but do not reach the required forming core time of spinodal decomposition owing to the time is extremely of short duration, therefore, in use big change can not take place in its hardness and comprehensive mechanical performance as cutter coat through the Ti-Al-N of ageing treatment coating.In sum, processing method of the present invention is simple, hardening effect is obvious, heat treating method is incorporated into the Ti-Al-N coatings art, by strictness control age hardening temperature and time, reach c-TiN and the c-AlN that spinodal decomposition is only separated out nano-scale takes place when making the age hardening of c-TiAlN coating, because the difference of lattice constant produces strain field, stop the motion of dislocation between precipitated phase and the parent phase, thereby improve the hardness of coating, reach the purpose of age hardening.Can be widely used in cutter, mould and wearing piece field, effectively improve the wear resistance of product, improve product life; Its technological process and processing parameter all can be realized industrial applications, have opened up a new direction for improving cutting performance.
Embodiment
Embodiment 1
Ageing treatment adopts cathodic arc evaporation technology sedimentary Ti on the Si matrix in vacuum
0.34Al
0.66N coating, aging temp are 650 ℃, and aging time is 30min.The coating hardness of deposition attitude is 34.5GPa, and hardness is increased to 35.6GPa after the ageing treatment.
Embodiment 2
Ageing treatment adopts cathodic arc evaporation technology sedimentary Ti on the Si matrix in argon atmospher
0.34Al
0.66N coating, aging temp are 650 ℃, and aging time is 180min.The coating hardness of deposition attitude is 34.5GPa, and hardness is increased to 36.2GPa after the ageing treatment.
Embodiment 3
Ageing treatment adopts cathodic arc evaporation technology sedimentary Ti on hard alloy substrate in vacuum
0.34Al
0.66Coating, aging temp are 900 ℃, and aging time is 120min.The coating hardness of deposition attitude is 34.5GPa, and hardness is increased to 38.7GPa after the ageing treatment.
Embodiment 4
Ageing treatment adopts cathodic arc evaporation technology sedimentary Ti on hard alloy substrate in vacuum
0.34Al
0.66Coating, aging temp are 900 ℃, and aging time is 180min.The coating hardness of deposition attitude is 34.5GPa, and hardness is increased to 35.6GPa after the ageing treatment.
Embodiment 5
Ageing treatment adopts magnetron sputtering technique sedimentary Ti on the Si matrix in vacuum
0.56Al
0.44The N coating, 850 ℃ of aging temps, aging time are 100min.The coating hardness of deposition attitude is 30.4GPa, and hardness is increased to 32.8GPa after the ageing treatment.
Embodiment 6
Ageing treatment adopts magnetron sputtering technique sedimentary Ti on the Si matrix in argon atmospher
0.56Al
0.44N coating, aging temp are 1000 ℃, and aging time is 100min.The coating hardness of deposition attitude is 30.4GPa, and hardness is increased to 32.2GPa after the ageing treatment.
Embodiment 7
Ageing treatment adopts magnetron sputtering technique sedimentary Ti on the Si matrix in vacuum
0.60Al
0.40N coating, aging temp are 850 ℃, and aging time is 120min.The coating hardness of deposition attitude is 28.8GPa, and hardness is increased to 30.5GPa after the ageing treatment.
Embodiment 8
Ageing treatment adopts magnetron sputtering technique sedimentary Ti on the Si matrix in vacuum
0.60Al
0.40N coating, aging temp are 1000 ℃, and aging time is 120min.The coating hardness of deposition attitude is 28.8GPa, and hardness is increased to 31.8GPa after the ageing treatment.
Claims (4)
1, TiAlN coating age hardening treatment process is characterized in that: with Ti
xAl
1-xN (0.3＜x＜0.7) is coated with to be placed on and is heated to 650-1000 ℃ in the protective atmosphere, insulation 20-180min.
2, TiAlN coating age hardening treatment process according to claim 1, it is characterized in that: described protective atmosphere is vacuum atmosphere or inert atmosphere.
3, TiAlN coating age hardening treatment process according to claim 1, it is characterized in that: described Heating temperature is 750-900 ℃, described soaking time is 60-140min.
4, TiAlN coating age hardening treatment process according to claim 1, it is characterized in that: described Heating temperature is 800-850 ℃, described soaking time is 90-110min.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100318201A CN101333647A (en) | 2008-07-18 | 2008-07-18 | Age hardening processing method of Ti-Al-N coatings |
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| CNA2008100318201A CN101333647A (en) | 2008-07-18 | 2008-07-18 | Age hardening processing method of Ti-Al-N coatings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671812B (en) * | 2009-09-30 | 2011-05-18 | 株洲钻石切削刀具股份有限公司 | Heat treatment method of Ti-Al-N coating on hard alloy substrate |
| CN102517560A (en) * | 2011-12-22 | 2012-06-27 | 长沙伟徽高科技新材料股份有限公司 | Heat treatment method of TiAlN coating |
| CN103068751A (en) * | 2010-08-24 | 2013-04-24 | 康宁股份有限公司 | Glass-forming tools and methods |
-
2008
- 2008-07-18 CN CNA2008100318201A patent/CN101333647A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671812B (en) * | 2009-09-30 | 2011-05-18 | 株洲钻石切削刀具股份有限公司 | Heat treatment method of Ti-Al-N coating on hard alloy substrate |
| CN103068751A (en) * | 2010-08-24 | 2013-04-24 | 康宁股份有限公司 | Glass-forming tools and methods |
| CN103068751B (en) * | 2010-08-24 | 2015-09-30 | 康宁股份有限公司 | Forming of glass tool and method |
| US9586849B2 (en) | 2010-08-24 | 2017-03-07 | Corning Incorporated | Glass-forming tools and methods |
| CN102517560A (en) * | 2011-12-22 | 2012-06-27 | 长沙伟徽高科技新材料股份有限公司 | Heat treatment method of TiAlN coating |
| CN102517560B (en) * | 2011-12-22 | 2014-06-04 | 长沙伟徽高科技新材料股份有限公司 | Heat treatment method of TiAlN coating |
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