TiSurf® is a process that converts the surface of the metallic titanium into a ceramic titanium nitride.The TiSurf® diffusion method transforms the titanium from the surface down through the metal, providing a hardness gradient that increases from the interior of the metal (115 ‐ 460 HV) through to the surface (up to 3 100 HV). The thickness of the titanium nitride layer can also be controlled in the conversion process.
TiSurf® provides real hybrid material possibilities!TiSurf® is approved for titanium (grades 1, 2, 3, 4, 5, 7, 9 and 23) and zirconium.
TiSurf® is a ceramic/metal hybrid material with a surface of titanium nitride and a core of titanium. The titanium surface is chemically converted to titanium nitride by means of a depth hardening nitration process that is patent-pending. (TiSurf® Trademark EU: 014632822 and US: 5,070,814)
TiSurf® 1 processing consists of nitration in a vacuum. The process can be steered to provide the relevant functional characteristics of the titanium components. It is appropriate for all applications where extended service intervals and reduced friction are desired, such as in piston rods, hydraulic details, tubes, valves and fasteners. TiSurf® 1 is well suited to implement as a step in a value chain for traditional industry production, including turning and milling.
TiSurf® 3 processing combines ”double” hardening nitration, over pressure (HIP) and quenching. It provides a deeper hardening than TiSurf® 1. Every step in the process, nitration, HIP and quenching, can be controlled to design the functionality of the components.
It is suitable for high performance applications, eg. aerospace, defense, process, and energy industries. TiSurf® 3 is ideal as part of a value chain with net shape production, such as 3D printing and pressing of powder. TiSurf® 3 is patent applied; application 1650705-5.
Finer surface provides less friction. Lower friction provides better handling. Better road handling provides shorter braking distances and lower fuel consumption, as well as greater comfort for passengers.
Higher operating temperature of the engine produces less emissions and lower fuel consumption, but requires components that can withstand higher temperatures.
*Steel: 300-500o C, 800-1150 HV, hardness decreases with temperature.
TiSurf®: 400-750o C, 2900-3100 HV, hardness highly temperature stable.
|TiSurf Titanium Gr1||TiSurf Titanium Gr2||TiSurf Titanium Gr5||TiSurf Titanium Gr9|
|Weight Ti, g/cm3||4.51||4.51||4.42||4.51|
|Elastic Modulus Ti, GPa||105 - 120||105 - 120||107 - 122||100 - 103|
|Coefficient of Thermal Expansion Ti, m m-1 °C-1||9.5 x 10-6||9.5 x 10-6||9.4 x 10-6||9.4 x 10-6|
|Proof strength Ti, Rp0.2 MPa min||220||275 - 450||825 - 910||483|
|Tensile strength Ti, Rm MPa min||345||345||895||620|
|Elongation Ti, A % min||35||2||10||15|
|Hardness TiN outermost layer, HV||2 900 - 3 100||2 900 - 3 100||2 900 - 3 100||2 900 - 3 100|
|Hardness Ti2N second layer, HV||1 200 - 1 500||1 200 - 1 500||1 200 - 1 500||1 200 - 1 500|
|Hardness Ti, HV||115||220||330||250 - 280|
|Melting point Ti, °C||1 670||1 665||1 604 - 1 660||1 700|
|Thermal conductivity Ti, W/m-K||16||16.4||6.7||8.3|
|Friction TiN against steel, dry, μ||0.5||0.5||0.5||0.5|
|Friction TiN against TiN, dry, μ||0.4||0.4||0.4||0.4|
The data and other information contained herein are derived from a variety of sources which SentinaBay AB believes are reliable. Because it is not possible to anticipate specific uses and operating conditions, such as titanium quality and titanium parts construction, SentinaBay AB urges you to consult with our technical service personnel on your particular applications.
Sources: http://www.haraldpihl.se/attachments/226_titan.pdf, http://smt.sandvik.com/se/produkter/tube-pipe-fittings-and-flanges/tubular-products/titanium-tubes/#tab-mechanical-properties, https://sv.wikipedia.org/wiki/Titan, https://en.wikipedia.org/wiki/Titanium, http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MTU010, http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MTA321, http://www.matweb.com/search/datasheet.aspx?matguid=c27e9d21a20a4d2fb2332abba2379c7a&n =1&ckck=1, http://www.tct.it/assets/titanium-ti3al2.5v-gr-9---alpha-annealed.pdf, http://www.titaniuminfogroup.co.uk/userfiles/files/PDFs/data-sheet-1.pdf, http://www.timet.com/datasheets-and-literature, Materials Properties Handbook: Titanium Alloys, R. Boyer, G. Welsch, and E. W. Collings, eds. ASM International, Materials Park, OH, 1994, Structural Alloys Handbook, 1996 edition, John M. (Tim) Holt, Technical Ed; C. Y. Ho, Ed., CINDAS/Purdue University, West Lafayette, IN, 1996.