TiSurf - New Solution Titanium

TiSurf® - New Solution Titanium

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.

Features

Surface is 3x harder than hard chrome
Excellent tribological properties
Extremly low friction
High wear resistance
High strength-to-weight ratio
Exceptional good corrosion resistance
Biocompatible
Heat resistant
Non magnetic

Advantages

Lower energy consumption
Reduced maintenance
High corrosion resistance
Ultra-low friction
Less lubrication
Lighter weight
Low-noise
Longer "green" lifecycle
Sustainability

Early applications

NASA satellite probe systems, seven projects since Cassini in 1997
Drivetrain and suspension in racing since 1992, e.g. F1, MX and LeMans
Separation of blood plasma
Blood vessel valves
Hydraulic rods for oil platforms

Markets

Aerospace industry
Automotive industry
Energy sector
Process industry
Off-shore industry
Marine industry
Medical industry
Consumer market

Components

Shafts
Tubes
Fixings
Bearings
Pistons
Bolts and nuts
Cylinders
Valves
Hydraulic systems
Prostheses

Visions

New constructions/ structures
New designs
Lighter structures
More energy efficient
Improved environment
More profitable business
Increased competitiveness through improved production methods

TiSurf^® 1 & 3

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

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

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 (Patent: SE540497C2).

A hardening, not a coating

TiSurf^®

A surface hardening, not a coating
Becomes “one” with the substrate
Nitrogen diffuses into the substrate’s titanium surface and converts the surface to titanium nitride (TiN)
The result is a compact hybrid material of ceramic and metal

Versus other methods

PVD, Physical Vapor Deposition:

A physical process where a thin layer of the film material (e.g. TiN) is deposited on the substrate through condensation
The result is a layer of coating that has variable strength of ties
Tendency to flake

CVD, Chemical Vapor Deposition:

CVD is an atmosphere controlled process that creates a thin film coating (e.g. TiN) through reactions between gases and substrates
The result is a coating with a chemical/metallurgical binding of variable strength
Tendency to flake

TiSurf^® components vs. steel components

Shock absorber rods

40% lower variable weight
No hard chrome
Surface evenness at nanoscale level
No corrosion
Better traction
Shorter braking distance
Lower fuel consumption

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.

Engine Piston wrist pins

40% lower variable weight
Surface evenness at nanoscale level
Withstands higher temperatures*
Withstands higher loads
Lower emissions
Lower fuel consumption

Higher operating temperature of the engine produces less emissions and lower fuel consumption, but requires components that can withstand higher temperatures.

*Steel: 300-500^o C, 800-1150 HV, hardness decreases with temperature.
TiSurf^®: 400-750^o C, 2900-3100 HV, hardness highly temperature stable.

Specifications

	TiSurf Titanium Gr1	TiSurf Titanium Gr2	TiSurf Titanium Gr5	TiSurf Titanium Gr9
Color TiN	Gold	Gold	Gold	Gold
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.

Interested in TiSurf®?
Contact SentinaBay.

The owner of TiSurf® technology is SentinaBay AB.

Address

Office: Kyrkogatan 1, 792 30 Mora, Sweden

Mail: SentinaBay AB, c/o NewSoTech,
Box 256, SE792 24 Mora

Phone

+46 250 141 00

Email

info@sentinabay.com