| Welcome to Altezza Club Of NZ/Australia. We hope you enjoy your visit. You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile, sending personal messages, and voting in polls. Registration is simple, fast, and completely free. http://s4.zetaboards.com/lexusaltezzaclub/topic/1148393/1/#new |
| How Random...; Altezzas popping up in strange places. | |
|---|---|
| Tweet Topic Started: Oct 27 2007, 12:27 PM (328 Views) | |
| jeremyflower | Oct 27 2007, 12:27 PM Post #1 |
|
Anything but soccer mom...
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
I've recently been doing some research on Titanium for a presentation we have to give as part of my course and I came across this passage: Blended Elemental Technique (BE) The traditional technique of titanium production is via the Kroll process, which involves chlorination of TiO2 ore in the presence of carbon and reacting the resulting TiCl4 with magnesium to produce titanium sponge. These processes take place at temperatures as high as 1040°C. The sponge particle range in size from 45 to 180 μm, with particles ~150 μm termed ‘sponge fines’. These fines are irregularly shaped and porous with a sponge like morphology. The fines are then blended with alloy additions; cold compacted into a green compact at up to 415 MPa then vacuum sintered at 1260°C to produce a 99.5% dense component. Hot Isostatically Pressing (HIP) can further increase the density of these parts and produce components more economically than cast or wrought parts, but the porosity present in the material degrades fatigue and fracture properties. The BE approach has been used to produce valves for the Toyota Altezza, golf club heads and softball bats. More recently, close to 100% dense Ti Grade 5 parts has been achieved using a hydrided powder along with 60:40 Al:V master alloy. The mechanical properties compare well with those exhibited by cast-and-wrought products. A cost estimate of less than $3.00 for a 0.320 gm automotive connection link has been made. Reading through and finding the bit about Toyota Altezza Valves just stuck me as incredibly random. Has anyone else come across anything similar? |
|
Blue 2001 AS300 Gita Z Edition Master Aeronautical Metalworker RNZAF Base Hobsonville Auckland Facebook: TheRealJeremyFlower | |
![]() |
|
| blitzNUR | Oct 27 2007, 02:55 PM Post #2 |
|
Lowered
![]() ![]() ![]() ![]() ![]()
|
from what some altezzaclub people said was only the intake valves which are Ti ? |
Hi !!
| |
![]() |
|
| alimac | Oct 27 2007, 02:57 PM Post #3 |
|
Canterbury, NZ
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
and I believe onlt on RS200 6MT |
| Yellow RS200z 6MT | |
![]() |
|
| jeremyflower | Oct 27 2007, 03:05 PM Post #4 |
|
Anything but soccer mom...
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
Unsure as to which ones are titanium, although it is used in jet engines and the combustion temperatures involved there are fairly high, so it's possible both intake and exhaust valves are titanium. I'm absolutely certain they wouldn't waste titanium on the valves of a 1G-FE though!! Not what you'd call a high performance engine ;-) |
|
Blue 2001 AS300 Gita Z Edition Master Aeronautical Metalworker RNZAF Base Hobsonville Auckland Facebook: TheRealJeremyFlower | |
![]() |
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · General Discussion · Next Topic » |





![]](http://z4.ifrm.com/static/1/pip_r.png)



8:38 PM Jul 11