that one was easy but I think this is what this site should be all about .Facts.
Those coatings are also used for fork tubes of high performance Bikes
Define "exotic." For anything that has high use threads (like a hub) or splines (like a hub or drive shaft) I think high hardness is at a premium - steel then is king. Of steels, it's not like cost is much of a factor.. and you're machining rather than welding it or anything, so go for one of the extreme high strength / fatigue alloys - like a 4340 or 300M. They tend to be popular for these kind of components, even aircraft landing gear (to my knowledge).thepowerofnone wrote:Would someone mind explaining why M300 is the logical choice? I am in no way questioning it, I am just curious how everyone jumped to it, especially when you consider just how many exotic choices F1 would have access to. I have actually used very similar driveshafts to these before but never gave a huge amount of thought to the material choice as it was a standardised part - phenomenally lightweight.
300M is a very high performance and very expensive 'steel', compared to anything in a road car it is 'exotic'Jersey Tom wrote:Define "exotic." For anything that has high use threads (like a hub) or splines (like a hub or drive shaft) I think high hardness is at a premium - steel then is king. Of steels, it's not like cost is much of a factor.. and you're machining rather than welding it or anything, so go for one of the extreme high strength / fatigue alloys - like a 4340 or 300M. They tend to be popular for these kind of components, even aircraft landing gear (to my knowledge).thepowerofnone wrote:Would someone mind explaining why M300 is the logical choice? I am in no way questioning it, I am just curious how everyone jumped to it, especially when you consider just how many exotic choices F1 would have
riff_raff wrote:If there is a spline on the part, then titanium is usually not a good choice, even if the spline is coated with titanium nitride. Titanium tends to gall in contact with any metal surface. Even spline teeth coated with titanium nitride would experience galling. While the titanium nitride coating is extremely hard, it is also very thin.
Steel alloy spline teeth can either be through hardened or case hardened to produce a tooth flank surface having adequate hardness to provide sufficient wear life for the application. Steel alloy splined shafts are often nitrided over all surfaces, since the nitriding process produces a residual compressive stress in the shaft surface, which improves fatigue life.