if your saw can take a wider blade, try the stellite tipped blades.
they look like a carbide( swaged tips) no need for set, cut beautifully and clean, very smooth cut, cheaper than carbide, and you can resharpen them many times- we get 10 to 14 sharpenings out of a blade!- running at least 4 solid hours on each sharpening.
the very best set tooth blade will only give about 2 hrs run time, with about 2 to 3 sharpenings.
doing the math, considering the higher cost of the stellites, we get a cheaper saw cost per hour using the stellite!
mad max is right- heat is the enemy!!!!
if using a set tooth blade, make sure you have enough set on the teeth, so that the bands back is not experiencing excessive friction and generating heat.
water cooled set ups are the best, but not always practical.
you can wax the blades with bees wax or some similar compound, it will help some!
you can hold a block of wax against the sides of the band while its running- just watch the fingies!!!-
remove platten insert first, so you dont wreck the blade!