All very good info and feedback on carbide chains. However, please know that carbide contains cobalt, whose dust particles are highly carcinogenic. Any type of sharpening, diamond file, dremel or diamond wheel will produce fine dust particles. If you choose to sharpen the chain yourself, dust evacuation or proper ventilation is a must! Do not breathe it. It doesn’t take much to ruin your day….
Full disclosure: I’ve worked, in a past career,for a Swiss machine tool mfgr who produces grinding machines for the carbide cutting tool industry. We used high amounts of flood coolant, along with dust extraction. One time, I did service work at a “Stellite” plant in Canada , where they machine materials that contained cobalt. Life expectancy for their retirees was an average of 2-5 yrs. Cobalt in fines/dust form is as bad or worse than asbestos. Do your research before you sharpen carbide.
Peace…….