This balls and valve seats are comprise of tungsten carbide (WC) and Co or Ni in high temperature sintering.With high hardness, better wear-resistant, high-temperature corrosion -resistant and maching properties of high working accuracy.high finish etc. Widely supplied ball-rolling element in bearing industry, pump valve spool for fluid seal, check valve for pretroleum digger etc.also used in high-tech area in army and civil. The specification can be made upon customer' s requirements
