High Temperature Performance of Cobalt-Free Nickel-Based Cladder on Nuclear Valve Sealing Surface

For the purpose of the high temperature wear resistance and corrosion resistance close to or over the cobalt-based alloy,one kind of cobalt-free nickel-based alloy Ni-3 is designed.And in the temperature about 350℃,high temperature friction and wear and high temperature corrosion experiments of Ni-3,Norem02 and Stellite06 are tested.Analysis showed that the Ni-3 is an ideal cobalt-free alloy.It is more excellent than Norem02 in the high temperature wear resistance and corrosion resistance;compared with the cobalt-based alloys,the high temperature wear resistance of Ni-3 is close to them,but the high temperature corrosion resistance of Ni-3 is slightly less than them.Therefore,within a certain rang,the Ni-3 can replace the surfacing that is commonly used in the valve sealing surface of the nuclear valves,chemical and so on.