核阀密封面无钴镍基熔覆层高温性能研究

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

设计一种无钴镍基合金材料Ni-3,其在高温下耐磨损和耐腐蚀性能接近或超过钴基合金。在350℃左右的温度下分别对Ni-3、Norem02和Stellite06进行高温摩擦磨损及高温腐蚀的实验。分析结果表明,Ni-3是一种较为理想的无钴合金材料,在高温耐磨损和耐腐蚀性能方面都比代钴材料Norem02优越;与钴基合金相比,Ni-3高温耐磨损性能与之接近,高温耐腐蚀性能稍逊色。在一定范围内,Ni-3可以替代目前在核阀、化工等阀门密封面上普遍使用的堆焊合金。

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.