Abstract

In the present work, Mn-N duplex stainless steels (DSS) were deposited on a SUS304 steel plate by plasma arc surfacing welding. The effect of solution treatment and the ratio of ferrite to austenite on the cavitation erosion (CE) behavior of Mn-N DSS coating were investigated. The results showed that depositing Mn-N DSS on other material surfaces through the weld overlay can solve the CE problems. It was found that the CE resistance of the sample treated at 1080 °C was higher than that of samples treated at higher temperatures. The excellent resistance to CE was related to the low ratio of ferrite to austenite that was adjusted by the solution treatment. During the CE process of Mn-N DSS coating, the mechanical factor was the dominating factor.

摘要

在目前的工作中，Mn-N 双相不锈钢 (DSS) 通过等离子弧堆焊焊接在 SUS304 钢板上。研究了固溶处理和铁素体与奥氏体的比例对 Mn-N DSS 涂层的空蚀 (CE) 行为的影响。结果表明，通过堆焊在其他材料表面沉积 Mn-N DSS 可以解决 CE 问题。发现在 1080°C 处理的样品的耐 CE 性能高于在更高温度处理的样品。优异的 CE 抗性与通过固溶处理调整的铁素体与奥氏体的低比率有关。在Mn-N DSS涂层的CE过程中，机械因素是主导因素。