焙烧蒸发循环泵用新型双相高硅不锈钢

Study on the New Multi-Phase High Silicon Stainless Steel Used for Cycle-pump of Roasing Evaporator

采用金相显微镜和Ｘ射线衍射相结合的方法，观察与分析ＫＳ－４钢的金相组织，测试了试验钢多项腐蚀性能，并研究不同热处理制度对其各项腐蚀性能的影响，从而找出满足各项性能指标的最佳热处理制度。通过对比表明，ＫＳ－４钢在１１５℃的含４２％Ｎａ２ＳＯ４、小于１％Ｈ２ＳＯ４、小于０．０５％ＺｎＳＯ４的盐浆溶液介质中，具有良好的耐蚀性能。

In this paper, the microstructure of KS-4 steel was analysed by means of optical microscope and Sray diffraction. Several corrosion-resistance properties of all the experimented steels were tested and the influence o f different heat-treatment mechanism of the KS-4 steel on the corrsion-resistance properties was studied and then the optimal heat-treatment mechanism was obtained. The practical using results show that the corrosion-resistance properties of KS-4 steel in a salt solution of 42% Na2SO4,less than 1% H2SO4 and less than 0. 05 %ZnSO4 at 115℃ is very good.