Effect of Aging Temperature on Erosion-Corrosion Behavior of 17-4PH Stainless Steels in Dilute Sulphuric Acid Slurry

查看全文 作　　者：LI Ping CAI Qi-zhou WEI Bo-kang ZHANG Xian-[1]zhong 机构地区：[1]State Key Lab of Plastic Forming Simulation and Dies/Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China 出　　处：《Journal of Iron and Steel Research(International)》索引2006年第13卷第5期,共6页 摘　　要：The effect of aging temperature on erosion-corrosion (E-C) behavior of 17-4PH stainless steels in dilute sulphuric acid slurry containing solid particles was studied by using self-made rotating E-C apparatus. The effect of impact velocity on E-C behavior of 17-4PH steels at different aging temperatures was analyzed. Surface micrographs of the specimens after E-C test were observed by using scanning electron microscope (SEM). The results showed that under the condition of the same solution heat treatment, when aging temperature ranged from 400 ℃ to 610 ℃, the hardness reached the highest value near the temperature 460 ℃. The characteristics of E-C for 17-4PH stainless steels at different aging temperatures were as follows: pure erosion (wear) was dominant, corrosion was subordinate and at the same time corrosion promoted erosion. The effect of aging temperature on E-C rate of 17-4PH steels was not significant at low impact velocity, but it was found that E-C resistance of 17-4PH steels aged near 460 ℃ was the most excellent due to the best precipitation strengthening effect of fine and dispersed ε-Cu phase. With a prerequisite of appropriate corrosion resistance, the precipitation hardening could significantly improve the E-C resistance of the materials. 关 键 词：老化温度 沉淀硬化 不锈钢 腐蚀 硬度