ժҪ 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 �Ū�Cu phase. With a prerequisite of appropriate corrosion resistance, the precipitation hardening could significantly improve the E��C resistance of the materials.
Abstract��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 �Ū�Cu phase. With a prerequisite of appropriate corrosion resistance, the precipitation hardening could significantly improve the E��C resistance of the materials.
LI Ping;CAI Qi��zhou;WEI Bo��kang;ZHANG Xian��zhong. Effect of Aging Temperature on Erosion��Corrosion Behavior of 17��4PH Stainless Steels in Dilute Sulphuric Acid Slurry[J]. �й������ڿ���, 2006, 13(5): 0-73.
LI Ping;CAI Qi��zhou;WEI Bo��kang;ZHANG Xian��zhong. Effect of Aging Temperature on Erosion��Corrosion Behavior of 17��4PH Stainless Steels in Dilute Sulphuric Acid Slurry. Chinese Journal of Iron and Steel, 2006, 13(5): 0-73.
2006, Vol. 13 