sus403 回火麻田散铁不锈钢的冲蚀磨耗 particle erosion behavior of .pdfVIP

Journal of China Institute of Technology Vol.33-205.12 SUS403 回火麻田散鐵不銹鋼的沖蝕磨耗 Particle Erosion Behavior of SUS403 Tempered Martensitic Stainless Steel 溫東成* 吳朝麟** D.C. Wen and C.L. Wu *中華技術學院機械系副教授 **機電光所研究生 Department of Mechanical Engineering, China Institute of Technology Abstract The particle erosion behavior of SUS403 martensitic stainless steel tempered with five different temperatures range from 200℃ to 600℃ were studied as a function of impact angle and hardness. The results indicate that, the dominated mechanisms for material removal are cutting and extrusion at low and high impact angles, respectively. A transition of mechanism mixed by cutting and crater occurs at medium impact angle. Grain boundary cracking is often found for all impact angles that seem to be one of the major erosion mechanisms for two-phase materials mixed with martensite and ferrite. The erosion rate of all the experimental materials increases first, and then decreases with increase in impact angle. Thus, the maximum erosion rate occurred at the angle between 30ο ο ο ο and 45 . At 15 and 30 of impingement, the erosion rate is virtually independent of hardness. While impact angles exceed than 30ο, erosion rate increases with increasing hardness. KEY WORDS: particle erosion; martensitic stainless steel; impact angle; hardness; tempering; secondary hardening. 摘 要 本文探討AISI403 麻田散鐵不銹鋼經200~600℃回火處理後的沖蝕磨耗，分別 討論沖蝕角度與硬度對沖蝕速率和沖蝕機構的影響。結果顯示，低角度沖蝕以長 條狀切削凹坑為主，高角度時為推擠凹坑和裂縫，中間角度則混有前述兩種特徵。 o o 沖蝕率在沖擊角度30 以