深冷及碳化物喷覆处理对渗碳钢耐磨行为之影响EffectofSub.pdf

深冷及碳化物噴覆處理對滲碳鋼耐磨行為之影響 Effect of Sub-zero treatment and Carbide Spray Coating on the Wear behaviour of Carburized steel 邱六合 * 陳伯榕 * 林逸旻* 張珩 ** Liu-Ho Chiu Bo-Rong Chen Yi-Min Lin Heng Chang *大同大學材料工程學系 Department of Materials Engineering, Tatung University **文化大學機械工程學系 Department of Mechanical Engineering, Chinese Culture University 摘要 SNCM 415 steel was carburized and a JIS 本研究探討熱處理、深冷處理及高速火焰 SNCM 439 steel was quenched and tempered to 熔射碳化物噴覆處理對鎳鉻鉬鋼耐磨特性影 45HRC. The WC/Co coating about 125μm thick 響。JIS SNCM 415 熱處理為滲碳到有效硬化 was coated on surface of the two steels by the 層深度 0.6mm ，再進行深冷處理;JIS SNCM high velocity oxy-fuel (HVOF) spray. The 439 進行淬火回火熱處理到 45HRC;再分別經 experimental results indicate that microhardness 熔 射 噴 覆 (HVOF) 到 厚 度 約 125±25μm 之 of the WC/Co coating were found to be WC/Co 塗層。由實驗結果得知，經 HVOF 噴 1025±75HV. The wear testing was conducted 覆 WC/Co 塗層硬度介於 1025±75HV 之間。處 under 95.9N with 180 rpm at the type of 理試片進行荷重 95.9N ，轉速為180rpm 之塊 block-on-roller. From the results of 12hr wear 材對輥輪(Block-on-Roller)乾式磨耗試驗，其中 tests, the mass loss of sub-zero treatment SNCM 對磨輥輪硬度有 60 及 42HRC 二種。由磨耗結 415 specimen was decreased from 0.05g to 果顯示，以 60HRC 為對磨材經 12h 磨耗，滲 0.025g. meanwhile, the mass loss of carbide 碳 SNCM 415 試片經深冷處理後，由滲碳未深 coated SNCM 415 specimen by the HVOF 冷之 0.05g 降至 0.025g ，表面WC/Co 噴覆處 spraying was decreased from 0.025g to 0.002g. 理後，磨耗損失量由 0.025g 再降至 0.002g 。