高強度耐磨耗硼化鉻化鍍層之特性研究

Characterization of High-strength and Anti-wear B-Cr Coatings

本研究以AISI 1095高碳鋼作為基材，結合輥軋活化處理及硼化、鉻化兩階段粉浴製程為表面改質以改善原材之耐磨性、表面硬度及抗蝕性。實驗先以氟化物及氯化物作為硼化催化劑進行初步實驗，並選擇硼化速率較高之催化劑進行粉浴硼化處理，接著對硼化完成之試片施予鉻化處理，而後進行鍍層特性之測試。以KBF4為催化劑之硼化鍍層厚度、硬度、耐蝕性及耐磨耗能力都較高，試片硼化後再進行鉻化處理，可得到一層硬度更高、耐蝕性更好且更耐磨之硼化-鉻化鍍層。

A new surface-modification method was developed in this study for enhancing the wear resistance, hardness, and corrosion resistance of rolled high-carbon steels treated with a two-step B-Cr process. Test specimens were first pack boronized for two hours to evaluate the efficiencies of different activators. The thickness, corrosion resistance and hardness of the specimens were increased with KBF4 and NH4F as the boronization activator. The specimen which was first boronized with the selected activator for four hours and then chromized for two hours formed a dense and continuous boronized-chromized coating. The chromization process further improved the hardness, corrosion resistance and wear resistance of the boronized specimen.