免固溶化處理雙相不銹鋼開發之可行性研究

Development of Duplex Stainless Steel by ACC Process

本文探討以加速冷卻製程生產2205不銹鋼而省略固溶化處理之可行性。研究方法包括：分別改變不同起冷溫度（900及800℃）及冷卻速率（空冷、15℃/s及80℃/s）處理，探討加速冷卻製程及固溶化處理2205雙相不銹鋼之顯微組織、機械性質及耐蝕性質變化。結果發現採用900℃高溫起冷之加速冷卻製程處理之試片，除了韌性及均勻腐蝕性質略差外、強度、局部腐蝕及應力腐蝕之抵抗能力均和固溶化處理相當。

The possibility of manufacturing 2205 duplex stainless steel (DSS) by accelerated cooling control (ACC) process without solution treatment was investigated in this paper. Different initial cooling temperatures (900 or 800℃) and cooling rates (air, 15℃/s or 80℃/s) were conducted to study the variation of microstructure, mechanical property and corrosion resistance of DSS. The experimental results showed that the specimen treated by high temperature ACC process possessed similar strength and corrosion resistance as compared to those of the specimen achieved by traditional solution treatment, however, the toughness is changed in reverse manner.