Cu 析出強化型極低炭素冷延鋼板の再結晶集合組織におよぼす Cu, Ti 系析出物の影響

概要

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The mechanism of improved r-value of continuously annealed steel sheets by high temperature hot-coiling in Cubearing ultra low C interstitial-free(IF) steel has been investigated by using the hot-bands with different morphologies of precipitates obtained by various heat-treatment in the temperature range of 500℃ to 800℃. By the ODF analysis of recrystallization texture, it was clarified that the γ-fiber texture (<111>//ND) extremely developed by hot-coiling at the temperature ranging from 700 to 750℃. TEM observations also revealed that the complex-precipitates composed of Ti-carbosulfide and Cu were observed only in the same range of hot-coiling temperature. Improvement of r-value by high temperature hot-coiling is caused by the development of γ-fiber texture by precipitation of Cu combined with coarse Ti-carbosulfides which avoids the detrimental influence of fine pre-precipitation of Cu in matrix.
社団法人日本鉄鋼協会の論文
1994-01-01