問題詳情
3. 冷加工後之金屬再重新加熱時，有所謂回復 ( recovery )，則下列何者為此階段退火之特點？
(A) 消除加工硬化之效果，使硬度漸回到冷加工前之狀態
(B) 結晶重新排列，產生微化晶粒之效果
(C) 晶粒生長，使加工後之變形晶粒回到等軸多角形晶粒之狀態
(D) 消除殘留應力，但金相組織及機械性質並未有明顯變化
(A) 消除加工硬化之效果，使硬度漸回到冷加工前之狀態
(B) 結晶重新排列，產生微化晶粒之效果
(C) 晶粒生長，使加工後之變形晶粒回到等軸多角形晶粒之狀態
(D) 消除殘留應力，但金相組織及機械性質並未有明顯變化
參考答案
答案：D
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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