發(fā)布時間：2018-05-24 06:22

  本文選題：無取向硅鋼 + 相變��； 參考：《材料熱處理學(xué)報》2016年01期

【摘要】：測量了W600無取向硅鋼(1.35Si-0.25Mn-0.28Al)的靜態(tài)CCT曲線,根據(jù)靜態(tài)相變點測量了W600的動態(tài)CCT曲線。根據(jù)動態(tài)相變點使用Gleeble3500模擬了實際熱軋過程,獲得了不同冷速的再結(jié)晶組織,使用EBSD技術(shù)研究了不同冷卻速度下獲得的熱軋試樣的微觀織構(gòu)。使用SEM和EDS觀察了W600鋼的鑄坯以及不同冷速獲得試樣中的析出物分布情況。實驗結(jié)果表明:在無取向硅鋼的α→γ相變中,冷卻速度越低相變溫度越高,在動態(tài)相變中,當(dāng)冷卻速度為0.75℃/s時,相變開始溫度為988℃,相變結(jié)束溫度為875℃;施加形變也有利于相變溫度的提高。熱軋模擬實驗中,較低的冷卻速度有利于獲得粗大的再結(jié)晶晶粒;隨著冷卻速度減小,立方織構(gòu)和γ織構(gòu)含量上升,旋轉(zhuǎn)立方織構(gòu)含量下降,其中在冷速為0.25℃/s時,{111}121織構(gòu)含量達28.5%,{111}100織構(gòu)含量達32.4%。Al N和Mn S為W600鋼中的典型析出物。鑄坯中析出Al N析出物和Mn S+Al復(fù)合析出物平均尺寸均高于后續(xù)熱軋模擬試樣。熱軋模擬實驗中,冷速較快時,存在大量細小彌散狀的Mn S析出物,Al N存在于Al N+Mn S復(fù)合析出物而存在,單獨存在的Al N析出較少。當(dāng)冷速降低時,析出物的總數(shù)量減少且尺寸變大,單獨存在的Mn S析出物逐漸消失。
[Abstract]:The static CCT curves of W600 non-oriented silicon steel (1.35Si-0.25Mn-0.28Al) were measured, and the dynamic CCT curves of W600 were measured according to the static phase transition points. According to the dynamic phase change point, the actual hot rolling process was simulated by Gleeble3500, and the recrystallization structure at different cooling rates was obtained. The microtexture of hot rolled samples at different cooling rates was studied by EBSD technique. The distribution of precipitates in W600 steel was observed by SEM and EDS. The experimental results show that the lower the cooling rate, the higher the phase transition temperature in the non-oriented silicon steel. In the dynamic phase transformation, when the cooling rate is 0.75 鈩，

本文編號：1928016