本文選題：取向電工鋼 + 立方織構(gòu)�。� 參考：《遼寧科技大學(xué)》2015年碩士論文

【摘要】：取向電工鋼作為一種重要的軟磁材料,已經(jīng)成為電力、電子和軍事工業(yè)中不可或缺的軟磁材料,主要應(yīng)用于各類(lèi)變壓器的鐵芯。取向電工鋼的制造工藝和設(shè)備復(fù)雜,成分控制嚴(yán)格,雜質(zhì)含量要求極低,制造工序長(zhǎng)和影響因素多,因此,其產(chǎn)品質(zhì)量的好壞常被作為衡量一個(gè)國(guó)家特殊鋼制造技術(shù)水平的重要標(biāo)志,并且取向電工鋼又被稱(chēng)為鋼材中的“藝術(shù)品”。目前商業(yè)化生產(chǎn)的取向電工鋼都具有高斯織構(gòu)的,而本文中所研究的取向電工鋼是具有立方織構(gòu),由于取向的特殊性,使得取向電工鋼在橫向和軋向都是易磁化的,所以具有非常重要的研究意義。冷軋是連接熱軋與再結(jié)晶退火的關(guān)鍵工序,也是決定再結(jié)晶織構(gòu)和組織演變特征的關(guān)鍵因素之一。二次再結(jié)晶過(guò)程對(duì)于取向電工鋼獲得高取向度的立方織構(gòu)有著非常重要的影響,因此,探索有效調(diào)控取向電工鋼形變織構(gòu)以及初次再結(jié)晶織構(gòu)的方法,是發(fā)展取向電工鋼先進(jìn)技術(shù)的方向;二次再結(jié)晶過(guò)程中如何有效控制微觀組織的轉(zhuǎn)變對(duì)研究取向電工鋼立方織構(gòu)的形成有著重要的意義。本文以鞍山鋼鐵集團(tuán)公司生產(chǎn)的普通取向電工鋼為研究對(duì)象,在實(shí)驗(yàn)室條件下,采用冷軋、真空管式爐氣氛退火的方式,借助微觀織構(gòu)分析方法——EBSD技術(shù)分析從熱軋板到最終成品過(guò)程中立方織構(gòu)的如何形成的、二次再結(jié)晶過(guò)程中第二相粒子是如何影響立方織構(gòu)形成的,通過(guò)對(duì)觀察結(jié)果進(jìn)行分析得到了如下的結(jié)論:(1)采用縱橫交叉軋制的二次冷軋法和中間退火的方法,得到了厚度為0.3mm、取向較為集中的、以(100)[001]立方織構(gòu)為主的雙取向硅鋼。(2)從熱軋板到二次冷軋完成,電工鋼板中的織構(gòu)類(lèi)型由{001}110到{111}112再到{111}110,經(jīng)過(guò)中間退火后的六道次織構(gòu)類(lèi)型變成了{(lán)001}100,在再結(jié)晶退火過(guò)程中,主要的織構(gòu)類(lèi)型為γ纖維織構(gòu),隨著再結(jié)晶溫度的升高,立方織構(gòu)先消失而后強(qiáng)度逐漸增高。(3)二次冷軋工藝為電工鋼板提供了大量的(100)面織構(gòu),再結(jié)晶退火過(guò)程中形成的γ纖維織構(gòu)為立方織構(gòu)的形成提供了充足的能量,高溫凈化退火過(guò)程中,(100)[001]取向晶粒的低的表面能,使立方織構(gòu)晶粒的選擇性優(yōu)先生長(zhǎng),吞并其他晶粒。(4)通過(guò)對(duì)立方織構(gòu)和晶界特征分布的情況分析看,隨著溫度的升高,立方織構(gòu)附近特征晶界Σ13b增多,而Σ5、Σ7數(shù)量減少,說(shuō)明Σ5晶界具有較高的遷移率,對(duì)立方織構(gòu)形成有利。同時(shí)對(duì)再結(jié)晶過(guò)程的鋼板進(jìn)行微觀組織觀察發(fā)現(xiàn),在晶界處出現(xiàn)了細(xì)小的第二相粒子,如Al N,這些粒子晶界附近溶解與固溶,產(chǎn)生了釘扎效應(yīng),阻礙了晶界的長(zhǎng)大,這些因素都為立方織構(gòu)晶粒的異常長(zhǎng)大了提供了有利條件。
[Abstract]:As an important soft magnetic material, oriented electrical steel has become an indispensable soft magnetic material in power, electronics and military industries. It is mainly used in the core of various transformers. The manufacturing process and equipment of oriented electrical steel are complex, the composition is strictly controlled, the impurity content is very low, the manufacturing process is long and the influence factors are many, therefore, The quality of its products is often regarded as an important symbol to measure the manufacturing technology level of special steel in a country, and the oriented electrical steel is also called "art" in steel. At present, the oriented electrical steels produced commercially all have Gao Si texture, and the oriented electrical steels studied in this paper have cubic texture. Because of the particularity of orientation, the oriented electrical steels are magnetized in both transverse and rolling directions. So has the very important research significance. Cold rolling is the key process to connect hot rolling and recrystallization annealing, and it is also one of the key factors to determine the characteristics of recrystallization texture and microstructure evolution. The secondary recrystallization process plays an important role in obtaining high orientation cubic texture of oriented electrical steel. Therefore, the methods of controlling deformation texture and primary recrystallization texture of oriented electrical steel are explored. It is important to study the formation of cubic texture of oriented electrical steel how to control the transformation of microstructure effectively in the process of secondary recrystallization. In this paper, the common oriented electrical steel produced by Anshan Iron and Steel Group Co., Ltd is taken as the research object. Under the condition of laboratory, the cold rolling and vacuum tube furnace atmosphere annealing are adopted. With the help of microtexture analysis method, EBSD technique is used to analyze how the cubic texture is formed in the process from hot rolled plate to final product, and how the second phase particles affect the formation of cubic texture in the process of secondary recrystallization. Through the analysis of the observation results, the following conclusion is drawn: 1) by using the secondary cold rolling method and the intermediate annealing method, the thickness is 0.3 mm and the orientation is more concentrated. The double orientation silicon steel with [001] cubic texture is finished from hot rolling plate to secondary cold rolling. The texture type of electrical steel plate changes from {001} 110 to {111} 112 to {111} 110. The six times texture type after intermediate annealing becomes {001} 100. During recrystallization annealing, The main texture type is 緯 -fiber texture. With the increase of recrystallization temperature, the cubic texture disappears first and then the strength increases gradually. The 緯 -fiber texture formed during recrystallization annealing provides sufficient energy for the formation of cubic texture. In the process of high temperature purification annealing, the low surface energy of [001] oriented grain makes the selective growth of cubic texture preferential. Annexation of other grains. (4) from the analysis of the distribution of opposite square texture and grain boundary characteristics, it can be seen that with the increase of temperature, the characteristic grain boundary 危 13b near cubic texture increases, while the number of 危 5 and 危 7 decreases, which indicates that 危 5 grain boundary has higher mobility. The opposite square texture is favorable. At the same time, the microstructure of the recrystallized steel plate was observed. It was found that small second phase particles, such as Al N, dissolved and dissolved near the grain boundary, which resulted in pinning effect and hindering the growth of grain boundary. These factors provide favorable conditions for the abnormal growth of cubic texture grains.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TG142.1

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本文編號(hào)：1906502