无取向电工钢冷轧及退火织构的演变

Evolution of Cold Rolling and Annealing Textures in Nonoriented Electrical Steel

运用不同冷轧、退火工艺的实验及ODF分析方法,分析了电工钢50W600的热轧织构、冷轧织构及再结晶织构的演变。研究表明:热轧带几乎是随机织构,α线非常弱;随着冷轧变形量的提高,晶粒在α线取向附近聚集程度不断提高,变形81%时,{001}<110>和{112}<110>取向密度分别为12和14。随退火温度升高和保温时间延长,α线的取向密度下降,{001}<110>和{112}<110>取向密度急剧降低,γ线{111}<112>密度显著增加,晶粒取向绝大多数聚集在γ线{111}<112>取向附近。通过控制冷轧及退火工艺,可有利于发展高{100}织构组分的冷轧无取向电工钢。

An overall study of hot rolling texture and the evolution of cold rolling and recrystallization textures in 50W600 electrical steels were conducted by orientation distribution function analysis and experiments on cold rolling and annealing. Results show that the hot band presents almost random texture and the intensity of α-fibre texture is weak. With increasing cold rolling deformation rate the intensity of α-fibre texture is increased, the intensity of { 001 } 〈 110〉 and { 112 } 〈110〉 are 12 and 14 respectively at the cold reduction rate of 81%. With increasing annealing temperature and holding time the intensity of α-fibre texture is weakened and the intensity of {001} 〈110〉 and { 112 } 〈110〉 is greatly decreased but the { 111 } 〈112〉 of y- fibre texture is significantly increased, presenting that most of grains are oriented along y-fibre texture. It＇s favorable to develop the cold rolled nonoriented electrical steels with strong { 100} texture by controlling the parameters of cold rolling and annealing.