同时脱碳氮化Hi-B钢再结晶退火后组织和织构的表征

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Journal of Iron and Steel Research(International) Pub Date : 2017-12-01 DOI:10.1016/S1006-706X(18)30020-7
Li Xiang , Zhe Rong , Bing Fa , Hai-jun Wang , Sheng-tao Qiu
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引用次数: 4

摘要

介绍了利用一次再结晶退火工艺制备高磁感应度晶粒取向硅钢(Hi-B钢)的工艺过程,并在实验室中同时实现了渗氮和脱碳。利用光学显微镜、扫描电镜和电子背散射衍射技术对样品的微观结构和织构进行了表征。利用确定的晶粒尺寸不均匀系数σ*和织构系数AR(晶粒尺寸均值与标准差之比)这两个微观组织参数,在两个特定温度下对样品进行不同氮含量的渗氮处理;后者为有害织构与包括{110}<001>在内的有益织构的总体积分数之比。当N含量从0。0055 %至0。在835℃和875℃退火后,得到的再结晶晶粒尺寸减小,但σ*变化不大;退火温度从835℃升高到875℃,晶粒尺寸增大,σ*增大。此外,注入氮含量和温度对退火过程中形成的初级再结晶织构的组成影响不显著。然而,温度升高导致{001}<120>{110} <001>纹理,但{114}<481>和γ纤维织构以及由此导致的AR降低。
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Characterizing microstructure and texture after recrystallization annealing of Hi-B steel with simutaneous decarburization and nitriding

How to manufacture the high magnetic induction grain-oriented silicon steel (Hi-B steel) by the process featured with the primary recrystallization annealing was demonstrated, during which nitriding and decarburizing were simultaneously realized in laboratory. By the techniques of optical microscope, scanning electronic microscope and electron backscattered diffraction, both the microstructure and the texture in the samples were characterized. The samples had been subjected to nitriding to different nitrogen contents at two specified temperatures using the two defined microstructural parameters : the grain size inhomogeneity factor σ* and the texture factor AR. The former is the ratio of the mean value to standard deviation of grain sizes; the latter is the ratio of the total volume fraction of the harmful textures to that of beneficial textures including {110} <001>. When the N content increased from 0. 0055 % to 0. 0330% after the annealing at both 835 and 875 °C, the resultant recrystallized grain size decreased hut σ* changed little; whilst the rise of annealing temperature from 835 to 875 °C resulted in the increase in both grain size and σ*. Moreover, either the injected N content or temperature had insignificant influence on the components of primary recrystallization texture developed during annealing. However, the increase of temperature led to the decreases in both intensity and volume fraction of {001} <120> and {110} <001> textures but increases in the {114} <481> and γ fiber textures and the resultant decrease of AR.

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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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