硼对Ti-IF钢力学性能及再结晶过程的影响

doi:10.13228/j.boyuan.issn0449-749x.20160363

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Abstract The effect of boron on mechanical properties and microstructures of hot-dip galvanized Ti-IF steel sheets was studied with universal testing machine， optical microscope and transmission electron microscope（TEM）. The reason of the influence of boron on the mechanical properties and microstructures was explained from the view of recrystallization behavior of cold rolled steel sheets with boron.Orientation densities of texture were studied byX-diffraction and misorientation angles were studied by electron back-scatter diffraction（EBSD）. Recrystallization behavior of cold rolled steel sheets with and without boron was studied with micro-hardness meter and optical microscope. The results showed that the grain size decreased， yield strength and tensile strengthincreased and plastic strain ratio decreased with increasing boron content up to 0.000 5%. Nitrogen precipitated as TiN and boron was solid dissolved in Ti-IF steel.By adding boron， the recrystallization behavior of IF steel was suppressed and the recrystallization temperature rose，which led to the increase of frequency of low-angle grain boundaries and decrease of percentage of {111} microtexture.It was thought to be the reason of change of mechanical properties and microstructures after adding boron.

Received: 11 August 2016 Published: 18 April 2017

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TG335.11

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Cite this article:

HU Yan-Hui. Effect of boron on mechanical properties and recrystallization behavior of Ti-IF steel sheets[J]. Iron and Steel, 2017, 52(4): 72-77.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20160363 OR http://www.chinamet.cn/Jweb_gt/EN/Y2017/V52/I4/72

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