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.
胡燕慧，陈凌峰，张 浩，尉 冬，李 洁，滕华湘. 硼对Ti-IF钢力学性能及再结晶过程的影响[J]. 钢铁, 2017, 52(4): 72-77.
HU Yan-hui，CHEN Ling-feng，ZHANG Hao，WEI Dong，LI Jie，TENG Hua-xiang. Effect of boron on mechanical properties and recrystallization behavior of Ti-IF steel sheets. Iron and Steel, 2017, 52(4): 72-77.
Yasuhara E.,Sakata K. and Hashitomo O. Effect of Boron on Resistance to Secondary Working Embrittlement in Extra-low-C Cold Rolled Steel Sheet[J]. ISIJ International, 1994, 34(1):99
[7]
Yasuhara E.,Sakata K. and Hashitomo O. Effect of Boron on Resistance to Secondary Working Embrittlement in Extra-low-C Cold Rolled Steel Sheet[J]. ISIJ International, 1994, 34(1):99
[8]
Yasunobu N. and Yoshihiro H.Origin of Recrystallization Texture Formation in an Interstitial Free Steel[J]. ISIJ International, 1996 36(4):451
[8]
Yasunobu N. and Yoshihiro H.Origin of Recrystallization Texture Formation in an Interstitial Free Steel[J]. ISIJ International, 1996 36(4):451
[9]
Ray R. K..,Jonas J. J. and Hook R. E. Cold Rolling and Annealing Textures in Low Carbon and Extra Low Carbon Steel[J]. International Materials Review, 1994, 39(4):129
[9]
Ray R. K..,Jonas J. J. and Hook R. E. Cold Rolling and Annealing Textures in Low Carbon and Extra Low Carbon Steel[J]. International Materials Review, 1994, 39(4):129
2017, Vol. 52 
