研究了(/%)0.023Al_(sol)、0.035Al_(sol)、0.018~0.019Al_(sol)-0.012~0.014Ti和0.019~0.020Al_(sol)-0.031~0.032Nb微合金化对60 t BOF-LF-VD-300 mm×360 mm CC-连轧工艺生产的Φ120 mm ZF7渗碳钢(/%:0.18~0.20C、0.22~0.2...研究了(/%)0.023Al_(sol)、0.035Al_(sol)、0.018~0.019Al_(sol)-0.012~0.014Ti和0.019~0.020Al_(sol)-0.031~0.032Nb微合金化对60 t BOF-LF-VD-300 mm×360 mm CC-连轧工艺生产的Φ120 mm ZF7渗碳钢(/%:0.18~0.20C、0.22~0.25Si、1.22~1.30Mn、0.008~0.016P、0.019~0.029S、1.19~1.25Cr、0.001 8~0.002 2B)930℃加热时晶粒度混晶的影响。结果表明,在930℃7.5 h热处理条件下,当Al_(sol)为0.035%时ZF7钢未发生混晶现象,当钢中(/%)0.023Al_(sol)或0.018~0.019Al_(sol)-0.012~0.014Ti或0.019~0.020Al_(sol)-0.031~0.032Nb微合金化时,ZF7钢均发生了混晶现象,说明钢中有足够的Al_(sol)含量是防止ZF7钢发生混晶的关键因素。展开更多
文摘研究了(/%)0.023Al_(sol)、0.035Al_(sol)、0.018~0.019Al_(sol)-0.012~0.014Ti和0.019~0.020Al_(sol)-0.031~0.032Nb微合金化对60 t BOF-LF-VD-300 mm×360 mm CC-连轧工艺生产的Φ120 mm ZF7渗碳钢(/%:0.18~0.20C、0.22~0.25Si、1.22~1.30Mn、0.008~0.016P、0.019~0.029S、1.19~1.25Cr、0.001 8~0.002 2B)930℃加热时晶粒度混晶的影响。结果表明,在930℃7.5 h热处理条件下,当Al_(sol)为0.035%时ZF7钢未发生混晶现象,当钢中(/%)0.023Al_(sol)或0.018~0.019Al_(sol)-0.012~0.014Ti或0.019~0.020Al_(sol)-0.031~0.032Nb微合金化时,ZF7钢均发生了混晶现象,说明钢中有足够的Al_(sol)含量是防止ZF7钢发生混晶的关键因素。