差温轧制工艺对FH36厚板组织与性能的影响  

Influence of Temperature Gradient Rolling on Micro-structure and Properties of FH36 Thick Plate

作　　者：冯赞 FENG Zan(Xiangtan Iron and Steel Group Co.,Ltd.,Xiangtan 411101,China)

机构地区：[1]湘潭钢铁集团有限公司,湖南有湘潭411101

出　　处：《金属材料与冶金工程》2024年第4期21-24,共4页Metal Materials and Metallurgy Engineering

摘　　要：为提高特厚钢板的心部性能,对150 mm厚调质FH36的粗轧采用正常大压下工艺、差温小压下轧制工艺、差温大压下轧制工艺,轧制后采用同样的热处理工艺进行调质热处理。试验表明:正常大压下工艺,轧制最大单道次压下率22%,轧制扭矩达4000 N·m,轧制调质热处理后钢板晶粒度约9级,各项性能良好;采用差温大压下轧制工艺生产的钢板经调质热处理后,与正常大压下工艺相比,心部晶粒变小达到10.5级,钢板心部的冲击韧性和强度明显提升;采用差温小压下轧制工艺生产的钢板经调质后,心部冲击韧性与强度变化较小。因此差温小压下轧制工艺可以有效降低轧制生产负荷,或在生产特殊钢种时充分利用轧制能力有效增加压下量。To improve the middle thickness performance of ultra-thick steel plates,the rough rolling of 150 mm thick quenched and tempered FH36 adopts the normal large reduction process,temperature gradient rolling with small reduction process,and temperature gradient rolling with large reduction process.After rolling,the same heat treatment process is used for quenching and tempering heat treatment.The experiment shows that under normal large reduction process,the maximum single pass reduction rate during rolling is 22%,the rolling torque is up to 4000 N·m,and the grain size of the steel plate after rolling,tempering,and heat treatment is about 9 levels,with good performance.The steel plate produced by the high reduction rolling process using temperature gradient rolling is subjected to quenching and tempering heat treatment.Compared with the normal high pressure rolling process,the grain size at the center of the steel plate has decreased to level 10.5,and the impact toughness and strength at the center of the steel plate have been significantly improved.The steel plate produced by the low reduction rolling process using temperature gradient rolling has little change in core impact toughness and strength after quenching and tempering.Therefore,the temperature gradient rolling process can effectively reduce the rolling production load,or fully utilize the rolling capacity to increase the effective reduction when producing special steel grades.

关 键 词：差温轧制 FH36 特厚板 冲击韧性 

分 类 号：TG156.4[金属学及工艺—热处理]