冷轧压下率对300WG钢组织织构的影响

EFFECT OF COLD ROLLING REDUCTION ON STRUCTURE AND TEXTURE OF 300WG STEE

通过对退火板300WG钢进行不同冷轧压下率的相关试验,分析研究冷轧压下率对300WG钢组织性能及内部织构的影响规律。试验结果表明:随着冷轧压下率的不断提高,冷轧后的铁素体晶粒组织在轧制力作用下沿轧制方向不断被拉长,沿板厚方向呈不断压缩,晶粒尺寸不断变大,晶粒位错密度也不断增加;冷轧压下率从0提升至25%时,钢板维氏硬度急剧升高,冷轧压下率从25%至75%时,钢板维氏硬度变化不明显;冷轧后的300WG钢在γ纤维织构上的{111}<112>和{111}<110>织构得到了加强。

By conducting metallographic tests on annealed 300WG steel with different cold rolling reduction rates,the influence of cold rolling reduction rates on the microstructure performance and internal texture of 300WG steel was analyzed and studied.The experimental results show that as the cold rolling reduction rate continues to increase,the ferrite grain structure after cold rolling is continuously elongated along the rolling direction under the action of rolling force,and continuously compressed along the plate thickness direction.The grain size continues to increase,and the grain dislocation density also increases,the Vickers hardness of the steel plate increases sharply when the cold rolling reduction rate is increased from 0 to 25%,the Vickers hardness of the steel plate does not change significantly when the cold rolling reduction rate is increased from 25%to 75%,the{111}<112>and{111}<110>fabric of cold rolled 300 WG steel onγfiber fabric are strengthened.