Abstract: The production flow sheet for 2. 5 mm hot rolled strip of austenite stainless steel 06Cr18Ni5Mn7Cu3N is 70 t EAF-70 t bottom-blown GOR converter-LF-180 mm x 1240 mm slab CC-hot rolling process. The peeling defects with width ≤ 20 mm and depth ≤ 0.06 mm occur at distance about 30 mm from edge of pickled 2.5 mm hot-rolled strip. Analysis show that due to higher heating temperature during heating process for hot rolling (1200-1260 ℃) and longer holding time during heating ( more than 210 min) led to the formation of a large amount of copper-rich phase precipitated at grain boundary, as a result the peeling defect forms during hot rolling. With improving healing temperature 1200-1240 ℃ and holding time 150-210 min, the forming strip peeling defect ratio decreases from original 7% to less than 0.5% , the quality of products enhances markedly.

Key words: Austenite Stainless Steel 06Cr18Ni5Mn7Cu3N, Strip, Peeling Defect, Heating Temperature, Heating Time

摘要： 2.5 mm热轧06Cr18Ni5Mn7Cu3N奥氏体不锈钢带的生产流程为70 t EAF-70 t底吹GOR转炉-LF-180 mm ×1240 mm板坯CC-热轧工艺。酸洗后2.5 mm热轧带距边部约30 mm处出现宽度≤20 mm,深≤0.06 mm的脱皮缺陷。分析表明,由于在热轧加热过程中加热温度过高(1200~1260℃),以及加热时间过长(超过210 min)使得富铜相在晶界处大量析出致使在热轧过程形成脱皮缺陷。通过将加热温度调整为1200~1240℃,加热时间为150~210 min后,产生脱皮缺陷的带材由7%降至0.5%以下,产品质量得到了显著的提升。

关键词: 奥氏体不锈钢06Cr18Ni5Mn7Cu3N, 带材, 脱皮缺陷, 加热温度, 加热时间