模拟CSP试制0.42%Cu Hi-B钢初次再结晶退火工艺试验

试验0.42%Cu Hi—B钢(/%:0.10C,3.25Si,0.16Mn,0.019P,0.011S,0.021Als,0.42Cu)由实验室感应炉熔炼,浇铸成15 kg锭,开坯成60 mm方坯,再经5道次热轧成3.95 mm板;试样为经压下率88%的0.48 mm冷轧板。冷轧板经830、850、870℃,3、5、7 min退火。对退火后的样品进行组织检验以及织构分析。实验结果表明,850℃5 min退火时,样品平均晶粒尺寸为14.49μm,偏差角为15°时,{111}＜112＞、{111}＜110＞等有利织构含量较多,而{001}＜110＞、{110}＜112＞等不利织构含量较少。850℃ 5 min退火为本实验冷轧板的最佳初次再结晶退火工艺。

Experiment on Primary Recrystallization Annealing Process of 0.42 % Cu Hi-B Steel Manufactured by Simulated CSP Flowsheet

The test 0.42% Cu Hi-B steel (/% : 0.10C, 3.25Si, 0.16Mn, 0.019P, 0.011S, 0.021 Als, 0.42Cu ) is melted by induction furnace at laboratory and cast to 15 kg ingot, broken down to 60 mm billet then hot-rolled to 3.95 mm plate. The tested specimen is 0.48 mm sheet cold-rolled by 88% reduction and annealed at 830 °C, 850 °C and 870 °C for 3 min, 5 min and 7 min. The metallographic examination and texture analysis of annealed specimens are carried out. The test results show that the average grain size of specimen annealed at 850 °C for 5 min is 14.49 μm, with deviation angle 15° the content of {111}＜112＞、{111}＜110＞ etc favourable textures is more, while the content of {001}＜110＞、{110}＜112＞ etc unfavourable textures is less. The optimized primary recrystallization annealed process of the test cold-rolled sheet is at 850 °C for 5 min.