65钢热轧盘条脱碳分析与控制  

Analysis and Control of Decarburization in Hot Rolled Wire Rods of 65 Steel

作　　者：王磊 WANG Lei(Special Steel Business Unit,NISCO,Nanjing 210035,Jiangsu,China)

机构地区：[1]南京钢铁股份有限公司特钢事业部,江苏南京210035

出　　处：《热处理技术与装备》2024年第4期23-25,30,共4页Heat Treatment Technology and Equipment

摘　　要：基于JMatPro软件计算65钢的相变点Ac_(1)、Ac_(3)及其奥氏体化温度,研究铸坯脱碳、加热工艺和控轧控冷工艺对热轧盘条的影响,通过测定铸坯脱碳层深度并绘制连续冷却转变曲线(CCT),确定最优工艺参数。结果表明,65钢坯修磨深度应控制在1 mm以内,加热温度应控制在950~1050℃,除鳞压力应控制在18 MPa以上,终轧温度应控制在800~830℃,吐丝温度应控制在800~850℃,风冷线辊道速度应控制在0.7~0.8 m/s,经轧制后∅5.5 mm成品盘条未见全脱碳,且总脱碳层深度为0.03 mm,满足产品的脱碳要求(总脱碳≤0.044 mm)。Based on JMatPro software,the phase transition points Ac_(1),Ac_(3)and austenitizing temperatures of 65 steel were calculated,the influence of billet decarburization,heating process,and controlled rolling and cooling process on hot-rolled wire rods was studied,and the optimum processing parameters was confirmed by measuring the depth of billet decarburization layer and plotting the continuous cooling transformation curve(CCT).The results showed that the grinding depth of 65 steel billets should be controlled within 1 mm,the heating temperature should be controlled between 950 and 1050℃,the descaling pressure should be controlled above 18 MPa,the final rolling temperature should be controlled between 800 and 830℃,the wire drawing temperature should be controlled from 800 to 850℃,and the roller speed of the air-cooled line should be controlled between 0.7 and 0.8 m/s.After rolling,the∅5.5 mm finished wire rod had no complete decarburization and the total decarburization depth was 0.03 mm,which could meet the decarburization requirements of the product(total decarburization≤0.044 mm).

关 键 词：65钢 脱碳 加热 控轧控冷 

分 类 号：TG156.1[金属学及工艺—热处理]