1800 MPa超高强钢变径管热气胀成形特性研究  

Hot Metal Gas Forming Characteristics of 1800 MPa UHSS Variable Diameter Tube

作　　者：程超 韩非[1,2] 石磊 CHENG Chao;HAN Fei;SHI Lei(Research Institute(R&D Center),Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China;State Key Laboratory of Development and Application Technology of Automotive Steels(BAOSTEEL),Shanghai 201999,China)

机构地区：[1]宝山钢铁股份有限公司中央研究院,上海201999 [2]汽车用钢开发与应用技术国家重点实验室(宝钢),上海201999

出　　处：《精密成形工程》2023年第12期34-41,共8页Journal of Netshape Forming Engineering

摘　　要：目的对B1800HS热成形钢进行管件热气胀成形研究,探究变径管特征件热气胀成形的可行性和规律,为进一步研究热气胀成形超高强钢管件及工程应用推广提供参考和支撑。方法采用ABAQUS有限元仿真分析和试验对比,研究了1800 MPa超高强钢变径管热气胀成形特性,通过有限元分析研究了成形温度(700、800、900℃)、气压加载速率(1、3、5 MPa/s)及胀形压力(12、15、18 MPa)对变径管成形规律的影响,通过变径管热气胀成形试验,研究了敏感参数对变径管样件尺寸精度、强度分布及厚度变化的影响。结果提高成形温度、气压加载速率和胀形压力可明显提高变径管的成形质量和贴模精度,当成形温度为900℃时,变径管抗拉强度可达到1800 MPa级别,且增压速率和胀形压力影响较小;变径管沿环向厚度分布均匀,零件无明显增厚和过度减薄缺陷。结论通过热气胀工艺成形1800 MPa级别变径管是可行的,通过优化工艺参数,可有效提高零件的成形精度和强度,为典型超高强钢管件热气胀成形的开发提供了依据和参考。The work aims to study the hot metal gas forming(HMGF)of B1800HS tube and explore the feasibility and laws of HMGF of characteristic variable diameter tube parts,so as to provide reference and support for further research on HMGF of ultra-high strength steel tube and the promotion of applications in engineering.ABAQUS finite element simulation analysis and experimental comparison were adopted to study the HMGF characteristics of 1800 MPa ultra-high strength steel variable di-ameter tube.Through finite element analysis,the effects of temperature(700,800,900℃),pressurization rate(1,3,5 MPa/s),and bulging pressure(12,15,18 MPa)on the forming law of variable diameter tube were studied.The effect of sensitive pa-rameters on the size accuracy,strength distribution and thickness change of variable diameter tube sample was studied.Increas-ing the forming temperature,pressurization rate and bulging pressure could improve the clamping accuracy and tensile strength of variable diameter tube.At a forming temperature of 900℃,the tensile strength of the variable diameter tube could reach the level of 1800 MPa,and the effect of the pressurization rate and bulging pressure was relatively small.The variable diameter tube was evenly distributed along the circumferential thickness,and the parts were free of obvious thickening and excessive thinning defects.The application of HMGF to 1800 MPa variable diameter tube is feasible.By optimizing process parameters,the forming accuracy and strength of parts can be effectively improved,which provides basis and reference for the HMGF de-velopment of typical ultra-high strength steel tubes.

关 键 词：热气胀 1800 MPa超高强钢 变径管 成形特性 气压 

分 类 号：TG394[金属学及工艺—金属压力加工]