TP439钢带冷弯成型性能影响因素分析  

Analysis of Factors as Affecting Cold-forming Performance of TP439 Strip Steel

作　　者：刘明洲 方焰兵 吴俊洁 孙炎 张杰伟 LIU Mingzhou;FANG Yanbing;WU Junjie;SUN Yan;ZHANG Jiewei(Zhejiang Jiuli Special Material S&T Co.,Ltd.·Zhejiang Provincial Institute of Engineering Technology for Nuclear Power-Serviced High Performance Tube Formation,Huzhou 313028,China)

机构地区：[1]浙江久立特材科技股份有限公司·浙江省核电用高性能管材成形工程技术研究中心,浙江湖州313028

出　　处：《钢管》2024年第3期79-83,共5页Steel Pipe

摘　　要：使用两种相同厚度但不同制造工艺和成分的TP439钢带,采用相同的冷弯成型工艺生产同规格的产品,通过检测和分析金相组织、残余应力(C型法)、拉伸和硬度性能,发现影响TP439钢带冷弯成型性能的主要因素是化学成分和终轧温度。其中化学成分中C和N影响较大,主要影响钢带的硬度、强度和延伸率;终轧温度主要影响钢带晶粒度;低硬度、低屈服强度、高延伸率和细晶粒度有利于冷弯成型。通过对上述影响因素的分析研究,可为冷弯成型用TP439钢带的性能控制提供指导。Tow TP439 strip steels with same thickness,different chemical compositions and made with different manufacturing processes are used to produce the products with the same size via the same cold-bending formation process.The key factors as affecting the cold-bending forming performance of the TP439 strip steel,i.e.,the chemical composition and the finish-rolling temperature are identified by means of testing and analyzing the metallographic structure,the residual stress(via the C Type Method),the tensile property and the hardness,etc.Comparatively Elements C andN in the chemical composition produces more obvious influences mainly on the hardness,the strength and the elongation of the strip steel,while the finish-rolling temperature mainly affects the grain size;and the low hardness,the low yield strength,the high elongation and the fine grain size of the strip steel are helpful for cold-bending formation of the strip steel.The result of the above mentioned analyses is worth using as the guide for controlling the performance of the strip steel for cold-bending formation purpose.

关 键 词：冷弯成型 TP439 残余应力 终轧温度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]