皮尔格热轧工艺参数对06Cr19Ni10/Q235双金属复合管结合层及椭圆度的影响  

Effect of Pilger hot-rolling process parameters on bonding layer and ovality of 06Cr19Ni10/Q235 bimetal composite pipe

作　　者：何宗霖[1] 陈建勋 双远华[1] 苟毓俊 丁小凤 桂海莲[1] 黄晰萌 He Zonglin;Chen Jianxun;Shuang Yuanhua;Gou Yujun;Ding Xiaofeng;Gui Hailian;Huang Ximeng(College of Material Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;College of Vehicle Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Gangheli New Material Technology Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原科技大学交通学院,山西太原030024 [3]山西钢合力新材料科技有限公司,山西太原030024

出　　处：《锻压技术》2023年第6期96-101,共6页Forging & Stamping Technology

基　　金：山西省科技重大专项(20191102009);山西省重点研发计划项目(201903D121049);太原科技大学博士科研启动金项目(20222045);太原科技大学大学生创新训练项目(XJ2022024)。

摘　　要：为了提高皮尔格热轧双金属复合管的质量,提出了临界理论。针对送进量和回转角等工艺参数,对06Cr19Ni10/Q235双金属复合管皮尔格热轧工艺进行了数值模拟和实验研究,探究了送进量和回转角对双金属复合管结合层及椭圆度的影响,验证了临界理论的可靠性。结果表明:较小的回转角会使双金属复合管结合层处受力均匀,且结合层处所受应力更大。当回转角与送进量的比值接近临界值20°·mm^(-1)时,双金属复合管结合层夹杂物的最大尺寸小于8μm,椭圆度为1.2 mm,成形性较好;当低于临界值20°·mm^(-1)时,双金属复合管结合层夹杂物的最大尺寸小于6μm,椭圆度为1.1 mm,局部产生开裂;当高于临界值20°·mm^(-1)时,双金属复合管结合层夹杂物的最大尺寸达到25μm,椭圆度为11.8 mm,会发生开裂和凸耳现象。In order to improve the quality of bimetal composite pipes by Pilger hot-rolling,the critical theory was put forward.For the process parameters such as feeding amount and rotation angle,the numerical simulation and experimental research were carried out on the Pilger hot-rolling process of 06Cr19Ni10/Q235 bimetal composite pipe.Then,the influences of feeding amount and rotation angle on bonding layer and ovality of bimetal composite pipe were studied,and the reliability of the critical theory was verified.The results show that the smaller rotation angle makes the stress on the bonding layer of bimetal composite pipe uniform,and the stress on the bonding layer is greater.When the ratio of rotation angle to feeding amount is close to the critical value 20°·mm^(-1),the maximum size of inclusion in the bonding layer of bimetal composite pipe is less than 8μm,the ovality is 1.2 mm,and the formability is good.When the ratio is below the critical value 20°·mm^(-1),the maximum size of inclusions in the bonding layer of bimetal composite pipe is less than 6μm,the avality is 1.1 mm,and cracking occurs locally.When the ratio is higher than the critical value 20°·mm^(-1),the maximum size of inclusions in the bonding layer of bimetal composite pipe reaches 25μm,the avality is 11.8 mm,and cracking and earing occur at the same time.

关 键 词：皮尔格热轧 双金属复合管 送进量 回转角 椭圆度 结合层 

分 类 号：TG339[金属学及工艺—金属压力加工]