温成形对热轧Q345R钢制封头性能的影响  

Effect of warm-forming process on properties of head made of hot-rolled Q345R steel plate

作　　者：敬仕煜 何小明 王云林 尹锋 谢逍原 袁梦苓 JING Shiyu;HE Xiaoming;WANG Yunlin;YIN Feng;XIE Xiaoyuan;YUAN Mengling(Dongfang Electric Group Dongfang Boiler Co.,Ltd.,Laboratory of High Temperature and High Pressure Materials and Welding Engineering for Machinery Industry,Zigong 643001,China)

机构地区：[1]东方电气集团东方锅炉股份有限公司机械工业高温高压材料与焊接重点实验室,四川自贡643001

出　　处：《压力容器》2022年第6期1-6,共6页Pressure Vessel Technology

摘　　要：采用热轧Q345R钢板,在580,600℃温成形制造封头,解剖后进行成形态和615℃退火态力学性能试验,以研究温成形工艺与封头性能之间的关系,并探讨封头强度变化的原因。结果表明:温成形主要对热轧Q345R钢板的强度产生影响,对塑性和韧性的影响相对较小;成形态封头沿直径方向各位置的强度变化呈“碟”形,中间区域低,边缘直段高;615℃退火处理后,封头强度整体下降,分布呈浅“碟”形;温成形封头的最终强度是钢板基础强度、轧制强化、成形强化和退火软化共同作用的结果。To study the relationship between the warm forming process and properties of the head,mechanical properties tests were carried out on head samples warm-formed and annealed at 615℃respectively.The samples were cut from the typical positions of the head that is made of hot-rolled Q345R steel plate and worm formed at 580℃and 600℃.Furthermore,the causes for the change in head strength were discussed.The results show that the warm forming mainly affects the strength of the hot-rolled Q345R steel plate,and has a little influence on the plasticity and toughness.The strength change of the warm-formed head along the diameter direction appears“dish”shaped,that is,the strength is low in the middle area,and high in the edge straight section;The overall strength of the head after annealed at 615℃decreases,and its distribution appears shallow“dish”shaped.The final strength of the warm-formed head is the result of combined action of the basic strength of the steel plate,rolling strengthening,and forming strengthening and annealing softening.

关 键 词：封头 热轧Q345R钢板 温成形 性能 

分 类 号：TH136[机械工程—机械制造及自动化] TG335.5[金属学及工艺—金属压力加工] TG113.25