大口径热煨弯管外观缺陷及原因分析  

Appearance Defect and Cause Analysis of Large Diameter Hot Bending Pipe

作　　者：王冬林 刘迟 张琦[3] 刘月发 赵晗君 WANG Donglin;LIU Chi;ZHANG Qi;LIU Yuefa;ZHAO Hanjun(CNPC Tubular Goods Research Institute,Xi'an 710077,China;Beijing Longsheng Tyco Petroleum Pipe Technology Company,Beijing 100101,China;China Petroleum Technology Development Co.,Ltd.,Beijing 100028,China)

机构地区：[1]中国石油集团石油管工程技术研究院,陕西西安710077 [2]北京隆盛泰科石油管科技有限公司,北京100101 [3]中国石油技术开发有限公司,北京100028

出　　处：《热加工工艺》2023年第15期149-151,157,共4页Hot Working Technology

基　　金：国家重点研发计划项目(2018YFF0215003)。

摘　　要：研究大口径热煨弯管外观缺陷并进行原因分析,对弯管质量控制极其重要。本文主要从钢板结疤、钢板表面夹杂、钢板划伤和搓伤、钢板折叠、钢板麻点及麻坑、直缝钢管焊缝缺陷方面对原材料热加工缺陷进行了原因分析;并从弯管热煨过程内弧侧形成波浪、外弧侧出现的裂纹或断裂,弯管热处理过程管端或圆弧段出现塌陷等方面对弯管热加工缺陷进行了原因分析。It is very important to study the appearance defects and cause analysis of large diameter hot bending pipe for elbow quality control.The thermal processing defects of raw materials were mainly analyzed from the aspects of steel plate scab,steel plate surface inclusion,steel plate scratch and rub,steel plate folding,steel plate pockmarks and pockmarks,straight seam steel pipe weld defects.The causes of hot processing defects of the bending pipe were analyzed from the aspects of wave form on the arc side of the elbow,and cracks or fracture on the outer arc side during the hot bending process,and collapse of the pipe end or arc section during the heat treatment process of elbow pipe.

关 键 词：大口径 热煨弯管 热加工 外观缺陷 原因分析 

分 类 号：TG316.1*92[金属学及工艺—金属压力加工]