1500M3液化石油气球罐残余应力分析.pdf

第3卷第6財
石洲化
设各
ol.33 No6
2004年11月
PE TRO-CHEMICAL, EOUIPMENT
Nov.2004
文章编号:1000-7466(2004)06-0004
1500m3液化石油气球罐残余应力分析
张亦良,徐学东,工泽车2
1.北京に业大学,北京10002.大津锅炉压力容器技术检验所,大津300192)
摘要:1台1500m3的16MnR液化行油气球罐,建造时经过整体热处理,运行4a后在检修中发现大
量裂纹。用X射线法对该球罐进行了系统的残余应力测试,分析了人量裂纹与残余应力水的关
系。村出堄袈纹最多的区域利未见裂纹的区域分別进行考察,结果表明,焊缝附近残余应力总体水
较高,内壁赤道带焊缝处残余应力高达0.72、,显示当初的热处理效某不理想。球罐人修补焊及
憋圈热处理后在相同位置重新进行测试,结果表明,残余应力大幅度降低,整体ド降约50%,热处
理效果良好。同时解决了x射线应力仪现场垂直方向测试的投术问题。
关键词:球罐;残余应力:X射线法;裂纹;热处理
中图分类号:TG404:TE972
文献标识码:A
Residual stress analysis of a 1 500 m liquefied petroleum gas spherical vessel
ZHANG Yi-liang, XU Xue-dong, WANG e-jun
(1. Beijing University of Technology, Beijing 100022, China
2. Tianjin Boiler Pressure Vessel Inspection Institute, Tianjin 300192, China
Abstract: A large number of cracks are found in the 1 500 m'liquefied petroleum gas spherical vessel during the inspection after
four years of runnin. The vessel ein fully eat-treated is made of 16M. Then the relationships between the numerous cracks
and residual stress should e analyzed by testing the vessel systematically with X-RAY method. The test results show that the inte
gral level of its residual stress is much higher in the areas near the welding line after detecting the area with most cracks and with
out cracks, and the residual stress of original state zone of inner surface has been up to 0. 72s, which proves the effeet of the heat
treatment is not good enough. The secondary residual stress test of the same testing points at work site alter the integral heat treat
ment of large ring weld bead is performed. The residual stress decreases obviously and comes down about 50% totally, which
shows the effects of the second heat treatment is god. Meanwhile, the measurement to the stress in the vertical direction with X-
Ray is finished after a set of special treatments in the outfield
Key words spherical vessel; residual stress; X-ray diffraction; crack heat treatment
天津泰达公可1?1500m3液化石油气球罐材
第1次测试是在对球罐做了局部修复后进行
料为16MnR,壁厚42m,该球罐经过整体热处理后的,分别考察了裂纹最多的人环焊缝区域,、下极
于1998年正式投入运行。1999年开罐检査时,发现板区域以及进行补焊和局部热处理后的修补状态区
内壁人环焊缝下部有少量裂纹,当时只进行了打磨域。结果表明,残余应力整体水平较高,内壁原始状
处理。2002年第2次开罐检査肘发现内、外壁的大念区成力达到0.72o、,说明球罐建造肘的热处理效
环焊缝处有数百条裂纹,多数为细小裂纹。为分析某不理想。在进行了补焊及局部热处理的部位,戏
大量裂纹出现的原因,北京工业大学用X射线法在余应力接近或者込到州服应力,说明局部热处理没
现场对球罐进行了较详细的残余应力测试分析。
有起到作川
收稿日期:2004-05-28
作者简介:张亦良(1955-),女(汉族),北京人,教授,主要从邦疲劳断裂力学、结构残余应力、动静态应变、材料应力腐使、
磁记忆检测及失效分析等研究。