| 紫铜管与低碳钢管焊接件开裂分析 |
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| 引用本文： | 尚延伟,赵梅春,陈伟锋,陈林君.紫铜管与低碳钢管焊接件开裂分析[J].理化检验(物理分册),2010(6):385-387. |
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| 作者姓名： | 尚延伟 赵梅春 陈伟锋 陈林君 |
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| 作者单位： | [1]绍兴市制冷配件检测中心,绍兴312500 [2]青岛市开拓隆海制冷配件有限公司,青岛266109 |
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| 摘 要： | 某紫铜管与低碳钢管焊接件焊接后在焊接接头靠近紫铜管侧出现了大量开裂现象,通过对开裂部位紫铜管部分进行宏观分析、化学成分分析、扫描电镜断口观察及金相检验,对焊接件的开裂原因进行了分析。结果表明:紫铜管原材料中氧含量超标以及焊接温度过高共同引起晶界弱化,致使在焊接接头处叠加了较大的组织应力和热应力,当叠加应力大于材料的承受能力时就会引起晶界破裂,导致焊接件开裂。最后在分析的基础上提出了改进措施。
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| 关 键 词： | 紫铜管与低碳钢管焊接件 开裂 氧含量 晶界弱化 |
Cracking Analysis on Welding Parts of Copper Pipe and Low Carbon Steel Pipe |
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| SHANG Yan-wei,ZHAO Mei-chun,CHEN Wei-feng,CHEN Lin-jun.Cracking Analysis on Welding Parts of Copper Pipe and Low Carbon Steel Pipe[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2010(6):385-387. |
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| Authors: | SHANG Yan-wei ZHAO Mei-chun CHEN Wei-feng CHEN Lin-jun |
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| Affiliation: | 1. Testing Center for Refrigeration Fitting of Shaoxing, Shaoxing 312500, China; 2. Qingdao Kaituolonghai Air Conditioning Parts Co. , Ltd. , Qingdao 266109, China) |
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| Abstract: | A large quantity of cracking appeared in the welding parts of copper pipe and low carbon steel pipe. The cracking reasons were analyzed by means of macro examinaton on the cracking position, chemical compositions analysis, fracture observition by SEM and microstructure inspection. The results show that the comprehensive effect, which was induced the oxygen content in the material was over standard and grain boundary weakness by long time welding, made that the structural stress and thermal stress existed in the joint. The grain boundary cracked when the stress exceeded the limit of the material. The improved measures were also brought forward on the basis of analysis. |
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| Keywords: | welding part of copper pipe and low corbon steel pipe cracking oxygen content grain boundary weakness |
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