焊接方法对X90管道环焊接头断裂韧性的影响
TG441.3%TE973; 为准确获取X90环焊接头的断裂韧性,采用改进的规则化法对X90环焊接头的低约束单边缺口拉伸试件进行断裂韧性测试,分别从手工焊、自保护药芯半自动焊和气保护药芯半自动焊焊接的X90管道环焊接头中提取测试试件,进行断裂韧性试验.结果表明,相同焊接方法下,浅裂纹试件所得阻力曲线比深裂纹试件所得阻力曲线低;热影响区的深裂纹试件具有最高的裂纹扩展阻力曲线,而热影响区的浅裂纹试件具有最低的裂纹扩展阻力曲线;焊缝区试件在试验中极易发生脆断,具有相对较差的断裂性能,并且受焊接方法影响较大,其中气保护药芯焊丝半自动焊的焊缝区试件全部发生脆断.因此,气保护药芯焊丝半自动焊在实际X90管...
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| Published in | 焊接学报 Vol. 45; no. 3; pp. 32 - 42 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国石油大学, 北京, 102249
01.03.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-360X |
| DOI | 10.12073/j.hjxb.20230406001 |
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| Abstract | TG441.3%TE973; 为准确获取X90环焊接头的断裂韧性,采用改进的规则化法对X90环焊接头的低约束单边缺口拉伸试件进行断裂韧性测试,分别从手工焊、自保护药芯半自动焊和气保护药芯半自动焊焊接的X90管道环焊接头中提取测试试件,进行断裂韧性试验.结果表明,相同焊接方法下,浅裂纹试件所得阻力曲线比深裂纹试件所得阻力曲线低;热影响区的深裂纹试件具有最高的裂纹扩展阻力曲线,而热影响区的浅裂纹试件具有最低的裂纹扩展阻力曲线;焊缝区试件在试验中极易发生脆断,具有相对较差的断裂性能,并且受焊接方法影响较大,其中气保护药芯焊丝半自动焊的焊缝区试件全部发生脆断.因此,气保护药芯焊丝半自动焊在实际X90管道工程应用中作为参考方法需要优化,这对保持X90管道结构的完整性至关重要. |
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| AbstractList | TG441.3%TE973; 为准确获取X90环焊接头的断裂韧性,采用改进的规则化法对X90环焊接头的低约束单边缺口拉伸试件进行断裂韧性测试,分别从手工焊、自保护药芯半自动焊和气保护药芯半自动焊焊接的X90管道环焊接头中提取测试试件,进行断裂韧性试验.结果表明,相同焊接方法下,浅裂纹试件所得阻力曲线比深裂纹试件所得阻力曲线低;热影响区的深裂纹试件具有最高的裂纹扩展阻力曲线,而热影响区的浅裂纹试件具有最低的裂纹扩展阻力曲线;焊缝区试件在试验中极易发生脆断,具有相对较差的断裂性能,并且受焊接方法影响较大,其中气保护药芯焊丝半自动焊的焊缝区试件全部发生脆断.因此,气保护药芯焊丝半自动焊在实际X90管道工程应用中作为参考方法需要优化,这对保持X90管道结构的完整性至关重要. |
| Abstract_FL | With the continuous increase in energy demand in China,the research and development of new generation high-grade pipeline materials has become a hot topic.And X90 pipelines have gradually become the focus of research.However,they have not yet been officially put into use.In the actual construction of oil and gas pipelines,the girth welded joint of the pipeline is a weak link.The welding quality is cru-cial to ensure the safety of long-distance oil and gas pipelines,and the welding method plays a decisive role in the welding quality of the pipeline.Therefore,it is necessary to study the effect of welding method on the fracture toughness of X90 pipeline girth welded joints and clarify the fracture perform-ance of X90 pipeline girth weld joints.This provides theoretic-al guidance for the formal use of the X90 pipeline in practical engineering,and also provides technical support for the weld-ing assessment of the X90 pipeline.In order to accurately ob-tain the fracture toughness of X90 girth welded joints,an im-proved regularization method was used to test the SENT speci-mens of X90 girth weld joints for fracture toughness.To accur-ately obtain the fracture toughness of the X90 circumferential welded joint,an improved regularization method was used to test the SENT specimen of the X90 circumferential welded joint for fracture toughness.Test specimens were extracted from X90 pipeline circumferential welded joints welded by manual welding,self-shielded flux-cored semi-automatic weld-ing,and gas-shielded flux-cored semi-automatic welding,re-spectively,and fracture toughness tests were conducted.The results showed that the resistance curve obtained from the spe-cimens with shallow cracks is lower than that obtained from the specimens with deep cracks under the same welding method.The specimens with deep cracks in the heat-affected zone have the highest resistance curve,while the specimens with shallow cracks in the heat-affected zone have the lowest resistance curve.The weld zone specimens were prone to brittle fracture during the test and had relatively poor fracture performance.Furthermore,they were greatly influenced by the welding method,with all of the weld zone specimens welded with gas-shielded flux-cored semi-automatic welding experiencing brittle fracture.Therefore,gas-shielded flux-cored wire semi-automatic welding needs to be optimized as a reference meth-od in practical X90 pipeline engineering applications,which is crucial for maintaining the integrity of the X90 pipeline struc-ture. |
| Author | 任伟 帅健 |
| AuthorAffiliation | 中国石油大学, 北京, 102249 |
| AuthorAffiliation_xml | – name: 中国石油大学, 北京, 102249 |
| Author_FL | REN Wei SHUAI Jian |
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| Author_xml | – sequence: 1 fullname: 任伟 – sequence: 2 fullname: 帅健 |
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| ClassificationCodes | TG441.3%TE973 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| Keywords | 环焊接头 阻力曲线 the girth weld 焊接方法 fracture toughness R curve 断裂韧性 welding method low con-straint specimens 低约束试件 |
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| Title | 焊接方法对X90管道环焊接头断裂韧性的影响 |
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