[1]卢华涛,田志宾,杨海涛,等.17-4PH推靠器螺钉断裂失效机理研究[J].常州大学学报(自然科学版),2022,34(03):1-6.[doi:10.3969/j.issn.2095-0411.2022.03.001]
　LU Huatao,TIAN Zhibin,YANG Haitao,et al.Study on Fracture Failure Mechanism of 17-4PH Propeller[J].Journal of Changzhou University(Natural Science Edition),2022,34(03):1-6.[doi:10.3969/j.issn.2095-0411.2022.03.001]
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17-4PH推靠器螺钉断裂失效机理研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第34卷
期数:
2022年03期
页码:
1-6
栏目:
特约稿
出版日期:
2022-05-28

文章信息/Info

Title:
Study on Fracture Failure Mechanism of 17-4PH Propeller
文章编号:
2095-0411(2022)03-0001-06
作者:
卢华涛1; 田志宾1; 杨海涛1; 王海朋2; 杨中娜2; 徐志刚2; 杨阳2
(1.中海油田服务股份有限公司,河北廊坊065000;2.中海油(天津)管道工程技术有限公司,天津300452)
Author(s):
LU Huatao1;  TIAN Zhibin1;  YANG Haitao1;  WANG Haipeng2;  YANG Zhongna2;  XU Zhigang2;  YANG Yang2
(1.China Oilfield Services Limited, Langfang 065000, China; 2. CNOOC(Tianjin)Pipeline Engineering Technology Co., Ltd., Tianjin 300452, China)
关键词:
17-4PH;  螺钉;  失效分析;  疲劳断裂
Keywords:
17-4PH;  screw;  failure analysis;  fatigue fracture
分类号:
TG 142.1
DOI:
10.3969/j.issn.2095-0411.2022.03.001
文献标志码:
A
摘要:
17-4PH材质的推靠器采用同样材质的内沉头六方孔螺钉进行紧固连接,螺钉主要承受剪切力。在测井作业中,螺钉发生断裂。文章从断口微观与宏观形貌、硬度、金相、夹杂物、微区能谱、化学成分、人为断口形貌等方面,分析螺钉失效机理。试验测试结果发现,螺钉材质化学成分合格,硬度值低于标准要求下限,基体存在夹杂物,金相组织为马氏体+带状高温铁素体,铁素体的存在破坏基体连续性,造成硬度与力学性能下降,宏观断口与微观断口形貌有明显的疲劳断裂特征,据此推断螺钉失效机理为剪切应力造成的疲劳断裂。
Abstract:
The 17-4PH eccentering ailll is fastened with the inner countersunk head hexagonal hole screw(17-4PH), which mainly bears shear force. During logging operation, the screw broke. In this paper, the failure analysis of the broken focuses on aspects of micro and macro morphology, hardness, metallography, inclusions, micro energy spectrum, chemical composition and artificial fracture morphology. According to the test results, the chemical composition of the screw material is qualified, while its hardness value is lower than the lower limit of the standard requirements, and there exist inclusions in the matrix. The metallographic structure is martensite and high-temperature ferrite, and the existence of ferrite destroys the continuity of the matrix. As a result, the hardness and mechanical properties decline. The fatigue fracture characteristics in the micrograph shows that the failure mechanism of the screw is fatigue fracture caused by shear stress.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2021-11-25。
作者简介: 卢华涛(1981—), 男, 湖北应城人, 硕士, 教授。通信联系人: 杨中娜(1985—), E-mail:yangzhn@cnooc.com.cn
更新日期/Last Update: 1900-01-01