P110H钢的高温拉伸性能及断裂机理

doi:10.13251/j.issn.0254-6051.2020.04.043

金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 204-208.DOI: 10.13251/j.issn.0254-6051.2020.04.043

P110H钢的高温拉伸性能及断裂机理

赵林¹, 杨军虎¹, 魏文澜², 马海¹, 薛洋¹, 马利娟¹

1. 河南油田石油工程技术研究院, 河南南阳 473132;
2. 西安石油大学机械工程学院, 陕西西安 710065

收稿日期:2019-09-28 出版日期:2020-04-25 发布日期:2020-05-08
通讯作者: 魏文澜,讲师,博士,E-mail:weiwenlannds@163.com
作者简介:赵林(1982—),男,副研究员,硕士研究生,主要从事油田开发技术研究,E-mail:zhaolin0469.hnyt@sinopec.com

High temperature tensile properties and fracture mechanism of P110H steel

Zhao Lin¹, Yang Junhu¹, Wei Wenlan², Ma Hai¹, Xue Yang¹, Ma Lijuan¹

1. Research Institute of Petroleum Engineering and Technology, Henan Oilfield, Nanyang Henan 473132, China;
2. Mechanical Engineering College, Xi'an Shiyou University, Xi'an Shaanxi 710065, China

Received:2019-09-28 Online:2020-04-25 Published:2020-05-08

摘要/Abstract

摘要： 根据热采井的服役温度,对P110H热采套管钢进行了高温拉伸试验,并对不同温度下的断口形貌进行了观察,分析了由于温度影响而引起的断裂机理变化。结果表明:随着温度的升高,P110H钢的屈服强度显著下降,而抗拉强度下降并不明显,屈强比随温度升高而降低。在高温的影响下,其断裂过程由微孔聚合诱发剪切扩展断裂的组合断裂过程转变为微孔聚合为主导的韧性断裂过程,其主要原因是由于高温使位错激活能增加,提高了材料的塑性变形能力。

关键词: 热采套管, P110H钢, 拉伸性能, 断口分析, 断裂机理

Abstract: Referring to the service temperature of thermal recovery wells, the tensile test of P110H thermal recovery casing steel at high temperature was carried out. Then the fracture morphology at different temperatures was observed, and the fracture mechanism changes caused by temperature were analyzed. The results show that the yield strength of P110H steel decreases significantly with temperature increasing, while the tensile strength decreases slightly, and the yield strength ratio decreases with temperature increasing. Under the influence of high temperature, the fracture process changes from the combined fracture process of shear extension fracture induced by microporous polymerization to the ductile fracture process dominated by microporous polymerization. The main reason is that the activation energy of materials increases the plastic deformation ability of materials due to high temperature.

Key words: thermal recovery casing, P110H steel, tensile properties, fracture analysis, fracture mechanism

中图分类号:

TG142.1

赵林, 杨军虎, 魏文澜, 马海, 薛洋, 马利娟. P110H钢的高温拉伸性能及断裂机理[J]. 金属热处理, 2020, 45(4): 204-208.

Zhao Lin, Yang Junhu, Wei Wenlan, Ma Hai, Xue Yang, Ma Lijuan. High temperature tensile properties and fracture mechanism of P110H steel[J]. Heat Treatment of Metals, 2020, 45(4): 204-208.

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P110H钢的高温拉伸性能及断裂机理

High temperature tensile properties and fracture mechanism of P110H steel

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