2种热处理工艺对N07718镍基合金力学及耐蚀性能的影响

李良庆, 程文佳, 仲崇迪, 石胜凯, 林学强

doi:10.16577/j.issn.1001-1560.2024.0024

材料保护 >

2024 , Vol. 57 >Issue 1: 188 - 195

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0024

实用篇

2种热处理工艺对N07718镍基合金力学及耐蚀性能的影响

展开

¹中海油田服务股份有限公司天津分公司； ²中国石油大学(华东)材料科学与工程学院

林学强(1983-)，博士，高级实验师，主要从事油气田环境的腐蚀与防护研究，E-mail:linxueqiang＠upc.edu.cn

收稿日期: 2023-05-06

修回日期: 2023-06-30

录用日期: 2023-07-10

网络出版日期: 2024-01-30

基金资助

中国海油石油集团有限公司-关键技术攻关项目(CNOOC-KJ GJHXJSGG YF 2020-01)；国家自然科学基金青年基金项目(51701240)；中国石油大学(华东)校自主创新项目(17CX02023A)

收起

Effects of Two Heat Treatment Processes on Mechanical Properties and Corrosion Resistance of N07718 Nickel-Based Alloy

Expand

(1.Tianjin Company，China Oilfield Services Limited，Tianjin 300451，China；2.School of Materials Science and Engineering，China University of Petroleum (East China)，Qingdao 266580，China)

LIN Xueqiang(1983-)，Ph.D.，Expert Experimenter，Research Focus: Corrosion and Protection of Oil and Gas Fields，E-mail: linxueqiang＠upc.edu.cn

Received date: 2023-05-06

Revised date: 2023-06-30

Accepted date: 2023-07-10

Online published: 2024-01-30

Supported by

Key Core Technology Research Projects of CNOOC(CNOOC-KJ GJHXJSGG YF 2020-01)，Youth Fund of the National Natural Science Foundation of China(51701240)，Independent Innovation Project of China University of Petroleum (East China)(17CX02023A)

Fold

摘要

为探明不同热处理工艺对镍基合金力学及耐蚀性能的影响，利用万能拉伸试验机、摆锤冲击试验机对2 种不同固溶时效保温时间的N07718 材料进行了拉伸、低温冲击等力学性能对比测试，同时利用高温高压H2S/CO2腐蚀电化学试验装置对2 种热处理工艺的材料进行高温高压电化学测试。结果表明，固溶保温时间对N07718材料的韧塑性影响较大，对耐蚀性影响较小。利用热场发射扫描电镜(SEM)、X 射线能谱仪(EDS)等对比分析了2种N07718 材料韧塑性差异的原因。研究发现固溶时效保温时间的延长使N07718 合金材料晶界位置析出大量棒状δ 相，且部分连接成串，导致材料塑韧性降低。针对N07718 镍基合金推荐使用1 029.4 ℃固溶保温1.5 h 后水冷+779.4 ℃保温时效6.5 h，空冷的热处理工艺，其综合性能更优。

关键词： N07718; δ 析出相; 韧塑性; 耐蚀性; 热处理工艺

本文引用格式

李良庆, 程文佳, 仲崇迪, 石胜凯, 林学强 . 2种热处理工艺对N07718镍基合金力学及耐蚀性能的影响[J]. 材料保护, 2024 , 57(1) : 188 -195 . DOI: 10.16577/j.issn.1001-1560.2024.0024

Abstract

To investigate the effects of different heat treatment processes on the mechanical properties and corrosion resistance of nickel-based alloys，comparative tests of mechanical properties such as tension and low-temperature impact of N07718 materials with two kinds of different solid solution aging holding times were conducted using a universal tensile testing machine and a pendulum impact testing machine.At the same time，high-temperature and high-pressure H2 S/CO2 corrosion electrochemical testing equipment was used to conduct high-temperature and high-pressure electrochemical testing on the materials after two kinds of heat treatment processes.The results showed that the solid solution holding time greatly influenced the toughness and plasticity of the N07718 material but had a minor effect on its corrosion resistance.The reasons for the differences in toughness and plasticity between the two N07718 materials were analyzed through thermal field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS).An increase in solid solution aging holding time led to the precipitation of a large number of rod-shaped δ phases at the grain boundaries of the N07718 alloy material，some of which connected into chains，resulting in a decrease in material toughness and plasticity.For the N07718 nickel-based alloy，a heat treatment process involving solid solution holding treatment at 1 029.4 ℃for 1.5 h followed by water cooling，plus holding and aging treatment at 779.4 ℃for 6.5 h and air cooling，was recommended for optimal comprehensive performance.

Key words： N07718; δ precipitate phase; toughness and plasticity; corrosion resistance; heat treatment process

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract