服役态及时效态Super304H耐热钢结构损伤及力学性能衰减的对比研究

doi:10.3969/j.issn.1000-7229.2013.09.021

电力建设 ›› 2013, Vol. 34 ›› Issue (9): 105-111.doi: 10.3969/j.issn.1000-7229.2013.09.021

服役态及时效态Super304H耐热钢结构损伤及力学性能衰减的对比研究

陈国宏1，白小龙2，刘俊建1，王家庆1，汤文明2

1.安徽省电力科学研究院，合肥市 230601；2.合肥工业大学材料科学与工程学院，合肥市 230009

出版日期:2013-09-01
作者简介:陈国宏(1968)，男，硕士，高级工程师，主要研究方向是电站金属材料监督；白小龙(1989)，男，硕士，主要研究方向是电站金属材料运行状态评估；刘俊健(1985)，男，硕士，主要研究方向是电站金属材料监督；王家庆(1984)，男，硕士，主要研究方向是电站金属材料监督；汤文明(1969)，男，教授，主要研究方向是新材料合成制备及评价，E-mail：wmtang69@126.com。
基金资助:
安徽省电力科学研究院科技发展基金(［2011］QTXM1336)。

Comparative Study on Structural Damage and Mechanical Properties Degradation of Serviced and Aging Super304H Heat-Resistant Steel

CHEN Guohong1, BAI Xiaolong2, LIU Junjian1, WANG Jiaqing1, TANG Wenming2

1. Anhui Electric Power Research Institute, Hefei 230601, China；2.School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China

Online:2013-09-01

摘要/Abstract

摘要：

为探究Super304H钢在高温条件下的结构损伤和力学性能，以超超临界机组中在温度863 K下服役20 000 h的Super304H再热器管材及与其具有相同P函数值、在温度923 K下时效1 100 h的Super304H管材为对象，研究长期服役态Super304H再热器管材组织结构的老化，并开展相同P函数下的时效态与服役态Super304H钢管显微组织老化及力学性能衰减的对比研究。结果表明：钢管内、外壁运行条件的不同导致其显微组织结构产生差异；服役态钢管内侧的显微组织结构、力学性能与具有相同P函数的时效态Super304H钢管相似；然而，服役态钢管外侧的结构损伤比时效态更严重。因此，建立在Larson-Miller参数基础上的人工时效方法，只能在特定条件下模拟服役态钢管的结构损伤。

关键词: Super304H耐热钢, 等温时效, Larson-Miller参数, 结构损伤, 力学性能

Abstract:

In order to study the structural damage and mechanical property of Super304H steel in high temperature condition, two kinds of the Super304H heat-resistant steel were taken as research object: one was serviced at 863 K for 20 000 h as the reheater in an ultra-supercritical unit and the other was aged at 923 K for 1 100 h with the same P function value. The structure aging of the Super304H reheater was investigated after running for a long term, and the microstructure aging and mechanical properties degradation were studied on serviced and aging super304H steel tubes with same P function value. The results show that microstructures of the inner/outer side of the steel tube are heterogeneous due to their different running environments. The microstructure and mechanical properties of the inner side of the serviced Super304H steel tube are approximately equal to those of the aging super304H steel tube with the same P function value, however, the structural damage of the outer side of the serviced steel tube is more severe than that of aging one. Therefore, the artificial aging method in lab is conditionally accepted to simulate the structural damage of serviced steel tube, based on Larson-Miller parameter.

Key words: Super304H heat-resistant steel, isothermal aging, Larson-Miller parameter (LMP), structural damage, mechanical property

陈国宏，白小龙，刘俊建，王家庆，汤文明. 服役态及时效态Super304H耐热钢结构损伤及力学性能衰减的对比研究[J]. 电力建设, 2013, 34(9): 105-111.

CHEN Guohong, BAI Xiaolong, LIU Junjian, WANG Jiaqing, TANG Wenming. Comparative Study on Structural Damage and Mechanical Properties Degradation of Serviced and Aging Super304H Heat-Resistant Steel[J]. ELECTRIC POWER CONSTRUCTION, 2013, 34(9): 105-111.

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服役态及时效态Super304H耐热钢结构损伤及力学性能衰减的对比研究

Comparative Study on Structural Damage and Mechanical Properties Degradation of Serviced and Aging Super304H Heat-Resistant Steel

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