Highly reliable heat resistant materials based on clarification of dynamic precipitation mechanism of harmful phase

基于有害相动态析出机理的高可靠性耐热材料

• 批准号: 22760547
• 负责人: SAWADA Kota
• 金额: $ 2.5万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760547/
• 关键词: 火力発電プラント; 配管; クリープ強度; 材質劣化; 有害析出相; 改良9Cr-1Mo鋼; 長時間クリープ; 長時間強度低下; Z相; MX炭窒化物; クリープ強度低下

It is necessary for pipes of thermal power plants to resist steam with high temperature and pressure for several tens of years. However, harmful precipitates form after operating of power plants for several years, leading to degradation of materials. Changes of number density and size of harmful precipitates during using of pipes were investigated. It was clear that the formation of harmful precipitates was pronounced after about six years. Applied stress due to the steam with high temperature and pressure promoted the formation of harmful precipitates.

火力发电厂的管道需要承受几十年的高温高压蒸汽。然而，发电厂运行数年后会形成有害的沉淀物，导致材料降解。研究了钢管在使用过程中有害析出物的数量密度和尺寸的变化。很明显，有害沉淀物的形成在大约六年后明显。高温高压蒸汽产生的应力促进了有害沉淀物的形成。

项目成果

T91鋼の低応力域における組織変化とクリープ強度低下

T91钢低应力区显微组织变化及蠕变强度降低

• 发表时间: 2010
• 作者: 澤田浩太;九島秀昭;田淵正明;木村一弘
• 通讯作者: 木村一弘

MICROSTRUCTURAL CHANGES OF T91 STEEL DURING CREEP UNDER LOW STRESS

T91钢低应力蠕变过程中的显微组织变化

• 发表时间: 2010
• 作者: 澤田浩太;九島秀昭;田淵正明;木村一弘
• 通讯作者: 木村一弘

Microstructural degradation of Gr.91 steel during creep under low stress

• DOI: 10.1016/j.msea.2011.03.073
• 发表时间: 2011-06-25
• 期刊: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
• 影响因子: 6.4
• 作者: Sawada, K.;Kushima, H.;Kimura, K.
• 通讯作者: Kimura, K.