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JP2011032499A Heat-treatment method for regenerating part with deterioration in creep strength 审中-公开
标题翻译：热处理方法用于再生一部分，具有检测强度
公开(公告)号：JP2011032499A
公开(公告)日：2011-02-17
申请号：JP2009177226
申请日：2009-07-30
申请人： Kansai Electric Power Co Inc:The , Sumitomo Kinzoku Technol Kk , 住友金属テクノロジー株式会社 , 関西電力株式会社
发明人： UEMURA HIROMI , SAWARAGI YOSHIATSU , YANAGIDA MIYUKI
IPC分类号： C21D9/50 , C21D1/42
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a heat-treatment method for regenerating a part deteriorated by creep damage, particularly a part with deterioration in creep strength such as a welded part. SOLUTION: The heat-treatment method includes heating a member having creep voids to a heating temperature equal to or higher than the Ac 3 transformation point, wherein the heat-treatment is conducted under such a condition that a Larson Miller parameter (LMP value) defined by equation (1): LMP=(T+273)×(20+logt) (wherein T is the heating temperature (°C); and t is the heating time (h)), satisfies ≥24,000 at a heating temperature equal to or higher than the Ac 3 transformation point, so that the ratio of the number of creep voids present at a grain boundary per unit area of the member after the heat-treatment to that before the heat-treatment becomes ≤0.3. The heating temperature is preferably within the range of from "Ac 3 transformation point+30°C" to "Ac 3 transformation point+70°C". COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于使由蠕变损伤恶化的部分再生的热处理方法，特别是焊接部分的蠕变强度劣化的部分。解决方案：热处理方法包括将具有蠕变空隙的构件加热到等于或高于Ac 3 相变点的加热温度，其中热处理在这种条件下进行由式（1）定义的Larson Miller参数（LMP值）：LMP =（T + 273）×（20 + logt）（其中T是加热温度（℃）; t是加热时间（h））在等于或高于Ac 3 相变点的加热温度下满足≥24,000，使得存在于构件之后的构件的每单位面积的晶界处的蠕变空隙数热处理前的热处理为≤0.3。加热温度优选在“Ac 3 相变点+ 30℃”至“Ac 3

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