压力容器
壓力容器
압력용기
2014年
10期
22-28
,共7页
王德宪%纪冬梅%陈建钧%王昊%陈乃超
王德憲%紀鼕梅%陳建鈞%王昊%陳迺超
왕덕헌%기동매%진건균%왕호%진내초
P92钢%蠕变-疲劳%延性韧窝断裂%微观形貌
P92鋼%蠕變-疲勞%延性韌窩斷裂%微觀形貌
P92강%연변-피로%연성인와단렬%미관형모
P92 steel%creep-fatigue%ductile dimple fracture%micro-pattern
以P92钢为研究对象，进行600℃下应力控制的蠕变-疲劳交互作用试验；分别讨论了应力比、保载时间对试验寿命的影响，并对断后试样金相组织和SEM断口形貌进行对比。研究表明，在本试验条件下，应力比、保载时间与试验寿命成反比，且随着保载时间的增加，应力比对寿命变化的影响逐渐减弱；各工况下试样金相组织未发生明显变化，试样断裂特征表现为以蠕变损伤为主的延性韧窝断裂。
以P92鋼為研究對象，進行600℃下應力控製的蠕變-疲勞交互作用試驗；分彆討論瞭應力比、保載時間對試驗壽命的影響，併對斷後試樣金相組織和SEM斷口形貌進行對比。研究錶明，在本試驗條件下，應力比、保載時間與試驗壽命成反比，且隨著保載時間的增加，應力比對壽命變化的影響逐漸減弱；各工況下試樣金相組織未髮生明顯變化，試樣斷裂特徵錶現為以蠕變損傷為主的延性韌窩斷裂。
이P92강위연구대상，진행600℃하응력공제적연변-피로교호작용시험；분별토론료응력비、보재시간대시험수명적영향，병대단후시양금상조직화SEM단구형모진행대비。연구표명，재본시험조건하，응력비、보재시간여시험수명성반비，차수착보재시간적증가，응력비대수명변화적영향축점감약；각공황하시양금상조직미발생명현변화，시양단렬특정표현위이연변손상위주적연성인와단렬。
Creep-fatigue( CF) tests of P92 steel at 600 ℃ under stress-controlled were carried out in this study.The effects of different stress ratios and holding times on CF interaction were investigated by analyzing the experimental data and observing microstructure of the samples.It is shown that cycle life is inversely proportional to the stress ratios and holding times.When the holding times reach a certain value, the stress ratio has little effect on creep-fatigue life.The microstructure of P92 steel is not changed sig-nificantly and still remain the structure of lath martensite.The feature of specimens belongs to ductile dim-ple fracture which dominated by creep damage.
