热处理
熱處理
열처리
HEAT TREATMENT
2014年
4期
55-57
,共3页
SCM435 钢%氢含量%氢致延迟断裂
SCM435 鋼%氫含量%氫緻延遲斷裂
SCM435 강%경함량%경치연지단렬
SCM435 steel%hydrogen content%hydrogen-assisted delayed cracking
材料为SCM435钢的12．9级六角头螺栓服役42 h后发生断裂。为了揭示螺栓断裂的原因，采用光电直读光谱仪、光学显微镜、扫描电镜和测氢仪对断裂的螺栓进行了化学成分、宏观和微观等分析。研究结果表明，螺栓断裂是氢致延迟断裂。
材料為SCM435鋼的12．9級六角頭螺栓服役42 h後髮生斷裂。為瞭揭示螺栓斷裂的原因，採用光電直讀光譜儀、光學顯微鏡、掃描電鏡和測氫儀對斷裂的螺栓進行瞭化學成分、宏觀和微觀等分析。研究結果錶明，螺栓斷裂是氫緻延遲斷裂。
재료위SCM435강적12．9급륙각두라전복역42 h후발생단렬。위료게시라전단렬적원인，채용광전직독광보의、광학현미경、소묘전경화측경의대단렬적라전진행료화학성분、굉관화미관등분석。연구결과표명，라전단렬시경치연지단렬。
The 12.9 grade hex head bolts,made of SCM435 steel,fractured after being installed and laid up for 42 h.The chemical composition analysis,macro-and micro-analysises of the fractured bolt were performed by using photoelectric direct-reading spectrograph,OM,SEM and hydrogen tester to reveal cause of the bolt fracture.The results show that the bolt fracture is a hydrogen-assisted delayed cracking.
