简介:磨擦促使处理(FSP)作为在12修理裂缝的一个方法被调查?公里厚304L不锈钢板。愈合的可行性被用一个PCBN/W-Re工具处理一个逐渐变细的裂缝与表明一25?公里直径肩膀和6.4的大头针长度?公里。实验证明愈合是可能的开始的一个裂缝狭窄然后日益增多地长大到2的宽度?公里。板实验上的祷告被用来为创造发现最好的参数一巩固与贱金属相比与坚硬差别的最少的数量搅动地区。在一些标本的谷物精炼更高导致了大部分搅动地区坚硬,与贱金属相比。谷物尺寸对microhardness的一个阴谋显示出在谷物尺寸和坚硬之间的很强壮的反的关联,从Hall-Petch关系期望。腐蚀测试被执行以便在stir地区的潜在的促进感受性上评估FSP的效果。在1000以后?在在没有腐蚀产品在基础材料控制上或在任何磨擦上形成了,这被发现的房间温度的3.5%盐溶液的断断续续的沉浸的h搅动处理标本。
简介:摘要本文对新型奥氏体耐热钢Super304H(A213-S30432)进行简单介绍,分析了该钢种的焊接性及焊接技术要点,结合我公司的工程实例对焊接该钢种所采取的焊接工艺方法及所遇到的质量问题进行了总结。
简介:摘要本文介绍了Super304H钢小径管氩弧焊工艺的评定试验,以及Super304H焊接工艺应用于某电厂三期扩建工程2×600MW超超临界机组#5锅炉高温再热器的具体情况。
简介:TheregularvariationsinmagmaticactivitiesalongtheNorthwestPacificplatehavebeenlittlestudiedinspiteoftheirimportance.Inthiscontribution,systematicanalyseswereconductedontholeiiticbasaltsfromthreeOceanDrillingProgramsites(Sites304,1149,and801),includingthepetrographicfeatures,majorandtraceelements,Ndisotopiccompositions,andmineralstructureandcompositionsofwholerocks.VolcanicrocksfromSites304,1149,and801belongtotholeiitesandexhibitdepletedlightrareearthelements(LREE),largeionlithophileelementalcontents(LILE),andrelativelydepletedNdisotopicratios(143Nd/144Nd=0.513139-0.513211),similartothoseofnormalmid-oceanridgebasalts(N-MORB).Comprehensivedataonmineralcompositions,whole-rockgeochemistry,andgeochronologydemonstratethataregularvariationtrendexistsinthenorth-southdirectionalongtheNorthwestPacificplate.The143Nd/144Ndvalues(0.513139-0.513211)andtrace-elementratiosforwholerocks(Sm/Th=15.35-30.00;Zr/Hf=28.53-35.76;Zr/Y=2.58-3.67;Th/La=0.04-0.06;Th/Y=0.33-0.70),aswellasthetrace-elementratios(Zr/Hf,La/Yb,Ti/Zr)ofclinopyroxenesfromSites1149and801tholeiitesshowlargervariationscomparedtothosefromSite304tholeiites(143Nd/144Nd=0.513185-0.513195;Sm/Th=18.19-20.58;Zr/Hf=31.07-33.26;Zr/Y=2.62-3.03;Th/La=0.05-0.06;Th/Y=0.48-0.57).MineralzoningtextureswereobviousintholeiitesfromSites1149and801butwererarelyobservedinSite304.Theseregularfeatureswerelikelyattributedtothedifferencesintheheterogeneityofthemagmasource,theprocessofmagmatieevolution,theplate-spreadingrate,andtheeffectiveandineffectivemixing.
简介:Theyolk-shellFe3O4@Cnanocubesweresuccessfullysynthesizedthroughcarbothermicreductionprocessfromcarbon-coateda-Fe2O3precursor.Theresultsshowthattheyolk-shellFe3O4@Cnanocubesareuniformlycoatedwithathincarbonlayer,andaclearcavityabout150nminwidthbetweenFe3O4coreandcarbonshellareformedduetothevolumeshrinkageduringthereductiontreatment.Theobtainedyolk-shellFe3O4@Cnanocubesexhibitexcellentcyclingstability(thedischargecapacityis709.7mAh/gafter100cyclesatthecurrentdensityof0.1C)andrateperformance(1023.4mAh/gat0.1C,932.5mAh/gat0.2C,756.1mAh/gat0.5C,405.6mAh/gat1C,and332.3mAh/gat2C,andmoreimportantly,whenthecurrentdensityfinallybacksto0.1C,acapacityof776.8mAh/gcanberestored).Theoutstandinglithiumstoragepropertiesmaybeattributedtotheuniqueyolk-shellstructures.