EFFECT OF TRACE ELEMENTS P AND Mn ON THE MICROSTRUCTURE AND HYDROGEN EMBRITTLEMENT OF AN Fe－Ni－Co BASED SUPERALLOY

ＥＦＦＥＣＴＯＦＴＲＡＣＥＥＬＥＭＥＮＴＳＰＡＮＤＭｎＯＮＴＨＥＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＨＹＤＲＯＧＥＮＥＭＢＲＩＴＴＬＥＭＥＮＴＯＦＡＮＦｅ－Ｎｉ－ＣｏＢＡＳＥＤＳＵＰＥＲＡＬＬＯＹＷＡＮＧＡｎｃｈｕａｎ;ＹＡＮＧＫｅ;ＦＡＮＣｕｎｇａｎ...     

MODEL FOR COARSENING OF SDAS AND ITS VERIFICATION IN MULTICOMPONENT SC SUPERALLOYS

ＭＯＤＥＬＦＯＲＣＯＡＲＳＥＮＩＮＧＯＦＳＤＡＳＡＮＤＩＴＳＶＥＲＩＦＩＣＡＴＩＯＮＩＮＭＵＬＴＩＣＯＭＰＯＮＥＮＴＳＣＳＵＰＥＲＡＬＬＯＹＳＭＯＤＥＬＦＯＲＣＯＡＲＳＥＮＩＮＧＯＦＳＤＡＳＡＮＤＩＴＳＶＥＲＩＦＩＣＡＴＩＯＮＩＮＭＵＬＴＩＣＯＭＰＯ...     

NEW METHODS FOR CALCULATING ACTIVITIES OF COMPONENTS FROM PHASE DIAGRAMS IN BINARY PERITECTIC SYSTEMS

ＮＥＷＭＥＴＨＯＤＳＦＯＲＣＡＬＣＵＬＡＴＩＮＧＡＣＴＩＶＩＴＩＥＳＯＦＣＯＭＰＯＮＥＮＴＳＦＲＯＭＰＨＡＳＥＤＩＡＧＲＡＭＳＩＮＢＩＮＡＲＹＰＥＲＩＴＥＣＴＩＣＳＹＳＴＥＭＳ①ＺｈａｎｇＹｏｎｇｊｕｎＨｕｎａｎＳｕｐｅｒｉｏｒＴｅｃｈＭａｔｅｒｉ...     

DEVELOPMENT OF A NEW GENERATION OF ADDITIVES FOR ALUMINIUM ROLLING LUBRICATION

ＤＥＶＥＬＯＰＭＥＮＴＯＦＡＮＥＷＧＥＮＥＲＡＴＩＯＮＯＦＡＤＤＩＴＩＶＥＳＦＯＲＡＬＵＭＩＮＩＵＭＲＯＬＬＩＮＧＬＵＢＲＩＣＡＴＩＯＮＭａｏＤａｈｅｎｇ；ＸｉａｏＧａｎｇ；ＭａＷｅｎｈｏｎｇ（ＣｏｌｌｅｇｅｏｆＥｌｅｃｔｒｏ－ｍｅｃｈａｎｉｃａｌＥ...     

INFLUENCE OF ADDITIVES ON SLAG－IRON SEPARATION DURING DIRECT REDUCTION OF COAL－BASE HIGH－IRON－CONTENTREDMUD

ＩＮＦＬＵＥＮＣＥＯＦＡＤＤＩＴＩＶＥＳＯＮＳＬＡＧ－ＩＲＯＮＳＥＰＡＲＡＴＩＯＮＤＵＲＩＮＧＤＩＲＥＣＴＲＥＤＵＣＴＩＯＮＯＦＣＯＡＬ－ＢＡＳＥＨＩＧＨ－ＩＲＯＮ－ＣＯＮＴＥＮＴＲＥＤＭＵＤＱｉｕＧｕａｎｚｈｏｕ；ＬｉｕＹｏｎｇｋａｎｇ；Ｊｉａｎｇ...     

IN SITU MEASUREMENT OF BREEDING-FIRE OF SULPHIDE ORE DUMPS

ＩＮＳＩＴＵＭＥＡＳＵＲＥＭＥＮＴＯＦＢＲＥＥＤＩＮＧＦＩＲＥＯＦＳＵＬＰＨＩＤＥＯＲＥＤＵＭＰＳ①ＷｕＣｈａｏ，ＷａｎｇＰｉｎｇｌｏｎｇ，ＭｅｎｇＴｉｎｇｒａｎｇＤｅｐａｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘｐｌｏｉｔａｔｉｏｎＥｎｇｉｎｅｒｉｎ...     

EFFECT OF PARTICULATE SIZE AND CONTENT ON STRENGTH OF SiC_p／2024Al COMPOSITE AND ITS RELATIONSHIP WITH T6－TREATMENT

ＥＦＦＥＣＴＯＦＰＡＲＴＩＣＵＬＡＴＥＳＩＺＥＡＮＤＣＯＮＴＥＮＴＯＮＳＴＲＥＮＧＴＨＯＦＳｉＣ_ｐ／２０２４ＡｌＣＯＭＰＯＳＩＴＥＡＮＤＩＴＳＲＥＬＡＴＩＯＮＳＨＩＰＷＩＴＨＴ６－ＴＲＥＡＴＭＥＮＴ￥Ｍａ，Ｚｏｎｇｙｉ；Ｌｉａｎｇ，Ｙａｎａｎ；Ｌｕ?..     

ANALYSIS OF HYDRAULIC POWER SOURCES DISPOSITION AND ENERGY CONSUMPTION FOR HYDRAULIC DRILL RIG

ＡＮＡＬＹＳＩＳＯＦＨＹＤＲＡＵＬＩＣＰＯＷＥＲＳＯＵＲＣＥＳＤＩＳＰＯＳＩＴＩＯＮＡＮＤＥＮＥＲＧＹＣＯＮＳＵＭＰＴＩＯＮＦＯＲＨＹＤＲＡＵＬＩＣＤＲＩＬＬＲＩＧ￥Ｈｅ，Ｑｉｎｇｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｃｈｉｎｅＥｎｇｉｎｅｅｒｉｎｇ，...     

ASSESSMENT OF THERMODYNAMIC DATA AND STABILITY OF INTERMETALLIC COMPOUNDS

ＡＳＳＥＳＳＭＥＮＴＯＦＴＨＥＲＭＯＤＹＮＡＭＩＣＤＡＴＡＡＮＤＳＴＡＢＩＬＩＴＹＯＦＩＮＴＥＲＭＥＴＡＬＬＩＣＣＯＭＰＯＵＮＤＳ￥ＬＩＷｅｎｃｈａｏ;ＬＩＸｉｎｇｋａｎｇ;ＷＡＮＧＪｉａｎ;ＺＨＯＵＧｕｏｚｈｉ（ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃ...     

APPLICABILITY OF QUASICHEMICAL MODEL FOR SOME LIQUID ALLOYS WITH STRONG-INTERACTED COMPONENTS

ＡＰＰＬＩＣＡＢＩＬＩＴＹＯＦＱＵＡＳＩＣＨＥＭＩＣＡＬＭＯＤＥＬＦＯＲＳＯＭＥＬＩＱＵＩＤＡＬＬＯＹＳＷＩＴＨＳＴＲＯＮＧＩＮＴＥＲＡＣＴＥＤＣＯＭＰＯＮＥＮＴＳ①ＬｉＪｉａｎｆｅｎｇ，ＤｅｎｇＨｏｎｇｍｅｉ，ＣｈｅｎＮｉａｎｙｉＳｈａｎｇｈａｉ...     

INFLUENCE OF EXTRUSION ON DAMPING CAMCITIES OF AS-SPRAY DEPOSITED HIGH SILICON ALLOY ZA27 MODIFIED BY CERIUM

1.IntroductionThedampingcapacityofamaterialreferst0itsabilitytoc0nvertmechanicalvibrationenergyint0thermalenergy.Theapplication0fhighdampingmaterialsmayeliminatetheneedforspeciaienergyabs01bers0rdamperst0attenuateundesirablen0iseandmechan-icalvibrati0n.However,m0st0fthefrequentlyusedmetalsandaJl0ysusuallyexhibitalowdampingcapacity,whicharelimitedintheirapplicati0nandperf0rmanceindynamicstructures[l].Accordingly,materialresearchershavesoughtt0improvethedampingcapacityofmetalsandall0ysasseri0us…     

DAMPING CAPACITY OF HIGH SILICON ALLOY ZA27 PREPARED BY SPRM DEPOSITION

1.IntroductionInrecentyearscontinuousattemptshavebeenmade,particularlyinareasofalloydesignandadoptionofnovelprocesstechniques,todevelophighperformancematerialsasseriouscompetitorstotraditiona1engineeringalloys.Inparticular,muchattentionhasbeengiventoarapidsolidificationtechnique-spraydeposition.Itiswell-knownthatthisprocesshaJsimprovedthemechanicalpropertie8greatlyThosematerialsofferadvantagesinaPplicationswherehighdampingcapacityhighstrengthandhighstiffnessaxea..primaxyconcern.Highdampingal…     

喷雾沉积Ce变质高硅ZA27合金组织与性能

研究了０５％Ｃｅ变质前后喷雾沉积高硅ＺＡ２７合金的组织与力学性能。喷雾沉积高硅ＺＡ２７合金的组织由富Ｓｉ相、光滑无特征区、细层片状共析体、粗层片状共析体所组成；加０５％Ｃｅ变质后，组织结构大大细化，主要由富Ａｌ、Ｃｅ亮点状相、富Ｓｉ、Ｃｅ多角形相以及细层片状共析体组成；显微硬度测量结果表明，Ｃｅ变质提高了材料的塑性，从而有利于高硅ＺＡ２７合金的推广应用。     

INFLUENCE OF ZIRCONIUM ON MICROSTRUCTURE AND DAMPING CAPACITY OF ZA27 ALLOY

1.IlltroductionThedampingcapacityofamaterialreferstotheabilitytoconvertmechanicalenergyofvibrationintoheatthatisdissipatedinthematerial.Itisofgreatsignificancetoimproveitbecausethehighdampingmaterialcanattenuateundesirablenoiseandvibrationandremovethemtothesurroundingsll,2].Itiswellknownforsometimethatcertainzincaluminumajloysfallintothecategoryofhigh-dampingalloys(HIDALLOYS)['].TheZA27ajloyhashighas-caststrength,hardness,andwearresistanceaswellasotherfavorablephysicalproperties.Itisalmos…     

CREEP PROPERTIES OF HIGH SILICON ALLOY ZA27 PREPARED BY SPRAY DEPOSITION

ＣＲＥＥＰＰＲＯＰＥＲＴＩＥＳＯＦＨＩＧＨＳＩＬＩＣＯＮＡＬＬＯＹＺＡ２７ＰＲＥＰＡＲＥＤＢＹＳＰＲＡＹＤＥＰＯＳＩＴＩＯＮ￥ＹＡＮＧＬｉｕｓｈｕａｎ;ＬＩＵＹｏｎｇｃｈａｎｇ;ＹＡＮＧＧｅｎｃａｎｇ;ＺＨＯＵＹａｏｈｅ（ＳｔａｔｅＫｅｙＬａｂｏｒａ...     

稀土对ZA27合金阻尼性能的影响

研究了稀土对ZA27合金阻尼性能的影响规律。结果表明：稀土变质可提高ZA27合金的阻尼性能，经稀土变质后的试样，其内耗是未变质的试样的1．4倍。ZA27合金为发挥其阻尼作用，在频率高于70Hz时，效果明显，且经稀土变质后的试样强迫振动衰减效果比未变质的试样强。     

EFFECT OF ANNEALING ON DAMPING CAPACITIES OF AS-CAST ZA27 ALLOY

1. Introduction Because ZA27 alloy possesses excellent mechanical properties and high damping capacities, it is widely used in industries. ZA27 alloy has good castability and can be easily cast into various castings by permanent mold casting. The solidification of ZA27 alloy in the permanent mold can be considered to be a nonequilibrium process, and thus the supersaturated aluminum-rich ! phase and unstable copper-rich phase may also be found in the solidified ingot. Those nonequilibrium pha…     

Ce对Zn-Al合金组织性能的影响

研究了Ｃｅ对ＺｎＡｌ合金（ＺＡ２７、ＺＡ４３）的力学性能、淬火时效特性及耐磨性的影响。结果表明,Ｃｅ能明显细化合金的铸态组织,提高其强度和塑性。当ＺＡ２７和ＺＡ４３中含Ｃｅ量分别为０．１０％和０．１５％时,获得最佳的力学性能。提出了Ｃｅ细化ＺｎＡｌ合金的机理,加Ｃｅ后成分过冷效应所引起的枝晶熔断脱落对细化α相起主要作用。     

Effect of rare earths on phase transformation in as-cast ZA27 alloy dur-ing compressive creep

The effect of the mixed rare earths of Ce on the phase transformation in as cast ZA27 alloy during compressive creep was investigated under 37 MPa and at 160℃ by X-ray diffraction technique and SEM. The results showed that the as cast microstructure of ZA27-RE alloy consisted of a dendritic Al-rich a' surrounded by Zn-rich β' phase, interdendritic ε phase and Zn-rich η phase together with a complex Z phase which was a complex constitute compound, (RE,Cu)Al5Zn16, dispersed in crystal interfaces or branch crystal interfaces and stable during compressive creep test at 160'C. The phase transformations of ZA27-RE alloy, decomposition of β' phase and four transformation, were delayed by the addition of rare earths, also the lamellar structure and the spheroidized structure in ZA27-RE alloy were finer than in ZA27 alloy during compressive creep test at 160℃ at the same creep time, and the compressive creep resistance of ZA27-RE alloy was higher than that of ZA27 alloy.     

Effect of specific pressure on microstructure and mechanical properties of squeeze casting ZA27 alloy

The effect of specific pressure on the microstructure and mechanical properties of ZA27 squeezed castings with high height-to-thickness ratio was studied. The results of DTA and SEM show that at high specific pressure the eutectic reaction of squeeze casting ZA27 alloy is restrained, and the final solidified structure is (η+ε) phases instead of eutectic phase (β+η+ε). At the same time, the primary reaction is promoted in squeeze casting ZA27 alloy solidified at high pressure, and the fine microstructure is obtained with the increase of pressure. Al and Cu elements are homogeneously distributed in matrix of squeeze casting ZA27 alloy. The homogenously distributed high-density fine ε phase can effectively hinder dislocation motion, and then the strength and plasticity of squeeze casting ZA27 alloy are increased.