离心铸造某些领域的发展及其展望

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1、离心铸造某些领域的发展及其展望唐军南通大学机械工程学院机电121摘要'铸造是机械制造巾生产机器零件或毛坯的主要方法之一，而离心铸造是利川离心力的作用进行铸造的方法，其在机械生产中得到广泛应用。而在离心铸造中影响铸件的质量主要因素主要有：喷涂质M:、浇铸温度、型筒转速以及型筒转动平稳度。便于生产双金属铸件但是离心铸造的铸件容易偏析，不适合铸造密度偏析倾向大的合金。离心铸造工艺制品发展分析:离心铸造钢铁合金然而因铁液由外向内的凝固速度大导致夹渣、气泡内浮速度慢于凝固前沿由外向内的推进速度，从而使渣、气泡留在铸件内产生气孔、夹渣。一浇入型内即凝固，使夹渣和气泡

2、根本无法内浮而被凝固在在铸件内，形成气孔、夹渣。二、离心铸造铜合金和铝合金据研宄显示：随着离心速度的增加，zCuSn3Zn8Pb6NilFeCo合金的平均品粒大小会先减小后增加，而离心压力降低了临界晶核形核能，提高了扩散激活能和形核速率。关键词•.离心铸造，钢铁合金，铜铝合金，发展，展望DevelopmentandProspectofsomeareasofcentrifugalcastingTangJunofNantongUniversityMechanicalEngineeringCollege121Abstract:castingisoneofthe

3、mainmethodsofmachineproductionpartsorblankinmechanicalmanufacturing,andcentrifugalcastingisacastingmethodbyutilizingthecentrifugalforce，whichiswidelyusedinmachineryproduction.Themainfactorsthatinfluencethequalityofcentrifugalcastingcastingmainlyhas:thequalityofspraying，pouringtem

4、perature，cylinderspeedandbarrelrotationstability.Undertheactionofcentrifugalforce，thedirectionalsolidificationofmetalcastingfromtheoutsidetotheinside，compactstructure,noshrinkage,shrinkage,porosity,inclusionsandotherdefects,mechanicalproperties，needtogate，riser,highutilizationrat

5、eofmetal.Forproductionofdualmetalcastingsbutcentrifugalcastingeasysegregation，notsuitableforcastingdensitysegregationtendencyofalloy,(two)，analysisofacentrifugalcastingsteelalloy，howeverbecauseofliquidironfromsolidificationrateinthehighleadslag，floatingrateisslowerthanthesolidifi

6、cationfrontvelocityofbubbleisinadvance，thecentrifugalcastingprocessofproductdevelopmentandmakeslag，bubblesincastingporosity，slaginclusion.Apouringtypesolidification，theslagandbubblecannotfloatingandsolidifyincasting,formingblowhole,slag.Two,centrifugalcastingcopperalloyandaluminu

7、malloyaccordingtotheresearchshows:withtheincreaseofthecentrifugalspeed，theaveragegrainsizeofzCuSn3Zn8Pb6Ni1FeCoalloydecreasesfirstandthenincreases，whilethecentrifugalpressurereducesthecriticalnucleusnucleation,improvesthediffusionactivationenergyandthenucleationrate.Keywords:cent

8、rifugalcasting，steelalloy,copperalloy，de