The Effect Of Al-Ti-C And Rare Earth La On The Microstructure And Performance Of Zl114A

ZL114A alloy has been used widely in the field of the aviation, aerospace and militaryindustries because of its high mechanical and casting properties. ZL114A alloy is suitable forcasting of complicated shape and high strength castings. However some alloys whichare producted by domestic enterprise can’t meet the requirement of the aerospace industryand High performance requirements of parts. So it has great significance for us to improve themechanical properties of ZL114Aalloy by refinement and metamorphic process.The paper uses XRD、SEM、DSC、ect testing equipment. First of all, we use Alpowder、Ti powder、graphite powder as raw material to synthetic Al-Ti-C Intermediate alloywhich is reacted in box resistance furnace. We study the influences of Ti/C、 ignitiontemperature、holding time which play important roles; Secondly Al-Ti-C which has beendiluted is used for refining industrial pure aluminum, thus we can study addition amount andholding time; Thirdly, we research the influence of addition amount of Al-Ti-C on ZL114Aalloy; Lastly, we study the influence of addition amount and temperature of Al-Ti-C onZL114Aalloy.The research show that:(1)Al-Ti-C alloy contains more TiC is prepared when Ti/C is6and the ignition temperature is1000℃,after react,5min has been hold;(2)hold20min afteradding0.5%Al-5Ti-0.833C can turn industrial pure aluminum’s columnar crystal all intoisometric;(3) adding0.4%Al-5Ti-0.833C can reduce the secondary dendrite spacing ofZL114A alloy, refine grain and improve the mechanical properties of ZL114A alloy;(4) adding0.3%Al-5Ti-0.833C can reduce the secondary dendrite spacing of ZL114Aalloy, metamorphic eutectic silicon, refine grain and improve the mechanical properties ofZL114Aalloy.