共搜索到12649条信息，每页显示10条信息，共1265页。用时：0小时0分0秒894毫秒
deformation behaviour of Y112 die casting aluminum alloy with nondendritic structure obtained under the semi-solid isothermal treatment condition of 570 ℃ and 120 min, was investigated by means..., the compression stress increases along with the deformation rate increasing. Key words: semi-solid isothermal treatment; nondendritic structure; Y112 aluminum alloy; compression deformation 1......
......
Effects of Semi-solid Isothermal Heat Treatment on Microstructures and Damping Capacities of Fly Ash Cenosphere/AZ91D CompositesEn-Yang Liu1,2,Si-Rong Yu1,Ming Yuan1,Fan-Guo Li1,Yan Zhao1,Wei Xiong11...-solid isothermal heat treatment on the microstructures and damping capacities of fly ash cenosphere/AZ91D composites were investigated.With the increase in isothermal temperature or holding time......
as a pretreatment in preparing semi-solid slurry with fine microstructure before isothermal treatment of wrought aluminum alloy 7A09. Parameters of pretreatment were optimized by orthogonal experiment design and proper precursor was prepared. The evolution of microstructure of semi-solid slurry during isothermal treatment was analyzed and the mechanism of microstructure refining was discussed. The result......
-liquid zone temperature. Microstructure evolution of the semi-solid billet during two-step reheating was studied by optical microscope and compared with that during isothermal reheating. The results show that the remelting rate of the semi-solid billet during two-step reheating is faster than that during isothermal reheating. Under the same reheating time, the grains of the semi-solid billet reheated......
. 263-268. [5]LI Yuan-dong, HAO Yuan, CHEN Ti-jun, et al. Effects of isothermal heat treatment on microstructure evolution and formability of AZ91D magnesium alloy in semi-solid state [J]. The Chinese... treatment method is not feasible to prepare AZ91D magnesium alloy semi-solid billets. 3.3 Microstructure of materials prepared by SIMA On heating at 560℃, microstructure of materials prepared by SIMA......
step by semi-solid isothermal treatment, semi-solid billet with fine spheroidal grains of 25 μm can be prepared successfully. Compared with common SIMA, thixoformed satellite angle frame components.... However, for magnesium alloy, coarse and non-globular grains often exist in the microstructure of semi-solid billets prepared by common SIMA method, that is, semi-solid isothermal treatment of upsetted......
of AZ91D chips under isothermal holding at solid state 3.2.1 Effect of isothermal holding temperature It should be pointed out that the solid state here means the temperature range before the melting of solid phase. Isothermal holding of the chips at solid state for this study was therefore carried out below the eutectic temperature of 439 ℃. Taking holding temperatures of 175 ℃ and 437......
of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China摘 要:The semi-solid billet of 6061 aluminum alloy... the microstructure and properties of the semi-solid alloy.The effects of different processing parameters,such as holding temperature and holding time,on the semisolid microstructures during partial remelting have......
......
