中间合金作为一种冶金行业重要的添加剂,其作用在于熔炼含熔点差异很大的合金时,预制备的中间合金要比纯元素的熔点低,保证添加元素相熔。随着冶金行业的不断发展,新材料的不断涌现,含Ti中间合金也在航空航天领域内得到了广泛的应用。...中间合金作为一种冶金行业重要的添加剂,其作用在于熔炼含熔点差异很大的合金时,预制备的中间合金要比纯元素的熔点低,保证添加元素相熔。随着冶金行业的不断发展,新材料的不断涌现,含Ti中间合金也在航空航天领域内得到了广泛的应用。本文介绍了采用TPN(Thermite Process Nitride)合成法制备航空发动机关键铸件用Nb-N-Ti复合中间合金的工艺。展开更多
Thermal deformation of aluminum alloy casting materials for manufacturing the tire mold was numerically investigated.The AC7A and AC4C casting material was selected as casting material and the metal casting device was...Thermal deformation of aluminum alloy casting materials for manufacturing the tire mold was numerically investigated.The AC7A and AC4C casting material was selected as casting material and the metal casting device was used in order to manufacture the mold product of automobile tire in the actual industrial field.The temperature distribution and the cooling time of casting materials were numerically calculated by finite element analysis (FEA).Also,the thermal deformation such as displacement and stress distribution was calculated from the temperature results.The thermal deformation was closely related to the temperature difference between the surface and inside of the casting.The numerical analysis results reveal that the thermal deformation of AC7A casting material is higher than that of AC4C casting material.Also,the thermal deformation results at the central part are larger than that on the side of casting because of the shrinkage caused by the cooling speed difference.展开更多
文摘中间合金作为一种冶金行业重要的添加剂,其作用在于熔炼含熔点差异很大的合金时,预制备的中间合金要比纯元素的熔点低,保证添加元素相熔。随着冶金行业的不断发展,新材料的不断涌现,含Ti中间合金也在航空航天领域内得到了广泛的应用。本文介绍了采用TPN(Thermite Process Nitride)合成法制备航空发动机关键铸件用Nb-N-Ti复合中间合金的工艺。
基金Project supported by Research Funds from Chosun University(2009),Korea
文摘Thermal deformation of aluminum alloy casting materials for manufacturing the tire mold was numerically investigated.The AC7A and AC4C casting material was selected as casting material and the metal casting device was used in order to manufacture the mold product of automobile tire in the actual industrial field.The temperature distribution and the cooling time of casting materials were numerically calculated by finite element analysis (FEA).Also,the thermal deformation such as displacement and stress distribution was calculated from the temperature results.The thermal deformation was closely related to the temperature difference between the surface and inside of the casting.The numerical analysis results reveal that the thermal deformation of AC7A casting material is higher than that of AC4C casting material.Also,the thermal deformation results at the central part are larger than that on the side of casting because of the shrinkage caused by the cooling speed difference.
