摘要:Through pouring experiments, the characteristics of flowing and filling of molten metal in EPS-V process are studied; the change and influence of vacaum value in the mould are measuted with the aid of sensors; a comparison of different gating systems is also made. The results obtained are of great aid to further studies of interactions among the metal, the mould and the evaporative plastic pattern and to the studies of forming theory of castisgs, as well as to the establishment of a reliable basis for the design of EPS-V foundry process.
摘要:The wear resistance of high aluminium zinc-based alloys containing 30, 40 and 45% wt. Al at diffrent conditions was investigated. It was shown that the high aluminium zinc-based alloys were superior to ZCuSn6Zn6Pb3 and ZCuA19Fe4 in wear resistance providing the castings are of higher soundness, and a suitable as-cast aging could improve the wear resistance of Zinc-based alloys. In addition, the effects of soundness of castings on wear resistance was analyzed, the wear resistance mechanism of these alloys was explored.
摘要:By means of optical metalloscope, scanning electron microscope and electronic probe, authors have examined and analysed the of breakage coarse grains section of Ti-bearing Al-Si piston alloys, The cause of piston fracture, and the wag of control have been suggested.
摘要:The filling ability of aluminium alloy ZLJD-2S in the counter-pressure sand casting process has been experimentally determined. The relationship between the filling ability and the shape modulus of castings has been obtained when the filling temperature and pressure difbereace keeping constants, ie T=710C and P=0. 06MPa.
摘要:The effects of metallurgical factors on mechanical properties of tin bronze were invastigated, including chemical composition, melting temperature, pouring temperature, melting cycle and fcltration technique.
摘要:The needle form of iron compounds in an eutectic Al-Si alloy has been changed into spheroidal form after the alloy is heated to a high temperature and poured into a permanent mold. The mechanical properties of the alloy containing 0.8%1.8% Fe have become much better obviously due to the spheroidization of needle iron compounds with spheroidized, iron compunds, the room-temperature tensile strengh of the alloy containing 1. 8%Fe is increased by 83% , the elongation at 300C is increased by 80% as compared with the alloy whose iron compounds were of needle form. The spheroidal form of the iron compounds could be remained after remelting.