摘要:Growth frontiers of silicon crystal in Al-Si eutectic alloys have been investigated by means of scanning electron microscope. Results indicate that growing along <100> is inherent in silicon crystal. Its growth direction is unchanged before and after modification. Adding Na element would cause the growth velocity of silicon crystal to quicken.
摘要:In this article, the importance of raising quality of plaster mold, the key points of dewaxing and baking technologies, selection of technological parameters and control basis are investigated based on the test and productive experience.
Wang Yuzhu,Yu Shuzhi,An zhixin,Wang Manyuan,Zhou Lizhi
Issue 1, Pages: 10-14(1989)
摘要:The main purpose of this article is to study the relation between the damping capacities of Mn-Cu aad Cu-Zn-Al alloys and their mechanical behavior, and their damping capacities related to the loading conditions are also studied. Experimental results show that the damping capacities of these alloys are strongly related to the specific loading conditions. Better damping capacities can be obtained by proposed suitable heat treatments.
摘要:The effect of mixed RE on the total amount,compositions, and morphology of inclusions in Al-4%Cu alloy and the inspection method for inclusions have been investigated in this paper. The authors compare the refine effect of RE on Al alloy with that of conventional refinement agent. The test results indicate that the inclusion amount in Al-4%Cu alloy treated by RE is remarkably less than that refined by C2Cl5 or non toxic refinement agent. The best refinement and clearing effects can be obtained if addition of 0.3% RE be applied.
Ye Rongmao,Zhang Dongcheng,LI Bangsheng,Wang Huiguang
Issue 1, Pages: 19-22(1989)
摘要:The materials used in plaster investment mold, process and technical parameters of producing Al-alloy casting by plaster mold for investment casting are described in this paper. The main factors affecting the dimensional accuracy of the casting and the dimensroael relation beteen the core and the casting are given. Using this method, would attain the Al-alloy castings with tolerance as close as+0.05mm and surface finish of 1.255um
摘要:In this paper, the composition of the compounds which Zn 27A1 alloy add rare earth and Ti element is reported. Forming process of these compounds is discussed.