摘要:Filling Process of thin-walled castings has been studied by hydraulic simulationmethod using fast speed photography and video rocording. Flow morphology and mechanism ofpattern formation was given and discussed for thin-walled casting during anti-gravity mould fillig.
摘要:It has been found by lab-made apparatus that the osmotic pressure of molten alloythrough sodium silicate sand is about 0.18 MPa, which may cause metal penetration. Alumina alcoholic quick-curing coatings may be used for improving the surface quality of large copper alloycastings.
摘要:The technology of boronization is applied on the surface of carbon steel investmentcasting(I.C.).It is proved that: A boronning depth of about 1. 05mm can be reached. The Vickers hardness of boronic phase is in the range of 800~1 000 g/μm2. Surface decarburization of carbon steel I.C.would be beneficial to boronizing.
摘要:The effects of lead and borax on the casting structure were investigated. The resultsshow that typical modified structure was obtained when 0. 8% ~ 1. 0% lead was added. Borax hasthe functions of modification and refining grain. If some other substances were added, a new kindof compounded additive may be obtained.
摘要:A temperature measurement system was developed by using a infrared thermometerand a MCS- 51 microcomputer. The result of the practical application showed that the system wasable to measure the temperature of the internal surface of centrifugal cast metal accurately. Thus,it provided reliable basis for improving the bimetal cetrifugal cast technology.