摘要:Self--propagating high-temperature synthesis (SHS) is a novel processing technique for the production of advanced materials. The microstructures of the combustion synthesised Ni-it intermetallic compounds have been examined, and the influence of Ti on the microstructure has been investigated, It has been found that a small addition of Ti is beneficial to get products with fined as-cast microstructure. With more addition of Ti,it is possible to get single β1,-Ni3 Si phase in as-cast condition.
摘要:The liquid of binary Al-7%Si alloys, both high purity and commom purity, has been superheated in the temperature range of 700-1200℃. The influences of superheating on the microstruture, microhardness, grain size and thermal analysis of solidification have been studied.High super-heating increases the α-Al dendrite size, has little effect on eutectic structure, doesn’t change the eutectic temperature and reduces slightly the primary solidification temperature. The changes of microhardness are not obvious, and the grain sizes are not affected for high purity alloys, but they are enlarged for commom purity alloys when superheating.
摘要:This paper deals with the using of sythetic iron with high manganese and high residual elements in pouring centrifuglly casted ductile iron pipe in resin sand coated metal mould.Studies were made on the influence of in-mould inoculation, instant inoculation and bismuth inoculation on the plasticity of cast ductile iron pipe. Meanwhile,a rule is also studied in this paper to examine how manganese, silicon and carbon equivalent as well as thickness of precoated sand affect the plasticity of cast ductile iron pipe.
关键词:Centrifugal Casting;Resin Sand Coated;Ductile Iron Pipe
摘要:Numerical simulating technics is uesed here to study the one demensional untable temperature field in solidfying process of the steel casting inlayed high-Cr iron. The paper suggests a way to calculate the inlaying proportion. The range of the inlaying proportions is also given.
关键词:Unstable temperature field;Inlaying proportion;Numerical Simulation