摘要:’ To counter the serious porosity tendency of ZA-27 alloy, this paper has concentrated on the effect of solidification order on the properties of the alloy. The results indicated that it is difficult to improve the mechanical properties of the alloy remarkably before the preveting of serious porosity tendency. Since the directional solidification can considerably alleviate the porosity level of the alloy, the mechanical properties of the alloy, especially the plasticity, could be significantly improved. The fracture toughness Klc could also be increased.
Zhou Bidei Xu Zhiyun Pen Deilin An Geying Min Guanghun
Issue 2, Pages: 4-7(1993)
摘要:A rheologic technique is studied for manufacturing zinc-matrix/crystal-silicon, ceramie paniculate composite materials. With orthogonal experiment, the influences of each factors on particle gaining rate are reported, optimal technique parameters are obtained. The influence of viscosity, wettability, agitating rate and time on "particle gaining rate" are analysed.
摘要:The pattern-making technology of precision castings with materials composed by foamed polystyrene and wax has been studied. The method of cohesion of the patterns to be composed and the technology of stripping and sintering have also been proposed.
摘要:The influence of RE modification on the structure and properties of Al-Si alloy was investigated. The optimun range of RE addition and the modification temperature were obtained. After heat treatment, the ultinate strength of Al-Si alloy could exceed 350 MPa, and the elongation could equel to 2%.
摘要:The background for producing HP coatings is presented and the main properties of coatings and introduced. The opplication of HP coatings on high the coatings have good thermal physical properties, lubrication and durability.
摘要:The effects of mischmetal addition on the microstructure in centrifugal casting lead brinze hare been studied. The results showed that mischmetal addition can refine the microstructure of the alloy and promote uniform distribution of lead thronghout the casting structure, therefore, prevent lead segregation effectively. Furthermore, the suitable dosage of mischmetal addition has also been tested.
摘要:This paper compares and analyses the properties of colloidal silica binder and refractory material produced by domestic and forcing. Based on above, the technical parameters of ceramic shell material pe produced by Wuhan chemical plant and Nanpiao molding material plant is suggested.