摘要:Iron phase morphology and properties of Al-Si alloys containing night Fe Content at different conditions were investigated. It was shown that the appearance of primary iron phase was changed from coarse needle-plate form to fine short plate, polyhedron, Chinese script and granular form after Mn addition or high temperature superheat treatment. The mechanical property and castability of the alloys were obviously increased and improved respectively. The fracture model of the alloys with modified and unmodified iron phase was also analyzed
摘要:The Rheological and technological properties of colloidal silica sol sllurry and the influencing factors were studied. It was shown that the yield value of colloidal silica sol slurry was increased and its suspensibility was improved by adding some additives. The mechanism for these improvements was discussed.
摘要:The microstructures of hypereutectic Al-Si alloys under rotary magnetic field have been studied. Experimental results show the primary Si grain can be refined , and the specimen surface a rich primary Si area can be obtained. So wear property of the alloys is improved. The better effect may be obtained when rotary inagnetic field condition unite with modification with phosphorus.
Lin Youdong Yuan Zhongyue Zhang Zhongming Liu Baodi
Issue 5, Pages: 12-14(1993)
摘要:The carbon pick-up of cast steel ZG25 was studied by changing the technology factors such as coating permeability, coating thinkness vaccum degree,etc. The opinion that the carbon pick-up would be mainly occured between the interface of metal and mold was put forward, and which would be easily restrained by reducing the deposit concentration of EPS degradation products at the surface of the mold.
摘要:In this paper the structure and hardness performances of Cu-Cr-Zr-Mg alloy under casting state, solid solution quenching, cold deformation and ageing treatment were investigated. The changes of the structure and hardness at diffenrent time and ageing temperature,after the alloy had taken place more 40% cold deformation, were analysed. The optimum ageing process was determined. The thermology performance and mechanical nature of the alloy were also measued. All results showed that this kind of copper alloy belongs to the middle strength and high conductive alloy.
摘要:The equipment , mould structure and processing of manufacturing aluminum alloy handle stems of bicycle using extrusion casting method are presented. By testing, it is determined that this is an effective method of manufacturing high quality aluminum alloy handle stems with high comprehensive mechanical properties.