The recent research and development of forged magnesium road wheel were reviewed.Methods of flow-forming,spin forging of manufacturing a forged magnesium alloy wheel were introduced.A new extrusion method was investig...The recent research and development of forged magnesium road wheel were reviewed.Methods of flow-forming,spin forging of manufacturing a forged magnesium alloy wheel were introduced.A new extrusion method was investigated especially. Extrusion from hollow billet was proposed in order to enhance the strength of spoke portion and reduce the maximum forming load. By means of the developed technique,the one-piece Mg wheels were produced successfully by extrusion from AZ80+alloy.At the same time,the existing problems on the research and development of forged magnesium road wheel were analyzed.The impact testing,radial fatigue testing and bending fatigue testing results show that AZ80+wheel can meet application requirement in automobile industry.展开更多
A video shot at a hospital in Beijing went viral on the social network in late January,in which a woman wept inconsolably in the hall of the Guang’anmen Hospital.She revealed that she had been waiting for two days bu...A video shot at a hospital in Beijing went viral on the social network in late January,in which a woman wept inconsolably in the hall of the Guang’anmen Hospital.She revealed that she had been waiting for two days but still couldn’t get an outpatient appointment,as they had all been booked by scalpers.The scalpers resold one appointment for 4,500 yuan（$688）,15 times higher than the original fee of300 yuan（$46）.展开更多
基金Project(50735005)supported by the National Natural Science Foundation of China
文摘The recent research and development of forged magnesium road wheel were reviewed.Methods of flow-forming,spin forging of manufacturing a forged magnesium alloy wheel were introduced.A new extrusion method was investigated especially. Extrusion from hollow billet was proposed in order to enhance the strength of spoke portion and reduce the maximum forming load. By means of the developed technique,the one-piece Mg wheels were produced successfully by extrusion from AZ80+alloy.At the same time,the existing problems on the research and development of forged magnesium road wheel were analyzed.The impact testing,radial fatigue testing and bending fatigue testing results show that AZ80+wheel can meet application requirement in automobile industry.
文摘A video shot at a hospital in Beijing went viral on the social network in late January,in which a woman wept inconsolably in the hall of the Guang’anmen Hospital.She revealed that she had been waiting for two days but still couldn’t get an outpatient appointment,as they had all been booked by scalpers.The scalpers resold one appointment for 4,500 yuan（$688）,15 times higher than the original fee of300 yuan（$46）.
