In order to effectively reduce energy consumption and increase range mile,new energy vehicles represented by Tesla have greatly aroused the application of integrated magnesium(Mg)alloy die casting technology in automo...In order to effectively reduce energy consumption and increase range mile,new energy vehicles represented by Tesla have greatly aroused the application of integrated magnesium(Mg)alloy die casting technology in automobiles.Previously,the application of Mg alloys in automobiles,especially in automotive cockpit components,is quite extensive,while it has almost disappeared for a period of time due to its relatively high cost,causing a certain degree of information loss in the application technology of Mg alloy parts in automobiles.The rapid development of automotive technology has led to a higher requirement for the automotive components compared with those traditional one.Therefore,whatever the components themselves,or the Mg alloy materials and die casting process have to face an increasing challenge,needing to be upgraded.In addition,owing to its high integration characteristics,the application of Mg alloy die casting technology in large-sized and thin-walled automotive parts has inherent advantages and needs to be expanded urgently.Indeed,it necessitates exploring advance Mg alloys and new product structures and optimizing die casting processes.This article summarizes and analyzes the development status of thin-walled and large-sized die casting Mg alloy parts in passenger car cockpit and corresponding material selection methods,die casting processes as well as mold design techniques.Furthermore,this work will aid researchers in establishing a comprehensive understanding of the manufacture of thin-walled and large-sized die casting Mg alloy parts in automobile cockpit.It will also assist them in developing new Mg alloys with improved comprehensive performance and new processes to meet the high requirements for die casting automotive components.展开更多
The article presents results of the computer simulation of quenching large-size parts in water and aqueous solutions. It has been shown that the main attention should be paid to eliminating film boiling and providing ...The article presents results of the computer simulation of quenching large-size parts in water and aqueous solutions. It has been shown that the main attention should be paid to eliminating film boiling and providing uniform cooling at the surface of the part to be quenched. Simplified formulas for calculating the optimal time of cooling large-size steel parts are presented.展开更多
介绍了采用Ф460 mm PQF连轧管机组热轧,再经Ф720 mm斜轧扩径机组旋轧扩径,生产大直径中薄壁P91无缝钢管的生产工艺;分析了生产的P91无缝钢管的性能。结果表明:采用旋轧扩径工艺生产的P91无缝钢管,其化学成分、成品几何尺寸和力学性能...介绍了采用Ф460 mm PQF连轧管机组热轧,再经Ф720 mm斜轧扩径机组旋轧扩径,生产大直径中薄壁P91无缝钢管的生产工艺;分析了生产的P91无缝钢管的性能。结果表明:采用旋轧扩径工艺生产的P91无缝钢管,其化学成分、成品几何尺寸和力学性能等均满足相关标准要求;其持久强度与常规热轧管机组生产的相当,产品可以在高温高压环境下应用。展开更多
基金supported by the foundation of“Cold area new energy service engineering laboratory battery pack comprehensive test system”from Jilin Provincial Development and Reform Commission(2020C021-6)the National Natural Science Foundation of China(NNSFC,No.52371109).
文摘In order to effectively reduce energy consumption and increase range mile,new energy vehicles represented by Tesla have greatly aroused the application of integrated magnesium(Mg)alloy die casting technology in automobiles.Previously,the application of Mg alloys in automobiles,especially in automotive cockpit components,is quite extensive,while it has almost disappeared for a period of time due to its relatively high cost,causing a certain degree of information loss in the application technology of Mg alloy parts in automobiles.The rapid development of automotive technology has led to a higher requirement for the automotive components compared with those traditional one.Therefore,whatever the components themselves,or the Mg alloy materials and die casting process have to face an increasing challenge,needing to be upgraded.In addition,owing to its high integration characteristics,the application of Mg alloy die casting technology in large-sized and thin-walled automotive parts has inherent advantages and needs to be expanded urgently.Indeed,it necessitates exploring advance Mg alloys and new product structures and optimizing die casting processes.This article summarizes and analyzes the development status of thin-walled and large-sized die casting Mg alloy parts in passenger car cockpit and corresponding material selection methods,die casting processes as well as mold design techniques.Furthermore,this work will aid researchers in establishing a comprehensive understanding of the manufacture of thin-walled and large-sized die casting Mg alloy parts in automobile cockpit.It will also assist them in developing new Mg alloys with improved comprehensive performance and new processes to meet the high requirements for die casting automotive components.
文摘The article presents results of the computer simulation of quenching large-size parts in water and aqueous solutions. It has been shown that the main attention should be paid to eliminating film boiling and providing uniform cooling at the surface of the part to be quenched. Simplified formulas for calculating the optimal time of cooling large-size steel parts are presented.
文摘介绍了采用Ф460 mm PQF连轧管机组热轧,再经Ф720 mm斜轧扩径机组旋轧扩径,生产大直径中薄壁P91无缝钢管的生产工艺;分析了生产的P91无缝钢管的性能。结果表明:采用旋轧扩径工艺生产的P91无缝钢管,其化学成分、成品几何尺寸和力学性能等均满足相关标准要求;其持久强度与常规热轧管机组生产的相当,产品可以在高温高压环境下应用。
