散热模组中热管位置研究

由＂热致失效＂介绍电子设备散热的重要性及方式,通过将模型简化及热管位置的方案规划,经CFD仿真软件对各方案进行分析并对比结果,以此得出适合的最优化设计。     

Wear resistance of laser cladding and plasma spray welding layer on stainless steel surface

The effect of coatings, which are formed with laser cladding and plasma spray welding on 1Cr18Ni9Ti base metal, on wear resistance is studied, A 5-kW transverse flowing CO2 laser is used for cladding Co base alloy powder pre-placed on the substrate. Comparing with the plasma spray coatings, the spoiled rate of products with laser clad layers was lower and the rate of finished products was higher. Their microstructure is extremely fine. They have close texture and small size grain. Their dilution resulting from the compositions of the base metal and thermal effect on base metal are less. The hardness, toughness,and strength of the laser cladding layers are higher. Wear tests show that the laser layers have higher properties of anti-friction, anti-scour and high-temperature sliding strike. The wear resistance of laser clad layers are about one time higher than that of plasma spray welding layer.     

仿射图形的计算机作图方法的研究

根据透视仿射理论 ,研究在计算机上作截切平面的方法 ,探讨截平面在工程中的实际应用     

耐酸不锈钢表面激光熔覆层耐腐蚀研究

本文研究了在耐酸不锈钢基体上采用激光熔覆和等离子喷焊二种工艺形成的涂层对耐腐蚀性的影响。使用５ｋＷ横流ＣＯ２激光器对预置在基体上的Ｃｏ基自熔合金粉末进行熔覆加工,得到的熔层与等离子焊层对比：激光熔层缺陷率低,被机体稀释率更小,成品率更高。其组织致密均匀,晶粒细小,熔层硬度与强韧性更高。性能试验证明：激光熔层有更好的耐腐蚀性能。     

基板受辐照比值对激光同轴熔丝沉积稳定性的影响

激光熔丝沉积技术是一种输送丝材并以激光为热源的定向能量沉积技术。为了探讨同轴熔丝过程的机理与效应,采用自主研发的激光内同轴送丝熔化沉积技术来分析研究基板受辐照比值对于熔丝过程稳定性的影响;借助高速相机拍摄并分析熔丝沉积过渡阶段机理;通过数学模型计算与实验验证的方式研究了熔丝沉积动态过程与工艺参数之间的关系。结果表明：较小的基板受辐照比值会引起“液滴”过渡熔丝行为,即处于稳定与不稳定的临界状态;而基板受辐照比值较大时会引起“液桥”过渡熔丝行为,即处于一个相对稳定的状态。本研究对激光熔丝沉积的动力学稳态性分析具有一定的指导意义。     

不锈钢表面激光熔覆层与喷焊层耐磨性对比研究

本文研究在１Ｃｒ１８Ｎｉ９Ｔｉ基体上采用激光熔覆和离子喷焊二种工艺形成的涂层对耐磨性的影响。使用５ｋＷ横流ＣＯ２激光器对预置在基体上的Ｃｏ基自熔合金粉末进行单道或多道扫描，得到的熔层与等离子焊层对比结果是：激光熔层缺陷率低，成品率高，其结构致密均匀，晶粒细小，成分稀释率更小，对基体热影响小，熔层硬度与强韧性更高。性能试验证明：激光熔层具有更高的抗擦伤磨损和抗冲击滑动高温磨损性能，耐磨性提高了一倍左右。     

悬臂梁卡扣保持面深度设计

通过对等截面和变截面悬臂梁卡扣的最大保持面深度计算公式的推导,验证了相关经验公式,给悬臂梁卡扣设计者提供借鉴。     

Wear resistance of laser cladding and plasma spray welding layer on stainless steel surface

The effect of coatings, which are formed with laser cladding and plasma spray welding on lCrl8Ni9Ti base metal, on wear resistance is studied, A 5-kW transverse flowing CO2 laser is used for cladding Co base alloy powder pre-placed on the substrate. Comparing with the plasma spray coatings, the spoiled rate of products with laser clad layers was lower and the rate of finished products was higher. Their microstructure is extremely fine. They have close texture and small size grain. Their dilution resulting     

金属切削数据库系统──车削数据库的开发研究

本文对离散型车削数据库建库以及主库关键字构成问题进行了研究，并以此建立了离散型车削数据库及其数据管理程序，实现了对车削数据的检索、更新、输入和报表输出等管理功能．