陈敦军
,
吴诗惇
,
向毅斌
,
李淼泉
兵器材料科学与工程
doi:10.3969/j.issn.1004-244X.2000.06.012
板料激光成形是通过局部瞬态加热产生不均匀的内部热应力,而导致板料变形的一种无模成形技术.本文阐述了激光成形的四种主要的变形机制-温度梯度机制,弹性膨胀机制,塑性皱曲机制和增厚机制,并介绍了激光成形技术在国内外的发展状况及其应用领域.
关键词:
板料
,
激光成形
,
变形机制
,
温度梯度
何世文
,
欧阳鸿武
,
刘咏
,
周科朝
材料导报
钛及钛合金因具有优良的综合性能,在军工、民用等领域已得到日益广泛的应用.采用粉末冶金方法生产钛制品不仅成本低,而且产品性能好,因而粉末冶金方法是低成本制备高质量钛合金件的实用技术.介绍了近年来开发的几种制备钛及钛合金件的粉末冶金新技术及其应用状况.
关键词:
钛合金
,
粉末冶金
,
金属注射成形
,
激光成形
,
温压成形
Y.J. Shi
金属学报(英文版)
Laser forming is a new flexible and dieless forming technique. To achieve the high accuracy forming, the temperature gradient mechanism (TGM) is studied. In the analysis of TGM, the plate bends about x-axis and about y-axis as well. To understand the deformation trend, the numerical simulation of deformation of plate is conducted by choosing different laser powers, laser spot diameters, scanning speeds, lengths, widths and thicknesses. From the results of simulation, it can be seen that the laser spot diameter, the scanning speed, laser power and thickness of plate play dominant roles in the laser forming process. However, the bending angles αx and αy show different trends with the variation of parameters. In addition, in comparison with above four parameters, the effect of length and width of plate on the bending angle may be neglected, but their effects are significant for the bending radius R.
关键词:
aser forming
,
温度梯度机理
,
金属板材
