摘要
在厚度为 0 .3— 2 .0mm的 5Cr4Mo3SiMnVAl( 0 1 2Al)模具钢和Cr1 2MoV模具钢薄板上 ,采用脉冲Nd :YAG激光进行了激光熔凝实验 ,研究了工艺参数 (脉冲宽度和脉冲频率 )、材质和材料厚度对激光熔凝后熔凝层几何形状特征的影响 ,并用一维解析模型进行了熔化深度的计算。结果表明 :随着脉冲宽度的增加或脉冲频率的减少 ,激光熔凝区的宽度和深度增加 ;Cr1 2MoV模具钢的激光熔化区宽度和深度比 0 1 2Al模具钢的大 ;随着材料厚度的增加 ,激光熔凝区的宽度增加 ,深度减小 ;用一维温度场解析模型进行熔化深度的计算是有效的。激光熔凝工艺参数。
Laser remelting of thin plate, made of 5Cr4Mo3SiMnVAl(012Al) die steel and Cr12MoV die steel with thickness of 0.3mm to 2.0mm, was carried out by the use of pulsed Nd:YAG laser. The effects of technical parameters such as pulsed width and pulsed frequency, materials and materials thickness on the geometric characteristics of laser remelting zone were studied. One-dimensional (1D) analytical model was also used to calculate the depth of laser remelting. The results show that the width and depth of laser remelting zone increases with the increase of pulsed width or the decrease of pulsed frequency, and the width and depth of laser remelting zone of Cr12MoV die steel is bigger than that of 012Al die steel, and the width of laser remelting zone increases and the depth of laser remelting zone decreases with the increase of materials thickness, and the 1D model is useful for the calculation of laser remelting depth. The main reason is the differences of laser remelting technical parameters, the dissipated heat case of materials and the thermophysical properties of materials.
出处
《应用激光》
CSCD
北大核心
2002年第6期543-547,共5页
Applied Laser
基金
湖北省自然科学基金 ( 2 0 0 0 3 0 2 0 )
国家激光技术重点实验室开放基金
华中科技大学国家模具重点实验室开放基金联合资助
