Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第12卷    第3期    总第48期    2002年6月

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文章编号:1004-0609(2002)03-0458-06
激光熔凝的数值模拟及其在激光定向凝固中的应用
刘振侠,黄卫东,杨  森

(西北工业大学 凝固技术国家重点实验室, 西安 710072)

摘 要: 建立了一套激光熔凝的数学模型和计算方法,给出了两种条件下熔池深度与扫描速度的关系曲线。计算结果与实验值吻合良好,验证了模型的有效性。根据计算分析了激光工艺参数与激光定向凝固组织的关系。据此通过工艺参数的匹配,在熔池顶部得到了与扫描方向完全一致的凝固组织。

 

关键词: 激光熔凝;数值模拟;定向凝固

Numerical simulation of laser
 surface re-melting and its use in
 laser directional solidification
LIU Zhen-xia, HUANG Wei-dong, YANG Sen

State Key Lab of Solidification Processing,
Northwestern Polytechnical University, Xi′an 710072, China

Abstract:A model and a numerical method of laser surface re-melting were established. The relationship between the depth of laser melted pools and the laser scanning velocity was calculated for two base materials. The calculations agree with the experiments well, and these validate the model. The relationship between the laser processing parameters and laser directional solidification morphology was analyzed by the model. Based on the model, the morphology with the growth direction same with scanning direction was obtained at the top of the melting pool through the match among the processing parameters.

 

Key words: laser re-melting; numerical simulation; directional solidification

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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