Prediction of cooling rate and microstructure in laser spot welds

被引：53
|
作者：
De, A [1 ]
Walsh, CA
Maiti, SK
Bhadeshia, HKDH
机构：
[1] Indian Inst Technol, Dept Mech Engn, Bombay 400076, Maharashtra, India
[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2003年 / 8卷 / 06期
关键词：
D O I：
10.1179/136217103225005633
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Theoretical and experimental investigations have been carried out to examine the influence of laser power and on time on the weld thermal cycle and weld metal microstructure and hardness during laser spot welding of low alloy steel. A transient heat transfer model that takes into account the temperature dependence of material properties and latent heat of phase transformation is employed to simulate thermal cycles and cooling rates experienced by the material under various combinations of power and on times. Two models for predicting the microstructure and hardness of the weld pool metal from the cooling rates are used to evaluate the results.
引用
收藏
页码：391 / 399
页数：9
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