1988 Volume 6 Issue 2 Pages 301-305
This paper deals with a proposal of equation to estimate the cooling time, t8/5, from 800°C to 500°C in various grooves and joints.
It is shown that t8/5 calculated by an instantaneous line heat source becomes nearly equal to that calculated by a moving point heat source.
The estimated equation for t8/5 in grooves and joints is obtained from the concept of thermal diffusion length and that in bead-on-plate.
Experiments for examining the proposed equation were done under various welding conditions. It is concluded from the examination that the estimated equation is used without serious error.
