| 摘要 |
In CTEW process, U.S. Pat. No. 6,127,643, a process of reducing the residual stress during welding process is described. In this process a material is deposited at the Trailing Edge of Weld (TEW) that absorbs the heat from the solidifying weld metal. This causes the directional solidification effect in the solidifying metal and reduces the heat entering into base metals. In effect microstructure is normalized, and heat affected zone in base metals is reduced. Improvements in the process are made by determining the volume of the solidifying metal, its heat content, and heat transfer area to base metals of the weld. The ratio of heat absorbed at the TEW to heat input to weld is a constant in a specific weld, determining the improvements.
|
