'a method for improving toughness and cold cracking resistance at heat affected zone (haz) on weld products by correlating the microstructure and mechanical properties of the materials'

摘要

The present invention relates to a method for improving toughness and cold cracking resistance at heat affected zone (HAZ) on weld products by correlating the microstructure and mechanical properties of the materials, comprising the steps of simulating thermal cycles by heating and cooling the sample adapting a thermocouple welded at the centre of the sample; adjusting a distance between two copper wedge shaped grips to obtain a desired cooling time for the heated sample; and machining the simulated sample for testing impact toughness at room temperature.