engleski

INFLUENCE OF POST WELD HEAT TREATMENT ON P91/T91 STEEL WELD JOINTS TOUGHNESS

In this paper the influence of heat treatment in coarse – grained (CG HAZ) and in fine – grained heat affected zone ( FG HAZ) had been tested on P91 steel. The steel is intended for work in higher temperatures in heat plants. Heat treatment after welding is needed since welding significantly lessens mechanical properties, including toughness. Results have shown that heat treatment on temperature of 760 °C over 2 hours has a good effect on mechanical properties as a result of hardness decrease. Research has been done on samples simulated on the heat cycles simulator Smitweld TCS 1405.....

P91/T91steel; coarse-grained heat affected zone (CG HAZ); fine-grained heat affested zone (FG HAZ); PWT

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