THE EFFECT OF POST WELD HEAT TREATMENT IN WELD REPAIRED COMPONENTS OF AISI 410 MATERIALS

摘要

The aim of this work is to study the effect of Post Weld Heat Treatment [PWHT] on the hardness and tensile strength of high Chromium steel [AISI-410] used in aircraft engines. Two types of PWHT and two types of specimens were used to simulate build-up welding and crack repair conditions; each type of these specimens having different parameters. The results show that the first type of PWHT reduces the hardness in the heat affected zone (HAZ) by about 15% of the hardness of the as welded specimen and improves the tensile strength. The second type of PWHT reduces the hardness in the HAZ by about 40% but decreases the tensile strength by about 10%.