Study on Deformation and Cracking Behavior of TP347H and Super304H Heat Resistant Steel during Thermal Fatigue
Based on the test method for thermal fatigue of metals with rectangular plate specimen(HB 6660-2011),the deformation behavior of the bottom dimension and the crack morphologies in the V mouth of TP347H and Super304H heat resistant steels in the as-supplied state,the solid solution state under the same heat treatment condition of the as-supplied state and the aging state samples during the thermal fatigue process were compared and analyzed.The results show that the deformations of Super304H steel in three states are less than that of TP347H steel after thermal fatigue test,the V mouth of TP347H shows relatively large passivation,and the aging sample has the largest passivation and the shortest crack.The observation of the V mouth shows that the damage degree of Super304H steel is weaker than that of TP347H steel.The cracking mode is mainly along the crystal cracking,but also part of the transgranular cracking.
万方数据
维普
