After adding different contents of Al elements(2.46 wt.%,3.05 wt.%,4.24 wt.%)and readjusting the composition on the basis of 310S heat-resistant steel to obtain the heat-resistant steel cast sheet,it was hot rolled at 1 200℃with the deformation amount of 60%,and solid solution processed at 1 150℃for 30min to obtain the heat-resistant steel hot rolled sheet.The microstructure and microstructure of the hot rolled sheets with different Al contents were analyzed,and their room temperature tensile properties and 800℃tensile properties were tested.The results show that:with the increase of Al content,the grain size decreases gradually,more Al elements in the matrix solid solution,fine grain strengthening,solid solution strengthening,M7 C3 carbide and fine diffuse NiAl phase precipitation strengthening of the joint effect of the heat-resistant steel room temperature hardness,strength increases,while the elongation decreases;800℃with the increase of Al content,the strength increases and then decreases,and the elongation is about 16%.
310 S heat-resistant steelhot rollingsolution treatmentmicrostructuretensile property
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万方数据
