Mechanical Properties And Intergranular Corrosion Resistance Of High Aluminum304,316L Steels And Effect Of Hot-rolling Temperature And Deformation On Action Mechanism

High-aluminum304and316L stainless steels were prepared in vacuum arc furnace and intermediate frequency coreless induction melting furnace, then rolled on hot-roller by our team. Research shows that these alloys had excellent corrosion resistance, while the mechanical properties did not decrease. The plates of the stainless steels prepared under the condition of industrial production play an important role in the research, development and application of these modified austenitic stainless steels whether they can keep excellent mechanical properties and intergranular corrosion resistant performance. Based on this, hot-rolled plates of high-aluminum304and316L stainless steels were prepared with different temperature and deformation, mechanical properties and intergranular corrosion resistant performance of these steels with1.5%and2%aluminium content were investigated, the mechanism of hot rolling temperature and deformation on the mechanical properties and corrosion performance was revealed. The main conclusions are as follows.(1) The hardness and strength of304stainless steels were gradually enhanced with the increasing weight percentage of Al. The strength of the alloys with different Al content increased as the hot-rolling temperature rose. Plasticity of the alloys with1.5%Al content reduced, while the intergranular corrosion resistance essentially unchanged. Plasticity of the alloys with2%Al content firstly elevated then decreased, while the intergranular corrosion resistance increased.(2) The hardness and strength of304stainless steels increased with the increasing weight percentage of Al. As the hot-rolling temperature increased, the hardness and strength of alloys with1.5%Al content remain unchanged, and the plasticity increased while the intergranular corrosion resistance decreased. The hardness, strength and intergranular corrosion resistance of the alloys with2%Al content firstly elevated then decreased, while the plasticity decreased.(3) As the deformation increased, the hardness and yield strength of304stainless steels with different Al content had little change. With the increasing deformation, the tensile strength of the alloys with1.5%Al content did not change, the plasticity increased, and the intergranular corrosion resistance decreased firstly then increased. The tensile strength of the alloys with2%Al content raised firstly then reduced, the plasticity decreased, and the intergranular corrosion resistance increased. (4) With the deformation increasing, the strength of316L stainless steels had little change, the hardness and plasticity firstly elevated then decreased, while the intergranular corrosion resistance reduced firstly then raised. The hardness, strength and intergranular corrosion resistance of the alloys with2%Al content increased firstly then decreased, and the plasticity increased.