A deformation heat treatment process for improving the intergranular corrosion resistance of austenitic stainless steel
A technology of austenitic stainless steel and deformation heat treatment, which is applied in the field of deformation and heat treatment of metal materials to achieve uniform deformation and excellent intergranular corrosion resistance
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Embodiment 1
[0032] Cross tensile deformation of austenitic stainless steel rods or pipes (such as figure 1 Shown), the cross tensile deformation is 3%, 7%, 14%, 21%. Subsequently, the deformed sample was annealed at 1050°C for 5 minutes in a heat treatment furnace, and then taken out for water quenching after heat preservation. The specific process parameters are shown in Table 2. The proportion of low ΣCSL inside the sample after deformation heat treatment changes with the change of cross tensile deformation. The specific test results are shown in Table 2.
[0033] The samples after deformation heat treatment were inlaid with epoxy resin and curing agent to prepare standard electrochemical corrosion samples. at room temperature in 0.5M H 2 SO 4 Potentiodynamic reactivation (EPR) experiments and polarization curve measurements were carried out on the samples in +0.01M KSCN solution. The reactivation current ratio and self-corrosion potential changed with the change of cross tensile def...
Embodiment 2
[0037] Cross tensile deformation of austenitic stainless steel rods or pipes (such as figure 1 Shown), the amount of cross tensile deformation is selected as 5%. Subsequently, the deformed samples were annealed in a heat treatment furnace. The annealing temperatures were 1000°C, 1050°C, 1100°C and 1150°C respectively, and the annealing time was 5 minutes. After deformation heat treatment, the low ΣCSL ratio inside the sample changes with the annealing temperature. The specific test results are shown in Table 3.
[0038]The samples after deformation heat treatment were inlaid with epoxy resin and curing agent to prepare standard electrochemical corrosion samples. at room temperature in 0.5M H 2 SO 4 Potentiodynamic reactivation (EPR) experiments and polarization curve measurements were performed on the samples in +0.01M KSCN solution. The reactivation current ratio and self-corrosion potential changed with the annealing temperature. Table 3 lists the reactivation current ra...
Embodiment 3
[0043] Use an electronic tensile testing machine to carry out cross tensile deformation on austenitic stainless steel rods or pipes, and the amount of cross tensile deformation is selected as 5%. Subsequently, the deformed samples were annealed in a heat treatment furnace. The annealing temperature was 1050°C, and the annealing time was 5 min, 10 min, and 30 min. The low ΣCSL ratio inside the sample after deformation heat treatment changes with the annealing time. The specific test results are shown in Table 4.
[0044] The samples after deformation heat treatment were inlaid with epoxy resin and curing agent to prepare standard electrochemical corrosion samples. at room temperature in 0.5M H 2 SO 4 Potentiodynamic reactivation (EPR) experiments and polarization curve measurements were performed on the samples in +0.01M KSCN solution. The reactivation current ratio and self-corrosion potential changed with the annealing time. Table 4 lists the reactivation current ratio and...
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