In order to stabilize and optimize industrial production process,the microstructure and mechanical properties of wire rod of high-chromium ferrite stainless steel 446 (/%:0.035C,0.50Mn,0.025P,0.003S,0.49Si,25.25Cr,0.030N) were researched in different annealed processes. The results showed that the optimum mechanical properties were achieved for the 446 wire rod after annealing at 800 ℃ for 4.5 h,with tensile strength of 540 MPa,yield strength of 377 MPa,area reduction of 86.5% and grain size rate of 7.5. As the grain size rate influenced less in trial temperature range of 780-880 ℃,the coarse crystal of high-chromium ferrite stainless steel was hard to be refined by annealing process. However,the grain would be growing extremely when the annealing temperature exceeded 920 ℃. The grain coarsening of 446 wire rod can be restrained effectively and the grain size rate can reach 10.0 with controlling the mass percent of N for 0.08%-0.20%.
LIN Ren-Gan, XU Hui-Song. , {{custom_author.name_en}}et al.
Microstructure and property for 446 wire rod of high chromium ferrite stainless steel[J]. Iron and Steel, 2018, 53(10): 85-89 https://doi.org/10.13228/j.boyuan.issn0449-749x.20180093
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