在不同的固溶退火温度(980、1010、1040、1070和1100℃)分别保温30 min,冷却方式为水冷。观察其显微组织,测定其显微硬度,测定了经不同固溶处理后在3.5%的NaCl溶液中的Tafel极化曲线。结果表明:随固溶退火温度的升高,铁素体量减少,显微硬度降低;在1070℃时,铁素体和奥氏体相当,显微硬度最小,腐蚀倾向最小。固溶处理最优工艺为1070℃×30 min,水冷。 At different solution annealing temperature (980, 1010, 1040, 1070 and 1100 ℃), respectively, for 30 min, the cooling method is water-cooled. The microstructure was observed and the microhardness was measured. The Tafel polarization curve in 3.5% NaCl solution after different solution treatment was measured. The results show that with the increase of solution annealing temperature, the amount of ferrite decreases and the microhardness decreases. At 1070 ℃, the ferrite and austenite are equivalent, the microhardness is the smallest and the corrosion tendency is the least. The optimal solution treatment process is 1070 ℃ × 30min, water-cooled.