GX2CrNiMoN22-5-3不锈钢的固溶处理工艺研究
Study on Solution Treatment Process of GX2CrNiMoN22-5-3 Stainless Steel
李新跃1,2, 罗 宏1,2, 喻兰英1,2
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作者单位：(1.四川理工学院 材料与化学工程学院, 四川 自贡 643000; 2.材料腐蚀与防护四川省高校重点实验室, 四川 自贡 643000)
中文关键字：GX2CrNiMoN22-5-3不锈钢； 固溶处理； 金相； 维氏硬度； Tafel极化曲线
英文关键字：GX2CrNiMoN22-5-3 stainless steel; solution treating; metallographic; Vickers hardness; Tafel polarization curve
中文摘要：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。
英文摘要：The samples of GX2CrNiMoN22-5-3 stainless steel were heat-treated at 980 ℃, 1040 ℃, 1070 ℃ or 1100 ℃for 30 min， and then cooled by water. The microstructure was observed and Vickers hardness was measured, and the Tafel polarization curve in 3.5%NaCl solution was tested. The results show that the content of ferrite phase and the Vickers hardness decreases with the temperature increasing; the content of ferrite and austenite is appropriated, the corrosion resistance is best at 1070 ℃. The optimization solution treatment process is heating at 1070 ℃ for 30 min, cooling by water.