【摘要】 采用等温方法测定了2Cr13Ni4Mn9钢碳化物开始析出曲线与发生晶间腐蚀所需最短时间曲线,研究了该钢在不同冷速下的晶间腐蚀行为;考查了冷变形量对晶间腐蚀的影响。结果表明,该钢碳化物开始析出曲线与发生晶间腐蚀所需最短时间曲线均呈“C”形,并可分别用方程 lgt=43.883-0.116T+7.779×10^-5T² lgt=40.037-0.109T+7.673×10^-5T²来描述。由于该钢碳化物析出的孕育期短,因而晶间腐蚀敏感性强。固溶后的冷速对该钢晶间腐蚀倾向有强烈影响,冷变形对晶间腐蚀没有影响。更多还原

【Abstract】 Temperature-time diagrams showing the initiation of carbide precipitation and the minimum holding time required for the occurence of intergranular corrosion respectively were determined isothermally for steel 2Cr13Ni4Mn9. The intergranular corrosion behavior at different cooling rates are studied, as well as the effect of cold deformation on the intergranular corrosion sensibility. Results show that both curves as above are of C-shape and may be expressed respectively asDue to the short incubation period of carbide precipitation, 2 Cr 13 Ni 4 Mn 9 has the high sensibility of intergranular corrosion. But, after solubilization, the cooling rate has great effect on intergranular corrosion sensitivity while the cold deformation has no influence on it. To avoid the occurence of intergranular corrosion in 2Cr13Ni4Mn9 more rapid cooling rate will be required.更多还原