淬火温度对2.25Cr1Mo0.25V钢组织与耐蚀性能的影响  

Effect of quenching temperature on microstructure and corrosion resistance of 2.25Cr1Mo0.25V steel

作　　者：孔维宾[1] 秦华[1] 梁平[1] 史艳华[1] 蒋应田[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《金属热处理》2017年第4期115-118,共4页Heat Treatment of Metals

基　　金：辽宁省教育厅科学技术研究项目(LS2010098)

摘　　要：对2.25Cr1Mo0.25V钢经950、1100和1200℃淬火处理后的显微组织、表面形貌和耐腐蚀性能进行研究。结果表明,2.25Cr1Mo0.25V钢经淬火处理后的显微组织为贝氏体,随淬火温度的升高,显微组织的晶粒尺寸变大,钢中碳化物由粒状分布变为连续的条片状分布。与1100、1200℃淬火处理相比较,2.25Cr1Mo0.25V钢经950℃淬火处理后,在3.5%Na Cl溶液中的腐蚀速率降低,自腐蚀电流密度减小,电荷转移电阻增加,耐腐蚀性能提高。Microstructure,corrosion morphology and corrosion resistance of 2.25Cr1Mo0.25 V steel were researched by quenching at 950,1100 and 1200 ℃.The results show that bainite is observed after quenching treatment for 2.25Cr1Mo0.25 V steel,the grain size constantly becomes bigger with the temperature increasing,granular carbides precipitated in based metal change into continuous strip form distribution.Comparison with 1100,1200 ℃ quenching treatment,corrosion rate and corrosion current decrease,charge transfer resistance increases at950 ℃ and corrosion resistance is improved for 2.25Cr1Mo0.25 V steel after quenching treatment.

关 键 词：淬火 2.25Cr1Mo0.25V钢 耐蚀性 晶粒 

分 类 号：TG156[金属学及工艺—热处理]