调质态2.25Cr-1Mo-0.25V钢的显微组织与电化学腐蚀性能  

Microstructure and electrochemical corrosion resistance of quenched and tempered 2. 25Cr-1Mo-0. 25V steel

作　　者：孔维宾[1] 秦华[1] 连景宝[1] 马喜龙[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2期58-61,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2.25Cr-1Mo-0.25V钢进行950℃淬火,再分别进行600℃和700℃回火,观察其显微组织和碳化物形貌,并测试了其耐蚀性。结果表明,2.25Cr-1Mo-0.25V钢在950℃淬火+600℃回火后具有较好的耐蚀性,而在950℃淬火+700℃回火后的耐蚀性变差,这是由于提高回火温度后大量合金碳化物析出,使合金元素流失,致使2.25Cr-1Mo-0.25V钢表面的氧化膜不能有效形成,导致耐腐蚀性下降。2. 25Cr-1Mo-0. 25 V steel was quenched at 950 ℃ and tempered at 600 ℃ and 700 ℃,respectively. The microstructure and morphology of carbide were observed and analyzed and the corrosion resistance was tested. The results show that the corrosion resistance of the 2. 25Cr-1Mo-0. 25 V steel quenched at 950 ℃ and tempered at 600 ℃ is preferable while that of the sample tempered at 700 ℃ is little worse,it is due to the more precipitation of carbides after the tempering temperature increasing which results in loss of alloy elements and no effective formation of oxide film on the steel surface,and lead to reduction of the corrosion resistance.

关 键 词：2.25CR-1MO-0.25V钢 热处理 碳化物 耐蚀性 

分 类 号：TG142.41[一般工业技术—材料科学与工程]