亚温淬火工艺对25Cr2Ni3Mo钢力学性能的影响  

Effect of Intercritical Quenching Process on Mechanical Properties of 25Cr2Ni3Mo Steel

作　　者：杜凯[1] 张忠和[1] 陈炜[1] 蒋申柱 刘婉侠 朱丽君[1] 

机构地区：[1]沈阳鼓风机集团股份有限公司,辽宁沈阳110869 [2]沈阳嘉瑞电气传动有限公司,辽宁沈阳110013

出　　处：《热处理技术与装备》2016年第3期37-40,共4页Heat Treatment Technology and Equipment

摘　　要：本文对25Cr2Ni3Mo高强度低温钢进行了亚温淬火的热处理工艺试验,对不同亚温淬火温度处理后试样的常温拉伸性能和-115℃的低温冲击吸收能量值进行了测试,并应用金相显微镜、扫描电子显微镜等进行了金相显微组织、冲击断口形貌的分析。亚温淬火试样的金相组织比正常调质的均匀细小,断口形貌更好,综合力学性能更高,850℃油冷+840℃油冷的双淬火试样的综合性能最好。确保了25Cr2Ni3Mo螺栓要求的高温力学性能。In this paper, intercritical quenching process test were carried out for 25Cr2Ni3Mo steel. The tensile strength in room temperature and the impact absorbing energy at - 115 ℃ of specimens were tested after different intercritical quenching temperature. Microstructure and impact fracture morphology were an- alyzed by metallographic microscope and SEM. The structure of intercritical quenching sample is finer uni- form microstructure and better fracture morphology than normal quenched and tempered sample. The com- prehensive mechanical properties is higher and the best comprehensive performance of sample with 850 ℃ cooling at oil ＋ 840 ℃ cooling at oil are obtained, which the requiring high mechanical performance of the 25Cr2Ni3Mo bolt is ensured.

关 键 词：亚温淬火 25Cr2Ni3Mo钢 力学性能 显微组织 

分 类 号：TG142.79[一般工业技术—材料科学与工程] TG156.3[金属学及工艺—金属材料]