时效工艺对含铜高纯钢显微组织的影响  

INFLUENCE OF AGING PROCESS ON MICROSTRUCTURE OF HIGH PURITY STEEL BEARING COPPER

作　　者：安治国[1] 刘宗昌[1] 任慧平[1] 王海燕[1] 王玉峰[1] 

机构地区：[1]内蒙古科技大学材料科学与工程学院,包头014010

出　　处：《理化检验（物理分册）》2005年第11期549-552,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家自然科学基金资助项目(50361001)

摘　　要：采用JEM-2010型高分辨电子显微镜和Quanta 400型扫描电子显微镜,对经时效处理后的含铜高纯钢进行了组织观察,并研究了时效温度和保温时间对含铜高纯钢显微组织和硬度的影响,分析了时效工艺与硬度、显微组织之间的对应关系.结果表明,时效温度越高,达到时效硬度峰值所需的时间越短,且峰值硬度也随之下降.550℃时效峰处,铁素体晶粒中分布着大量的铜原子富集区,颗粒尺寸4～20nm,其结构仍为体心立方晶格.650℃时效时,富铜析出物优先在铁素体晶界处析出,随着时效时间的延长,富铜析出物不断粗化长大.High purity steel bearing copper has excellent performance such as high strength and high toughness after aging. By means of JEM-2010 HREM and Quanta 400 SEM, the microstructure during aging treatment in high purity steel bearing copper was observed. The effects of the aging temperature microstructure and holding time on the microstructure and hardness of the high purity steel bearing copper were investigated. The corresponding relationships between aging process and hardness, microstructure were analyzed after testing hardness （HV） and observing the microstructure of the aged steel. The result indicated that when aging temperature increasing, the holding time arriving at aging peak is shorter and the aging peak hardness is lower. At aging peak of 550℃ aging treatment, there are a large numbers of Cu-rich clusters distributed in ferrite matrix, the size of which is 4-20nm and the structure was body center cube crystal lattice. At 650℃ aging, the rich-copper particles are precipitated in the ferrite grain boundary and coarsen with holding time increasing.

关 键 词：含铜高纯钢 固溶 显微组织 时效 

分 类 号：TG115[金属学及工艺—物理冶金]