摘要
对17-4PH(0Cr17Ni4Cu4Nb)马氏体不锈钢进行了3种不同条件下的时效处理。利用透射电子显微镜(TEM)技术详细分析了17-4PH不锈钢时效处理后析出相的形成过程。实验结果表明,时效条件为442℃,8h空冷时,在马氏体内部析出弥散的、尺寸小于10nm的ε-Cu、Nb6C(N)5和Nb2C(N)型亚稳相颗粒;时效条件为465℃,4h空冷时,析出尺寸为10～15nmε-Cu和稳定的NbC(N)相;时效条件为480℃,1h空冷时,析出尺寸为20～25mm的ε-Cu+NbC(N)相,且析出相NbC(N)与马氏体为共格析出,取向关系为NbC[001]//α-Fe[001]。
Aging treatment of a martensite stainless steel （17-4PH） was conducted at three different regimes： （1） 442 ℃, 8 b air cooled, （2） 465℃, 4 h air cooled and （3） 480 ℃, 1 h air cooled, respectively. The formation of aging precipitates on 17-4PH stainless steel was investigated by Transmission Electron Microscope （TEM） and Selected Area Electron Microscope （SAEM） technique. The results show that under regime （1）, ε-Cu particles and metastable phases NbBC（N）5 and Nb2C（N） with the sizes less than 10 nm were precipitated dispersedly in the martensite. Under regime （2）,ε-Cu particles and stable phase NbC（N） with about 10-15 nm in size were precipitated. Under regime （3）, the sizes of precipitated particles in the martensite became larger, and the type of precipitates were still α-Cu and NbC（N） particles with size about 20-25 nm. NbC（N） phase and martensite were coherently precipitated, and the orientation relationship between both phases was NbC[001]//α-Fe[001].
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2011年第3期654-658,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(50671042)
江苏大学科技创新团队及高级人才基金项目(07JDG032)
