0Cr13Ni4Mo马氏体不锈钢表层的喷丸强化

金属学报

2005, Vol. 41

Issue (1): 28-

论文

本期目录 | 过刊浏览

0Cr13Ni4Mo马氏体不锈钢表层的喷丸强化

马素媛陈瑞贺笑春李家宝郝学卓

中国科学院金属研究所沈阳材料科学国家(联合)实验室; 沈阳110016

Shot Peening Induced Strengthening Of The Surface Layer Of Martensite Stainless Steel 0Cr13Ni4Mo

MA Suyuan; CHEN Ri; HE Xiaochun; LI Jiabao;HAO Xuezhuo

Shenyang National Laboratory for Materials Science; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016

引用本文:

马素媛; 陈瑞; 贺笑春; 李家宝; 郝学卓 . 0Cr13Ni4Mo马氏体不锈钢表层的喷丸强化[J]. 金属学报, 2005, 41(1): 28-.
, , , , . Shot Peening Induced Strengthening Of The Surface Layer Of Martensite Stainless Steel 0Cr13Ni4Mo[J]. Acta Metall Sin, 2005, 41(1): 28-.

全文: PDF(213 KB)

摘要: 对经1000℃正火和600℃回火的水轮机过流部件用钢0Cr13Ni4Mo进行喷丸处理，测量了喷丸影响层的显微硬度、X射线衍射线半高宽和屈服强度等参量的沿层深分布, 并计算了相应的晶块尺寸、微观应变和位错密度等微观结构参量.结果表明，该影响层以显微硬度和屈服强度表征的组织强化效应显著,显微硬度和屈服强度提高是由于晶块细化、微观应变和位错密度增大造成的。喷丸影响层不同部位的显微硬度与条件屈服点之比约为3.37；半高宽与显微硬度之间存在两段式线性关系Hw=2.07×10-3HV－3.47 (HV<2835MPa)和Hw=1.14×10-3HV－0.81 (HV>2835MPa)，条件屈服点与位错密度的平方根之间存在Bailey-Hirsch线性关系： =551+16.2×10-4 。

关键词 ：马氏体不锈钢, 喷丸影响层, 组织强化

Abstract：A low carbon martensite stainless steel 0Cr13Ni4Mo normalized at 1000℃ and tempered at 600℃, used in the guide stream assemblies of water turbine, was treated with shot peening. The depth distributions of microhardness, half-width value of X-ray diffraction profiles and yield strength in the shot-peening affected layer were measured. Correspondingly, the depth distributions of microstructure parameters, such as subgrain size, microstrain and dislocation density, in this layer were calculated. The experimental results indicate that the structure strengthening charactered by microhardness and yield strength is prominent. The subgrain size decreases, and the microstrain and dislocation density increase in the shot-peening affected layer. As a result, the microhardness and yield strength in this layer increase. The ratios of microhardness to proof stress, , are all about 3.37 in different depth of the affected layer. The relation of the half-width value, Hw, and microhardness, HV, in this layer is linear, which is composed of two beelines: if HV<2835MPa, Hw=2.07×10-3HV－3.47, and if HV>2835MPa, Hw=1.14×10-3HV－0.81. The relation of the proof stress, , and square root of dislocation density, , in this layer is also linear: =551+16.2×10-4 .

Key words： martensite stainless steel shot peening affected layer structure strengthening

收稿日期: 2004-03-17

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