期刊
VACUUM
卷 97, 期 -, 页码 36-43出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2013.04.006
关键词
Surface mechanical attrition treatment (SMAT); Boronizing; Iron borides; Alloy borides; Diffusion; Duplex treatment
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi
The role of surface mechanical attrition treatment (SMAT) on pack boronizing of AISI H11 type tool steel is addressed. SMAT induced plastic deformation, enabled nanocrystallization at the surface, reduced the grain size and increased the volume fraction of non-equilibrium gain boundaries, increased the accumulation of defects and dislocations at the grain boundaries and within the grains. These features helped to promote the diffusion of boron during boronizing and increased the case depth and hardness of the bonded layer. Duplex treatment on SMATed H11 steel samples helps to achieve a higher case depth when compared to the single stage treatment. The findings of the study suggest that SMAT can be used as a pretreatment for boronizing of H11 tool steel. (C) 2013 Elsevier Ltd. All rights reserved.
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