Residual stress distribution in synthetic diamond grains brazed with Ni-Cr brazing filler metal

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Pu Meng
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Abstract

The distribution of residual stress in three different directions of synthetic diamond grains brazed with Ni-Cr brazing filler metal having different embedding depth was measured by Raman spectroscopy to investigate the influence of embedding depth on residual stress of diamond-metal joints and optimize the embedding depth of synthetic diamond grains in brazed synthetic diamond tools. The results show that the residual stress is stable without remarkable gradient in the core zones of brazed synthetic diamond grains. However, in the region of both end of central axis, the margin region of the central plane and the margin region of the section plane between the brazed synthetic diamond grains and the surface of Ni-Cr brazing filler metal, the stress distribution gradient is rather great. The maximum tensile stress always exists in the margin region of the section plane and it has the most important effect on the mechanical property of brazed synthetic diamond grains. The embedding depth of synthetic diamond grains in brazed synthetic diamond tools is optimized at 40–50% based on the maximum tensile stress and the requirement of machining process.
Ni-Cr钎料钎焊合成金刚石晶粒残余应力分布
采用拉曼光谱法测量了不同埋深Ni-Cr钎料金属钎焊后合成金刚石颗粒在3个不同方向上的残余应力分布,研究了埋深对金刚石-金属接头残余应力的影响,优化了人工金刚石颗粒在钎焊合成金刚石工具中的埋深。结果表明:在人造金刚石晶粒钎焊核心区残余应力稳定,无明显梯度;然而,在中心轴两端区域、中心平面边缘区域和人工金刚石晶粒与Ni-Cr钎料表面之间的切面边缘区域,应力分布梯度较大。最大拉应力始终存在于切割平面边缘区域,对钎焊合成金刚石晶粒的力学性能影响最大。根据最大拉伸应力和加工工艺要求,优化了人造金刚石钎焊刀具中人造金刚石颗粒的埋深为40 ~ 50%。
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来源期刊
Materia-rio De Janeiro
Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
25.00%
发文量
51
审稿时长
6 weeks
期刊介绍: All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.
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