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基于Ag-Cu-Ti釬料的超高頻感應(yīng)連續(xù)釬焊金剛石界面結(jié)構(gòu)及殘余應(yīng)力
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江蘇理工學(xué)院,南京航空航天大學(xué),南京航空航天大學(xué),江蘇理工學(xué)院

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TG401；TG454

基金項(xiàng)目:

國(guó)家自然科學(xué)基金（51275231）; 江蘇省“六大人才高峰”支持計(jì)劃（2013-ZBZZ-029）; 江蘇省高校自然科學(xué)研究（14KJB460011）


Interfacial Micrustructure and Residual Stress of Diamond Continuous Brazed with Ultra-high Frequency induction Using Ag-Cu-T
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Jiangsu University of Technology,Nanjing University of Aeronautics and Astronautics,Nanjing University of Aeronautics and Astronautics,Jiangsu University of Technology

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    摘要:

    采用Ag-Cu-Ti合金釬料基于超高頻感應(yīng)連續(xù)釬焊工藝實(shí)現(xiàn)了金剛石磨粒與大尺寸鋼基體的連接，借助掃描電鏡（SEM）對(duì)不同掃描速度條件下釬焊的金剛石界面微觀結(jié)構(gòu)形貌進(jìn)行觀察分析，采用Raman光譜對(duì)釬焊后金剛石的殘余應(yīng)力狀態(tài)進(jìn)行分析。結(jié)果顯示：超高頻感應(yīng)連續(xù)釬焊金剛石表面TiC晶體的生成處于非平衡態(tài)的過程，TiC晶體形貌偏離理想的正八面體，呈球狀和島狀。釬料層內(nèi)部出現(xiàn)富Cu枝晶組織，而在45鋼基體表層形成了馬氏體組織。釬焊后的金剛石磨粒頂部受壓殘余壓應(yīng)力，最大值為500MPa，磨粒底部受到殘余拉應(yīng)力，最大值為150MPa，這中分布趨勢(shì)與傳統(tǒng)真空爐中釬焊方法獲得的殘余應(yīng)力分布剛好相反。

    Abstract:

    Continuous brazing with ultra-high frequency induction was proposed to braze the monocrystalline diamond grains using Ag-Cu-Ti filler alloy. The interfacial microstructure and residual stress of the brazed diamond was investigated and analogized by scanning electron microscopy (SEM) and Raman spectroscope. The experimental results revealed the fact that the formation of TiC crystal was in non-equilibrium state during continuous brazing with ultra-high frequency induction. The morphology of the formed TiC appared granular and island-like structure, far away from the equilibrium state. A little dendrite with Cu-riched was observed in filler alloy, and martensite was formed near the surface of steel substrate. The maximum compressive stress in the brazed diamond was 500MPa at the top, while the maximum tensile stress is 150MPa at the bottom. This result was opposite to the residual stress distribution obtained by furnace brazing.

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李奇林,蘇宏華,徐九華,雷衛(wèi)寧.基于Ag-Cu-Ti釬料的超高頻感應(yīng)連續(xù)釬焊金剛石界面結(jié)構(gòu)及殘余應(yīng)力[J].稀有金屬材料與工程,2016,45(12):3250~3254.[Li Qilin, Su Honghua, Xu Jiuhua, Lei Weining. Interfacial Micrustructure and Residual Stress of Diamond Continuous Brazed with Ultra-high Frequency induction Using Ag-Cu-T[J]. Rare Metal Materials and Engineering,2016,45(12):3250~3254.]
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  • 收稿日期:2014-09-25
  • 最后修改日期:2014-11-24
  • 錄用日期:2014-12-25
  • 在線發(fā)布日期: 2017-02-06
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