CAJ | 학술논문

在传统的热压烧结金刚石工具制品中,添加一定量的 Ni,可以明显提高胎体的强度以及韧性,而在自由烧结所制的胎体中,却显示出不同的效果。实验在其它烧结工艺不变条件下,在以 M粉为主要粘结剂的金刚石工具胎体中添加羰基 Ni,开展羰基 Ni 对自由烧结胎体性能影响的试验研究。试验结果表明：随着胎体中 Ni含量的依次增加,胎体的相对密度、洛氏硬度先提高后下降,在 Ni 含量为5 wt.%附近出现拐点,而胎体的抗弯强度却一直呈下降趋势；同时,胎体内晶粒由细变粗,且胎体的韧性逐渐减弱,脆性逐渐增强。
재전통적열압소결금강석공구제품중,첨가일정량적 Ni,가이명현제고태체적강도이급인성,이재자유소결소제적태체중,각현시출불동적효과。실험재기타소결공예불변조건하,재이 M분위주요점결제적금강석공구태체중첨가탄기 Ni,개전탄기 Ni 대자유소결태체성능영향적시험연구。시험결과표명：수착태체중 Ni함량적의차증가,태체적상대밀도、락씨경도선제고후하강,재 Ni 함량위5 wt.%부근출현괴점,이태체적항만강도각일직정하강추세；동시,태체내정립유세변조,차태체적인성축점감약,취성축점증강。
In the manufacturing process of traditional hot pressing sintering diamond tools, the strength and toughness of the matrix of diamond tools can be obviously increased when a certain amount of Ni is added,but different effects are displayed in the matrix of those diamond tools by free sintering.An experimental study is conducted to test the in-fluence of nickel carbonyl on the performance of free sintering diamond tool matrix under the same sintering process by adding nickel carbonyl into the diamond tool matrix,of which the key agglomerant is M powder.The test result shows that as the Ni content in matrix increases,the relative density and Rockwell hardness of it get increased at the be-ginning and then declined.An inflection point arises when the content of Ni is around 5 wt.%.However,the flexural strength of the matrix keeps declining.Meanwhile,the grains inside the matrix change from fine to coarse,the toughness of the matrix keeps weakening and the brittleness of it get increased gradually.