EXPERIMENTAL RESEARCH INTO INCREASE OF WORKING EFFICIENCY OF DIAMOND DRILLING BITS
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摘要: 根据实验研究结果建议从金刚石镀膜、胎体添加稀土元素两个方面来提高金刚石的热稳定性、胎体对胎体的包镶能力及其使用性能.这两个措施为实现以铁代替胎体材料中的钴创造了有利条件.Abstract: In this paper, two technical methods: the diamond coating and the addition of rare earth elements to matrix materials, are proposed, in line with the results derived from the experimental research, to improve the thermal stability of diamonds, the cohesion of matrix materials to the diamonds and their corresponding performance. These two technical methods can serve as favorable conditions for the substitution of Fe for Co in the matrix material.
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图 1 从不同温度烧结制品中回收的镀膜与未镀膜金刚石强度对比
×.镀覆Ti-Cr金刚石; ○.镀覆Ni-W-B金刚石; △.镀覆Ni-Fe-B金刚石; ●.未镀膜金刚石
Fig. 1. Comparison of strength of metallized diamonds with nonmetallized diamonds from different temperature hot-pressed and sintered diamond products
图 2 镀覆金属的金刚石的X射线衍射分析
a.镀覆Ni-Fe-B; b.镀覆Ni-W-B; c.镀覆Ti-Cr
Fig. 2. XRD of diamonds metallized with Ni-Fe-B (a), Ni-W-B (b) and Ti-Cr (c)
图 3 镀覆Fe (3), Ni (1), Co (2) 金刚石的DTA-7曲线
Fig. 3. DTA-7 diagram of diamonds metallized with Fe (3), Ni (1) and Co (2)
图 4 纯Fe (1)、纯Co (3)、加稀土Fe (2) 的DTA-7曲线
Fig. 4. DTA-7 diagram of pure Fe (1), pure Co (3) and Fe adding rare earth element (2)
图 5 纯Ni (1)、纯Co (3)、加稀土Ni (2) 的DTA-7曲线
Fig. 5. DTA-7 diagram of pure Ni (1), pure Co (3) and Ni adding rare earth element (2)
图 6 35%Fe基复合粉(1)、35%Co基复合粉(3) 和加稀土的35%Fe基复合粉(2) 的DTA-7曲线
Fig. 6. DTA-7 diagram of 35% Fe-based composites (1), 35% Co-based composites (3) and 35%Fe-based composites adding rare earth element (2)
表 1 胎体对不同类型金刚石包镶能力的测量结果
Table 1. Measured results of cohesive ability of matrix materials to diamonds metallized with different elements
表 2 添加稀土元素铈(Ce) 的Co基和Fe基胎体性能测量结果
Table 2. Measured results of Co-based and Fe-based composites adding rare earth element Ce
表 3 添加稀土元素镧(La) 的Co基和Fe基金刚石复合材料性能测量结果
Table 3. Measured results of Co-based and Fe-based diamond composites adding rare earth element La
表 4 不同类型钻头钻进岩石试验结果
Table 4. Tested results of rock drilling with different type diamond bits
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[1] 段隆臣. 新型镀覆金刚石工具的研制[D]. 武汉: 中国地质大学, 1997. [2] ТАН Фуньлинь, Дуан Лунцэн, ЯН Кайхуа. Экспериментальные исследования металлизированных алмазных породоразрушающих инструментов [J]. Сборник научных трудов ВИТРа(Методика и техника разведки, 1999(9-10): 96~111. [3] 邹庆化. 铁基稀土金刚石工具胎体材料[D]. 武汉: 中国地质大学, 1999. [4] 金属材料物理性能手册编委会. 金属材料物理性能手册(第一册)[M]. 北京: 冶金工业出版社, 1987. -
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