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Preparation method of polycrystalline diamond
The invention provides a preparation method of polycrystalline diamond, and relates to the technical field of polycrystalline diamond. The preparation method of the polycrystalline diamond comprises the following steps that diamond micro-powder is sintered in a sealed environment after being subjected to preheating treatment and pre-pressing treatment, and the preheating treatment temperature is larger than or equal to 670 DEG C. Preheating treatment is carried out before sintering, gas and other impurities in diamond micro-powder are removed, then the temperature gradient during sintering of a wire drawing die blank is reduced through prepressing, the bad problems of uneven sintering, cracks and the like are avoided, re-entering of the gas and other impurities can be reduced by sintering in a closed environment, and the service life of the wire drawing die blank is prolonged. The sintering uniformity of the polycrystalline diamond is improved; and the generation of defects such as cracks is reduced.
本发明提供一种聚晶金刚石的制备方法，涉及聚晶金刚石技术领域。本发明提供的聚晶金刚石的制备方法，包括以下步骤：将金刚石微粉经过预热处理和预压处理后，在密封环境下进行烧结，所述预热处理的温度≥670℃。通过在烧结前进行预热处理，去除金刚石微粉中的气体其他杂质，再通过预压减小拉丝模坯烧结时的温度梯度，避免烧结不均和裂纹等不良问题的产生，并且在密闭环境中进行烧结能够减少气体等杂质的再次进入，提高聚晶金刚石的烧结均匀性并降低裂纹等缺陷的产生。
Preparation method of polycrystalline diamond
The invention provides a preparation method of polycrystalline diamond, and relates to the technical field of polycrystalline diamond. The preparation method of the polycrystalline diamond comprises the following steps that diamond micro-powder is sintered in a sealed environment after being subjected to preheating treatment and pre-pressing treatment, and the preheating treatment temperature is larger than or equal to 670 DEG C. Preheating treatment is carried out before sintering, gas and other impurities in diamond micro-powder are removed, then the temperature gradient during sintering of a wire drawing die blank is reduced through prepressing, the bad problems of uneven sintering, cracks and the like are avoided, re-entering of the gas and other impurities can be reduced by sintering in a closed environment, and the service life of the wire drawing die blank is prolonged. The sintering uniformity of the polycrystalline diamond is improved; and the generation of defects such as cracks is reduced.
本发明提供一种聚晶金刚石的制备方法，涉及聚晶金刚石技术领域。本发明提供的聚晶金刚石的制备方法，包括以下步骤：将金刚石微粉经过预热处理和预压处理后，在密封环境下进行烧结，所述预热处理的温度≥670℃。通过在烧结前进行预热处理，去除金刚石微粉中的气体其他杂质，再通过预压减小拉丝模坯烧结时的温度梯度，避免烧结不均和裂纹等不良问题的产生，并且在密闭环境中进行烧结能够减少气体等杂质的再次进入，提高聚晶金刚石的烧结均匀性并降低裂纹等缺陷的产生。
Preparation method of polycrystalline diamond
一种聚晶金刚石的制备方法
WANG PEICAO (author) / SHANG QIUYUAN (author) / ZHENG XINJIE (author) / ZHAO DONGPENG (author) / GAO HUA (author)
2024-04-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
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POLYCRYSTALLINE DIAMOND COMPACT AND PREPARATION METHOD THEREFOR
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