Sinter Fe-Cu-WC based metal bonding agent by using microwave pressureless method
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摘要:
分别采用常规无压烧结和微波无压烧结法，以Fe、Cu、Sn等金属粉以及WC粉作为原料制备金属烧结体，研究不同烧结工艺对金属烧结体的微观组织形貌、致密度和抗弯强度的影响。结果表明：对比常规无压烧结，微波无压烧结可提高金属烧结体的致密度及力学性能；当烧结温度为900℃时，致密度和抗弯强度均达到最大，分别为90.6%、93.9%和753 MPa、816 MPa；通过样品微观形貌分析，微波无压烧结可以使烧结体元素分布更均匀，降低烧结体的孔隙率。在达到同等级力学性能的前提下，微波无压烧结可以降低烧结温度，避免高温损伤金刚石强度。
Abstract:Metal powders, such as Fe, Cu, Sn and WC, were used to prepare metal bond by conventional and microwave pressureless-sintering. The effects of different sintering processes on the densification and impact toughness of metal bonds were studied. SEM was used to observe the microstructure of the bond. Research indicates that compared with conventional pressureless sintering, microwave pressureless sintering improves the relative density and mechanical properties of the metal bond. The relative density and bending strength of the two bonds both reach the maximum at 900℃, which is 90.6%, 93.9% and 753 MPa, 816 MPa, respectively. It can be seen from the microstructure that microwave pressureless sintering can make the elements uniformly distributed and reduce the porosity of the bond. In addition, at the same level of performance, microwave pressureless sintering can reduce sintering temperature, thus effectively avoiding its damages to diamond strength.
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Key words:
- microwave pressureless sintering /
- diamond tool /
- relative density
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