采用放电等离子烧结技术制备了KF-Ni60B镍基自熔合金,通过硬度、密度测试,研究了烧结温度、保温时间和烧结压力对烧结体性能的影响,并对烧结工艺进行了优化.结果表明:烧结温度对该合金性能的影响最大,烧结压力和时间的影响次之;在65 MPa压力下,经870℃烧结15 min的Ni60B自熔合金性能最佳,硬度为64.22 HRC,密度为7.713 g·cm-3;烧结后的合金组织为在γ-Ni固溶体基体上均匀分布着铬、铁的碳化物、硼化物等硬质相,晶粒均匀细小.
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