放电等离子烧结温度对ZK61镁合金组织及力学性能的影响

发布时间：2018-04-30 04:31

本文选题：放电等离子烧结 + ZK镁合金　；参考：《材料热处理学报》2017年03期

【摘要】：以ZK61合金粉末为原料,通过放电等离子烧结的方法制备了ZK61生物镁合金块体,研究了不同烧结温度对合金块体微观组织和力学性能的影响。结果表明:制备出的ZK61合金块体内部结构致密,组织分布均匀,晶粒细小,块体致密度随烧结温度逐渐提高,在520℃时达到99.24%;随着烧结温度的升高,粉末颗粒间原子扩散作用增强,ZK61合金块体的力学性能也逐渐提高,在烧结温度为520℃时综合性能最好,其中显微硬度由370℃时的69.2 HV增加到79.3 HV,抗压强度和抗弯强度也获得最大值,分别为304 MPa和94.7 MPa,压缩率逐渐变大,韧性提高。
[Abstract]:ZK61 magnesium alloy block was prepared by spark plasma sintering with ZK61 alloy powder as raw material. The effect of different sintering temperature on Microstructure and mechanical properties of the alloy block was studied. The results show that the prepared ZK61 alloy block has a dense structure, uniform distribution, fine grain and the density of the block with the sintering temperature. When the sintering temperature rises, the diffusion of atoms between particles is enhanced and the mechanical properties of ZK61 alloy blocks are increased gradually with the increase of sintering temperature. The composite properties are best at the sintering temperature of 520 C, and the microhardness is increased from 69.2 HV to 79.3 HV at 370 C, and the compressive strength and bending strength are also the most. The maximum value is 304 MPa and 94.7 MPa respectively, and the compression ratio increases and toughness increases.

【作者单位】：太原理工大学材料科学与工程学院;先进镁基材料山西省重点实验室;
【基金】：国家自然科学基金(51305292)
【分类号】：TG146.22

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