张锋刚,朱小鹏,雷明凯

• 1:陕西理工大学材料科学与工程学院
• 2:大连理工大学材料科学与工程学院

摘要(Abstract)：

利用能量密度3~34 J/cm~2、脉冲宽度180 ns的强流脉冲电子束(IPEB)对WC-Ni硬质合金进行了表面辐照处理。采用SEM、XRD、EPMA和显微硬度等方法研究了IPEB辐照WC-Ni硬质合金表面硬化行为。结果表明,IPEB辐照使WC-Ni硬质合金表面发生快速重熔和Ni粘结相的择优烧蚀,导致α-WC相向β-WC_(1-x)和α-W_2C亚稳相转变;IPEB辐照WC-Ni硬质合金表面出现硬化与软化现象,表面硬化归因于硬质合金表面致密化、α-W_2C亚稳相的形成、Ni粘结择优烧蚀,而硬质合金表面软化则源于表面Ni含量的增加、大量β-WC_(1-x)相的形成以及表面烧蚀孔与微裂纹等缺陷的形成。

关键词(KeyWords)： 强流脉冲电子束;WC-Ni硬质合金;显微硬度;表面硬化

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学基础研究计划项目(2015JQ5193);; 陕西省教育厅科研基金(16JK1138);; 陕西理工学院科研基金(SLGQD14-12)

作者(Author): 张锋刚,朱小鹏,雷明凯

DOI: 10.13289/j.issn.1009-6264.2016-X279

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