分别以微米和纳米WC-12Co粉末为原料配制液态涂料,喷涂于45钢表面形成预喷涂层,再利用电接触表面强化技术对预喷涂层进行强化,获得强化层.观察了强化层的微观形貌,测定了强化层的硬度,分析了强化层的相组成和元素组成、抗热震性能.结果表明:强化层组织致密,硬度高,抗热震性能优异;强化过程中,预喷涂层与基材间发生了元素扩散,从而形成了冶金结合;与微米粉末制备的强化层相比,纳米粉末制备的强化层有更高的硬度和更好的抗热震性能.
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