采用复合电沉积方法,在碳钢表面制备质量分数为Fe 38.3%、W 52.7%、ZrO29%的Fe-W-ZrO2纳米复合镀层,研究热处理对镀层结构和性能的影响.结果表明,镀态下Fe-W-ZrO2:纳米复合镀层内部结构致密无裂纹,呈明显非晶态结构特征.具有较高的硬度和耐磨性;复合镀层经500℃热处理后开始晶化,随温度升高,镀层晶化析出α-Fe相,硬度、耐磨性继续提高;700℃时复合镀层晶化完成.M6C型复合碳化物Fe3W3C析出,与α-Fe相两相并存,镀层硬度、耐磨性急剧增大,到800℃时,Fe3W3C硬质相逐渐成为主相,硬度达到最高点1 270 HV,耐磨性是镀态下的5-7倍;而且纳米微粒ZrO2的引入不会在Fe-W非晶合金镀层中形成新相,在适当的热处理下能有效提高Fe-W-ZrO2:纳米颗粒复合镀层的硬度、耐磨性.
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