【摘要】 采用交流电场铺助固体粉末法对40CrNiMo钢进行低温渗硼，以不同配比的碳化硼（B₄C）和氟硼酸钾（KBF₄）作为渗硼剂，Al₂O₃为填充剂，并添加少量的镍粉。利用金相显微镜和扫描电镜观察渗层的微观组织及形貌，并用X射线衍射仪（XRD）分析渗层的物相。结果表明，渗硼剂中添加镍粉，能够降低渗硼初期的硼势，但影响渗硼层中FeB相形成的主要原因仍为供硼剂中B₄C含量。以4%B₄C、6%KBF₄、2%镍及Al₂O₃的渗硼剂配比，采用680℃电场辅助渗硼，在40CrNiMo钢表面获得了致密的Fe₂B单相渗硼层。更多还原

【Abstract】 40CrNiMo steel was boronized at low-temperatures by using alternating current（AC） field assisted pack boriding. Boron carbide（B₄C） and potassium fluoroborate（KBF₄） were used as boronizing agents in varying amounts, Al₂O₃ was used as filler, and a small amount of nickel powder was added. Metallographic microscope, scanning electron microscope and X-ray diffractometer were used to investigate the microstructure, morphology, and to assess phases of the boronized layer. The findings indicate that adding nickel power to the boronizing agent can lower the boron potential during the first stages of boronization, while the B₄C content of the boron source is still the primary factor influencing the formation of FeB phase in the boronized layer. A dense Fe₂B single-phase boronized layer can be formed on the 40CrNiMo steel when using an electric field assisted boriding process at 680 ℃ with a ration of 4%B₄C, 6%KBF₄, 2% nickel, and additional Al₂O₃ boronizing agents.更多还原