筛选出了能实现低温稀土渗硼的膏剂；探讨了４５钢低温渗硼层的组织与性能。结果表明，低温渗硼层仍呈梳齿状，在渗硼层前沿没有如高温渗硼那样的晶粒粗大的伪共析或过共析组织的过渡区，而只有一个相对较窄的富碳区；低温渗硼层的耐磨性和耐蚀性较高温渗硼层有所提高，而其脆性却有所降低。 The ointment which can realize boronizing at low temperature is selected, and the microstructure and properties of the boronizing layer at 45 steel are discussed. The results show that the low temperature boronizing layer is still comb-tooth-like, there is no transition zone between the front of boronizing layer and the coarse pseudo- eutectoid or hypereutectoid structure like high-temperature boronizing, but only a relatively narrow carbon- Zone; low temperature boronizing layer wear resistance and corrosion resistance than high temperature boronizing layer has increased, while its brittleness has decreased.