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研究了Fe-2.5V合金的渗碳及渗后合金与20钢的热压复合,结果表明,厚度为1 mm的Fe-2.5V合金,在温度950℃和碳势1.2%C条件下渗碳4 h,材料完全渗透,组织为屈氏体加V4C3碳化物。将渗碳后的Fe-2.5V合金与20钢热压复合,将发生碳原子自Fe-2.5V合金向20钢的扩散,碳的扩散深度为0.12 mm。界面附近的Fe-2.5V合金组织形貌未发生改变,而20钢的组织由原来的珠光体加铁素体转变为全珠光体组织。Fe-2.5V合金的硬度在1150 Hm左右。在距界面大约60μm处,硬度开始下降,在界面处的硬度为1100 Hm。
The effects of carburizing and infiltration on Fe-2.5V alloy and hot-pressing of 20 steel were studied. The results show that the Fe-2.5V alloy with thickness of 1 mm carburized at 950 ℃ and 1.2% C 4 h, the material completely infiltrated, the organization of troostite plus V4C3 carbide. The carburized Fe-2.5V alloy and 20 steel hot compaction, carbon atoms will occur from the Fe-2.5V alloy 20 steel diffusion, carbon diffusion depth of 0.12 mm. The morphology of the Fe-2.5V alloy near the interface did not change, while the microstructure of 20 steel changed from the original pearlite to ferrite to the whole pearlite. Fe-2.5V alloy hardness of about 1150 Hm. At a distance of about 60 μm from the interface, the hardness begins to decrease and the hardness at the interface is 1100 Hm.