Abstract: Concentrating on the problem that the existing track shoes are vulnerable to rapid wear and tear caused early failure,in this paper,25CrMnB is used as the comparative steel,added 0. 08% ,0. 12% and 0. 16% vanadium respectively, smelted and cast into 50 kg steel ingots in a laboratory using a 150 kg medium frequency vacuum induction furnace. The steel ingot is heated by a box type electric resistance furnace and rolled into a flat steel of 12 mm thickness. The effects of different vanadium contents on the wear resistance is studied by wear resistance test and precipitation phase analysis. The results show that, with increasing vanadium content in the steel,the amount of vanadium precipitates increases,and the hardness as well as wear resistance of the test steel are significantly improved. When the vanadium content in the steel increases from 0.004% to 0.16% ,the HRC hardness value of the test steel increased from 36.5 to 43.5,compared with 25CrMnB steel,and the relative abrasion rate decreases from 100% to 88.2% ,and the relative abrasion rate decreased by 11.8%.

摘要： 针对现有履带板容易因快速磨损而造成早期失效的问题,以25CrMnB作为对比钢,分别添加了0.08%、0.12%和0.16%的V,在实验室采用150 kg中频真空感应炉冶炼并浇铸成50 kg的钢锭,钢锭经过箱式电阻炉加热后轧制成12 mm厚扁钢。通过耐磨性试验、析出相分析等方法,研究了不同钒含量对其耐磨性能的影响。结果表明,随着钢中钒含量的增加,钒的析出物数量增加,试验钢的硬度和耐磨性均大幅提升,当钢中V含量由0.004%增加到0.16%时,试验钢的HRC硬度值从36.5提高到43.5,与25CrMnB钢相比,其相对磨损率由100%降低到88.2%,相对磨损率降低了11. 8%。

关键词: 25CrMnB钢, 钒, 履带板, 耐磨性