关键词: 25CrMnB钢, 钒, 履带板, 耐磨性

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%.