以Mn代Ni对低碳高合金钢组织性能的影响

使用光学金相显微镜,衍射仪及显微硬度计,研究了以Mn代替Ni后低碳高合金钢组织与性能的变化。结果表明,以Mn代Ni的低碳高合金钢在淬火回火态下可以获得与原加镍钢相同的板条马氏体组织,但其硬度比原加镍钢要高5～6HRC,而冲击韧性降低约10J·cm-2,耐蚀性只是略有下降。因此以Mn代Ni来制取低成本的低碳高合金钢具有一定的可行性。

Influence of substituting nickel with manganese on the structure and property of the low carbon high alloy steel

The research was carried out using the metallographic microscope, the diffraction instrument and the microhardness tester. The variations of the structures and property of the low carbon high alloy steel, in which nickel was substituted with the isometric manganese were discussed. The results show that the low carbon high alloy steel of substituting the nickel with the manganese could gain the same lath martensite structure as the original steel containing the nickel in the state of the double treating, however, its hardness was 5～6 HRC higher than the original nickel steel, while the impact toughness descended about 10 J·cm-2, and the erosion resistance fell down in small amplitude, so substituting the nickel with the manganese to manufacture the low carbon high alloy steel of low cost is somewhat feasible.