以锰代镍对低碳高合金钢组织及冲击腐蚀磨损性能的影响
Effect of Replacing Nickel with Manganese on Microstructure and Impact Corrosion and Abrasion Property of Low Carbon High Alloy Steel
满达虎, 王丽芳
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作者单位：九江学院 机械与材料工程学院, 江西 九江 332005
中文关键字：以锰代镍； 低碳高合金钢； 组织； 冲击腐蚀磨损
英文关键字：replacing nickel with manganese; low carbon high alloy steel; microstructure; impact corrosion and abrasion
中文摘要：用光学金相显微镜、X射线衍射仪及显微硬度计，研究了以锰代镍对低碳高合金钢的组织影响。利用MLD-10型冲击磨损试验机(在铁矿石酸性矿浆中，冲击功为2.7 J条件下)研究了以锰代镍对低碳高合金钢冲击腐蚀磨损行为的影响。结果表明：加镍低碳高合金钢无论退火态还是淬火回火态，其组织均为单相板条马氏体；而以锰代镍低碳高合金钢退火态组织为上贝氏体 ＋ 屈氏体，淬火回火态得到单相板条马氏体。以锰代镍低碳高合金钢的冲击腐蚀磨损机制与加镍低碳高合金钢大致相同，即短时间内为显微切削和多次塑性变形和一定的腐蚀磨损，长时间后变成疲劳剥层为主，兼有切削、多次塑变和一定的腐蚀磨损。
英文摘要：The influences of replacing nickel with manganese on microstructure of low carbon high alloy steel were studied by metallographic microscope, X-ray diffraction instrument and microhardness tester. The behaviors of impact corrosion and abrasion of the low carbon high alloy steel adding nickel and replacing nickel with manganese were researched with a modified MLD-10 tester. The results show that as-annealed microstructure and as-quenched-tempered microstructure of the low carbon high alloy steel added nickel are both single-phase lath martensite. The as-annealed microstructure of the low carbon high alloy steel replacing nickel with manganese is upper bainite + troostite, after quenching-tempering, the microstructure is single-phase lath martensite. The impact corrosion and abrasion mechanisms of the two kinds of steel are almost the same. The impact corrosion and abrasion mechanism is micro-cutting, repeated plastic deformation and some corrosive wear within shorter time. After longer time, the impact corrosion and abrasion mechanism is mainly fatigue with shallow flaking accompanied with some cutting, repeated plastic deformation and some corrosive wear.