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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。
The microstructure of low-carbon high-alloy steel with Mn-Ni was studied by optical microscope, X-ray diffraction and microhardness tester. The impact of manganese nickel on the impact corrosion and wear behavior of low carbon high alloyed steels was investigated by MLD-10 impact wear tester (impact energy of 2.7 J in acidic ore pulp of iron ore). The results show that the microstructure of the nickel-added low-carbon high-alloy steels is single-phase lath martensite both in the annealed and quenched-tempered states, whereas in the manganese-substituted nickel low carbon high alloy steels, the annealed microstructure is upper bainite + Quats, quenched and tempered to obtain single-phase lath martensite. Nickel-manganese low-carbon high-alloy steel with impact corrosion and wear mechanism of nickel-carbon and high alloy steel is roughly the same, that is a short period of time for the micro-cutting and plastic deformation and a number of corrosion and wear, fatigue after a long time Peeling-based, both cutting, plastic deformation and a number of corrosion and wear.