Herein, a kind of the ultrastrong low alloy wear‐resistant steel suitable for excavator bucket teeth is prepared. The ultrastrong steel with good toughness and wear resistance is successfully prepared by the forging, quenching, and tempering processes. The yield strength, tensile strength, elongation, and hardness of the ultrastrong steel reached up to 1700, 1960 MPa, 7%, and 563HV, respectively. Optical microscope (OM), scanning electron microscope (SEM), and transmission electron microscope (TEM) are used to observe the microstructures of the ultrastrong steel. After the forging, quenching, and tempering, two types of martensite laths are formed in the matrix of the ultrastrong steel, i.e., the coarse laths with low‐density dislocations and the thin laths with high‐density dislocations and some ε‐carbides. Low‐temperature tempering allows the carbides to precipitate in large quantities, and maintains the matrix with high density dislocations in the thin laths, which is the micromechanism of the steel with high strength and high toughness, and good wear resistance.

中文翻译：

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超强低合金耐磨钢的力学性能和组织研究

在这里，准备了一种适用于挖掘机铲斗齿的超高强度低合金耐磨钢。通过锻造，淬火和回火工艺成功制备了具有良好韧性和耐磨性的超强钢。超强钢的屈服强度，抗拉强度，伸长率和硬度分别达到1700、1960 MPa，7％和563HV。光学显微镜（OM），扫描电子显微镜（SEM）和透射电子显微镜（TEM）用于观察超强钢的显微组织。经过锻造，淬火和回火后，超强钢基体中形成了两种类型的马氏体板条，即低密度位错的粗板条和高密度位错的薄板条以及某些ε-碳化物。