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首页> 外文会议>Conference on Nanophysics and Nanomaterials >The Effect of Finely Divided Martensite of Austenitic High Manganese Steel on the Wear Resistance of the Excavator Buckets Teeth
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The Effect of Finely Divided Martensite of Austenitic High Manganese Steel on the Wear Resistance of the Excavator Buckets Teeth

机译：奥氏体高锰钢精细分开的马氏体对挖掘机桶齿耐磨性的影响

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An analytical review of the effect of high-temperature thermomechanical treatment on the structure and properties of steels as a possible effective method of strengthening the teeth of excavator buckets. It is shown that the application of this method can have a positive effect not only on the hardness, but also on the entire complex of their mechanical characteristics, such as plasticity, impact toughness and fatigue resistance. In relation to Hadfield steel as the most frequently used material of the bucket teeth, it is noted that with increasing deformation grade of billets from 1 to 5, tensile strength of steel increases from 570 to 1030 MPa, yield strength - from 480 to 790 MPa, relative elongation - from 14.3 to 17.9 %, relative contraction - from 17.2 to 20.1 %, impact strength KCU - from 1.51 to 2.14 MJ/m~2. This article presents the results of metallographic analysis and comparative tests for abrasive wear of Hadfield steel samples after typical heat treatment practiced at bucket teeth manufacturers and thermomechanical treatment. It is established that high-temperature plastic deformation of steel samples before quenching increases their wear resistance by 1.7 times. The authors attribute the detected increase in wear resistance to the formation of fine martensite in the surface layers of steel with a needle size of 3-10 nm, which increases its hardness by 47%. It is concluded that the presence of fine martensite in the structure of Hadfield steel can increase the service life of excavator bucket teeth made of this material. The results of this study are planned to be used in the development of an improved technological process for manufacturing bucket teeth of excavators.
机译：高温热机械处理对钢材结构及性能效应的分析综述作为强化挖掘机桶齿的可能有效方法。结果表明，该方法的应用不仅可以对硬度产生积极效果，而且可以对其机械特性的整个复合物，例如可塑性，冲击韧性和疲劳性。与Hadfield Steel作为桶齿最常用的材料相比，指出，随着坯料的变形等级从1〜5增加，钢的拉伸强度从570增加到1030MPa，屈服强度 - 从480到790MPa ，相对伸长率 - 从14.3％至17.9％，相对收缩 - 从17.2-20.1％，冲击强度Kcu - 从1.51到2.14 mj / m〜2。本文介绍了在铲斗牙齿制造商和热机械处理的典型热处理后Hadfield钢样品的金相分析和对比较试验的结果。建立淬火前的钢样品的高温塑性变形会使其耐磨性增加1.7倍。作者将检测到的耐磨性增加耐磨性的耐磨性增加，其钢的表面层中的细马氏物的形成，针尺寸为3-10nm，其硬度增加了47％。得出结论，哈尔菲尔德钢结构结构中的良好马氏体的存在可以提高由此材料制成的挖掘机桶齿的使用寿命。计划用于制定挖掘机桶齿的改进技术过程的开发。

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