重型刮板输送机链轮材料与性能研究
发布时间：2018-11-17 17:42
【摘要】：链轮是刮板输送机上重要的耐磨件,在煤矿机械行业中应用广泛。目前大运量、长运距、大功率矿用链轮主要依赖于进口产品,为了进一步了解进口链轮材质、链轮制造工艺与国产链轮产品之间的不同差异,因此,对重型刮板输送机链轮材料与性能的研究十分重要。本文以两种进口链轮产品为对象,通过理论分析与试验相结合的方法,对两种链轮产品的表层与芯部试样进行分析。主要研究内容如下:根据刮板输送机链轮的工作原理、工况条件、失效形式及磨损原因,分析了对链轮材料的组织要求和性能要求;利用化学成分分析、X物相检测、显微组织观察等方法确定了两种进口链轮产品的材料成分、物相组成以及金相组织;通过拉伸试验机对链轮试样的强度进行测试,确定了试样的拉伸参数,并结合断口宏细观形貌,分析了两种链轮产品的力学性能;应用维氏硬度仪对链轮试样的微观硬度进行检测,揭示了两种链轮产品表层与芯部材料硬度的变化规律,采用销盘式摩擦磨损试验机,在变载荷和变转速条件下,测试了链轮试样的磨损失重和摩擦系数,并结合磨损形貌,分析了两种链轮产品材料的耐磨性。本研究有助于国产链轮新型材料的开发,并对链轮的制造也具有一定的促进作用。
[Abstract]:Sprocket is an important wear-resistant part in scraper conveyor, which is widely used in coal mine machinery industry. At present, large volume, long distance and high power mining sprocket mainly depend on imported products. In order to further understand the material of imported sprocket, the difference between sprocket manufacturing technology and domestic sprocket products is different, so, It is very important to study the material and performance of heavy scraper conveyor sprocket. In this paper, two kinds of imported sprocket products are taken as the object. The surface and core samples of the two kinds of sprocket products are analyzed by the method of combining theoretical analysis and test. The main research contents are as follows: according to the working principle, working condition, failure form and wear reason of scraper conveyor sprocket, the structure and performance requirements of sprocket material are analyzed. The material composition, phase composition and metallographic structure of two kinds of imported sprocket products were determined by means of chemical composition analysis, X phase detection and microstructure observation. The tensile parameters of the sprocket specimen were determined by tensile testing machine, and the mechanical properties of the two sprocket products were analyzed according to the macroscopic and meso-morphology of fracture surface. The microhardness of sprocket samples was tested by using Vickers hardness tester, and the change rule of hardness of surface and core materials of two sprocket products was revealed. The pin-disc friction and wear tester was used under the condition of variable load and variable rotational speed. The wear loss and friction coefficient of sprocket samples were measured and the wear resistance of two sprocket materials was analyzed. This study is helpful to the development of new materials for sprocket and can promote the manufacture of sprocket.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD528.3
本文编号：2338593
[Abstract]:Sprocket is an important wear-resistant part in scraper conveyor, which is widely used in coal mine machinery industry. At present, large volume, long distance and high power mining sprocket mainly depend on imported products. In order to further understand the material of imported sprocket, the difference between sprocket manufacturing technology and domestic sprocket products is different, so, It is very important to study the material and performance of heavy scraper conveyor sprocket. In this paper, two kinds of imported sprocket products are taken as the object. The surface and core samples of the two kinds of sprocket products are analyzed by the method of combining theoretical analysis and test. The main research contents are as follows: according to the working principle, working condition, failure form and wear reason of scraper conveyor sprocket, the structure and performance requirements of sprocket material are analyzed. The material composition, phase composition and metallographic structure of two kinds of imported sprocket products were determined by means of chemical composition analysis, X phase detection and microstructure observation. The tensile parameters of the sprocket specimen were determined by tensile testing machine, and the mechanical properties of the two sprocket products were analyzed according to the macroscopic and meso-morphology of fracture surface. The microhardness of sprocket samples was tested by using Vickers hardness tester, and the change rule of hardness of surface and core materials of two sprocket products was revealed. The pin-disc friction and wear tester was used under the condition of variable load and variable rotational speed. The wear loss and friction coefficient of sprocket samples were measured and the wear resistance of two sprocket materials was analyzed. This study is helpful to the development of new materials for sprocket and can promote the manufacture of sprocket.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD528.3
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