钢丝绳断丝检测信号特征的实验研究

发布时间：2018-03-01 20:17

本文关键词： 钢丝绳金相实验检测实验断丝信号分析　出处：《江西理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：由于钢丝绳具有强度高、弹性好、自重轻及挠性好等优点,被广泛的应用于煤炭、冶金、石油、建筑、机械制造、交通运输、林业,港口等行业。一直以来,因钢丝绳断丝而引发的事故频频发生,究其原因是现阶段市场上尚缺乏有力可靠的检测手段,人们无法掌握钢丝绳的损伤程度与检测信号之间的确切关系,因而无法确定在役钢丝绳的损伤与剩余强度的定量关系。因此,采用可靠的检测设备对钢丝绳的损伤程度进行检测,有效地提取检测信号,深入分析检测信号特征,为定量确定钢丝绳损伤与剩余强度的关系提供可靠的依据已经显得尤为重要。本文利用光谱仪和金相显微镜对72A、82B、304、316钢丝进行了光谱实验和金相实验,得到了它们的化学成分,观察了金相组织形貌、晶粒种类等。分析了这四种钢丝的化学成分、金相组织与其强度、塑性、韧性等性能的关系,并对四种钢丝性能的优缺点进行了比较,得到结论:72A和82B钢丝在强度和组织性能上较304和316更适合作为制作钢丝绳的材料。依据漏磁原理,利用从波兰进口的MD120B钢丝绳探伤仪器进行模拟实验,对72A钢丝绳不同的断丝损伤进行检测。提取检测信号,分析检测信号的波峰、波宽与不同断丝数目、不同断丝间距、不同钢丝直径等断丝损伤参数之间的关系。通过对检测信号的数据整理和分析,得到了检测信号波峰、波宽与断丝数目、断丝间距、钢丝直径等钢丝绳断丝损伤参数之间的关系曲线。钢丝绳检测要从多方位对钢丝绳进行全面损伤检测,本文主要研究了钢丝绳的断丝损伤检测信号与其断丝损伤参数之间的关系,为实现钢丝绳在役检测提供数据支撑,同时为定量判断钢丝绳损伤与剩余强度的关系提供参考依据。
[Abstract]:Because of its advantages of high strength, good elasticity, light weight and good flexibility, steel wire rope has been widely used in coal, metallurgy, petroleum, construction, machinery manufacturing, transportation, forestry, port and other industries. Accidents caused by wire rope breaking occur frequently. The reason is that there is still a lack of strong and reliable detection means in the market at present. People can not grasp the exact relationship between the damage degree of wire rope and the detection signal. Therefore, it is impossible to determine the quantitative relationship between the damage and the residual strength of the wire rope in service. Therefore, the damage degree of the wire rope is detected by reliable testing equipment, and the detection signal is extracted effectively, and the characteristics of the detection signal are deeply analyzed. It is very important to provide reliable basis for quantitative determination of the relationship between the damage of wire rope and the residual strength. In this paper, spectroscopic and metallographic experiments have been carried out on 72A1-82BC304316steel wire, and their chemical compositions have been obtained. The morphology and grain types of metallographic structure were observed. The chemical composition of the four steel wires and the relationship between the metallographic structure and their strength, plasticity, toughness, etc., were analyzed, and the advantages and disadvantages of the four kinds of steel wire properties were compared. It is concluded that: 72A and 82B steel wires are more suitable for making wire rope than 304 and 316 steel wires in strength, structure and properties. According to magnetic flux leakage principle, the MD120B wire rope inspection instrument imported from Poland is used to carry out simulation experiment. The different broken wire damage of 72A wire rope was detected. The detection signal was extracted, and the wave peak, wave width and number of broken wires, and the distance between broken wires were analyzed. The relationship between the damage parameters of wire breakage with different wire diameters. The wave peak, wave width, the number of broken wire and the distance between broken wires are obtained through the data processing and analysis of the detection signal. The relationship curve between the damage parameters of wire rope such as wire diameter and so on. This paper mainly studies the relationship between the damage detection signal of wire rope and its broken wire damage parameters, which provides data support for the in-service detection of wire rope, and provides a reference basis for quantitatively judging the relationship between the damage of wire rope and the residual strength.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD532

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