【作者】 刘炜波；

【导师】 李明伟；

【作者基本信息】 哈尔滨工业大学 ， 材料工程（专业学位）， 2016， 硕士

【摘要】 镀锌钢丝绳的耐腐蚀性能普遍高于光面钢丝绳,尤其在使用环境恶劣的情况下,镀锌钢丝绳具有更长的使用寿命。但热镀锌钢丝生产时在拉拔过程中会有一定的锌层损失,导致钢丝表面锌层变薄,影响热镀锌钢丝的耐腐蚀性,影响使用寿命。本文对钢丝热镀锌层的摩擦磨损行为进行了研究,分析载荷、摩擦速度、润滑液浓度和温度对钢丝热镀锌层摩擦磨损行为的影响规律,并以此为基础研究拉拔工艺对钢丝热镀锌层的影响行为,得到道次、压缩率、拉拔速度、润滑液浓度和温度对钢丝热镀锌层拉拔过程中的锌损规律,提出对拉拔过程的工艺优化。通过对钢丝热镀锌层的摩擦磨损试验和热镀锌钢丝的拉拔试验,结果表明:在速度不变的情况下,随着载荷的增大,热镀锌层的磨损逐渐增大。有润滑条件的热镀锌层磨损要比无润滑条件的小,但必须控制好润滑液的浓度,浓度过高反而会使磨损增大,研究显示在浓度为2.5%~10.0%的范围内,磨损随着浓度的增加而加剧。润滑液的温度过高或过低都会影响润滑性能,增加热镀锌层的磨损,在温度为20℃~50℃的范围内,20℃和50℃两种温度时的磨损比较严重。当在摩擦速度在25mm/s~40mm/s的范围时,磨损量随着摩擦速度的加快呈先减小再增大最后再减小的现象,适当的提高摩擦速度可以减小磨损量,但一定要控制好范围,摩擦速度过快和过慢的情况都会导致磨损量增加。随着拉拔道次的增加,真应变逐渐增大导致累积锌损逐渐变大,在现有模链和润滑条件一定的情况下,累积锌损与拉拔真应变呈指数关系,热镀锌钢丝的拉拔过程中的锌层损失是一个累积加速损伤的过程。拉拔速度过快或过慢都会增加锌损,拉拔速度在180m/min~360m/min范围内时,随着拉拔速度的加快,锌损逐渐降低,当拉拔速度大于360m/min后,锌损随着拉拔速度的提高而增大。在润滑液浓度1%~3%范围时,锌损随着润滑液浓度的升高而降低,当润滑液浓度大于3%后,锌损随着润滑液浓度的升高而增大。润滑液温度在10℃~30℃范围时,锌损随着润滑液温度的升高而降低;当润滑液温度大于30℃后,锌损随着润滑液温度的升高而增大。工艺优化后的钢丝锌损明显降低.更多还原

【Abstract】 Galvanized steel wire rope corrosion resistance is generally higher than smooth rope, Especially in the use of harsh environments, Galvanized steel wire rope has a longer service life. However, hot-dip galvanized steel production during the drawing process, there will be some loss of the zinc layer. Lead wire surface zinc layer thinning effect of thermal galvanized steel corrosion, affecting life.In this paper, friction and wear behavior of steel galvanized layer is studied. Analysis of load, friction velocity,concentration and temperature of the lubricating fluid galvanized steel wire layer influence of friction and wear behavior. And thus drawing process of steel galvanized layer affect the behavior of basic research. Get pass compression ratio, drawing speed,concentration and temperature of the lubricating fluid galvanized steel wire drawing layer of zinc loss during and following the proposed procedure for drawing process optimization.By studying the results of hot dip galvanized steel wire layer friction and wear testing and hot-dip galvanized steel wire drawing tests showIn the case of constant speed, With the increase of load, the wear of hot dip galvanized layer increased gradually. Lubrication conditions in hot-dip galvanized layer wear than non-lubricated conditions is small, but it must control the concentration of lubricating fluid, increasing the concentration is too high so they will wear. Studies have shown that in the concentration of 2.5% to 10.0% range, with the increase of the concentration of wear exacerbated.Lubricating fluid temperature is too high or too low will affect the performance of lubrication, Increase the wear of hot dip galvanized coating. At a temperature of 20 degrees-50 degrees Celsius, 20 degrees Celsius and 50 degrees Celsius two kinds of temperature wear is more serious. When the friction velocity is in the range of 25mm/s ~ 40mm/s, The amount of wear decreases with the increase of the friction speed, then decreases and then increases. The appropriate increase of friction velocity can decrease wear quantity,But be sure to control a good range. Friction speed too fast and too slow will lead to increased wear and tear.With the increase of drawing passes, true strain increased gradually lead to accumulate zinc loss increases gradually, In the existing drawing line and lubrication condition of certain circumstances, Cumulative zinc loss and drawing true strain exponential relationship, Hot dip galvanized steel wire drawing process in the zinc coating loss is a cumulative process accelerated damage.Drawing speed too fast or too slow will increase zinc loss. Drawing speed in the range of 360m/min ~ 180m/min, with the acceleration of the drawing speed, zinc loss gradually reduced. When the drawingspeed is more than 360m/min, the zinc loss increases with the increase of the drawing speed.In the lubricant concentration 1% ~ 3% range of synovial fluid, zinc loss decreases with increasing concentration of lubricating fluid. When the concentration of the lubricant is more than 3%, the zinc loss increases with the increase of the concentration of the lubricant. The temperature of lubricating fluid is decreased with the increase of the temperature of the lubricant in the range of 10 ~ 30. When the lubricant temperature is greater than 30, the zinc loss increases with the increase of the temperature of the lubricant.更多还原