切割丝产品工艺与性能研究

发布时间：2017-12-27 03:33

本文关键词：切割丝产品工艺与性能研究　出处：《西安建筑科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文以Φ0.12mm的切割丝产品为主要研究对象,在生产实践中确定了生产工艺参数,主要生产工序有原料预处理、原料热处理、电镀,湿拉等。在切割丝的半成品——黄铜丝生产方面,工艺设计过程中充分从热处理、电镀等方面考虑,得到了半成品钢丝的最佳索氏体化温度为610℃,索氏体化温度越高,渗碳体的片层间距越大,钢丝的抗拉强度越低。在切割丝生产方面,研究了模具的使用寿命,发现模具拔至3000km时,随着拉拔长度的增加模具损耗增大,切割丝表面质量变差,因此确定换模周期为3000±200km。切割丝断口分析方面,得出造成断丝的原因主要有三方面,包括热处理组织不均匀,非金属夹杂,以及表面损伤。切割丝应用方面,发现模具参数的优化对钢丝表面硬度的改善作用不大,而通过降低原料黄铜丝强度,提高原料塑性,增大湿拉压缩率的方式获得的切割丝的抗拉强度3700~3800MPa左右,钢丝表面硬度值700HV0.01左右,可以改善钢丝表面耐磨性。
[Abstract]:In this paper, the product of 0.12mm cut is the main research object. The production process parameters are determined in the production practice. The main production processes include raw material pretreatment, raw material heat treatment, electroplating, wet drawing and so on. In the production of semi-finished products, brass wire cutting process, the design process fully from heat treatment, electroplating and other considerations, the semi finished steel best sorbitizing temperature is 610 DEG C, sorbitizing temperature is higher, the lamellar spacing of cementite increases, tensile strength is low steel wire. In terms of cutting wire production, the service life of dies was studied. It was found that when the die was drawn to 3000km, the die loss increased and the surface quality of cutting wire became worse with the increase of drawing length, so the die changing period was 3000 + 200km. In the analysis of cutting wire fracture, it is concluded that there are three main reasons for the broken wire, including nonuniformity of heat treatment tissue, non-metallic inclusion, and surface damage. The cutting wire application, improve the effect of die parameters optimization found on hardness on the surface of the wire, and by reducing the Raw Brass strength, improve material plasticity, tensile strength of 3700~3800MPa wire for increasing wet tensile compression ratio method, steel wire surface hardness value of about 700HV0.01, can improve the wear resistance of the steel wire surface.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG48

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