高耐磨金属针布齿条钢材探讨(一)

Probing into High Wear-resistant MCC Wires

为了探讨在当代金属针布齿条加工工艺条件下如何制造高耐磨产品,分析金属针布的加工工艺和磨损机理,以转杯纺分梳辊齿条为例,对82B,GRST1,GRST2,3个国产新型钢种和瑞士格拉夫公司产OK40型齿条在快速磨损模拟试验机上进行对比试验和分析;详细论述齿条表面氧化皮、表面粗糙度、钢材元素成分与齿尖金相组织、钢材夹杂等对齿条耐磨度的影响;以GRST1钢为基础,吸收OK40型和ECC公司齿条产品用钢材元素成分组合,给出高耐磨金属针布齿条专用钢材元素成分。指出:OK40型齿条耐磨度最好,其次为GRST1钢齿条;影响齿条跑合期磨损的主要因素是其表面氧化皮、冲口和两侧面粗糙度及齿部脱碳层;影响齿条稳定期耐磨度的主要因素是钢材元素成分及其质量分数和金相组织;高耐磨金属针布齿条专用钢材元素以GRST1钢为基础,加入Mo元素,使其C,Cr,Ni,Al和Mo的质量分数分别为0.74%~0.78%,0.18%~0.22%,0.054%和0.10%~0.20%。

To explore how to manufacture high wear-resistant products in contemporary MCC wires processing conditions,analysis is done to the processing technology and wear mechanism of MCC.Sampling the wires on the carding roller of the rotor spinning frame,comparative analysis is done to the products of domestic steel 82B,GRST1 ,GRST2 and wires OK40 from Swiss Graf company after fast wear simulation test.Detailed discussion is made on the oxide scales of the wires, surface roughness, steel element composition and microstructure of the tooth points, inclusions and other effects on the abrasion resistance of the wires ; taking GRST1 steel as the foundation,considering the element composition of OK40 and ECC products, components with high wear-resistant MCC wires are given.It is noted that wires OK40 is of good wear-resistant, followed by that of GRST1.Main factors affecting wire running-in include surface oxide scales, notching,roughness on the both sides and tooth decarburized layer while main factors affecting wire wear-resistance in the stable phase include elements of the steel wire and mass fraction and microstructure.The high wear-resistant wires of MCC, in case of special steel element with GRST1 steel,if element of Mo is added,so to make the mass fractions of C,Cr,Ni,Al and Mo are respectively as 0.74%～0.78% ,0.18%～0.22% ,0.054% and 0.10%～0.20%.