一种钢帘线生产方法

正本发明公布了一种钢帘线生产方法,包括以下步骤,步骤一、原料盘条,采用高强度级钢帘线盘条,碳含量为0.85%、锰含量为0.4%、硫含量为0.01%、磷含量为0.01%,钢帘线盘条Φ5.5mm;步骤二、盘条预处理,去氧化皮、冲洗,电解酸洗、冲洗、热水洗、涂硼、烘干;步骤三、粗拉丝;步骤四、中丝热处理;步骤五、中拉丝;步骤六、成品热处理和热扩散电镀黄铜;步骤七、检验,机械性能检测,包括抗拉强度、延伸、弯曲、扭转及扩散后的强度下降率检测;步骤八、细拉丝:步骤九、单捻、双捻成型及外绕:步骤十、包装装箱。本发明有利于提高钢丝与橡胶硫     

泰隆欲引资扩产钢帘线设备

江苏泰隆集团日前正在积极谋求与国内外投资机构、生产企业、科研院所合作,共同开发轮胎钢帘线设备生产及相关技术,扩大生产规模。钢帘线是子午胎的骨架材料,属于金属制品行业高新技术产品。泰隆集团一直致力于钢帘线设备的研发,近两年先后投资6 000多万元改造钢帘线生产设备及检测设备,形成了立、卧式收放线系列,翻转式水箱拉丝系列,高速精密层绕系列,双捻合股成绳系列,重卷、外绕、卸线系列,CO2气体保护焊丝系列等产品的科研、设计与制造体系。目前,该集团一期工程设备年产能力已达到销售额过亿元的规模,产品在数十家金属制品企业获得广…     

汽车钢帘线用拉丝液耐磨性能的研究

研究了不同油性剂、极压剂和缓蚀剂对汽车钢帘线用拉丝液耐磨性能的影响。结果表明,醇类油性剂润滑效果最好,含氮类极压剂的耐磨性能更好,乙二胺四乙酸二钠作为缓蚀剂的效果好于乙二胺。     

超高强度4+3×0.35ST 钢帘线在全钢载重子午线轮胎带束层中的应用

本文研究介绍了超高强度4+3×0.35ST钢帘线的性能特点及其在全钢载重子午线轮胎中的带束层中的应用,与其代替3+8×0.33HT钢帘线相比,4+3×0.35ST ST钢帘线具有直径细、线密度小,渗胶性能高等特点,在保证成品轮胎的各项性能的同时,降低轮胎的质量,同时降低产品制造成本。     

基于相的纳晶材料的本构方程

为了对实验观察到的纳晶Cu的高强度、高塑性给予合理的解释,建立了包含2种晶粒的材料模型：最细小晶粒（2~4 nm）和普通纳晶晶粒（20~100 nm）.最细小晶粒可以看作普通纳晶晶粒的三晶交组成部分,普通纳晶晶粒由晶界影响区和晶内相组成.接着,分别建立晶界影响区和晶内相变形的本构方程.与文献实验结果进行了对比并获得了一致的结果.详细分析了最细小晶粒对于纳晶材料位错堆积能力和塑性的影响,证明其存在是材料高强度高塑性的成因.     

慢拉辊

慢拉辊是连续玻璃纤维拉丝工段的一种辅助装置,常伴随在手动操作拉丝机的一旁。当手动操作的拉丝机满筒后进行人工换筒时,或当坩埚处于作业温度并因某种原因中断拉丝时,代替拉丝机以较慢的速度拉引原丝。随着拉丝工艺的发展,人们认识到要提高拉丝生产率,就应该保持拉丝过程的稳定性,也就是说应该保持坩埚处于不停地运转状态。为了满足拉丝过程的上述要求,在采用手动操作的拉丝机的场合下,备配一台慢拉辊很有必要。     

致密锆砖在多排孔拉丝坩埚中的应用

流液洞是拉丝坩埚的重要组成部分,我厂的多排孔拉丝坩埚的流液洞以前用的是刚玉砖,在拉丝作业过程中,特别是坩埚后期流液洞给拉丝作业造成了很大困难,为了提高坩埚寿命和作业率,经过认真考虑,我们用致密锆砖代替了刚玉砖,并对这两种坩埚作了认真对比,认为致密锆砖在各个性能上都超过了刚玉砖,是多排孔坩埚流液洞的理想材料。     

山东成山集团钢帘线项目 1期工程建成投产

日前,山东成山集团钢帘线有限公司钢帘线项目1期工程建成投产。 山东成山集团钢帘线项目是摼盼鍞期间经国家计委批准建设的钢帘线项目。第1期工程总 投资2.8亿元人民币。该项目于1998年6月开工建设,引进90年代世界先进水平的钢帘线制造 技术及生产设备,主要厂房及公用工程建筑面积达2.3万m2。工程投产后可形成钢帘线5000t/a和胎圈钢线1万t/a的生产能力。 钢帘线是生产子午线轮胎必需的骨架材料,由于钢帘线生产技术含量高,工艺复杂,加工难 度大,质量要求高,投资大,在我国只有少数几个厂家生产,且生产规模远远满足不了我国 子午胎生产快速发展的需要,因此,该项目的市场前景十分广阔。为了保证工程建设万无一 失,在建设过程中,公司始终坚持高起点,严要求,严把质量关,按规范化管理模式进行管理。     

钢帘线结构现状和发展趋势

随着高速公路的迅速发展，对轮胎的性能要求越来越高。由于钢帘线具有强度高、变形小、疲劳性能优异的特点，合理选用不同结构的钢帘线，可以提高轮胎的耐磨性和轮胎尺寸的稳定性。轿车子午胎用钢帘线作带束层，可以提高乘坐的舒适性，轮胎变形小；载重胎用钢帘线作带束层和胎体层，能使轮胎的散热性能良好，提高使用寿命。因而钢帘线对轮胎性能有重要影响，钢帘线结构必须与高性能子午胎的发展要求相适应。一、钢帘线结构的发展钢帘线结构的发展主要考虑以下两点：一是满足高性能子午线轮胎的高速安全、节省燃料、环保等方面的需要；二是降…     

适应经济发展新常态,推动钢帘线产品可持续发展

回顾近15年我国汽车市场及子午线轮胎发展状况,分析我国钢帘线生产与消费市场,钢帘线企业28家,6万t企业17家,钢帘线产品从“成长期”到“成熟期”,竞争激烈。钢帘线产品质量稳步提高,相关钢帘线产品标准日趋完善,《工程子午线轮胎用钢帘线》及《硫化橡胶与钢丝帘线粘合强度的测定》国家标准已经实施,《子午线轮胎用钢丝帘线》、《钢帘线试验方法》及《钢帘线用盘条》国家标准也在修订。在国民经济“L”新常态状态下,企业通过自主创新,依托互联网+技术,提高生产效率,培育企业竞争优势。     

巨型工程机械子午线轮胎钢丝帘线应用研究

介绍巨型工程机械子午线轮胎常用的钢丝帘线,对其中几种帘线的性能进行检验,并用于实际生产。结果表明,钢丝帘线在压延、裁断和成型过程中工艺性能稳定,轮胎成品达到了设计要求,实际使用也取得了理想效果。建议开发生产更高强度、全渗透型简单化、开放式结构帘线并提高帘线的抗疲劳性能等。     

拉伸条件对高强PVA纤维结构和性能的影响

将聚乙烯醇(PVA)加入到二甲基亚砜(DMSO)和水(质量比94:6)的混合溶剂中,以甲醇为凝固剂,采用干湿法凝胶纺丝,经热拉伸和热定型后,制得高强度PVA纤维。探讨了拉伸工艺对高强PVA纤维结构和性能的影响。结果表明:对于负拉伸为40%,初拉伸2倍,220℃热拉伸9.9倍,热定型2 min的PVA纤维,纤维的结晶结构比较完善,断裂强度为17.8 cN/dtex,初始模量为310.7 cN/dtex;PVA纤维在光学显微镜下观察到的横纹反映出结晶聚集体的光学现象,横纹较多时,纤维的断裂强度和初始模量较高。     

Analysis of influence of multiple steel cords on splice strength

Influence to the steel cord conveyor belt strength has many factors. Conveyor belt splice as the weakest link, should be given more attention. In the previous analysis of single steel cord, by comparing the numerical results of splice deformation and maximum pullout force under tension, both simulation and experiment have a good agreement. Based on this, in this paper, we studied the influence of different factors on the strength of splices under multiple steel cords. In addition to the contact surface between the steel cords and the rubber, we should also pay attention to the rubber problem between adjacent steel cords compared to the single steel cord. And we forced on the simulation analysis of the influence strength of splice by two factors of the position and arrangement of the multiple steel cords. The numerical results show that in the total proportion, the pullout force in the middle position of steel cords was about 52%, however, about 47% in the edge position. For the arrangement of the steel cords, with the number of interval steel cords increases, the pullout force of the steel cord increases as well. However, when the interval steel cords with the same number increases, the increase in pullout force does not agree. The above findings are undoubtedly important for us to understand in depth the factors affecting splice strength. And it is guaranteed that we can obtain the maximum splice tensile strength in the most economical way.     

拉伸方法对高强高线密度PVA纤维结构性能的影响

聚乙烯醇经干湿法凝胶纺丝制得初生纤维后,采用不同的两级后拉伸方法,制得单纤线密度在200-300dtex的高线密度PVA纤维。探讨了两级不同拉伸条件对PVA纤维结构和性能的影响。结果表明：一级拉伸热定型,有利于折叠链晶体的完善,一级拉伸后再经二级拉伸定型,纤维结晶更完善,水中软化点和纤维断裂强度分别达到116℃和11.5cN／dtex。     

钢丝对废橡胶微波裂解过程的影响分析

研究钢丝对废橡胶微波裂解过程的影响并进行有限元仿真和试验探究。仿真结果表明,含钢丝的废橡胶在钢丝附近场强明显增强,热点增多且分布均匀。裂解试验结果表明,废橡胶中存在适量钢丝会促进废橡胶的裂解,使裂解升温更快,出油比例更高。由此认为,废轮胎整胎微波裂解更有利于提高裂解效率、促进节能环保和改善裂解产物品质。     

全钢载重子午线轮胎钢丝帘线压延质量问题及解决措施

分析全钢载重子午线轮胎钢丝帘线压延工艺中钢丝帘线重叠交叉、跳线、覆胶喷霜、露钢丝等质量问题。通过调整整经辊和压力辊,降低供胶温度和压延速度、减小供胶机胶容量、确保适合的钢丝张力值等措施,钢丝帘线的压延质量大幅提高,压延质量缺陷率小于0.2%。     

Assessment of statistical variations in impact resistance of high-strength concrete and high-strength steel fiber-reinforced concrete

The impact resistance variations of high-strength steel fiber-reinforced concrete (HSFRC), versus those of high-strength concrete (HSC), commanded this research. The impact resistance of the high-strength steel fiber-reinforced concrete improved satisfactorily over that of the high-strength concrete; the failure strength improved most, followed by first-crack strength and percentage increase in the number of post-first-crack blows. The two concretes resembled each other on the coefficient of variation values, respectively, on the two strengths, whereas the high-strength concrete was much higher in the value on the percentage increase. The Kolmogorov-Smirnov test indicates that the high-strength concrete was approximately normally distributed in first-crack and failure strengths, high-strength steel fiber-reinforced concrete was poorly normally distributed in the two strengths, and both concretes were hardly normally distributed in the percentage increase. Finally, for both concretes, failure strength regression models were developed, and then, the accompanying 95% prediction intervals for the strength were established.     

混杂纤维增强高强混凝土性能研究

为研究钢纤维、聚乙烯醇纤维混杂比例对高强混凝土性能的影响,通过合理设计坍落度试验、力学强度试验、收缩试验、抗裂试验、抗氯离子侵蚀试验,对比评价了纤维混杂比例对高强混凝土工作性、抗折强度、收缩性、抗裂性能以及氯离子渗透系数的影响。结果表明,钢纤维和聚乙烯醇纤维降低了新拌混合物的工作性。与单掺纤维相比,混杂纤维对高强混凝土力学性能改善效果不明显,但可明显改善混凝土抗裂性能,开裂面积抑制率最大为95.8%,同时能使高强混凝土收缩率和氯离子分别降低27.7%和66.5%,明显提高高强混凝土的耐久性能。通过扫描电镜试验分析探讨了纤维增强混凝土的作用机理,结果表明混杂纤维对基体内部结构的改善实现了对混凝土宏观性能的提升,最终推荐采用0.75%(体积分数)钢纤维和0.25%(体积分数)聚乙烯醇纤维。     

Preparation of high-modulus and high-strength poly(ethylene terephthalate) fiber by zone annealing

To prepare high-modulus and high-strength PET fiber, a new method using zone drawing and zone annealing has been studied. The apparatus used for this method is the usual tensile tester equipped with a band heater 2 mm wide and a sample holder which can apply a high tension to the fiber. The experimental procedure consists of two stages: zone drawing and zone annealing. The zone drawing was done on the original as-spun fiber in order to produce a fiber with as high an orientation and as low a crystallinity as possible. The zone-drawn fiber was subsequently zone annealed under high tension by moving the band heater from one end to the other of the fiber at a temperature above the crystallization temperature at a considerably low moving speed. In spite of the simple apparatus and procedure, Young's modulus of the fiber obtained was 19.4 × 10¹⁰ dyn/cm², which is comparable to the maximum value of the high-tenacity PET filament commercially available. In order to elucidate the change in the superstructure with zone drawing or zone annealing, optical, x-ray, IR, DSC, and dynamic mechanical measurements were performed. It is suggested that the zone-annealed fiber consists of almost perfectly oriented crystallites and fully extended amorphous chains.     

Adhesion Between Rubber Compounds Containing Various Adhesion Promoters and Brass-Plated Steel Cords. Part I. Effect of Sulfur Loading in Rubber Compounds

The adhesion property between rubber compounds containing different types of adhesion promoters (resinous adhesion promoter (containing both methylene donor and methylene acceptor), cobalt salt and zinc borate) and different loading amounts of sulfur and brass-plated steel cords was investigated to understand the effect of sulfur loading in the rubber compounds on their adhesion characteristics to the brass-plated steel cords. The adhesion property of the rubber compounds to brass-plated steel cords was largely dependent on both the type of adhesion promoter and the loading amount of sulfur in the rubber compounds. The pull-out force of adhesion samples increased significantly with increasing loading amount of sulfur in the rubber compounds containing resinous adhesion promoter, whereas it decreased slightly with increasing loading amount of sulfur in rubber compounds containing cobalt salt or zinc borate. In humidity aging, the best adhesion retention was observed in the rubber compound containing zinc borate and low loading of sulfur. Regardless of the type of adhesion promoter, adhesion retention after thermal aging treatments improved with increasing loading amount of sulfur in the rubber compounds. The adhesion property was interpreted in terms of the interphases formed between the rubber compounds and the brass-plated steel cords as studied using Auger electron spectroscopy.