耐震钨丝特性及应用

研究了高钾掺杂钨丝、加钴掺杂钨丝和加铼掺杂钨丝的高温特性和耐震性能 ,进行了应用试验 ,指出了生产耐震灯泡时选用钨丝应注意的问题。     

卤素灯用特种钨丝的研究与生产

<正> 一、前言所谓特种钨丝,主要指用作汽车、火箭、飞机、坦克、投光机、电影放映机、摄影照明、复印机灯等的一种特殊性能的钨丝。同时还包括装饰灯泡和X射线管用灯丝。这些灯泡都是在十分苛刻的条件下工作,所以特种钨丝必须具有优良的耐高温抗下垂性、耐震性、不变形性、以及高效率、长寿命和寿命稳定性等特点。例如,耐震灯泡,除了装     

钨合金的开发和应用现状

简单叙述了钨合金的特点,介绍了钨及钨合金在耐震钨丝、复合稀土钨电极和军事上的穿甲弹、钨子弹、药型罩的开发和应用。     

掺杂钴对掺杂钨丝抗震性能的影响

本文研究了在抗震钨丝的制备过程中,添加剂Co对钨丝的延性、再结晶温度和钨丝组织性能的影响。实验研究表明:掺杂钨丝中添加Co不仅能提高掺杂钨丝的二次再结晶温度,使掺杂钨丝退火后具有大的L/W值和小的冷脆性外,还能有效改善钨丝的高温抗震性能。     

钨丝生产技术浅析

本文介绍了钨丝的用途以及我国钨丝产业的发展与现状，阐述了钨丝加工技术的特点，并展望了钨丝生产技术的发展趋势。     

抗拉强度对钨丝质量的影响

通过分析加工过程中钨丝的抗拉强度对钨丝质量的影响，提出了合理选择退火点，严格控制钨丝抗拉强度σb值等改进工艺及提高钨丝质量的具体措施。     

粗钨丝裂点影响因素研究

文章研究了不同加工温度、退火温度、退火点对钨丝裂点水平的影响,分析中间工序钨杆硬度和金相结构的变化,对不同规格钨丝进行涡流探伤,得出最佳的加工工艺。通过金相观察钨丝裂点位置形态,发现钨丝的裂点是由表面向中心延伸,指出钨丝表面残余拉应力是造成钨丝裂点的根本原因。     

掺杂钨丝基础研究和质量评价技术的突破性进展

以控制和提高掺杂钨丝的性能为目的,研究了影响掺杂钨丝质量的微观结构本质和提高性能的机理,介绍了掺杂钨丝的质量评价在线监控技术,为制订掺杂钨丝的生产工艺和进行质量控提供了理论依据。     

加热子用钨丝性能改善研究

随着热蒸镀技术的迅速发展,对加热子用钨丝的质量要求越来越高。试验研究了加热子用钨丝制备过程中,粉末粒度组成和退火温度对钨丝弯折性能的影响。试验结果表明,当制备加热子用钨丝的粉末由50%粗颗粒钨粉和50%中颗粒钨粉组成时,烧结的钨条密度最高,晶粒最细;退火温度1 900℃时组织为完全再结晶组织,组织结构均匀,钨丝的弯折性能最好。通过调整粉末粒度来细化坯条的晶粒组织、优化退火温度来均匀细化丝材纤维组织,生产出具备均匀细小、高强度纤维组织的钨丝,较好地改善了加热子用钨丝的弯折性能,减少钨丝生产和加热子制备过程中的断丝情况,并提高加热子的热蒸镀寿命。根据研究数据表明,采用新工艺比现行工艺生产加热子用钨丝连续10点弯折拉直后的断丝次数减少1.1次,制备的加热子可蒸镀炉次提升8.6%。     

D0.2mm直钨丝的研制与生产

对钨丝矫直的基本机理进行了探讨，指出钨丝矫直的过程实际为弹-塑性弯曲变形。采用本文的试验方法，可生产出满足特殊要求的矫直钨丝。     

提高钨丝质量和经济效益的途径

钨粉搭配、低温预烧和垂熔烧结制度是获得优质钨坯条的最佳工艺条件 ;旋锻工艺、再结晶退火点选择、拉丝速度和压缩比的最佳配合是制取优质钨丝的关键条件     

Preparation of Hard Alloy WC and WC – Co Mixtures with Reduction and Carbidizing Treatment of Oxidized Tungsten Containing Scrap

A method of single-stage reduction and carbidizing treatment of oxidized tungsten containing scrap (hard alloys of the VK type and tungsten wire) is proposed. Procedures are suggested for preparing very fine tungsten carbide of stoichiometric composition without adding carbon black by reduction and carbidizing treatment of oxidized tungsten wire scrap and also with introduction of solid carbon (carbon black) during reduction and carbidizing treatment of oxidized hard alloy scrap.     

钨丝探伤缺陷及影响因素研究

介绍了照明行业对钨丝的基本要求.采用涡流探伤对D0.39 mm钨丝进行了探伤检测,通过对探伤缺陷部位的取样及金相观察,总结了几种典型的缺陷类型,并对其产生原因和影响因素进行了简要分析.     

掺杂钨丝抗拉强度对其绕丝性能的影响

研究分析了在确定的工艺条件下 ,掺杂钨丝抗拉强度在加工过程中的变化趋势 ,成品丝材抗拉强度对其绕丝性能的影响。指出掺杂钨丝抗拉强度在生产、使用中存在着的一个安全区 ,在安全区内掺杂钨丝绕丝开裂率可控制在3%以下     

中国钨丝加工业的发展和科技进步

简要回顾中国钨丝加工业的发展历程,介绍钨丝加工业的产量、品种规格、对外贸易、生产工艺技术更新和取得的科技进步,并阐述钨丝行业的发展趋势。     

Dopant particle characterization and bubble evolution in aluminum-potassium-silicon-doped molybdenum wire

The present article describes the creation of dopant inclusions in aluminum-potassium-silicon (AKS)-doped molybdenum powder and the generation of potassium bubbles in doped molybdenum wire. Molybdenum wire is used extensively in the incandescent lamp industry for coiling mandrels, filament support wires, and foil seals. The AKS-doped molybdenum wire is an important product, because it possesses greater high-temperature strength and a higher recrystallization temperature than undoped molybdenum; both of these properties are important for structural applications in lamps. The AKS-doped molybdenum wire is produced in a similar manner to AKS-doped tungsten wire, but lower processing temperatures are typically used for the production of molybdenum wire. Previous studies on AKS-doped tungsten wire have shown that the dispersion which provides the interlocking grain structure in recrystallized tungsten wire is bubbles of elemental potassium; these enhance incandescent lamp filament life. However, there is little previous work on the potassium-containing dispersion in AKS-doped molybdenum wire. In AKS-doped molybdenum, the dispersion can be either potassium bubbles, or solid oxide particles, depending on the processing method. This article will describe a series of analyses of doped molybdenum wire and its precursors, namely, doped powder and sintered ingots. The roles of high- and low-temperature sintering are also described.     

Splitting of tungsten wire in the knife-edge compression test

As-drawn tungsten wire has been known to split and rolled tungsten sheet to delaminate if mishandled. The mechanism of splitting of tungsten wire in a knife-edge compression test was studied for a number of tungsten wires of different diameter, composition, processing history, and origin. The micro-structure of these wires was examined by optical, scanning, and transmission electron microscopy. Grain boundary composition was determined by Auger electron spectroscopy. A correlation between the number of transverse boundaries in the microstructure and the split load in the knife-edge compression test was observed; the greater the number of transverse boundaries, the lower the load required to induce a split. This relationship held for all wires, regardless of the history of the wire. It was concluded that transverse grain or subgrain boundaries are responsible for initiating splits in the knife-edge compression test. The mechanism of splitting is discussed.     

涡流探伤在钨丝生产中的应用

介绍了涡流探伤的基本原理和设备组成,重点阐述了涡流探伤在钨丝生产中的应用,并对涡流探伤的各种参数设定及影响探伤结果的因素进行了分析和探讨,指出涡流探伤技术是检测钨丝表面质量的有效手段,展望了该技术在金属丝材加工领域的应用前景。     

拉拔钨丝工艺过程中抗拉强度的控制

钨丝的抗拉强度是随变形程度增大而增高 ,合理地控制退火工序前后的抗拉强度下降比例是生产高质量钨丝的关键。