共查询到19条相似文献,搜索用时 156 毫秒
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为解决单辊破碎机篦板在高温状态下耐磨性能差、使用寿命短的难题,在分析篦板的磨损情况及磨损机理的基础上,设计了一种阶梯式堆焊耐磨合金复合篦板,其使用寿命比原整体式铸造耐磨合金篦板提高3~4个月,1台单辊破碎机年可节约备件费用10万余元。 相似文献
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为解决陶瓷侧壁衬、陶瓷上下板衬和陶瓷文丘里管先后损坏问题.侧壁衬改成30铸钢与DXRE耐磨焊条堆焊结构;上下衬板改为由普通碳素钢板与合金钢板用螺栓连接,并在钢板之间充填乐秦596粘结剂;文丘里管材质改为20号渗碳淬火钢,均取得了满意的效果。 相似文献
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阐述了钎焊式硬质合金衬板布料溜槽的研制过程,利用实验的方法试验制作了钎焊碳化钨硬质合金块耐磨衬板布料溜槽。此布料溜槽的衬板硬度高,耐磨性好,可靠性高。具有抗冲击、耐高温、耐磨损、耐腐蚀等特点。解决了普通布料溜槽衬板在恶劣环境下耐磨性能降低,一般仅8-12个月就因衬板磨穿而失效的问题。钎焊式硬质合金衬板布料溜槽正常使用寿命可达18个月以上,适用于1000m3~5500m3高炉,延长了高炉的检修周期,节约了成本,提高了炼铁效率。 相似文献
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新型手工电弧粉末堆焊技术在冶金工业中的应用 总被引:1,自引:0,他引:1
采用新型手工电弧粉末堆焊工艺方法,对冶金行业中易磨损零部件表面堆焊Cr,Mo,V,WC,B碳化物等高硬合金材料,以达到表面改性目的。使用证明,这一工艺方法制作的耐磨堆焊焊条与加工的高硬耐磨复合钢板,能提高材料耐磨、耐腐蚀及高温性能,延长材料使用寿命。该工艺方法简单,成本低廉,降低了非计划停机时间和生产成本,提高了设备作业率、减少检修工人劳动强度。 相似文献
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本文简单介绍了国内外对耐磨合金堆焊工艺的研究,阐述了组成合金浸润堆焊新工艺及其材料的研究和试验过程。研究表明:以不同粒级配比的铸造碳化钨为耐磨相,以Cu—Mn—Ni—Si合金为浸润合金,采用特制型腔和特殊保护进行炉中浸润堆焊。对磨损工件和模具是一种良好的堆焊方法,其堆焊层的硬度达HRc=92~94,耐磨性大大提高。 相似文献
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碳化钨是世界上最重要的硬质合金材料。美国生产的全部钨金属有60%用来制成碳化钨。它在高于1000℃的温度下硬度极高,因此是机床切削刀具、岩石钻头、土方工程设备表面耐磨堆焊的理想材料。目前, 相似文献
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机械科学研究院哈尔滨焊接研究所发挥自身技术优势 ,研制开发出 5 0 μm~1 2 0 0 μm的碳化钨小球粉材受到社会关注。据介绍 ,碳化钨小球粉材作为耐磨硬质点被广泛应用于石油钻井、矿山机械、机械加工、焊接、喷涂、制笔等对尺寸精度要求不高但耐磨的构件或制品的表面堆焊中 ,如耐磨件的表面处理和修复 ,其中绝大部分使用的是耐磨性和填充密度较低的铸造破碎碳化钨粉 ,高档产品中应用的碳化钨材料主要依靠进口。该项目研究开发利用国产原料制备粒度在 5 0~1 2 0 0 μm的碳化钨小球。完善改进生产工艺 ,提高生产效率 ,使其达到产业化生产水… 相似文献
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本文通过碳化钨料钟(斗)在济钢的应用效果分析表明,其硬度高,耐冲刷性好,使用寿命比堆焊合金料钟(斗)延长2倍以上,并可节省检修时间,提高作业率。 相似文献
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针对天铁棒线厂1#、2#线碳化钨辊的失效现象进行了分析,总结出碳化钨辊失效的8种主要形式,找出了8种碳化钨辊失效产生的原因,通过制定改进措施,减少了碳化钨辊失效的几率,延长了碳化钨辊的使用寿命,降低了生产成本,提高了经济效益. 相似文献
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G. Madhusudhan Reddy A. Sambasiva Rao K. Srinivasa Rao 《Transactions of the Indian Institute of Metals》2013,66(3):231-238
Titanium alloys are widely used in aerospace applications due to their properties like high strength to weight ratio, good corrosion and creep resistance. Poor wear resistance of these alloys limits their use in tribological applications. Friction surfacing technique is now recognized as an effective solution to surface engineer the light weight high strength alloys to make them suitable for general engineering applications involving wear and corrosion. The present work pertains to a study on wear resistance of surface coating of boron carbide on Ti–6Al–4V alloy using friction surfacing technique. Coating was formed by placing the boron carbide powder into the holes of predetermined depth on the surface and was characterized by metallography, electron probe micro analysis and dry sliding wear testing. The present study revealed that titanium alloy could be friction surfaced with boron carbide powder. The coating exhibited excellent wear resistance, which is attributed to the formation of strong metallurgical bond with the substrate. In the present work an attempt has also been made to compare the wear behaviour of surface composite layer on titanium alloy with that of conventionally used engineering materials such as mild steel and austenitic stainless steel. Wear data clearly revealed that wear resistance of friction stir surfaced composite layer is better than that of mild steel and stainless steel. This study demonstrated that friction stir surfacing is an effective strategy for the enhancement of wear resistance of titanium alloys. 相似文献
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A dual composite of WC-Co 总被引:1,自引:0,他引:1
Zhigang Fang Greg Lockwood Anthony Griffo 《Metallurgical and Materials Transactions A》1999,30(12):3231-3238
Hardness, fracture toughness, and wear resistance are strongly inter-related properties of cemented tungsten carbide. Higher
hardness usually dictates higher wear resistance but at the cost of fracture toughness. A new dual composite of WC-Co, named
DC carbide, is reported in this article. The new, hybrid, particulate composite material has higher fracture toughness than
conventional WC-Co material at equivalent wear resistance. Moreover, it has higher wear resistance at equivalent fracture
toughness when compared to tool steels. The improved properties are achieved by the composite microstructure that maximizes
mean free path (MFP) between hard reinforcement particles. The new composite material is also unique in that the reinforcement
phase is a composite material in and of itself. 相似文献
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石横特殊钢厂350t液压剪存在活塞杆与防尘圈间隙大、活塞杆与导向套磨损严重、密封件失效、液压介质泄漏、液压剪拆装修复困难等问题。为此,对液压剪进行改进,以V型密封代替原Yx型密封圈,并改进活塞杆受力状态,使液压剪使用寿命由120d延长至360d,减轻了工人劳动强度,年节约备件资金约22万元。 相似文献
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