共查询到19条相似文献,搜索用时 78 毫秒
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针对秦皇岛首秦金属材料有限公司粗轧机牌坊上的机架辊定位槽两侧面磨损、腐蚀较严重的问题,采用激光熔覆在线修复技术对机架辊定位槽进行了修复,修复后涂层表面基本无腐蚀磨损现象,年磨损量约0.1 mm,完全满足使用要求。 相似文献
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激光熔覆修复齿轮轴工艺研究 总被引:1,自引:0,他引:1
采用激光熔覆工艺对某船用减速齿轮箱齿轮轴的磨损齿面进行尺寸修复.为制定合理的修复方案,建立了齿轮轴齿面激光熔覆温度场模型,通过计算分析,结合样块试验,确定了修复过程中的激光熔覆主要工艺参数;选用单向送粉双向扫描的熔覆方法,解决了熔覆层开裂的问题;针对计算结果中出现的齿面进出端和齿顶热集中效应和热冲击效应引起的过烧现象,提出了搭接熔覆和包覆熔覆的熔覆工艺,较好地消除了过烧现象.最终在磨损轮齿上得到了厚度达0.7mm质量稳定的优质熔覆层,完成了磨损轮齿的尺寸修复.该激光熔覆工艺可为类似的修复问题提供借鉴和指导. 相似文献
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激光熔覆修复单螺杆挤压机螺杆的试验研究 总被引:2,自引:0,他引:2
单螺杆挤压机螺杆磨损后,选用Ni60B合金粉末,并经氧乙炔焰喷涂和激光重熔后,熔覆合金层硬度可达到超过原基体材料的硬度,涂层与基体之间形成冶金结合,可满足零件性能要求。 相似文献
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单螺杆挤压机螺杆磨损后,选用Ni60B合金粉末,并经氧乙炔焰喷涂和激光重熔后,熔覆合金层硬度可达到或超过原基体材料的硬度,涂层与基体之间形成冶金结合,可满足零件性能要求。 相似文献
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进口的Cr12MoV高碳高合金钢Z形导杆磨损后,选用Ni60A合金粉末,经氧乙炔焰喷涂和激光重熔处理后,熔覆合金层硬度可达到或超过原基体材料的硬度,而且合金层结构致密、晶粒细小,涂层与基体之间形成冶金结合,可满足零件性能要求。 相似文献
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Mohammad Shahid Raza Manowar Hussain Vikash Kumar Alok Kumar Das 《Journal of Materials Engineering and Performance》2017,26(1):76-83
The growing need for high wear-resistant surface with enhanced physical properties has led to extensive researches in the field of surface engineering. Laser cladding emerged to be a promising method to achieve these objectives in a cost-effective way. The present paper studies the viability of cladding of tungsten disulfide (WS2) powder by using 400 W continuous-wave fiber laser. WS2 was used as a coating material, which was decomposed at higher temperature and underwent several chemical reactions. By this process, in situ formation of metal matrix composites and hard face coating on the substrate surface were attained. The characterization of laser cladded surface was done to study its morphological, microstructural, mechanical and tribological properties. It was observed that cladding of WS2 powder on 304 SS resulted in the formation of Cr-W-C-Fe metal matrix composite having improved mechanical and tribological properties. The value of microhardness of the coated surface was found to increase three to four times in comparison with the parent material surface. Wear test results indicated a decrease in wear by 1/9th (maximum) as compared to the parent 304 SS surface. The volume fractions of tungsten particles on the cladded surface were also investigated through EDS analysis. 相似文献
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This paper reports major advances in the understanding, refinement and application of high-power laser beam cladding. The most important relationships between essential laser process variables and clad characteristics are defined. The unmatched control of energy inherent in laser beam processing has satisfied challenging, requirements in material cladding applications. Significant refinements in control of optics, substrate and consumables are reported. Unprecedented applications, such as cladding of copper on steel and cladding within confined space envelopes, highlight the technical advantages of the laser process and underscore rewards of investments in laser metalworking development. 相似文献
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