金绍彤,杜晓东,钟一鸣,吴刚.送粉方式对WC 颗粒增强铁基熔覆层的影响[J].表面技术,2016,45(10):96-102.
JIN Shao-tong,DU Xiao-dong,ZHONG Yi-ming,WU Gang.Influence of Powder-Feeding Mode on Microstructure of WC Particles-Reinforced Fe-based Cladding Layer[J].Surface Technology,2016,45(10):96-102
送粉方式对WC 颗粒增强铁基熔覆层的影响
Influence of Powder-Feeding Mode on Microstructure of WC Particles-Reinforced Fe-based Cladding Layer
投稿时间:2016-05-28  修订日期:2016-10-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.10.015
中文关键词:  等离子喷焊  改进后送粉方式  WC 颗粒增强  WC 分布  粉末利用率  显微组织
英文关键词:plasma spray welding  improved back powder-feeding mode  WC particles-reinforced  distribution of WC  utilization ratio of powder  microstructure
基金项目:
作者单位
金绍彤 合肥工业大学 材料科学与工程学院,合肥 230009 
杜晓东 合肥工业大学 材料科学与工程学院,合肥 230009 
钟一鸣 合肥工业大学 材料科学与工程学院,合肥 230009 
吴刚 合肥工业大学 材料科学与工程学院,合肥 230009 
AuthorInstitution
JIN Shao-tong School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
DU Xiao-dong School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
ZHONG Yi-ming School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
WU Gang School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 改进后送粉方式在45#钢表面利用等离子喷焊技术制备WC 颗粒增强铁基耐磨熔覆层。方法 利用等离子喷焊机和加装改进的后送粉装置制备熔覆层,通过金相光学显微镜(OM)、扫描电子显微镜(SEM)、能谱仪(EDS)和X 射线衍射(XRD)等测试分析手段研究熔覆层的显微组织、相组成和成分特征。结果 后送粉电压和送粉方式对WC 颗粒分布的影响较大,通过调整送粉电压、改进后送粉方式可以改善WC 的分布以及WC 粉末的利用率。球形铸造WC 与多边形结晶WC 相比,前者粉末利用率显著提高,WC 颗粒分布更均匀,熔覆层的平均维氏硬度达到1500HV10 以上,高于后者。熔覆层出现鱼骨状莱氏体组织和大量的碳化物。结论 改进的后送粉方式包含了同步送粉和后送粉的优点,使WC 颗粒分布均匀,且WC 未出现很大程度溶解,保留原始形态。送粉电压为10 V 时,后送粉的熔覆效果较好。球形铸造WC 增强熔覆层的性能较多边形结晶WC 有很大提高。
英文摘要:
      The work aims to prepare WC particles-reinforced Fe-based wearproof cladding layer on the surface of 45# steel by plasma spray welding provided that back powder-feeding mode was improved. The cladding layer was prepared by plasma spray welding machine and improved back powder-feeding device. Test analysis methods including optical microscope (OM), scanning electronmicroscopy (SEM),X-ray diffractometer (XRD) and energy dispersive spectrometer (EDS) were used to study microstructure, phase composition and chemical compositions of the cladding layer. Since the distribution of WC particles was mainly determined by back powder-feeding voltage and powder-feeding mode, the distribution of WC particles and utilization ratio of WC powder could be improved by adjusting the powder-feeding voltage and improving back powder-feeding mode. Meanwhile, compared with spherical cast WC and polygonal crystal WC, utilization ratio of the former powder was increased obviously, WC particles were distributed more uniformly and average Vickers hardness of the cladding layer reached over 1500HV10, higher than the latter. Fishbone-like ledeburite structure and a mass of carbides were detected in the cladding layer subject to back-feeding spherical cast WC process. The improved back powder-feeding mode possesses the advantages of synchronous powder feeding and back feeding, providing uniform distribution of WC particles and retaining the original form without significant dissolution. Better cladding effects are made at powder-feeding voltage of 10 V. Spherical cast WC- reinforced cladding layer presents better performance than that of polygonal crystal WC.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第13565361位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: wjqkbm@163.com

渝公网安备 50010702501715号